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-rw-r--r--sys-kernel/linux-sources-redcore/files/linux-hardened.patch2713
1 files changed, 0 insertions, 2713 deletions
diff --git a/sys-kernel/linux-sources-redcore/files/linux-hardened.patch b/sys-kernel/linux-sources-redcore/files/linux-hardened.patch
deleted file mode 100644
index 94b56b85..00000000
--- a/sys-kernel/linux-sources-redcore/files/linux-hardened.patch
+++ /dev/null
@@ -1,2713 +0,0 @@
-diff -Naur linux-4.16/arch/arm64/configs/defconfig linux-4.16h-for-v3/arch/arm64/configs/defconfig
---- linux-4.16/arch/arm64/configs/defconfig 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/arch/arm64/configs/defconfig 2018-04-11 22:38:06.399998369 +0200
-@@ -1,4 +1,3 @@
--CONFIG_SYSVIPC=y
- CONFIG_POSIX_MQUEUE=y
- CONFIG_AUDIT=y
- CONFIG_NO_HZ_IDLE=y
-diff -Naur linux-4.16/arch/arm64/include/asm/elf.h linux-4.16h-for-v3/arch/arm64/include/asm/elf.h
---- linux-4.16/arch/arm64/include/asm/elf.h 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/arch/arm64/include/asm/elf.h 2018-04-11 22:38:06.399998369 +0200
-@@ -114,10 +114,10 @@
-
- /*
- * This is the base location for PIE (ET_DYN with INTERP) loads. On
-- * 64-bit, this is above 4GB to leave the entire 32-bit address
-+ * 64-bit, this is raised to 4GB to leave the entire 32-bit address
- * space open for things that want to use the area for 32-bit pointers.
- */
--#define ELF_ET_DYN_BASE (2 * TASK_SIZE_64 / 3)
-+#define ELF_ET_DYN_BASE 0x100000000UL
-
- #ifndef __ASSEMBLY__
-
-@@ -158,10 +158,10 @@
- /* 1GB of VA */
- #ifdef CONFIG_COMPAT
- #define STACK_RND_MASK (test_thread_flag(TIF_32BIT) ? \
-- 0x7ff >> (PAGE_SHIFT - 12) : \
-- 0x3ffff >> (PAGE_SHIFT - 12))
-+ ((1UL << mmap_rnd_compat_bits) - 1) >> (PAGE_SHIFT - 12) : \
-+ ((1UL << mmap_rnd_bits) - 1) >> (PAGE_SHIFT - 12))
- #else
--#define STACK_RND_MASK (0x3ffff >> (PAGE_SHIFT - 12))
-+#define STACK_RND_MASK (((1UL << mmap_rnd_bits) - 1) >> (PAGE_SHIFT - 12))
- #endif
-
- #ifdef __AARCH64EB__
-diff -Naur linux-4.16/arch/arm64/Kconfig linux-4.16h-for-v3/arch/arm64/Kconfig
---- linux-4.16/arch/arm64/Kconfig 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/arch/arm64/Kconfig 2018-04-11 22:38:06.399998369 +0200
-@@ -974,6 +974,7 @@
-
- config ARM64_SW_TTBR0_PAN
- bool "Emulate Privileged Access Never using TTBR0_EL1 switching"
-+ default y
- help
- Enabling this option prevents the kernel from accessing
- user-space memory directly by pointing TTBR0_EL1 to a reserved
-@@ -1127,6 +1128,7 @@
- bool "Randomize the address of the kernel image"
- select ARM64_MODULE_PLTS if MODULES
- select RELOCATABLE
-+ default y
- help
- Randomizes the virtual address at which the kernel image is
- loaded, as a security feature that deters exploit attempts
-diff -Naur linux-4.16/arch/arm64/Kconfig.debug linux-4.16h-for-v3/arch/arm64/Kconfig.debug
---- linux-4.16/arch/arm64/Kconfig.debug 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/arch/arm64/Kconfig.debug 2018-04-11 22:38:06.399998369 +0200
-@@ -45,6 +45,7 @@
- config DEBUG_WX
- bool "Warn on W+X mappings at boot"
- select ARM64_PTDUMP_CORE
-+ default y
- ---help---
- Generate a warning if any W+X mappings are found at boot.
-
-diff -Naur linux-4.16/arch/arm64/kernel/process.c linux-4.16h-for-v3/arch/arm64/kernel/process.c
---- linux-4.16/arch/arm64/kernel/process.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/arch/arm64/kernel/process.c 2018-04-11 22:38:06.399998369 +0200
-@@ -481,9 +481,9 @@
- unsigned long arch_randomize_brk(struct mm_struct *mm)
- {
- if (is_compat_task())
-- return randomize_page(mm->brk, SZ_32M);
-+ return mm->brk + get_random_long() % SZ_32M + PAGE_SIZE;
- else
-- return randomize_page(mm->brk, SZ_1G);
-+ return mm->brk + get_random_long() % SZ_1G + PAGE_SIZE;
- }
-
- /*
-diff -Naur linux-4.16/arch/Kconfig linux-4.16h-for-v3/arch/Kconfig
---- linux-4.16/arch/Kconfig 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/arch/Kconfig 2018-04-11 22:39:33.843421922 +0200
-@@ -454,6 +454,11 @@
- is some slowdown of the boot process (about 0.5%) and fork and
- irq processing.
-
-+ When extra_latent_entropy is passed on the kernel command line,
-+ entropy will be extracted from up to the first 4GB of RAM while the
-+ runtime memory allocator is being initialized. This costs even more
-+ slowdown of the boot process.
-+
- Note that entropy extracted this way is not cryptographically
- secure!
-
-@@ -541,7 +546,7 @@
- choice
- prompt "Stack Protector buffer overflow detection"
- depends on HAVE_CC_STACKPROTECTOR
-- default CC_STACKPROTECTOR_AUTO
-+ default CC_STACKPROTECTOR_STRONG
- help
- This option turns on the "stack-protector" GCC feature. This
- feature puts, at the beginning of functions, a canary value on
-@@ -747,7 +752,7 @@
- int "Number of bits to use for ASLR of mmap base address" if EXPERT
- range ARCH_MMAP_RND_BITS_MIN ARCH_MMAP_RND_BITS_MAX
- default ARCH_MMAP_RND_BITS_DEFAULT if ARCH_MMAP_RND_BITS_DEFAULT
-- default ARCH_MMAP_RND_BITS_MIN
-+ default ARCH_MMAP_RND_BITS_MAX
- depends on HAVE_ARCH_MMAP_RND_BITS
- help
- This value can be used to select the number of bits to use to
-@@ -781,7 +786,7 @@
- int "Number of bits to use for ASLR of mmap base address for compatible applications" if EXPERT
- range ARCH_MMAP_RND_COMPAT_BITS_MIN ARCH_MMAP_RND_COMPAT_BITS_MAX
- default ARCH_MMAP_RND_COMPAT_BITS_DEFAULT if ARCH_MMAP_RND_COMPAT_BITS_DEFAULT
-- default ARCH_MMAP_RND_COMPAT_BITS_MIN
-+ default ARCH_MMAP_RND_COMPAT_BITS_MAX
- depends on HAVE_ARCH_MMAP_RND_COMPAT_BITS
- help
- This value can be used to select the number of bits to use to
-@@ -968,6 +973,7 @@
-
- config REFCOUNT_FULL
- bool "Perform full reference count validation at the expense of speed"
-+ default y
- help
- Enabling this switches the refcounting infrastructure from a fast
- unchecked atomic_t implementation to a fully state checked
-diff -Naur linux-4.16/arch/x86/configs/x86_64_defconfig linux-4.16h-for-v3/arch/x86/configs/x86_64_defconfig
---- linux-4.16/arch/x86/configs/x86_64_defconfig 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/arch/x86/configs/x86_64_defconfig 2018-04-11 22:38:06.400997997 +0200
-@@ -1,5 +1,4 @@
- # CONFIG_LOCALVERSION_AUTO is not set
--CONFIG_SYSVIPC=y
- CONFIG_POSIX_MQUEUE=y
- CONFIG_BSD_PROCESS_ACCT=y
- CONFIG_TASKSTATS=y
-diff -Naur linux-4.16/arch/x86/entry/vdso/vma.c linux-4.16h-for-v3/arch/x86/entry/vdso/vma.c
---- linux-4.16/arch/x86/entry/vdso/vma.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/arch/x86/entry/vdso/vma.c 2018-04-11 22:38:06.400997997 +0200
-@@ -204,55 +204,9 @@
- }
-
- #ifdef CONFIG_X86_64
--/*
-- * Put the vdso above the (randomized) stack with another randomized
-- * offset. This way there is no hole in the middle of address space.
-- * To save memory make sure it is still in the same PTE as the stack
-- * top. This doesn't give that many random bits.
-- *
-- * Note that this algorithm is imperfect: the distribution of the vdso
-- * start address within a PMD is biased toward the end.
-- *
-- * Only used for the 64-bit and x32 vdsos.
-- */
--static unsigned long vdso_addr(unsigned long start, unsigned len)
--{
-- unsigned long addr, end;
-- unsigned offset;
--
-- /*
-- * Round up the start address. It can start out unaligned as a result
-- * of stack start randomization.
-- */
-- start = PAGE_ALIGN(start);
--
-- /* Round the lowest possible end address up to a PMD boundary. */
-- end = (start + len + PMD_SIZE - 1) & PMD_MASK;
-- if (end >= TASK_SIZE_MAX)
-- end = TASK_SIZE_MAX;
-- end -= len;
--
-- if (end > start) {
-- offset = get_random_int() % (((end - start) >> PAGE_SHIFT) + 1);
-- addr = start + (offset << PAGE_SHIFT);
-- } else {
-- addr = start;
-- }
--
-- /*
-- * Forcibly align the final address in case we have a hardware
-- * issue that requires alignment for performance reasons.
-- */
-- addr = align_vdso_addr(addr);
--
-- return addr;
--}
--
- static int map_vdso_randomized(const struct vdso_image *image)
- {
-- unsigned long addr = vdso_addr(current->mm->start_stack, image->size-image->sym_vvar_start);
--
-- return map_vdso(image, addr);
-+ return map_vdso(image, 0);
- }
- #endif
-
-diff -Naur linux-4.16/arch/x86/include/asm/elf.h linux-4.16h-for-v3/arch/x86/include/asm/elf.h
---- linux-4.16/arch/x86/include/asm/elf.h 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/arch/x86/include/asm/elf.h 2018-04-11 22:38:06.400997997 +0200
-@@ -249,11 +249,11 @@
-
- /*
- * This is the base location for PIE (ET_DYN with INTERP) loads. On
-- * 64-bit, this is above 4GB to leave the entire 32-bit address
-+ * 64-bit, this is raised to 4GB to leave the entire 32-bit address
- * space open for things that want to use the area for 32-bit pointers.
- */
- #define ELF_ET_DYN_BASE (mmap_is_ia32() ? 0x000400000UL : \
-- (DEFAULT_MAP_WINDOW / 3 * 2))
-+ 0x100000000UL)
-
- /* This yields a mask that user programs can use to figure out what
- instruction set this CPU supports. This could be done in user space,
-@@ -313,8 +313,8 @@
-
- #ifdef CONFIG_X86_32
-
--#define __STACK_RND_MASK(is32bit) (0x7ff)
--#define STACK_RND_MASK (0x7ff)
-+#define __STACK_RND_MASK(is32bit) ((1UL << mmap_rnd_bits) - 1)
-+#define STACK_RND_MASK ((1UL << mmap_rnd_bits) - 1)
-
- #define ARCH_DLINFO ARCH_DLINFO_IA32
-
-@@ -323,7 +323,11 @@
- #else /* CONFIG_X86_32 */
-
- /* 1GB for 64bit, 8MB for 32bit */
--#define __STACK_RND_MASK(is32bit) ((is32bit) ? 0x7ff : 0x3fffff)
-+#ifdef CONFIG_COMPAT
-+#define __STACK_RND_MASK(is32bit) ((is32bit) ? (1UL << mmap_rnd_compat_bits) - 1 : (1UL << mmap_rnd_bits) - 1)
-+#else
-+#define __STACK_RND_MASK(is32bit) ((1UL << mmap_rnd_bits) - 1)
-+#endif
- #define STACK_RND_MASK __STACK_RND_MASK(mmap_is_ia32())
-
- #define ARCH_DLINFO \
-@@ -381,5 +385,4 @@
- } ____cacheline_aligned;
-
- extern struct va_alignment va_align;
--extern unsigned long align_vdso_addr(unsigned long);
- #endif /* _ASM_X86_ELF_H */
-diff -Naur linux-4.16/arch/x86/include/asm/tlbflush.h linux-4.16h-for-v3/arch/x86/include/asm/tlbflush.h
---- linux-4.16/arch/x86/include/asm/tlbflush.h 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/arch/x86/include/asm/tlbflush.h 2018-04-11 22:38:06.400997997 +0200
-@@ -261,6 +261,7 @@
-
- local_irq_save(flags);
- cr4 = this_cpu_read(cpu_tlbstate.cr4);
-+ BUG_ON(cr4 != __read_cr4());
- if ((cr4 | mask) != cr4)
- __cr4_set(cr4 | mask);
- local_irq_restore(flags);
-@@ -273,6 +274,7 @@
-
- local_irq_save(flags);
- cr4 = this_cpu_read(cpu_tlbstate.cr4);
-+ BUG_ON(cr4 != __read_cr4());
- if ((cr4 & ~mask) != cr4)
- __cr4_set(cr4 & ~mask);
- local_irq_restore(flags);
-@@ -283,6 +285,7 @@
- unsigned long cr4;
-
- cr4 = this_cpu_read(cpu_tlbstate.cr4);
-+ BUG_ON(cr4 != __read_cr4());
- __cr4_set(cr4 ^ mask);
- }
-
-@@ -389,6 +392,7 @@
- raw_local_irq_save(flags);
-
- cr4 = this_cpu_read(cpu_tlbstate.cr4);
-+ BUG_ON(cr4 != __read_cr4());
- /* toggle PGE */
- native_write_cr4(cr4 ^ X86_CR4_PGE);
- /* write old PGE again and flush TLBs */
-diff -Naur linux-4.16/arch/x86/Kconfig linux-4.16h-for-v3/arch/x86/Kconfig
---- linux-4.16/arch/x86/Kconfig 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/arch/x86/Kconfig 2018-04-11 22:38:06.400997997 +0200
-@@ -1208,8 +1208,7 @@
- default X86_LEGACY_VM86
-
- config X86_16BIT
-- bool "Enable support for 16-bit segments" if EXPERT
-- default y
-+ bool "Enable support for 16-bit segments"
- depends on MODIFY_LDT_SYSCALL
- ---help---
- This option is required by programs like Wine to run 16-bit
-@@ -2299,7 +2298,7 @@
- choice
- prompt "vsyscall table for legacy applications"
- depends on X86_64
-- default LEGACY_VSYSCALL_EMULATE
-+ default LEGACY_VSYSCALL_NONE
- help
- Legacy user code that does not know how to find the vDSO expects
- to be able to issue three syscalls by calling fixed addresses in
-@@ -2380,8 +2379,7 @@
- be set to 'N' under normal conditions.
