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-rw-r--r--sys-apps/systemd/files/CVE-2019-6454/0002-Allocate-temporary-strings-to-hold-dbus-paths-on-the.patch188
1 files changed, 188 insertions, 0 deletions
diff --git a/sys-apps/systemd/files/CVE-2019-6454/0002-Allocate-temporary-strings-to-hold-dbus-paths-on-the.patch b/sys-apps/systemd/files/CVE-2019-6454/0002-Allocate-temporary-strings-to-hold-dbus-paths-on-the.patch
new file mode 100644
index 000000000000..bbc6db974d4a
--- /dev/null
+++ b/sys-apps/systemd/files/CVE-2019-6454/0002-Allocate-temporary-strings-to-hold-dbus-paths-on-the.patch
@@ -0,0 +1,188 @@
+From 1ffe59592c5cbf924eb81a3662b4252ba6de7132 Mon Sep 17 00:00:00 2001
+From: Riccardo Schirone <rschiron@redhat.com>
+Date: Mon, 4 Feb 2019 14:29:28 +0100
+Subject: [PATCH 2/3] Allocate temporary strings to hold dbus paths on the heap
+
+Paths are limited to BUS_PATH_SIZE_MAX but the maximum size is anyway too big
+to be allocated on the stack, so let's switch to the heap where there is a
+clear way to understand if the allocation fails.
+---
+ src/libsystemd/sd-bus/bus-objects.c | 68 +++++++++++++++++++++++------
+ 1 file changed, 54 insertions(+), 14 deletions(-)
+
+diff --git a/src/libsystemd/sd-bus/bus-objects.c b/src/libsystemd/sd-bus/bus-objects.c
+index 58329f3fe7..54b977418e 100644
+--- a/src/libsystemd/sd-bus/bus-objects.c
++++ b/src/libsystemd/sd-bus/bus-objects.c
+@@ -1133,7 +1133,8 @@ static int object_manager_serialize_path_and_fallbacks(
+ const char *path,
+ sd_bus_error *error) {
+
+- char *prefix;
++ _cleanup_free_ char *prefix = NULL;
++ size_t pl;
+ int r;
+
+ assert(bus);
+@@ -1149,7 +1150,12 @@ static int object_manager_serialize_path_and_fallbacks(
+ return 0;
+
+ /* Second, add fallback vtables registered for any of the prefixes */
+- prefix = newa(char, strlen(path) + 1);
++ pl = strlen(path);
++ assert(pl <= BUS_PATH_SIZE_MAX);
++ prefix = new(char, pl + 1);
++ if (!prefix)
++ return -ENOMEM;
++
+ OBJECT_PATH_FOREACH_PREFIX(prefix, path) {
+ r = object_manager_serialize_path(bus, reply, prefix, path, true, error);
+ if (r < 0)
+@@ -1345,6 +1351,7 @@ static int object_find_and_run(
+ }
+
+ int bus_process_object(sd_bus *bus, sd_bus_message *m) {
++ _cleanup_free_ char *prefix = NULL;
+ int r;
+ size_t pl;
+ bool found_object = false;
+@@ -1369,9 +1376,12 @@ int bus_process_object(sd_bus *bus, sd_bus_message *m) {
+ assert(m->member);
+
+ pl = strlen(m->path);
+- do {
+- char prefix[pl+1];
++ assert(pl <= BUS_PATH_SIZE_MAX);
++ prefix = new(char, pl + 1);
++ if (!prefix)
++ return -ENOMEM;
+
++ do {
+ bus->nodes_modified = false;
+
+ r = object_find_and_run(bus, m, m->path, false, &found_object);
+@@ -1498,9 +1508,15 @@ static int bus_find_parent_object_manager(sd_bus *bus, struct node **out, const
+
+ n = hashmap_get(bus->nodes, path);
+ if (!n) {
+- char *prefix;
++ _cleanup_free_ char *prefix = NULL;
++ size_t pl;
++
++ pl = strlen(path);
++ assert(pl <= BUS_PATH_SIZE_MAX);
++ prefix = new(char, pl + 1);
++ if (!prefix)
++ return -ENOMEM;
+
+- prefix = newa(char, strlen(path) + 1);
+ OBJECT_PATH_FOREACH_PREFIX(prefix, path) {
+ n = hashmap_get(bus->nodes, prefix);
+ if (n)
+@@ -2083,8 +2099,9 @@ _public_ int sd_bus_emit_properties_changed_strv(
+ const char *interface,
+ char **names) {
+
++ _cleanup_free_ char *prefix = NULL;
+ bool found_interface = false;
+- char *prefix;
++ size_t pl;
+ int r;
+
+ assert_return(bus, -EINVAL);
+@@ -2105,6 +2122,12 @@ _public_ int sd_bus_emit_properties_changed_strv(
+
+ BUS_DONT_DESTROY(bus);
+
++ pl = strlen(path);
++ assert(pl <= BUS_PATH_SIZE_MAX);
++ prefix = new(char, pl + 1);
++ if (!prefix)
++ return -ENOMEM;
++
+ do {
+ bus->nodes_modified = false;
+
+@@ -2114,7 +2137,6 @@ _public_ int