-
- config MODIFY_LDT_SYSCALL
-- bool "Enable the LDT (local descriptor table)" if EXPERT
-- default y
-+ bool "Enable the LDT (local descriptor table)"
- ---help---
- Linux can allow user programs to install a per-process x86
- Local Descriptor Table (LDT) using the modify_ldt(2) system
-diff -Naur linux-4.16/arch/x86/Kconfig.debug linux-4.16h-for-v3/arch/x86/Kconfig.debug
---- linux-4.16/arch/x86/Kconfig.debug 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/arch/x86/Kconfig.debug 2018-04-11 22:38:06.400997997 +0200
-@@ -101,6 +101,7 @@
- config DEBUG_WX
- bool "Warn on W+X mappings at boot"
- select X86_PTDUMP_CORE
-+ default y
- ---help---
- Generate a warning if any W+X mappings are found at boot.
-
-diff -Naur linux-4.16/arch/x86/kernel/cpu/common.c linux-4.16h-for-v3/arch/x86/kernel/cpu/common.c
---- linux-4.16/arch/x86/kernel/cpu/common.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/arch/x86/kernel/cpu/common.c 2018-04-11 22:38:06.401997625 +0200
-@@ -1617,7 +1617,6 @@
- wrmsrl(MSR_KERNEL_GS_BASE, 0);
- barrier();
-
-- x86_configure_nx();
- x2apic_setup();
-
- /*
-diff -Naur linux-4.16/arch/x86/kernel/process.c linux-4.16h-for-v3/arch/x86/kernel/process.c
---- linux-4.16/arch/x86/kernel/process.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/arch/x86/kernel/process.c 2018-04-11 22:38:06.401997625 +0200
-@@ -38,6 +38,8 @@
- #include <asm/switch_to.h>
- #include <asm/desc.h>
- #include <asm/prctl.h>
-+#include <asm/elf.h>
-+#include <linux/sizes.h>
-
- /*
- * per-CPU TSS segments. Threads are completely 'soft' on Linux,
-@@ -572,7 +574,10 @@
-
- unsigned long arch_randomize_brk(struct mm_struct *mm)
- {
-- return randomize_page(mm->brk, 0x02000000);
-+ if (mmap_is_ia32())
-+ return mm->brk + get_random_long() % SZ_32M + PAGE_SIZE;
-+ else
-+ return mm->brk + get_random_long() % SZ_1G + PAGE_SIZE;
- }
-
- /*
-diff -Naur linux-4.16/arch/x86/kernel/sys_x86_64.c linux-4.16h-for-v3/arch/x86/kernel/sys_x86_64.c
---- linux-4.16/arch/x86/kernel/sys_x86_64.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/arch/x86/kernel/sys_x86_64.c 2018-04-11 22:38:06.401997625 +0200
-@@ -54,13 +54,6 @@
- return va_align.bits & get_align_mask();
- }
-
--unsigned long align_vdso_addr(unsigned long addr)
--{
-- unsigned long align_mask = get_align_mask();
-- addr = (addr + align_mask) & ~align_mask;
-- return addr | get_align_bits();
--}
--
- static int __init control_va_addr_alignment(char *str)
- {
- /* guard against enabling this on other CPU families */
-@@ -122,10 +115,7 @@
- }
-
- *begin = get_mmap_base(1);
-- if (in_compat_syscall())
-- *end = task_size_32bit();
-- else
-- *end = task_size_64bit(addr > DEFAULT_MAP_WINDOW);
-+ *end = get_mmap_base(0);
- }
-
- unsigned long
-@@ -210,7 +200,7 @@
-
- info.flags = VM_UNMAPPED_AREA_TOPDOWN;
- info.length = len;
-- info.low_limit = PAGE_SIZE;
-+ info.low_limit = get_mmap_base(1);
- info.high_limit = get_mmap_base(0);
-
- /*
-diff -Naur linux-4.16/arch/x86/mm/init_32.c linux-4.16h-for-v3/arch/x86/mm/init_32.c
---- linux-4.16/arch/x86/mm/init_32.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/arch/x86/mm/init_32.c 2018-04-11 22:38:06.401997625 +0200
-@@ -558,7 +558,7 @@
- permanent_kmaps_init(pgd_base);
- }
-
--pteval_t __supported_pte_mask __read_mostly = ~(_PAGE_NX | _PAGE_GLOBAL);
-+pteval_t __supported_pte_mask __ro_after_init = ~(_PAGE_NX | _PAGE_GLOBAL);
- EXPORT_SYMBOL_GPL(__supported_pte_mask);
-
- /* user-defined highmem size */
-@@ -866,7 +866,7 @@
- #endif
- #endif
-
--int kernel_set_to_readonly __read_mostly;
-+int kernel_set_to_readonly __ro_after_init;
-
- void set_kernel_text_rw(void)
- {
-@@ -918,12 +918,11 @@
- unsigned long start = PFN_ALIGN(_text);
- unsigned long size = PFN_ALIGN(_etext) - start;
-
-+ kernel_set_to_readonly = 1;
- set_pages_ro(virt_to_page(start), size >> PAGE_SHIFT);
- printk(KERN_INFO "Write protecting the kernel text: %luk\n",
- size >> 10);
-
-- kernel_set_to_readonly = 1;
--
- #ifdef CONFIG_CPA_DEBUG
- printk(KERN_INFO "Testing CPA: Reverting %lx-%lx\n",
- start, start+size);
-diff -Naur linux-4.16/arch/x86/mm/init_64.c linux-4.16h-for-v3/arch/x86/mm/init_64.c
---- linux-4.16/arch/x86/mm/init_64.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/arch/x86/mm/init_64.c 2018-04-11 22:38:06.401997625 +0200
-@@ -65,7 +65,7 @@
- * around without checking the pgd every time.
- */
-
--pteval_t __supported_pte_mask __read_mostly = ~0;
-+pteval_t __supported_pte_mask __ro_after_init = ~0;
- EXPORT_SYMBOL_GPL(__supported_pte_mask);
-
- int force_personality32;
-@@ -1195,7 +1195,7 @@
- mem_init_print_info(NULL);
- }
-
--int kernel_set_to_readonly;
-+int kernel_set_to_readonly __ro_after_init;
-
- void set_kernel_text_rw(void)
- {
-@@ -1244,9 +1244,8 @@
-
- printk(KERN_INFO "Write protecting the kernel read-only data: %luk\n",
- (end - start) >> 10);
-- set_memory_ro(start, (end - start) >> PAGE_SHIFT);
--
- kernel_set_to_readonly = 1;
-+ set_memory_ro(start, (end - start) >> PAGE_SHIFT);
-
- /*
- * The rodata/data/bss/brk section (but not the kernel text!)
-diff -Naur linux-4.16/block/blk-softirq.c linux-4.16h-for-v3/block/blk-softirq.c
---- linux-4.16/block/blk-softirq.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/block/blk-softirq.c 2018-04-11 22:38:06.401997625 +0200
-@@ -20,7 +20,7 @@
- * Softirq action handler - move entries to local list and loop over them
- * while passing them to the queue registered handler.
- */
--static __latent_entropy void blk_done_softirq(struct softirq_action *h)
-+static __latent_entropy void blk_done_softirq(void)
- {
- struct list_head *cpu_list, local_list;
-
-diff -Naur linux-4.16/Documentation/admin-guide/kernel-parameters.txt linux-4.16h-for-v3/Documentation/admin-guide/kernel-parameters.txt
---- linux-4.16/Documentation/admin-guide/kernel-parameters.txt 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/Documentation/admin-guide/kernel-parameters.txt 2018-04-11 22:38:06.397999114 +0200
-@@ -496,16 +496,6 @@
- nosocket -- Disable socket memory accounting.
- nokmem -- Disable kernel memory accounting.
-
-- checkreqprot [SELINUX] Set initial checkreqprot flag value.
-- Format: { "0" | "1" }
-- See security/selinux/Kconfig help text.
-- 0 -- check protection applied by kernel (includes
-- any implied execute protection).
-- 1 -- check protection requested by application.
-- Default value is set via a kernel config option.
-- Value can be changed at runtime via
-- /selinux/checkreqprot.
--
- cio_ignore= [S390]
- See Documentation/s390/CommonIO for details.
- clk_ignore_unused
-@@ -2943,6 +2933,11 @@
- the specified number of seconds. This is to be used if
- your oopses keep scrolling off the screen.
-
-+ extra_latent_entropy
-+ Enable a very simple form of latent entropy extraction
-+ from the first 4GB of memory as the bootmem allocator
-+ passes the memory pages to the buddy allocator.
-+
- pcbit= [HW,ISDN]
-
- pcd. [PARIDE]
-diff -Naur linux-4.16/Documentation/sysctl/kernel.txt linux-4.16h-for-v3/Documentation/sysctl/kernel.txt
---- linux-4.16/Documentation/sysctl/kernel.txt 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/Documentation/sysctl/kernel.txt 2018-04-11 22:38:06.398998742 +0200
-@@ -92,6 +92,7 @@
- - sysctl_writes_strict
- - tainted
- - threads-max
-+- tiocsti_restrict
- - unknown_nmi_panic
- - watchdog
- - watchdog_thresh
-@@ -1014,6 +1015,26 @@
-
- ==============================================================
-
-+tiocsti_restrict:
-+
-+This toggle indicates whether unprivileged users are prevented
-+from using the TIOCSTI ioctl to inject commands into other processes
-+which share a tty session.
-+
-+When tiocsti_restrict is set to (0) there are no restrictions(accept
-+the default restriction of only being able to injection commands into
-+one's own tty). When tiocsti_restrict is set to (1), users must
-+have CAP_SYS_ADMIN to use the TIOCSTI ioctl.
-+
-+When user namespaces are in use, the check for the capability
-+CAP_SYS_ADMIN is done against the user namespace that originally
-+opened the tty.
-+
-+The kernel config option CONFIG_SECURITY_TIOCSTI_RESTRICT sets the
-+default value of tiocsti_restrict.
-+
-+==============================================================
-+
- unknown_nmi_panic:
-
- The value in this file affects behavior of handling NMI. When the
-diff -Naur linux-4.16/drivers/ata/libata-core.c linux-4.16h-for-v3/drivers/ata/libata-core.c
---- linux-4.16/drivers/ata/libata-core.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/drivers/ata/libata-core.c 2018-04-11 22:38:06.402997252 +0200
-@@ -5148,7 +5148,7 @@
- struct ata_port *ap;
- unsigned int tag;
-
-- WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
-+ BUG_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
- ap = qc->ap;
-
- qc->flags = 0;
-@@ -5165,7 +5165,7 @@
- struct ata_port *ap;
- struct ata_link *link;
-
-- WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
-+ BUG_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
- WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE));
- ap = qc->ap;
- link = qc->dev->link;
-diff -Naur linux-4.16/drivers/char/Kconfig linux-4.16h-for-v3/drivers/char/Kconfig
---- linux-4.16/drivers/char/Kconfig 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/drivers/char/Kconfig 2018-04-11 22:38:06.402997252 +0200
-@@ -9,7 +9,6 @@
-
- config DEVMEM
- bool "/dev/mem virtual device support"
-- default y
- help
- Say Y here if you want to support the /dev/mem device.
- The /dev/mem device is used to access areas of physical
-@@ -568,7 +567,6 @@
- config DEVPORT
- bool "/dev/port character device"
- depends on ISA || PCI
-- default y
- help
- Say Y here if you want to support the /dev/port device. The /dev/port
- device is similar to /dev/mem, but for I/O ports.
-diff -Naur linux-4.16/drivers/media/dvb-frontends/cx24116.c linux-4.16h-for-v3/drivers/media/dvb-frontends/cx24116.c
---- linux-4.16/drivers/media/dvb-frontends/cx24116.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/drivers/media/dvb-frontends/cx24116.c 2018-04-11 22:38:06.402997252 +0200
-@@ -1456,7 +1456,7 @@
- return cx24116_read_status(fe, status);
- }
-
--static int cx24116_get_algo(struct dvb_frontend *fe)
-+static enum dvbfe_algo cx24116_get_algo(struct dvb_frontend *fe)
- {
- return DVBFE_ALGO_HW;
- }
-diff -Naur linux-4.16/drivers/media/dvb-frontends/cx24117.c linux-4.16h-for-v3/drivers/media/dvb-frontends/cx24117.c
---- linux-4.16/drivers/media/dvb-frontends/cx24117.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/drivers/media/dvb-frontends/cx24117.c 2018-04-11 22:38:06.403996880 +0200
-@@ -1555,7 +1555,7 @@
- return cx24117_read_status(fe, status);
- }
-
--static int cx24117_get_algo(struct dvb_frontend *fe)
-+static enum dvbfe_algo cx24117_get_algo(struct dvb_frontend *fe)
- {
- return DVBFE_ALGO_HW;
- }
-diff -Naur linux-4.16/drivers/media/dvb-frontends/cx24120.c linux-4.16h-for-v3/drivers/media/dvb-frontends/cx24120.c
---- linux-4.16/drivers/media/dvb-frontends/cx24120.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/drivers/media/dvb-frontends/cx24120.c 2018-04-11 22:38:06.403996880 +0200
-@@ -1491,7 +1491,7 @@
- return cx24120_read_status(fe, status);
- }
-
--static int cx24120_get_algo(struct dvb_frontend *fe)
-+static enum dvbfe_algo cx24120_get_algo(struct dvb_frontend *fe)
- {
- return DVBFE_ALGO_HW;
- }
-diff -Naur linux-4.16/drivers/media/dvb-frontends/cx24123.c linux-4.16h-for-v3/drivers/media/dvb-frontends/cx24123.c
---- linux-4.16/drivers/media/dvb-frontends/cx24123.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/drivers/media/dvb-frontends/cx24123.c 2018-04-11 22:38:06.403996880 +0200
-@@ -1005,7 +1005,7 @@
- return retval;
- }
-
--static int cx24123_get_algo(struct dvb_frontend *fe)
-+static enum dvbfe_algo cx24123_get_algo(struct dvb_frontend *fe)
- {
- return DVBFE_ALGO_HW;
- }
-diff -Naur linux-4.16/drivers/media/dvb-frontends/cxd2820r_core.c linux-4.16h-for-v3/drivers/media/dvb-frontends/cxd2820r_core.c
---- linux-4.16/drivers/media/dvb-frontends/cxd2820r_core.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/drivers/media/dvb-frontends/cxd2820r_core.c 2018-04-11 22:38:06.403996880 +0200
-@@ -403,7 +403,7 @@
- return DVBFE_ALGO_SEARCH_ERROR;
- }
-
--static int cxd2820r_get_frontend_algo(struct dvb_frontend *fe)
-+static enum dvbfe_algo cxd2820r_get_frontend_algo(struct dvb_frontend *fe)
- {
- return DVBFE_ALGO_CUSTOM;
- }
-diff -Naur linux-4.16/drivers/media/dvb-frontends/mb86a20s.c linux-4.16h-for-v3/drivers/media/dvb-frontends/mb86a20s.c
---- linux-4.16/drivers/media/dvb-frontends/mb86a20s.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/drivers/media/dvb-frontends/mb86a20s.c 2018-04-11 22:38:06.403996880 +0200
-@@ -2055,7 +2055,7 @@
- kfree(state);
- }
-
--static int mb86a20s_get_frontend_algo(struct dvb_frontend *fe)
-+static enum dvbfe_algo mb86a20s_get_frontend_algo(struct dvb_frontend *fe)
- {
- return DVBFE_ALGO_HW;
- }
-diff -Naur linux-4.16/drivers/media/dvb-frontends/s921.c linux-4.16h-for-v3/drivers/media/dvb-frontends/s921.c
---- linux-4.16/drivers/media/dvb-frontends/s921.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/drivers/media/dvb-frontends/s921.c 2018-04-11 22:38:06.404996507 +0200
-@@ -464,7 +464,7 @@
- return rc;
- }
-
--static int s921_get_algo(struct dvb_frontend *fe)
-+static enum dvbfe_algo s921_get_algo(struct dvb_frontend *fe)
- {
- return DVBFE_ALGO_HW;
- }
-diff -Naur linux-4.16/drivers/media/pci/bt8xx/dst.c linux-4.16h-for-v3/drivers/media/pci/bt8xx/dst.c
---- linux-4.16/drivers/media/pci/bt8xx/dst.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/drivers/media/pci/bt8xx/dst.c 2018-04-11 22:38:06.404996507 +0200
-@@ -1657,7 +1657,7 @@
- return 0;
- }
-
--static int dst_get_tuning_algo(struct dvb_frontend *fe)
-+static enum dvbfe_algo dst_get_tuning_algo(struct dvb_frontend *fe)
- {
- return dst_algo ? DVBFE_ALGO_HW : DVBFE_ALGO_SW;
- }
-diff -Naur linux-4.16/drivers/media/pci/pt1/va1j5jf8007s.c linux-4.16h-for-v3/drivers/media/pci/pt1/va1j5jf8007s.c
---- linux-4.16/drivers/media/pci/pt1/va1j5jf8007s.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/drivers/media/pci/pt1/va1j5jf8007s.c 2018-04-11 22:38:06.404996507 +0200
-@@ -98,7 +98,7 @@
- return 0;
- }
-
--static int va1j5jf8007s_get_frontend_algo(struct dvb_frontend *fe)
-+static enum dvbfe_algo va1j5jf8007s_get_frontend_algo(struct dvb_frontend *fe)
- {
- return DVBFE_ALGO_HW;
- }
-diff -Naur linux-4.16/drivers/media/pci/pt1/va1j5jf8007t.c linux-4.16h-for-v3/drivers/media/pci/pt1/va1j5jf8007t.c
---- linux-4.16/drivers/media/pci/pt1/va1j5jf8007t.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/drivers/media/pci/pt1/va1j5jf8007t.c 2018-04-11 22:38:06.404996507 +0200
-@@ -88,7 +88,7 @@
- return 0;
- }
-
--static int va1j5jf8007t_get_frontend_algo(struct dvb_frontend *fe)
-+static enum dvbfe_algo va1j5jf8007t_get_frontend_algo(struct dvb_frontend *fe)
- {
- return DVBFE_ALGO_HW;
- }
-diff -Naur linux-4.16/drivers/tty/Kconfig linux-4.16h-for-v3/drivers/tty/Kconfig
---- linux-4.16/drivers/tty/Kconfig 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/drivers/tty/Kconfig 2018-04-11 22:38:06.404996507 +0200
-@@ -122,7 +122,6 @@
-
- config LEGACY_PTYS
- bool "Legacy (BSD) PTY support"
-- default y
- ---help---
- A pseudo terminal (PTY) is a software device consisting of two
- halves: a master and a slave. The slave device behaves identical to
-diff -Naur linux-4.16/drivers/tty/tty_io.c linux-4.16h-for-v3/drivers/tty/tty_io.c
---- linux-4.16/drivers/tty/tty_io.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/drivers/tty/tty_io.c 2018-04-11 22:38:06.404996507 +0200
-@@ -172,6 +172,7 @@
- put_device(tty->dev);
- kfree(tty->write_buf);
- tty->magic = 0xDEADDEAD;
-+ put_user_ns(tty->owner_user_ns);
- kfree(tty);
- }
-
-@@ -2155,11 +2156,19 @@
- * FIXME: may race normal receive processing
- */
-
-+int tiocsti_restrict = IS_ENABLED(CONFIG_SECURITY_TIOCSTI_RESTRICT);
-+
- static int tiocsti(struct tty_struct *tty, char __user *p)
- {
- char ch, mbz = 0;
- struct tty_ldisc *ld;
-
-+ if (tiocsti_restrict &&
-+ !ns_capable(tty->owner_user_ns, CAP_SYS_ADMIN)) {
-+ dev_warn_ratelimited(tty->dev,
-+ "Denied TIOCSTI ioctl for non-privileged process\n");
-+ return -EPERM;
-+ }
- if ((current->signal->tty != tty) && !capable(CAP_SYS_ADMIN))
- return -EPERM;
- if (get_user(ch, p))
-@@ -2839,6 +2848,7 @@
- tty->index = idx;
- tty_line_name(driver, idx, tty->name);
- tty->dev = tty_get_device(tty);
-+ tty->owner_user_ns = get_user_ns(current_user_ns());
-
- return tty;
- }
-diff -Naur linux-4.16/drivers/usb/core/hub.c linux-4.16h-for-v3/drivers/usb/core/hub.c
---- linux-4.16/drivers/usb/core/hub.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/drivers/usb/core/hub.c 2018-04-11 22:38:06.405996135 +0200
-@@ -41,6 +41,8 @@
- #define USB_TP_TRANSMISSION_DELAY 40 /* ns */
- #define USB_TP_TRANSMISSION_DELAY_MAX 65535 /* ns */
-
-+extern int deny_new_usb;
-+
- /* Protect struct usb_device->state and ->children members
- * Note: Both are also protected by ->dev.sem, except that ->state can
- * change to USB_STATE_NOTATTACHED even when the semaphore isn't held. */
-@@ -4839,6 +4841,12 @@
- goto done;
- return;
- }
-+
-+ if (deny_new_usb) {
-+ dev_err(&port_dev->dev, "denied insert of USB device on port %d\n", port1);
-+ goto done;
-+ }
-+
- if (hub_is_superspeed(hub->hdev))
- unit_load = 150;
- else
-diff -Naur linux-4.16/fs/exec.c linux-4.16h-for-v3/fs/exec.c
---- linux-4.16/fs/exec.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/fs/exec.c 2018-04-11 22:38:06.406995762 +0200
-@@ -62,6 +62,7 @@
- #include <linux/oom.h>
- #include <linux/compat.h>
- #include <linux/vmalloc.h>
-+#include <linux/random.h>
-
- #include <linux/uaccess.h>
- #include <asm/mmu_context.h>
-@@ -321,6 +322,8 @@
- arch_bprm_mm_init(mm, vma);
- up_write(&mm->mmap_sem);
- bprm->p = vma->vm_end - sizeof(void *);
-+ if (randomize_va_space)
-+ bprm->p ^= get_random_int() & ~PAGE_MASK;
- return 0;
- err:
- up_write(&mm->mmap_sem);
-diff -Naur linux-4.16/fs/namei.c linux-4.16h-for-v3/fs/namei.c
---- linux-4.16/fs/namei.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/fs/namei.c 2018-04-11 22:38:06.406995762 +0200
-@@ -882,8 +882,8 @@
- path_put(&last->link);
- }
-
--int sysctl_protected_symlinks __read_mostly = 0;
--int sysctl_protected_hardlinks __read_mostly = 0;
-+int sysctl_protected_symlinks __read_mostly = 1;
-+int sysctl_protected_hardlinks __read_mostly = 1;
-
- /**
- * may_follow_link - Check symlink following for unsafe situations
-diff -Naur linux-4.16/fs/nfs/Kconfig linux-4.16h-for-v3/fs/nfs/Kconfig
---- linux-4.16/fs/nfs/Kconfig 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/fs/nfs/Kconfig 2018-04-11 22:38:06.406995762 +0200
-@@ -195,4 +195,3 @@
- bool
- depends on NFS_FS && SUNRPC_DEBUG
- select CRC32
-- default y
-diff -Naur linux-4.16/fs/proc/Kconfig linux-4.16h-for-v3/fs/proc/Kconfig
---- linux-4.16/fs/proc/Kconfig 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/fs/proc/Kconfig 2018-04-11 22:38:06.407995390 +0200
-@@ -39,7 +39,6 @@
- config PROC_VMCORE
- bool "/proc/vmcore support"
- depends on PROC_FS && CRASH_DUMP
-- default y
- help
- Exports the dump image of crashed kernel in ELF format.
-
-diff -Naur linux-4.16/fs/stat.c linux-4.16h-for-v3/fs/stat.c
---- linux-4.16/fs/stat.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/fs/stat.c 2018-04-11 22:38:06.407995390 +0200
-@@ -40,8 +40,13 @@
- stat->gid = inode->i_gid;
- stat->rdev = inode->i_rdev;
- stat->size = i_size_read(inode);
-- stat->atime = inode->i_atime;
-- stat->mtime = inode->i_mtime;
-+ if (is_sidechannel_device(inode) && !capable_noaudit(CAP_MKNOD)) {
-+ stat->atime = inode->i_ctime;
-+ stat->mtime = inode->i_ctime;
-+ } else {
-+ stat->atime = inode->i_atime;
-+ stat->mtime = inode->i_mtime;
-+ }
- stat->ctime = inode->i_ctime;
- stat->blksize = i_blocksize(inode);
- stat->blocks = inode->i_blocks;
-@@ -75,9 +80,14 @@
- stat->result_mask |= STATX_BASIC_STATS;
- request_mask &= STATX_ALL;
- query_flags &= KSTAT_QUERY_FLAGS;
-- if (inode->i_op->getattr)
-- return inode->i_op->getattr(path, stat, request_mask,
-- query_flags);
-+ if (inode->i_op->getattr) {
-+ int retval = inode->i_op->getattr(path, stat, request_mask, query_flags);
-+ if (!retval && is_sidechannel_device(inode) && !capable_noaudit(CAP_MKNOD)) {
-+ stat->atime = stat->ctime;
-+ stat->mtime = stat->ctime;
-+ }
-+ return retval;
-+ }
-
- generic_fillattr(inode, stat);
- return 0;
-diff -Naur linux-4.16/include/linux/cache.h linux-4.16h-for-v3/include/linux/cache.h
---- linux-4.16/include/linux/cache.h 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/include/linux/cache.h 2018-04-11 22:38:06.407995390 +0200
-@@ -31,6 +31,8 @@
- #define __ro_after_init __attribute__((__section__(".data..ro_after_init")))
- #endif
-
-+#define __read_only __ro_after_init
-+
- #ifndef ____cacheline_aligned
- #define ____cacheline_aligned __attribute__((__aligned__(SMP_CACHE_BYTES)))
- #endif
-diff -Naur linux-4.16/include/linux/capability.h linux-4.16h-for-v3/include/linux/capability.h
---- linux-4.16/include/linux/capability.h 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/include/linux/capability.h 2018-04-11 22:38:06.407995390 +0200
-@@ -207,6 +207,7 @@
- extern bool has_ns_capability_noaudit(struct task_struct *t,
- struct user_namespace *ns, int cap);
- extern bool capable(int cap);
-+extern bool capable_noaudit(int cap);
- extern bool ns_capable(struct user_namespace *ns, int cap);
- extern bool ns_capable_noaudit(struct user_namespace *ns, int cap);
- #else
-@@ -232,6 +233,10 @@
- {
- return true;
- }
-+static inline bool capable_noaudit(int cap)
-+{
-+ return true;
-+}
- static inline bool ns_capable(struct user_namespace *ns, int cap)
- {
- return true;
-diff -Naur linux-4.16/include/linux/fs.h linux-4.16h-for-v3/include/linux/fs.h
---- linux-4.16/include/linux/fs.h 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/include/linux/fs.h 2018-04-11 22:38:06.407995390 +0200
-@@ -3407,4 +3407,15 @@
- extern bool path_noexec(const struct path *path);
- extern void inode_nohighmem(struct inode *inode);
-
-+extern int device_sidechannel_restrict;
-+
-+static inline bool is_sidechannel_device(const struct inode *inode)
-+{
-+ umode_t mode;
-+ if (!device_sidechannel_restrict)
-+ return false;
-+ mode = inode->i_mode;
-+ return ((S_ISCHR(mode) || S_ISBLK(mode)) && (mode & (S_IROTH | S_IWOTH)));
-+}
-+
- #endif /* _LINUX_FS_H */
-diff -Naur linux-4.16/include/linux/fsnotify.h linux-4.16h-for-v3/include/linux/fsnotify.h
---- linux-4.16/include/linux/fsnotify.h 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/include/linux/fsnotify.h 2018-04-11 22:38:06.407995390 +0200
-@@ -181,6 +181,9 @@
- struct inode *inode = path->dentry->d_inode;
- __u32 mask = FS_ACCESS;
-
-+ if (is_sidechannel_device(inode))
-+ return;
-+
- if (S_ISDIR(inode->i_mode))
- mask |= FS_ISDIR;
-
-@@ -199,6 +202,9 @@
- struct inode *inode = path->dentry->d_inode;
- __u32 mask = FS_MODIFY;
-
-+ if (is_sidechannel_device(inode))
-+ return;
-+
- if (S_ISDIR(inode->i_mode))
- mask |= FS_ISDIR;
-
-diff -Naur linux-4.16/include/linux/gfp.h linux-4.16h-for-v3/include/linux/gfp.h
---- linux-4.16/include/linux/gfp.h 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/include/linux/gfp.h 2018-04-11 22:38:06.408995018 +0200
-@@ -513,9 +513,9 @@
- extern unsigned long __get_free_pages(gfp_t gfp_mask, unsigned int order);
- extern unsigned long get_zeroed_page(gfp_t gfp_mask);
-
--void *alloc_pages_exact(size_t size, gfp_t gfp_mask);
-+void *alloc_pages_exact(size_t size, gfp_t gfp_mask) __attribute__((alloc_size(1)));
- void free_pages_exact(void *virt, size_t size);
--void * __meminit alloc_pages_exact_nid(int nid, size_t size, gfp_t gfp_mask);
-+void * __meminit alloc_pages_exact_nid(int nid, size_t size, gfp_t gfp_mask) __attribute__((alloc_size(1)));
-
- #define __get_free_page(gfp_mask) \
- __get_free_pages((gfp_mask), 0)
-diff -Naur linux-4.16/include/linux/highmem.h linux-4.16h-for-v3/include/linux/highmem.h
---- linux-4.16/include/linux/highmem.h 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/include/linux/highmem.h 2018-04-11 22:38:06.408995018 +0200
-@@ -191,6 +191,13 @@
- kunmap_atomic(kaddr);
- }
-
-+static inline void verify_zero_highpage(struct page *page)
-+{
-+ void *kaddr = kmap_atomic(page);
-+ BUG_ON(memchr_inv(kaddr, 0, PAGE_SIZE));
-+ kunmap_atomic(kaddr);
-+}
-+
- static inline void zero_user_segments(struct page *page,
- unsigned start1, unsigned end1,
- unsigned start2, unsigned end2)
-diff -Naur linux-4.16/include/linux/interrupt.h linux-4.16h-for-v3/include/linux/interrupt.h
---- linux-4.16/include/linux/interrupt.h 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/include/linux/interrupt.h 2018-04-11 22:38:06.408995018 +0200
-@@ -485,7 +485,7 @@
-
- struct softirq_action
- {
-- void (*action)(struct softirq_action *);
-+ void (*action)(void);
- };
-
- asmlinkage void do_softirq(void);
-@@ -500,7 +500,7 @@
- }
- #endif
-
--extern void open_softirq(int nr, void (*action)(struct softirq_action *));
-+extern void __init open_softirq(int nr, void (*action)(void));
- extern void softirq_init(void);
- extern void __raise_softirq_irqoff(unsigned int nr);
-
-diff -Naur linux-4.16/include/linux/kobject_ns.h linux-4.16h-for-v3/include/linux/kobject_ns.h
---- linux-4.16/include/linux/kobject_ns.h 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/include/linux/kobject_ns.h 2018-04-11 22:38:06.408995018 +0200
-@@ -45,7 +45,7 @@
- void (*drop_ns)(void *);
- };
-
--int kobj_ns_type_register(const struct kobj_ns_type_operations *ops);
-+int __init kobj_ns_type_register(const struct kobj_ns_type_operations *ops);
- int kobj_ns_type_registered(enum kobj_ns_type type);
- const struct kobj_ns_type_operations *kobj_child_ns_ops(struct kobject *parent);
- const struct kobj_ns_type_operations *kobj_ns_ops(struct kobject *kobj);
-diff -Naur linux-4.16/include/linux/mm.h linux-4.16h-for-v3/include/linux/mm.h
---- linux-4.16/include/linux/mm.h 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/include/linux/mm.h 2018-04-11 22:38:06.408995018 +0200
-@@ -535,7 +535,7 @@
- }
- #endif
-
--extern void *kvmalloc_node(size_t size, gfp_t flags, int node);
-+extern void *kvmalloc_node(size_t size, gfp_t flags, int node) __attribute__((alloc_size(1)));
- static inline void *kvmalloc(size_t size, gfp_t flags)
- {
- return kvmalloc_node(size, flags, NUMA_NO_NODE);
-diff -Naur linux-4.16/include/linux/percpu.h linux-4.16h-for-v3/include/linux/percpu.h
---- linux-4.16/include/linux/percpu.h 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/include/linux/percpu.h 2018-04-11 22:38:06.408995018 +0200
-@@ -129,7 +129,7 @@
- pcpu_fc_populate_pte_fn_t populate_pte_fn);
- #endif
-
--extern void __percpu *__alloc_reserved_percpu(size_t size, size_t align);
-+extern void __percpu *__alloc_reserved_percpu(size_t size, size_t align) __attribute__((alloc_size(1)));
- extern bool __is_kernel_percpu_address(unsigned long addr, unsigned long *can_addr);
- extern bool is_kernel_percpu_address(unsigned long addr);
-
-@@ -137,8 +137,8 @@
- extern void __init setup_per_cpu_areas(void);
- #endif
-
--extern void __percpu *__alloc_percpu_gfp(size_t size, size_t align, gfp_t gfp);
--extern void __percpu *__alloc_percpu(size_t size, size_t align);
-+extern void __percpu *__alloc_percpu_gfp(size_t size, size_t align, gfp_t gfp) __attribute__((alloc_size(1)));
-+extern void __percpu *__alloc_percpu(size_t size, size_t align) __attribute__((alloc_size(1)));
- extern void free_percpu(void __percpu *__pdata);
- extern phys_addr_t per_cpu_ptr_to_phys(void *addr);
-
-diff -Naur linux-4.16/include/linux/perf_event.h linux-4.16h-for-v3/include/linux/perf_event.h
---- linux-4.16/include/linux/perf_event.h 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/include/linux/perf_event.h 2018-04-11 22:38:06.408995018 +0200
-@@ -1151,6 +1151,11 @@
- int perf_event_max_stack_handler(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos);
-
-+static inline bool perf_paranoid_any(void)
-+{
-+ return sysctl_perf_event_paranoid > 2;
-+}
-+
- static inline bool perf_paranoid_tracepoint_raw(void)
- {
- return sysctl_perf_event_paranoid > -1;
-diff -Naur linux-4.16/include/linux/slab.h linux-4.16h-for-v3/include/linux/slab.h
---- linux-4.16/include/linux/slab.h 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/include/linux/slab.h 2018-04-11 22:38:06.409994645 +0200
-@@ -177,8 +177,8 @@
- /*
- * Common kmalloc functions provided by all allocators
- */
--void * __must_check __krealloc(const void *, size_t, gfp_t);
--void * __must_check krealloc(const void *, size_t, gfp_t);
-+void * __must_check __krealloc(const void *, size_t, gfp_t) __attribute__((alloc_size(2)));
-+void * __must_check krealloc(const void *, size_t, gfp_t) __attribute((alloc_size(2)));
- void kfree(const void *);
- void kzfree(const void *);
- size_t ksize(const void *);
-@@ -351,7 +351,7 @@
- }
- #endif /* !CONFIG_SLOB */
-
--void *__kmalloc(size_t size, gfp_t flags) __assume_kmalloc_alignment __malloc;
-+void *__kmalloc(size_t size, gfp_t flags) __assume_kmalloc_alignment __malloc __attribute__((alloc_size(1)));
- void *kmem_cache_alloc(struct kmem_cache *, gfp_t flags) __assume_slab_alignment __malloc;
- void kmem_cache_free(struct kmem_cache *, void *);
-
-@@ -375,7 +375,7 @@
- }
-
- #ifdef CONFIG_NUMA
--void *__kmalloc_node(size_t size, gfp_t flags, int node) __assume_kmalloc_alignment __malloc;
-+void *__kmalloc_node(size_t size, gfp_t flags, int node) __assume_kmalloc_alignment __malloc __attribute__((alloc_size(1)));
- void *kmem_cache_alloc_node(struct kmem_cache *, gfp_t flags, int node) __assume_slab_alignment __malloc;
- #else
- static __always_inline void *__kmalloc_node(size_t size, gfp_t flags, int node)
-@@ -497,7 +497,7 @@
- * for general use, and so are not documented here. For a full list of
- * potential flags, always refer to linux/gfp.h.
- */
--static __always_inline void *kmalloc(size_t size, gfp_t flags)
-+static __always_inline __attribute__((alloc_size(1))) void *kmalloc(size_t size, gfp_t flags)
- {
- if (__builtin_constant_p(size)) {
- if (size > KMALLOC_MAX_CACHE_SIZE)
-@@ -537,7 +537,7 @@
- return 0;
- }
-
--static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node)
-+static __always_inline __attribute__((alloc_size(1))) void *kmalloc_node(size_t size, gfp_t flags, int node)
- {
- #ifndef CONFIG_SLOB
- if (__builtin_constant_p(size) &&
-diff -Naur linux-4.16/include/linux/slub_def.h linux-4.16h-for-v3/include/linux/slub_def.h
---- linux-4.16/include/linux/slub_def.h 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/include/linux/slub_def.h 2018-04-11 22:38:06.409994645 +0200
-@@ -120,6 +120,11 @@
- unsigned long random;
- #endif
-
-+#ifdef CONFIG_SLAB_CANARY
-+ unsigned long random_active;
-+ unsigned long random_inactive;
-+#endif
-+
- #ifdef CONFIG_NUMA
- /*
- * Defragmentation by allocating from a remote node.
-diff -Naur linux-4.16/include/linux/string.h linux-4.16h-for-v3/include/linux/string.h
---- linux-4.16/include/linux/string.h 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/include/linux/string.h 2018-04-11 22:38:06.409994645 +0200
-@@ -235,10 +235,16 @@
- void __read_overflow3(void) __compiletime_error("detected read beyond size of object passed as 3rd parameter");
- void __write_overflow(void) __compiletime_error("detected write beyond size of object passed as 1st parameter");
-
-+#ifdef CONFIG_FORTIFY_SOURCE_STRICT_STRING
-+#define __string_size(p) __builtin_object_size(p, 1)
-+#else
-+#define __string_size(p) __builtin_object_size(p, 0)
-+#endif
-+
- #if !defined(__NO_FORTIFY) && defined(__OPTIMIZE__) && defined(CONFIG_FORTIFY_SOURCE)
- __FORTIFY_INLINE char *strncpy(char *p, const char *q, __kernel_size_t size)
- {
-- size_t p_size = __builtin_object_size(p, 0);
-+ size_t p_size = __string_size(p);
- if (__builtin_constant_p(size) && p_size < size)
- __write_overflow();
- if (p_size < size)
-@@ -248,7 +254,7 @@
-
- __FORTIFY_INLINE char *strcat(char *p, const char *q)
- {
-- size_t p_size = __builtin_object_size(p, 0);
-+ size_t p_size = __string_size(p);
- if (p_size == (size_t)-1)
- return __builtin_strcat(p, q);
- if (strlcat(p, q, p_size) >= p_size)
-@@ -259,7 +265,7 @@
- __FORTIFY_INLINE __kernel_size_t strlen(const char *p)
- {
- __kernel_size_t ret;
-- size_t p_size = __builtin_object_size(p, 0);
-+ size_t p_size = __string_size(p);
-
- /* Work around gcc excess stack consumption issue */
- if (p_size == (size_t)-1 ||
-@@ -274,7 +280,7 @@
- extern __kernel_size_t __real_strnlen(const char *, __kernel_size_t) __RENAME(strnlen);
- __FORTIFY_INLINE __kernel_size_t strnlen(const char *p, __kernel_size_t maxlen)
- {
-- size_t p_size = __builtin_object_size(p, 0);
-+ size_t p_size = __string_size(p);
- __kernel_size_t ret = __real_strnlen(p, maxlen < p_size ? maxlen : p_size);
- if (p_size <= ret && maxlen != ret)
- fortify_panic(__func__);
-@@ -286,8 +292,8 @@
- __FORTIFY_INLINE size_t strlcpy(char *p, const char *q, size_t size)
- {
- size_t ret;
-- size_t p_size = __builtin_object_size(p, 0);
-- size_t q_size = __builtin_object_size(q, 0);
-+ size_t p_size = __string_size(p);
-+ size_t q_size = __string_size(q);
- if (p_size == (size_t)-1 && q_size == (size_t)-1)
- return __real_strlcpy(p, q, size);
- ret = strlen(q);
-@@ -307,8 +313,8 @@
- __FORTIFY_INLINE char *strncat(char *p, const char *q, __kernel_size_t count)
- {
- size_t p_len, copy_len;
-- size_t p_size = __builtin_object_size(p, 0);
-- size_t q_size = __builtin_object_size(q, 0);
-+ size_t p_size = __string_size(p);
-+ size_t q_size = __string_size(q);
- if (p_size == (size_t)-1 && q_size == (size_t)-1)
- return __builtin_strncat(p, q, count);
- p_len = strlen(p);
-@@ -421,8 +427,8 @@
- /* defined after fortified strlen and memcpy to reuse them */
- __FORTIFY_INLINE char *strcpy(char *p, const char *q)
- {
-- size_t p_size = __builtin_object_size(p, 0);
-- size_t q_size = __builtin_object_size(q, 0);
-+ size_t p_size = __string_size(p);
-+ size_t q_size = __string_size(q);
- if (p_size == (size_t)-1 && q_size == (size_t)-1)
- return __builtin_strcpy(p, q);
- memcpy(p, q, strlen(q) + 1);
-diff -Naur linux-4.16/include/linux/tty.h linux-4.16h-for-v3/include/linux/tty.h
---- linux-4.16/include/linux/tty.h 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/include/linux/tty.h 2018-04-11 22:38:06.409994645 +0200
-@@ -13,6 +13,7 @@
- #include <uapi/linux/tty.h>
- #include <linux/rwsem.h>
- #include <linux/llist.h>
-+#include <linux/user_namespace.h>
-
-
- /*
-@@ -335,6 +336,7 @@
- /* If the tty has a pending do_SAK, queue it here - akpm */
- struct work_struct SAK_work;
- struct tty_port *port;
-+ struct user_namespace *owner_user_ns;
- } __randomize_layout;
-
- /* Each of a tty's open files has private_data pointing to tty_file_private */
-@@ -344,6 +346,8 @@
- struct list_head list;
- };
-
-+extern int tiocsti_restrict;
-+
- /* tty magic number */
- #define TTY_MAGIC 0x5401
-
-diff -Naur linux-4.16/include/linux/vmalloc.h linux-4.16h-for-v3/include/linux/vmalloc.h
---- linux-4.16/include/linux/vmalloc.h 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/include/linux/vmalloc.h 2018-04-11 22:38:06.409994645 +0200
-@@ -68,19 +68,19 @@
- }
- #endif
-
--extern void *vmalloc(unsigned long size);
--extern void *vzalloc(unsigned long size);
--extern void *vmalloc_user(unsigned long size);
--extern void *vmalloc_node(unsigned long size, int node);
--extern void *vzalloc_node(unsigned long size, int node);
--extern void *vmalloc_exec(unsigned long size);
--extern void *vmalloc_32(unsigned long size);
--extern void *vmalloc_32_user(unsigned long size);
--extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot);
-+extern void *vmalloc(unsigned long size) __attribute__((alloc_size(1)));
-+extern void *vzalloc(unsigned long size) __attribute__((alloc_size(1)));
-+extern void *vmalloc_user(unsigned long size) __attribute__((alloc_size(1)));
-+extern void *vmalloc_node(unsigned long size, int node) __attribute__((alloc_size(1)));
-+extern void *vzalloc_node(unsigned long size, int node) __attribute__((alloc_size(1)));
-+extern void *vmalloc_exec(unsigned long size) __attribute__((alloc_size(1)));
-+extern void *vmalloc_32(unsigned long size) __attribute__((alloc_size(1)));
-+extern void *vmalloc_32_user(unsigned long size) __attribute__((alloc_size(1)));
-+extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot) __attribute__((alloc_size(1)));
- extern void *__vmalloc_node_range(unsigned long size, unsigned long align,
- unsigned long start, unsigned long end, gfp_t gfp_mask,
- pgprot_t prot, unsigned long vm_flags, int node,
-- const void *caller);
-+ const void *caller) __attribute__((alloc_size(1)));
- #ifndef CONFIG_MMU
- extern void *__vmalloc_node_flags(unsigned long size, int node, gfp_t flags);
- static inline void *__vmalloc_node_flags_caller(unsigned long size, int node,
-diff -Naur linux-4.16/init/Kconfig linux-4.16h-for-v3/init/Kconfig
---- linux-4.16/init/Kconfig 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/init/Kconfig 2018-04-11 22:38:06.410994273 +0200
-@@ -296,6 +296,7 @@
- config AUDIT
- bool "Auditing support"
- depends on NET
-+ default y
- help
- Enable auditing infrastructure that can be used with another
- kernel subsystem, such as SELinux (which requires this for
-@@ -1039,6 +1040,12 @@
-
- endchoice
-
-+config LOCAL_INIT
-+ bool "Zero uninitialized locals"
-+ help
-+ Zero-fill uninitialized local variables, other than variable-length
-+ arrays. Requires compiler support.
-+
- config SYSCTL
- bool
-
-@@ -1296,8 +1303,7 @@
- which may be appropriate on small systems without swap.
-
- config AIO
-- bool "Enable AIO support" if EXPERT
-- default y
-+ bool "Enable AIO support"
- help
- This option enables POSIX asynchronous I/O which may by used
- by some high performance threaded applications. Disabling
-@@ -1502,7 +1508,7 @@
-
- config SLUB_DEBUG
- default y
-- bool "Enable SLUB debugging support" if EXPERT
-+ bool "Enable SLUB debugging support"
- depends on SLUB && SYSFS
- help
- SLUB has extensive debug support features. Disabling these can
-@@ -1526,7 +1532,6 @@
-
- config COMPAT_BRK
- bool "Disable heap randomization"
-- default y
- help
- Randomizing heap placement makes heap exploits harder, but it
- also breaks ancient binaries (including anything libc5 based).
-@@ -1573,7 +1578,6 @@
-
- config SLAB_MERGE_DEFAULT
- bool "Allow slab caches to be merged"
-- default y
- help
- For reduced kernel memory fragmentation, slab caches can be
- merged when they share the same size and other characteristics.
-@@ -1586,9 +1590,9 @@
- command line.
-
- config SLAB_FREELIST_RANDOM
-- default n
- depends on SLAB || SLUB
- bool "SLAB freelist randomization"
-+ default y
- help
- Randomizes the freelist order used on creating new pages. This
- security feature reduces the predictability of the kernel slab
-@@ -1597,12 +1601,56 @@
- config SLAB_FREELIST_HARDENED
- bool "Harden slab freelist metadata"
- depends on SLUB
-+ default y
- help
- Many kernel heap attacks try to target slab cache metadata and
- other infrastructure. This options makes minor performance
- sacrifies to harden the kernel slab allocator against common
- freelist exploit methods.
-
-+config SLAB_HARDENED
-+ default y
-+ depends on SLUB
-+ bool "Hardened SLAB infrastructure"
-+ help
-+ Make minor performance sacrifices to harden the kernel slab
-+ allocator.
-+
-+config SLAB_CANARY
-+ depends on SLUB
-+ depends on !SLAB_MERGE_DEFAULT
-+ bool "SLAB canaries"
-+ default y
-+ help
-+ Place canaries at the end of kernel slab allocations, sacrificing
-+ some performance and memory usage for security.
-+
-+ Canaries can detect some forms of heap corruption when allocations
-+ are freed and as part of the HARDENED_USERCOPY feature. It provides
-+ basic use-after-free detection for HARDENED_USERCOPY.
-+
-+ Canaries absorb small overflows (rendering them harmless), mitigate
-+ non-NUL terminated C string overflows on 64-bit via a guaranteed zero
-+ byte and provide basic double-free detection.
-+
-+config SLAB_SANITIZE
-+ bool "Sanitize SLAB allocations"
-+ depends on SLUB
-+ default y
-+ help
-+ Zero fill slab allocations on free, reducing the lifetime of
-+ sensitive data and helping to mitigate use-after-free bugs.
-+
-+ For slabs with debug poisoning enabling, this has no impact.
-+
-+config SLAB_SANITIZE_VERIFY
-+ depends on SLAB_SANITIZE && PAGE_SANITIZE
-+ default y
-+ bool "Verify sanitized SLAB allocations"
-+ help
-+ Verify that newly allocated slab allocations are zeroed to detect
-+ write-after-free bugs.
-+
- config SLUB_CPU_PARTIAL
- default y
- depends on SLUB && SMP
-diff -Naur linux-4.16/kernel/audit.c linux-4.16h-for-v3/kernel/audit.c
---- linux-4.16/kernel/audit.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/kernel/audit.c 2018-04-11 22:38:06.410994273 +0200
-@@ -1578,6 +1578,9 @@
-
- if (audit_default == AUDIT_OFF)
- audit_initialized = AUDIT_DISABLED;
-+ else if (!audit_ever_enabled)
-+ audit_initialized = AUDIT_UNINITIALIZED;
-+
- if (audit_set_enabled(audit_default))
- panic("audit: error setting audit state (%d)\n", audit_default);
-
-diff -Naur linux-4.16/kernel/capability.c linux-4.16h-for-v3/kernel/capability.c
---- linux-4.16/kernel/capability.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/kernel/capability.c 2018-04-11 22:38:06.410994273 +0200
-@@ -431,6 +431,12 @@
- return ns_capable(&init_user_ns, cap);
- }
- EXPORT_SYMBOL(capable);
-+
-+bool capable_noaudit(int cap)
-+{
-+ return ns_capable_noaudit(&init_user_ns, cap);
-+}
-+EXPORT_SYMBOL(capable_noaudit);
- #endif /* CONFIG_MULTIUSER */
-
- /**
-diff -Naur linux-4.16/kernel/events/core.c linux-4.16h-for-v3/kernel/events/core.c
---- linux-4.16/kernel/events/core.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/kernel/events/core.c 2018-04-11 22:38:06.411993900 +0200
-@@ -397,8 +397,13 @@
- * 0 - disallow raw tracepoint access for unpriv
- * 1 - disallow cpu events for unpriv
- * 2 - disallow kernel profiling for unpriv
-+ * 3 - disallow all unpriv perf event use
- */
-+#ifdef CONFIG_SECURITY_PERF_EVENTS_RESTRICT
-+int sysctl_perf_event_paranoid __read_mostly = 3;
-+#else
- int sysctl_perf_event_paranoid __read_mostly = 2;
-+#endif
-
- /* Minimum for 512 kiB + 1 user control page */
- int sysctl_perf_event_mlock __read_mostly = 512 + (PAGE_SIZE / 1024); /* 'free' kiB per user */
-@@ -9915,6 +9920,9 @@
- if (flags & ~PERF_FLAG_ALL)
- return -EINVAL;
-
-+ if (perf_paranoid_any() && !capable(CAP_SYS_ADMIN))
-+ return -EACCES;
-+
- err = perf_copy_attr(attr_uptr, &attr);
- if (err)
- return err;
-diff -Naur linux-4.16/kernel/fork.c linux-4.16h-for-v3/kernel/fork.c
---- linux-4.16/kernel/fork.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/kernel/fork.c 2018-04-11 22:38:06.411993900 +0200
-@@ -103,6 +103,11 @@
-
- #define CREATE_TRACE_POINTS
- #include <trace/events/task.h>
-+#ifdef CONFIG_USER_NS
-+extern int unprivileged_userns_clone;
-+#else
-+#define unprivileged_userns_clone 0
-+#endif
-
- /*
- * Minimum number of threads to boot the kernel
-@@ -1591,6 +1596,10 @@
- if ((clone_flags & (CLONE_NEWUSER|CLONE_FS)) == (CLONE_NEWUSER|CLONE_FS))
- return ERR_PTR(-EINVAL);
-
-+ if ((clone_flags & CLONE_NEWUSER) && !unprivileged_userns_clone)
-+ if (!capable(CAP_SYS_ADMIN))
-+ return ERR_PTR(-EPERM);
-+
- /*
- * Thread groups must share signals as well, and detached threads
- * can only be started up within the thread group.
-@@ -2385,6 +2394,12 @@
- if (unshare_flags & CLONE_NEWNS)
- unshare_flags |= CLONE_FS;
-
-+ if ((unshare_flags & CLONE_NEWUSER) && !unprivileged_userns_clone) {
-+ err = -EPERM;
-+ if (!capable(CAP_SYS_ADMIN))
-+ goto bad_unshare_out;
-+ }
-+
- err = check_unshare_flags(unshare_flags);
- if (err)
- goto bad_unshare_out;
-diff -Naur linux-4.16/kernel/power/snapshot.c linux-4.16h-for-v3/kernel/power/snapshot.c
---- linux-4.16/kernel/power/snapshot.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/kernel/power/snapshot.c 2018-04-11 22:38:06.412993528 +0200
-@@ -1138,7 +1138,7 @@
-
- void clear_free_pages(void)
- {
--#ifdef CONFIG_PAGE_POISONING_ZERO
-+#if defined(CONFIG_PAGE_POISONING_ZERO) || defined(CONFIG_PAGE_SANITIZE)
- struct memory_bitmap *bm = free_pages_map;
- unsigned long pfn;
-
-@@ -1155,7 +1155,7 @@
- }
- memory_bm_position_reset(bm);
- pr_info("free pages cleared after restore\n");
--#endif /* PAGE_POISONING_ZERO */
-+#endif /* PAGE_POISONING_ZERO || PAGE_SANITIZE */
- }
-
- /**
-diff -Naur linux-4.16/kernel/rcu/tiny.c linux-4.16h-for-v3/kernel/rcu/tiny.c
---- linux-4.16/kernel/rcu/tiny.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/kernel/rcu/tiny.c 2018-04-11 22:38:06.412993528 +0200
-@@ -164,7 +164,7 @@
- }
- }
-
--static __latent_entropy void rcu_process_callbacks(struct softirq_action *unused)
-+static __latent_entropy void rcu_process_callbacks(void)
- {
- __rcu_process_callbacks(&rcu_sched_ctrlblk);
- __rcu_process_callbacks(&rcu_bh_ctrlblk);
-diff -Naur linux-4.16/kernel/rcu/tree.c linux-4.16h-for-v3/kernel/rcu/tree.c
---- linux-4.16/kernel/rcu/tree.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/kernel/rcu/tree.c 2018-04-11 22:38:06.412993528 +0200
-@@ -2906,7 +2906,7 @@
- /*
- * Do RCU core processing for the current CPU.
- */
--static __latent_entropy void rcu_process_callbacks(struct softirq_action *unused)
-+static __latent_entropy void rcu_process_callbacks(void)
- {
- struct rcu_state *rsp;
-
-diff -Naur linux-4.16/kernel/sched/fair.c linux-4.16h-for-v3/kernel/sched/fair.c
---- linux-4.16/kernel/sched/fair.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/kernel/sched/fair.c 2018-04-11 22:38:06.413993156 +0200
-@@ -9387,7 +9387,7 @@
- * run_rebalance_domains is triggered when needed from the scheduler tick.
- * Also triggered for nohz idle balancing (with nohz_balancing_kick set).
- */
--static __latent_entropy void run_rebalance_domains(struct softirq_action *h)
-+static __latent_entropy void run_rebalance_domains(void)
- {
- struct rq *this_rq = this_rq();
- enum cpu_idle_type idle = this_rq->idle_balance ?
-diff -Naur linux-4.16/kernel/softirq.c linux-4.16h-for-v3/kernel/softirq.c
---- linux-4.16/kernel/softirq.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/kernel/softirq.c 2018-04-11 22:38:06.413993156 +0200
-@@ -53,7 +53,7 @@
- EXPORT_SYMBOL(irq_stat);
- #endif
-
--static struct softirq_action softirq_vec[NR_SOFTIRQS] __cacheline_aligned_in_smp;
-+static struct softirq_action softirq_vec[NR_SOFTIRQS] __ro_after_init __aligned(PAGE_SIZE);
-
- DEFINE_PER_CPU(struct task_struct *, ksoftirqd);
-
-@@ -282,7 +282,7 @@
- kstat_incr_softirqs_this_cpu(vec_nr);
-
- trace_softirq_entry(vec_nr);
-- h->action(h);
-+ h->action();
- trace_softirq_exit(vec_nr);
- if (unlikely(prev_count != preempt_count())) {
- pr_err("huh, entered softirq %u %s %p with preempt_count %08x, exited with %08x?\n",
-@@ -444,7 +444,7 @@
- or_softirq_pending(1UL << nr);
- }
-
--void open_softirq(int nr, void (*action)(struct softirq_action *))
-+void __init open_softirq(int nr, void (*action)(void))
- {
- softirq_vec[nr].action = action;
- }
-@@ -486,7 +486,7 @@
- }
- EXPORT_SYMBOL(__tasklet_hi_schedule);
-
--static __latent_entropy void tasklet_action(struct softirq_action *a)
-+static __latent_entropy void tasklet_action(void)
- {
- struct tasklet_struct *list;
-
-@@ -522,7 +522,7 @@
- }
- }
-
--static __latent_entropy void tasklet_hi_action(struct softirq_action *a)
-+static __latent_entropy void tasklet_hi_action(void)
- {
- struct tasklet_struct *list;
-
-diff -Naur linux-4.16/kernel/sysctl.c linux-4.16h-for-v3/kernel/sysctl.c
---- linux-4.16/kernel/sysctl.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/kernel/sysctl.c 2018-04-11 22:38:06.414992783 +0200
-@@ -67,6 +67,7 @@
- #include <linux/bpf.h>
- #include <linux/mount.h>
- #include <linux/pipe_fs_i.h>
-+#include <linux/tty.h>
-
- #include <linux/uaccess.h>
- #include <asm/processor.h>
-@@ -99,12 +100,19 @@
- #if defined(CONFIG_SYSCTL)
-
- /* External variables not in a header file. */
-+#if IS_ENABLED(CONFIG_USB)
-+int deny_new_usb __read_mostly = 0;
-+EXPORT_SYMBOL(deny_new_usb);
-+#endif
- extern int suid_dumpable;
- #ifdef CONFIG_COREDUMP
- extern int core_uses_pid;
- extern char core_pattern[];
- extern unsigned int core_pipe_limit;
- #endif
-+#ifdef CONFIG_USER_NS
-+extern int unprivileged_userns_clone;
-+#endif
- extern int pid_max;
- extern int pid_max_min, pid_max_max;
- extern int percpu_pagelist_fraction;
-@@ -116,40 +124,43 @@
-
- /* Constants used for minimum and maximum */
- #ifdef CONFIG_LOCKUP_DETECTOR
--static int sixty = 60;
-+static int sixty __read_only = 60;
- #endif
-
--static int __maybe_unused neg_one = -1;
-+static int __maybe_unused neg_one __read_only = -1;
-
- static int zero;
--static int __maybe_unused one = 1;
--static int __maybe_unused two = 2;
--static int __maybe_unused four = 4;
--static unsigned long one_ul = 1;
--static int one_hundred = 100;
--static int one_thousand = 1000;
-+static int __maybe_unused one __read_only = 1;
-+static int __maybe_unused two __read_only = 2;
-+static int __maybe_unused four __read_only = 4;
-+static unsigned long one_ul __read_only = 1;
-+static int one_hundred __read_only = 100;
-+static int one_thousand __read_only = 1000;
- #ifdef CONFIG_PRINTK
--static int ten_thousand = 10000;
-+static int ten_thousand __read_only = 10000;
- #endif
- #ifdef CONFIG_PERF_EVENTS
--static int six_hundred_forty_kb = 640 * 1024;
-+static int six_hundred_forty_kb __read_only = 640 * 1024;
- #endif
-
- /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */
--static unsigned long dirty_bytes_min = 2 * PAGE_SIZE;
-+static unsigned long dirty_bytes_min __read_only = 2 * PAGE_SIZE;
-
- /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */
--static int maxolduid = 65535;
--static int minolduid;
-+static int maxolduid __read_only = 65535;
-+static int minolduid __read_only;
-
--static int ngroups_max = NGROUPS_MAX;
-+static int ngroups_max __read_only = NGROUPS_MAX;
- static const int cap_last_cap = CAP_LAST_CAP;
-
- /*this is needed for proc_doulongvec_minmax of sysctl_hung_task_timeout_secs */
- #ifdef CONFIG_DETECT_HUNG_TASK
--static unsigned long hung_task_timeout_max = (LONG_MAX/HZ);
-+static unsigned long hung_task_timeout_max __read_only = (LONG_MAX/HZ);
- #endif
-
-+int device_sidechannel_restrict __read_mostly = 1;
-+EXPORT_SYMBOL(device_sidechannel_restrict);
-+
- #ifdef CONFIG_INOTIFY_USER
- #include <linux/inotify.h>
- #endif
-@@ -289,19 +300,19 @@
- };
-
- #ifdef CONFIG_SCHED_DEBUG
--static int min_sched_granularity_ns = 100000; /* 100 usecs */
--static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */
--static int min_wakeup_granularity_ns; /* 0 usecs */
--static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */
-+static int min_sched_granularity_ns __read_only = 100000; /* 100 usecs */
-+static int max_sched_granularity_ns __read_only = NSEC_PER_SEC; /* 1 second */
-+static int min_wakeup_granularity_ns __read_only; /* 0 usecs */
-+static int max_wakeup_granularity_ns __read_only = NSEC_PER_SEC; /* 1 second */
- #ifdef CONFIG_SMP
--static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE;
--static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1;
-+static int min_sched_tunable_scaling __read_only = SCHED_TUNABLESCALING_NONE;
-+static int max_sched_tunable_scaling __read_only = SCHED_TUNABLESCALING_END-1;
- #endif /* CONFIG_SMP */
- #endif /* CONFIG_SCHED_DEBUG */
-
- #ifdef CONFIG_COMPACTION
--static int min_extfrag_threshold;
--static int max_extfrag_threshold = 1000;
-+static int min_extfrag_threshold __read_only;
-+static int max_extfrag_threshold __read_only = 1000;
- #endif
-
- static struct ctl_table kern_table[] = {
-@@ -515,6 +526,15 @@
- .proc_handler = proc_dointvec,
- },
- #endif
-+#ifdef CONFIG_USER_NS
-+ {
-+ .procname = "unprivileged_userns_clone",
-+ .data = &unprivileged_userns_clone,
-+ .maxlen = sizeof(int),
-+ .mode = 0644,
-+ .proc_handler = proc_dointvec,
-+ },
-+#endif
- #ifdef CONFIG_PROC_SYSCTL
- {
- .procname = "tainted",
-@@ -857,6 +877,37 @@
- .extra2 = &two,
- },
- #endif
-+#if defined CONFIG_TTY
-+ {
-+ .procname = "tiocsti_restrict",
-+ .data = &tiocsti_restrict,
-+ .maxlen = sizeof(int),
-+ .mode = 0644,
-+ .proc_handler = proc_dointvec_minmax_sysadmin,
-+ .extra1 = &zero,
-+ .extra2 = &one,
-+ },
-+#endif
-+ {
-+ .procname = "device_sidechannel_restrict",
-+ .data = &device_sidechannel_restrict,
-+ .maxlen = sizeof(int),
-+ .mode = 0644,
-+ .proc_handler = proc_dointvec_minmax_sysadmin,
-+ .extra1 = &zero,
-+ .extra2 = &one,
-+ },
-+#if IS_ENABLED(CONFIG_USB)
-+ {
-+ .procname = "deny_new_usb",
-+ .data = &deny_new_usb,
-+ .maxlen = sizeof(int),
-+ .mode = 0644,
-+ .proc_handler = proc_dointvec_minmax_sysadmin,
-+ .extra1 = &zero,
-+ .extra2 = &one,
-+ },
-+#endif
- {
- .procname = "ngroups_max",
- .data = &ngroups_max,
-diff -Naur linux-4.16/kernel/time/timer.c linux-4.16h-for-v3/kernel/time/timer.c
---- linux-4.16/kernel/time/timer.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/kernel/time/timer.c 2018-04-11 22:38:06.414992783 +0200
-@@ -1672,7 +1672,7 @@
- /*
- * This function runs timers and the timer-tq in bottom half context.
- */
--static __latent_entropy void run_timer_softirq(struct softirq_action *h)
-+static __latent_entropy void run_timer_softirq(void)
- {
- struct timer_base *base = this_cpu_ptr(&timer_bases[BASE_STD]);
-
-diff -Naur linux-4.16/kernel/user_namespace.c linux-4.16h-for-v3/kernel/user_namespace.c
---- linux-4.16/kernel/user_namespace.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/kernel/user_namespace.c 2018-04-11 22:38:06.414992783 +0200
-@@ -26,6 +26,9 @@
- #include <linux/bsearch.h>
- #include <linux/sort.h>
-
-+/* sysctl */
-+int unprivileged_userns_clone;
-+
- static struct kmem_cache *user_ns_cachep __read_mostly;
- static DEFINE_MUTEX(userns_state_mutex);
-
-diff -Naur linux-4.16/lib/irq_poll.c linux-4.16h-for-v3/lib/irq_poll.c
---- linux-4.16/lib/irq_poll.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/lib/irq_poll.c 2018-04-11 22:38:06.415992411 +0200
-@@ -75,7 +75,7 @@
- }
- EXPORT_SYMBOL(irq_poll_complete);
-
--static void __latent_entropy irq_poll_softirq(struct softirq_action *h)
-+static void __latent_entropy irq_poll_softirq(void)
- {
- struct list_head *list = this_cpu_ptr(&blk_cpu_iopoll);
- int rearm = 0, budget = irq_poll_budget;
-diff -Naur linux-4.16/lib/Kconfig.debug linux-4.16h-for-v3/lib/Kconfig.debug
---- linux-4.16/lib/Kconfig.debug 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/lib/Kconfig.debug 2018-04-11 22:47:48.922028611 +0200
-@@ -945,6 +945,7 @@
-
- config PANIC_ON_OOPS
- bool "Panic on Oops"
-+ default y
- help
- Say Y here to enable the kernel to panic when it oopses. This
- has the same effect as setting oops=panic on the kernel command
-@@ -954,7 +955,7 @@
- anything erroneous after an oops which could result in data
- corruption or other issues.
-
-- Say N if unsure.
-+ Say Y if unsure.
-
- config PANIC_ON_OOPS_VALUE
- int
-@@ -1309,6 +1310,7 @@
- config DEBUG_LIST
- bool "Debug linked list manipulation"
- depends on DEBUG_KERNEL || BUG_ON_DATA_CORRUPTION
-+ default y
- help
- Enable this to turn on extended checks in the linked-list
- walking routines.
-@@ -1949,6 +1951,7 @@
- config BUG_ON_DATA_CORRUPTION
- bool "Trigger a BUG when data corruption is detected"
- select DEBUG_LIST
-+ default y
- help
- Select this option if the kernel should BUG when it encounters
- data corruption in kernel memory structures when they get checked
-@@ -1988,6 +1991,7 @@
- config IO_STRICT_DEVMEM
- bool "Filter I/O access to /dev/mem"
- depends on STRICT_DEVMEM
-+ default y
- ---help---
- If this option is disabled, you allow userspace (root) access to all
- io-memory regardless of whether a driver is actively using that
-diff -Naur linux-4.16/lib/kobject.c linux-4.16h-for-v3/lib/kobject.c
---- linux-4.16/lib/kobject.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/lib/kobject.c 2018-04-11 22:38:06.415992411 +0200
-@@ -956,9 +956,9 @@
-
-
- static DEFINE_SPINLOCK(kobj_ns_type_lock);
--static const struct kobj_ns_type_operations *kobj_ns_ops_tbl[KOBJ_NS_TYPES];
-+static const struct kobj_ns_type_operations *kobj_ns_ops_tbl[KOBJ_NS_TYPES] __ro_after_init;
-
--int kobj_ns_type_register(const struct kobj_ns_type_operations *ops)
-+int __init kobj_ns_type_register(const struct kobj_ns_type_operations *ops)
- {
- enum kobj_ns_type type = ops->type;
- int error;
-diff -Naur linux-4.16/lib/nlattr.c linux-4.16h-for-v3/lib/nlattr.c
---- linux-4.16/lib/nlattr.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/lib/nlattr.c 2018-04-11 22:38:06.415992411 +0200
-@@ -364,6 +364,8 @@
- {
- int minlen = min_t(int, count, nla_len(src));
-
-+ BUG_ON(minlen < 0);
-+
- memcpy(dest, nla_data(src), minlen);
- if (count > minlen)
- memset(dest + minlen, 0, count - minlen);
-diff -Naur linux-4.16/lib/vsprintf.c linux-4.16h-for-v3/lib/vsprintf.c
---- linux-4.16/lib/vsprintf.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/lib/vsprintf.c 2018-04-11 22:38:06.415992411 +0200
-@@ -1344,7 +1344,7 @@
- return string(buf, end, uuid, spec);
- }
-
--int kptr_restrict __read_mostly;
-+int kptr_restrict __read_mostly = 2;
-
- static noinline_for_stack
- char *restricted_pointer(char *buf, char *end, const void *ptr,
-diff -Naur linux-4.16/Makefile linux-4.16h-for-v3/Makefile
---- linux-4.16/Makefile 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/Makefile 2018-04-11 22:38:06.398998742 +0200
-@@ -734,6 +734,9 @@
- endif
-
- ifeq ($(cc-name),clang)
-+ifdef CONFIG_LOCAL_INIT
-+KBUILD_CFLAGS += -fsanitize=local-init
-+endif
- KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
- KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
- KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
-diff -Naur linux-4.16/mm/Kconfig linux-4.16h-for-v3/mm/Kconfig
---- linux-4.16/mm/Kconfig 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/mm/Kconfig 2018-04-11 22:38:06.416992038 +0200
-@@ -319,7 +319,8 @@
- config DEFAULT_MMAP_MIN_ADDR
- int "Low address space to protect from user allocation"
- depends on MMU
-- default 4096
-+ default 32768 if ARM || (ARM64 && COMPAT)
-+ default 65536
- help
- This is the portion of low virtual memory which should be protected
- from userspace allocation. Keeping a user from writing to low pages
-diff -Naur linux-4.16/mm/mmap.c linux-4.16h-for-v3/mm/mmap.c
---- linux-4.16/mm/mmap.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/mm/mmap.c 2018-04-11 22:38:06.416992038 +0200
-@@ -220,6 +220,13 @@
-
- newbrk = PAGE_ALIGN(brk);
- oldbrk = PAGE_ALIGN(mm->brk);
-+ /* properly handle unaligned min_brk as an empty heap */
-+ if (min_brk & ~PAGE_MASK) {
-+ if (brk == min_brk)
-+ newbrk -= PAGE_SIZE;
-+ if (mm->brk == min_brk)
-+ oldbrk -= PAGE_SIZE;
-+ }
- if (oldbrk == newbrk)
- goto set_brk;
-
-diff -Naur linux-4.16/mm/page_alloc.c linux-4.16h-for-v3/mm/page_alloc.c
---- linux-4.16/mm/page_alloc.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/mm/page_alloc.c 2018-04-11 22:38:06.417991666 +0200
-@@ -68,6 +68,7 @@
- #include <linux/ftrace.h>
- #include <linux/lockdep.h>
- #include <linux/nmi.h>
-+#include <linux/random.h>
-
- #include <asm/sections.h>
- #include <asm/tlbflush.h>
-@@ -101,6 +102,15 @@
- DEFINE_MUTEX(pcpu_drain_mutex);
- DEFINE_PER_CPU(struct work_struct, pcpu_drain);
-
-+bool __meminitdata extra_latent_entropy;
-+
-+static int __init setup_extra_latent_entropy(char *str)
-+{
-+ extra_latent_entropy = true;
-+ return 0;
-+}
-+early_param("extra_latent_entropy", setup_extra_latent_entropy);
-+
- #ifdef CONFIG_GCC_PLUGIN_LATENT_ENTROPY
- volatile unsigned long latent_entropy __latent_entropy;
- EXPORT_SYMBOL(latent_entropy);
-@@ -1069,6 +1079,13 @@
- debug_check_no_obj_freed(page_address(page),
- PAGE_SIZE << order);
- }
-+
-+ if (IS_ENABLED(CONFIG_PAGE_SANITIZE)) {
-+ int i;
-+ for (i = 0; i < (1 << order); i++)
-+ clear_highpage(page + i);
-+ }
-+
- arch_free_page(page, order);
- kernel_poison_pages(page, 1 << order, 0);
- kernel_map_pages(page, 1 << order, 0);
-@@ -1286,6 +1303,21 @@
- __ClearPageReserved(p);
- set_page_count(p, 0);
-
-+ if (extra_latent_entropy && !PageHighMem(page) && page_to_pfn(page) < 0x100000) {
-+ unsigned long hash = 0;
-+ size_t index, end = PAGE_SIZE * nr_pages / sizeof hash;
-+ const unsigned long *data = lowmem_page_address(page);
-+
-+ for (index = 0; index < end; index++)
-+ hash ^= hash + data[index];
-+#ifdef CONFIG_GCC_PLUGIN_LATENT_ENTROPY
-+ latent_entropy ^= hash;
-+ add_device_randomness((const void *)&latent_entropy, sizeof(latent_entropy));
-+#else
-+ add_device_randomness((const void *)&hash, sizeof(hash));
-+#endif
-+ }
-+
- page_zone(page)->managed_pages += nr_pages;
- set_page_refcounted(page);
- __free_pages(page, order);
-@@ -1754,8 +1786,8 @@
-
- static inline bool free_pages_prezeroed(void)
- {
-- return IS_ENABLED(CONFIG_PAGE_POISONING_ZERO) &&
-- page_poisoning_enabled();
-+ return IS_ENABLED(CONFIG_PAGE_SANITIZE) ||
-+ (IS_ENABLED(CONFIG_PAGE_POISONING_ZERO) && page_poisoning_enabled());
- }
-
- #ifdef CONFIG_DEBUG_VM
-@@ -1812,6 +1844,11 @@
-
- post_alloc_hook(page, order, gfp_flags);
-
-+ if (IS_ENABLED(CONFIG_PAGE_SANITIZE_VERIFY)) {
-+ for (i = 0; i < (1 << order); i++)
-+ verify_zero_highpage(page + i);
-+ }
-+
- if (!free_pages_prezeroed() && (gfp_flags & __GFP_ZERO))
- for (i = 0; i < (1 << order); i++)
- clear_highpage(page + i);
-diff -Naur linux-4.16/mm/slab_common.c linux-4.16h-for-v3/mm/slab_common.c
---- linux-4.16/mm/slab_common.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/mm/slab_common.c 2018-04-11 22:38:06.417991666 +0200
-@@ -26,10 +26,10 @@
-
- #include "slab.h"
-
--enum slab_state slab_state;
-+enum slab_state slab_state __ro_after_init;
- LIST_HEAD(slab_caches);
- DEFINE_MUTEX(slab_mutex);
--struct kmem_cache *kmem_cache;
-+struct kmem_cache *kmem_cache __ro_after_init;
-
- #ifdef CONFIG_HARDENED_USERCOPY
- bool usercopy_fallback __ro_after_init =
-@@ -57,7 +57,7 @@
- /*
- * Merge control. If this is set then no merging of slab caches will occur.
- */
--static bool slab_nomerge = !IS_ENABLED(CONFIG_SLAB_MERGE_DEFAULT);
-+static bool slab_nomerge __ro_after_init = !IS_ENABLED(CONFIG_SLAB_MERGE_DEFAULT);
-
- static int __init setup_slab_nomerge(char *str)
- {
-@@ -968,7 +968,7 @@
- * of two cache sizes there. The size of larger slabs can be determined using
- * fls.
- */
--static s8 size_index[24] = {
-+static s8 size_index[24] __ro_after_init = {
- 3, /* 8 */
- 4, /* 16 */
- 5, /* 24 */
-diff -Naur linux-4.16/mm/slab.h linux-4.16h-for-v3/mm/slab.h
---- linux-4.16/mm/slab.h 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/mm/slab.h 2018-04-11 22:38:06.417991666 +0200
-@@ -312,7 +312,11 @@
- static inline bool slab_equal_or_root(struct kmem_cache *s,
- struct kmem_cache *p)
- {
-+#ifdef CONFIG_SLAB_HARDENED
-+ return p == s;
-+#else
- return true;
-+#endif
- }
-
- static inline const char *cache_name(struct kmem_cache *s)
-@@ -364,18 +368,26 @@
- * to not do even the assignment. In that case, slab_equal_or_root
- * will also be a constant.
- */
-- if (!memcg_kmem_enabled() &&
-+ if (!IS_ENABLED(CONFIG_SLAB_HARDENED) &&
-+ !memcg_kmem_enabled() &&
- !unlikely(s->flags & SLAB_CONSISTENCY_CHECKS))
- return s;
-
- page = virt_to_head_page(x);
-+#ifdef CONFIG_SLAB_HARDENED
-+ BUG_ON(!PageSlab(page));
-+#endif
- cachep = page->slab_cache;
- if (slab_equal_or_root(cachep, s))
- return cachep;
-
- pr_err("%s: Wrong slab cache. %s but object is from %s\n",
- __func__, s->name, cachep->name);
-+#ifdef CONFIG_BUG_ON_DATA_CORRUPTION
-+ BUG_ON(1);
-+#else
- WARN_ON_ONCE(1);
-+#endif
- return s;
- }
-
-@@ -400,7 +412,7 @@
- * back there or track user information then we can
- * only use the space before that information.
- */
-- if (s->flags & (SLAB_TYPESAFE_BY_RCU | SLAB_STORE_USER))
-+ if ((s->flags & (SLAB_TYPESAFE_BY_RCU | SLAB_STORE_USER)) || IS_ENABLED(CONFIG_SLAB_CANARY))
- return s->inuse;
- /*
- * Else we can use all the padding etc for the allocation
-diff -Naur linux-4.16/mm/slub.c linux-4.16h-for-v3/mm/slub.c
---- linux-4.16/mm/slub.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/mm/slub.c 2018-04-11 22:51:22.852580748 +0200
-@@ -125,6 +125,16 @@
- #endif
- }
-
-+static inline bool has_sanitize(struct kmem_cache *s)
-+{
-+ return IS_ENABLED(CONFIG_SLAB_SANITIZE) && !(s->flags & (SLAB_TYPESAFE_BY_RCU | SLAB_POISON));
-+}
-+
-+static inline bool has_sanitize_verify(struct kmem_cache *s)
-+{
-+ return IS_ENABLED(CONFIG_SLAB_SANITIZE_VERIFY) && has_sanitize(s);
-+}
-+
- void *fixup_red_left(struct kmem_cache *s, void *p)
- {
- if (kmem_cache_debug(s) && s->flags & SLAB_RED_ZONE)
-@@ -299,6 +309,35 @@
- *(void **)freeptr_addr = freelist_ptr(s, fp, freeptr_addr);
- }
-
-+#ifdef CONFIG_SLAB_CANARY
-+static inline unsigned long *get_canary(struct kmem_cache *s, void *object)
-+{
-+ if (s->offset)
-+ return object + s->offset + sizeof(void *);
-+ return object + s->inuse;
-+}
-+
-+static inline unsigned long get_canary_value(const void *canary, unsigned long value)
-+{
-+ return (value ^ (unsigned long)canary) & CANARY_MASK;
-+}
-+
-+static inline void set_canary(struct kmem_cache *s, void *object, unsigned long value)
-+{
-+ unsigned long *canary = get_canary(s, object);
-+ *canary = get_canary_value(canary, value);
-+}
-+
-+static inline void check_canary(struct kmem_cache *s, void *object, unsigned long value)
-+{
-+ unsigned long *canary = get_canary(s, object);
-+ BUG_ON(*canary != get_canary_value(canary, value));
-+}
-+#else
-+#define set_canary(s, object, value)
-+#define check_canary(s, object, value)
-+#endif
-+
- /* Loop over all objects in a slab */
- #define for_each_object(__p, __s, __addr, __objects) \
- for (__p = fixup_red_left(__s, __addr); \
-@@ -486,13 +525,13 @@
- * Debug settings:
- */
- #if defined(CONFIG_SLUB_DEBUG_ON)
--static slab_flags_t slub_debug = DEBUG_DEFAULT_FLAGS;
-+static slab_flags_t slub_debug __ro_after_init = DEBUG_DEFAULT_FLAGS;
- #else
--static slab_flags_t slub_debug;
-+static slab_flags_t slub_debug __ro_after_init;
- #endif
-
--static char *slub_debug_slabs;
--static int disable_higher_order_debug;
-+static char *slub_debug_slabs __ro_after_init;
-+static int disable_higher_order_debug __ro_after_init;
-
- /*
- * slub is about to manipulate internal object metadata. This memory lies
-@@ -552,6 +591,9 @@
- else
- p = object + s->inuse;
-
-+ if (IS_ENABLED(CONFIG_SLAB_CANARY))
-+ p = (void *)p + sizeof(void *);
-+
- return p + alloc;
- }
-
-@@ -690,6 +732,9 @@
- else
- off = s->inuse;
-
-+ if (IS_ENABLED(CONFIG_SLAB_CANARY))
-+ off += sizeof(void *);
-+
- if (s->flags & SLAB_STORE_USER)
- off += 2 * sizeof(struct track);
-
-@@ -819,6 +864,9 @@
- /* Freepointer is placed after the object. */
- off += sizeof(void *);
-
-+ if (IS_ENABLED(CONFIG_SLAB_CANARY))
-+ off += sizeof(void *);
-+
- if (s->flags & SLAB_STORE_USER)
- /* We also have user information there */
- off += 2 * sizeof(struct track);
-@@ -1420,8 +1468,9 @@
- void *object)
- {
- setup_object_debug(s, page, object);
-+ set_canary(s, object, s->random_inactive);
- kasan_init_slab_obj(s, object);
-- if (unlikely(s->ctor)) {
-+ if (unlikely(s->ctor) && !has_sanitize_verify(s)) {
- kasan_unpoison_object_data(s, object);
- s->ctor(object);
- kasan_poison_object_data(s, object);
-@@ -2719,9 +2768,21 @@
- stat(s, ALLOC_FASTPATH);
- }
-
-- if (unlikely(gfpflags & __GFP_ZERO) && object)
-+ if (has_sanitize_verify(s) && object) {
-+ size_t offset = s->offset ? 0 : sizeof(void *);
-+ BUG_ON(memchr_inv(object + offset, 0, s->object_size - offset));
-+ if (s->ctor)
-+ s->ctor(object);
-+ if (unlikely(gfpflags & __GFP_ZERO) && offset)
-+ memset(object, 0, sizeof(void *));
-+ } else if (unlikely(gfpflags & __GFP_ZERO) && object)
- memset(object, 0, s->object_size);
-
-+ if (object) {
-+ check_canary(s, object, s->random_inactive);
-+ set_canary(s, object, s->random_active);
-+ }
-+
- slab_post_alloc_hook(s, gfpflags, 1, &object);
-
- return object;
-@@ -2928,6 +2989,27 @@
- void *tail_obj = tail ? : head;
- struct kmem_cache_cpu *c;
- unsigned long tid;
-+ bool sanitize = has_sanitize(s);
-+
-+ if (IS_ENABLED(CONFIG_SLAB_CANARY) || sanitize) {
-+ __maybe_unused int offset = s->offset ? 0 : sizeof(void *);
-+ void *x = head;
-+
-+ while (1) {
-+ check_canary(s, x, s->random_active);
-+ set_canary(s, x, s->random_inactive);
-+
-+ if (sanitize) {
-+ memset(x + offset, 0, s->object_size - offset);
-+ if (!IS_ENABLED(CONFIG_SLAB_SANITIZE_VERIFY) && s->ctor)
-+ s->ctor(x);
-+ }
-+ if (x == tail_obj)
-+ break;
-+ x = get_freepointer(s, x);
-+ }
-+ }
-+
- redo:
- /*
- * Determine the currently cpus per cpu slab.
-@@ -3106,7 +3188,7 @@
- void **p)
- {
- struct kmem_cache_cpu *c;
-- int i;
-+ int i, k;
-
- /* memcg and kmem_cache debug support */
- s = slab_pre_alloc_hook(s, flags);
-@@ -3143,13 +3225,29 @@
- local_irq_enable();
-
- /* Clear memory outside IRQ disabled fastpath loop */
-- if (unlikely(flags & __GFP_ZERO)) {
-+ if (has_sanitize_verify(s)) {
-+ int j;
-+
-+ for (j = 0; j < i; j++) {
-+ size_t offset = s->offset ? 0 : sizeof(void *);
-+ BUG_ON(memchr_inv(p[j] + offset, 0, s->object_size - offset));
-+ if (s->ctor)
-+ s->ctor(p[j]);
-+ if (unlikely(flags & __GFP_ZERO) && offset)
-+ memset(p[j], 0, sizeof(void *));
-+ }
-+ } else if (unlikely(flags & __GFP_ZERO)) {
- int j;
-
- for (j = 0; j < i; j++)
- memset(p[j], 0, s->object_size);
- }
-
-+ for (k = 0; k < i; k++) {
-+ check_canary(s, p[k], s->random_inactive);
-+ set_canary(s, p[k], s->random_active);
-+ }
-+
- /* memcg and kmem_cache debug support */
- slab_post_alloc_hook(s, flags, size, p);
- return i;
-@@ -3181,9 +3279,9 @@
- * and increases the number of allocations possible without having to
- * take the list_lock.
- */
--static int slub_min_order;
--static int slub_max_order = PAGE_ALLOC_COSTLY_ORDER;
--static int slub_min_objects;
-+static int slub_min_order __ro_after_init;
-+static int slub_max_order __ro_after_init = PAGE_ALLOC_COSTLY_ORDER;
-+static int slub_min_objects __ro_after_init;
-
- /*
- * Calculate the order of allocation given an slab object size.
-@@ -3353,6 +3451,7 @@
- init_object(kmem_cache_node, n, SLUB_RED_ACTIVE);
- init_tracking(kmem_cache_node, n);
- #endif
-+ set_canary(kmem_cache_node, n, kmem_cache_node->random_active);
- kasan_kmalloc(kmem_cache_node, n, sizeof(struct kmem_cache_node),
- GFP_KERNEL);
- init_kmem_cache_node(n);
-@@ -3509,6 +3608,9 @@
- size += sizeof(void *);
- }
-
-+ if (IS_ENABLED(CONFIG_SLAB_CANARY))
-+ size += sizeof(void *);
-+
- #ifdef CONFIG_SLUB_DEBUG
- if (flags & SLAB_STORE_USER)
- /*
-@@ -3579,6 +3681,10 @@
- #ifdef CONFIG_SLAB_FREELIST_HARDENED
- s->random = get_random_long();
- #endif
-+#ifdef CONFIG_SLAB_CANARY
-+ s->random_active = get_random_long();
-+ s->random_inactive = get_random_long();
-+#endif
-
- if (need_reserve_slab_rcu && (s->flags & SLAB_TYPESAFE_BY_RCU))
- s->reserved = sizeof(struct rcu_head);
-@@ -3846,6 +3952,8 @@
- offset -= s->red_left_pad;
- }
-
-+ check_canary(s, (void *)ptr - offset, s->random_active);
-+
- /* Allow address range falling entirely within usercopy region. */
- if (offset >= s->useroffset &&
- offset - s->useroffset <= s->usersize &&
-@@ -3879,7 +3987,11 @@
- page = virt_to_head_page(object);
-
- if (unlikely(!PageSlab(page))) {
-+#ifdef CONFIG_BUG_ON_DATA_CORRUPTION
-+ BUG_ON(!PageCompound(page));
-+#else
- WARN_ON(!PageCompound(page));
-+#endif
- return PAGE_SIZE << compound_order(page);
- }
-
-@@ -4744,7 +4856,7 @@
- #define SO_TOTAL (1 << SL_TOTAL)
-
- #ifdef CONFIG_MEMCG
--static bool memcg_sysfs_enabled = IS_ENABLED(CONFIG_SLUB_MEMCG_SYSFS_ON);
-+static bool memcg_sysfs_enabled __ro_after_init = IS_ENABLED(CONFIG_SLUB_MEMCG_SYSFS_ON);
-
- static int __init setup_slub_memcg_sysfs(char *str)
- {
-diff -Naur linux-4.16/mm/swap.c linux-4.16h-for-v3/mm/swap.c
---- linux-4.16/mm/swap.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/mm/swap.c 2018-04-11 22:38:06.418991293 +0200
-@@ -92,6 +92,13 @@
- if (!PageHuge(page))
- __page_cache_release(page);
- dtor = get_compound_page_dtor(page);
-+ if (!PageHuge(page))
-+ BUG_ON(dtor != free_compound_page
-+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
-+ && dtor != free_transhuge_page
-+#endif
-+ );
-+
- (*dtor)(page);
- }
-
-diff -Naur linux-4.16/net/core/dev.c linux-4.16h-for-v3/net/core/dev.c
---- linux-4.16/net/core/dev.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/net/core/dev.c 2018-04-11 22:38:06.419990921 +0200
-@@ -4196,7 +4196,7 @@
- }
- EXPORT_SYMBOL(netif_rx_ni);
-
--static __latent_entropy void net_tx_action(struct softirq_action *h)
-+static __latent_entropy void net_tx_action(void)
- {
- struct softnet_data *sd = this_cpu_ptr(&softnet_data);
-
-@@ -5745,7 +5745,7 @@
- return work;
- }
-
--static __latent_entropy void net_rx_action(struct softirq_action *h)
-+static __latent_entropy void net_rx_action(void)
- {
- struct softnet_data *sd = this_cpu_ptr(&softnet_data);
- unsigned long time_limit = jiffies +
-diff -Naur linux-4.16/net/ipv4/Kconfig linux-4.16h-for-v3/net/ipv4/Kconfig
---- linux-4.16/net/ipv4/Kconfig 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/net/ipv4/Kconfig 2018-04-11 22:38:06.419990921 +0200
-@@ -261,6 +261,7 @@
-
- config SYN_COOKIES
- bool "IP: TCP syncookie support"
-+ default y
- ---help---
- Normal TCP/IP networking is open to an attack known as "SYN
- flooding". This denial-of-service attack prevents legitimate remote
-diff -Naur linux-4.16/scripts/mod/modpost.c linux-4.16h-for-v3/scripts/mod/modpost.c
---- linux-4.16/scripts/mod/modpost.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/scripts/mod/modpost.c 2018-04-11 22:38:06.420990548 +0200
-@@ -37,6 +37,7 @@
- static int warn_unresolved = 0;
- /* How a symbol is exported */
- static int sec_mismatch_count = 0;
-+static int writable_fptr_count = 0;
- static int sec_mismatch_verbose = 1;
- static int sec_mismatch_fatal = 0;
- /* ignore missing files */
-@@ -965,6 +966,7 @@
- ANY_EXIT_TO_ANY_INIT,
- EXPORT_TO_INIT_EXIT,
- EXTABLE_TO_NON_TEXT,
-+ DATA_TO_TEXT
- };
-
- /**
-@@ -1091,6 +1093,12 @@
- .good_tosec = {ALL_TEXT_SECTIONS , NULL},
- .mismatch = EXTABLE_TO_NON_TEXT,
- .handler = extable_mismatch_handler,
-+},
-+/* Do not reference code from writable data */
-+{
-+ .fromsec = { DATA_SECTIONS, NULL },
-+ .bad_tosec = { ALL_TEXT_SECTIONS, NULL },
-+ .mismatch = DATA_TO_TEXT
- }
- };
-
-@@ -1240,10 +1248,10 @@
- continue;
- if (ELF_ST_TYPE(sym->st_info) == STT_SECTION)
- continue;
-- if (sym->st_value == addr)
-- return sym;
- /* Find a symbol nearby - addr are maybe negative */
- d = sym->st_value - addr;
-+ if (d == 0)
-+ return sym;
- if (d < 0)
- d = addr - sym->st_value;
- if (d < distance) {
-@@ -1402,7 +1410,11 @@
- char *prl_from;
- char *prl_to;
-
-- sec_mismatch_count++;
-+ if (mismatch->mismatch == DATA_TO_TEXT)
-+ writable_fptr_count++;
-+ else
-+ sec_mismatch_count++;
-+
- if (!sec_mismatch_verbose)
- return;
-
-@@ -1526,6 +1538,14 @@
- fatal("There's a special handler for this mismatch type, "
- "we should never get here.");
- break;
-+ case DATA_TO_TEXT:
-+#if 0
-+ fprintf(stderr,
-+ "The %s %s:%s references\n"
-+ "the %s %s:%s%s\n",
-+ from, fromsec, fromsym, to, tosec, tosym, to_p);
-+#endif
-+ break;
- }
- fprintf(stderr, "\n");
- }
-@@ -2539,6 +2559,14 @@
- }
- }
- free(buf.p);
-+ if (writable_fptr_count) {
-+ if (!sec_mismatch_verbose) {
-+ warn("modpost: Found %d writable function pointer(s).\n"
-+ "To see full details build your kernel with:\n"
-+ "'make CONFIG_DEBUG_SECTION_MISMATCH=y'\n",
-+ writable_fptr_count);
-+ }
-+ }
-
- return err;
- }
-diff -Naur linux-4.16/security/Kconfig linux-4.16h-for-v3/security/Kconfig
---- linux-4.16/security/Kconfig 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/security/Kconfig 2018-04-11 22:38:06.420990548 +0200
-@@ -8,7 +8,7 @@
-
- config SECURITY_DMESG_RESTRICT
- bool "Restrict unprivileged access to the kernel syslog"
-- default n
-+ default y
- help
- This enforces restrictions on unprivileged users reading the kernel
- syslog via dmesg(8).
-@@ -18,10 +18,34 @@
-
- If you are unsure how to answer this question, answer N.
-
-+config SECURITY_PERF_EVENTS_RESTRICT
-+ bool "Restrict unprivileged use of performance events"
-+ depends on PERF_EVENTS
-+ default y
-+ help
-+ If you say Y here, the kernel.perf_event_paranoid sysctl
-+ will be set to 3 by default, and no unprivileged use of the
-+ perf_event_open syscall will be permitted unless it is
-+ changed.
-+
-+config SECURITY_TIOCSTI_RESTRICT
-+ bool "Restrict unprivileged use of tiocsti command injection"
-+ default y
-+ help
-+ This enforces restrictions on unprivileged users injecting commands
-+ into other processes which share a tty session using the TIOCSTI
-+ ioctl. This option makes TIOCSTI use require CAP_SYS_ADMIN.
-+
-+ If this option is not selected, no restrictions will be enforced
-+ unless the tiocsti_restrict sysctl is explicitly set to (1).
-+
-+ If you are unsure how to answer this question, answer N.
-+
- config SECURITY
- bool "Enable different security models"
- depends on SYSFS
- depends on MULTIUSER
-+ default y
- help
- This allows you to choose different security modules to be
- configured into your kernel.
-@@ -48,6 +72,7 @@
- config SECURITY_NETWORK
- bool "Socket and Networking Security Hooks"
- depends on SECURITY
-+ default y
- help
- This enables the socket and networking security hooks.
- If enabled, a security module can use these hooks to
-@@ -155,6 +180,7 @@
- depends on HAVE_HARDENED_USERCOPY_ALLOCATOR
- select BUG
- imply STRICT_DEVMEM
-+ default y
- help
- This option checks for obviously wrong memory regions when
- copying memory to/from the kernel (via copy_to_user() and
-@@ -192,10 +218,36 @@
- config FORTIFY_SOURCE
- bool "Harden common str/mem functions against buffer overflows"
- depends on ARCH_HAS_FORTIFY_SOURCE
-+ default y
- help
- Detect overflows of buffers in common string and memory functions
- where the compiler can determine and validate the buffer sizes.
-
-+config FORTIFY_SOURCE_STRICT_STRING
-+ bool "Harden common functions against buffer overflows"
-+ depends on FORTIFY_SOURCE
-+ depends on EXPERT
-+ help
-+ Perform stricter overflow checks catching overflows within objects
-+ for common C string functions rather than only between objects.
-+
-+ This is not yet intended for production use, only bug finding.
-+
-+config PAGE_SANITIZE
-+ bool "Sanitize pages"
-+ default y
-+ help
-+ Zero fill page allocations on free, reducing the lifetime of
-+ sensitive data and helping to mitigate use-after-free bugs.
-+
-+config PAGE_SANITIZE_VERIFY
-+ bool "Verify sanitized pages"
-+ depends on PAGE_SANITIZE
-+ default y
-+ help
-+ Verify that newly allocated pages are zeroed to detect
-+ write-after-free bugs.
-+
- config STATIC_USERMODEHELPER
- bool "Force all usermode helper calls through a single binary"
- help
-diff -Naur linux-4.16/security/selinux/include/objsec.h linux-4.16h-for-v3/security/selinux/include/objsec.h
---- linux-4.16/security/selinux/include/objsec.h 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/security/selinux/include/objsec.h 2018-04-11 22:38:06.420990548 +0200
-@@ -154,6 +154,6 @@
- u32 sid; /*SID of bpf obj creater*/
- };
-
--extern unsigned int selinux_checkreqprot;
-+extern const unsigned int selinux_checkreqprot;
-
- #endif /* _SELINUX_OBJSEC_H_ */
-diff -Naur linux-4.16/security/selinux/Kconfig linux-4.16h-for-v3/security/selinux/Kconfig
---- linux-4.16/security/selinux/Kconfig 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/security/selinux/Kconfig 2018-04-11 22:38:06.420990548 +0200
-@@ -2,7 +2,7 @@
- bool "NSA SELinux Support"
- depends on SECURITY_NETWORK && AUDIT && NET && INET
- select NETWORK_SECMARK
-- default n
-+ default y
- help
- This selects NSA Security-Enhanced Linux (SELinux).
- You will also need a policy configuration and a labeled filesystem.
-@@ -79,23 +79,3 @@
- This option collects access vector cache statistics to
- /selinux/avc/cache_stats, which may be monitored via
- tools such as avcstat.
--
--config SECURITY_SELINUX_CHECKREQPROT_VALUE
-- int "NSA SELinux checkreqprot default value"
-- depends on SECURITY_SELINUX
-- range 0 1
-- default 0
-- help
-- This option sets the default value for the 'checkreqprot' flag
-- that determines whether SELinux checks the protection requested
-- by the application or the protection that will be applied by the
-- kernel (including any implied execute for read-implies-exec) for
-- mmap and mprotect calls. If this option is set to 0 (zero),
-- SELinux will default to checking the protection that will be applied
-- by the kernel. If this option is set to 1 (one), SELinux will
-- default to checking the protection requested by the application.
-- The checkreqprot flag may be changed from the default via the
-- 'checkreqprot=' boot parameter. It may also be changed at runtime
-- via /selinux/checkreqprot if authorized by policy.
--
-- If you are unsure how to answer this question, answer 0.
-diff -Naur linux-4.16/security/selinux/selinuxfs.c linux-4.16h-for-v3/security/selinux/selinuxfs.c
---- linux-4.16/security/selinux/selinuxfs.c 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/security/selinux/selinuxfs.c 2018-04-11 22:38:06.420990548 +0200
-@@ -41,16 +41,7 @@
- #include "objsec.h"
- #include "conditional.h"
-
--unsigned int selinux_checkreqprot = CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE;
--
--static int __init checkreqprot_setup(char *str)
--{
-- unsigned long checkreqprot;
-- if (!kstrtoul(str, 0, &checkreqprot))
-- selinux_checkreqprot = checkreqprot ? 1 : 0;
-- return 1;
--}
--__setup("checkreqprot=", checkreqprot_setup);
-+const unsigned int selinux_checkreqprot;
-
- static DEFINE_MUTEX(sel_mutex);
-
-@@ -610,10 +601,9 @@
- return PTR_ERR(page);
-
- length = -EINVAL;
-- if (sscanf(page, "%u", &new_value) != 1)
-+ if (sscanf(page, "%u", &new_value) != 1 || new_value)
- goto out;
-
-- selinux_checkreqprot = new_value ? 1 : 0;
- length = count;
- out:
- kfree(page);
-diff -Naur linux-4.16/security/yama/Kconfig linux-4.16h-for-v3/security/yama/Kconfig
---- linux-4.16/security/yama/Kconfig 2018-04-01 23:20:27.000000000 +0200
-+++ linux-4.16h-for-v3/security/yama/Kconfig 2018-04-11 22:38:06.420990548 +0200
-@@ -1,7 +1,7 @@
- config SECURITY_YAMA
- bool "Yama support"
- depends on SECURITY
-- default n
-+ default y
- help
- This selects Yama, which extends DAC support with additional
- system-wide security settings beyond regular Linux discretionary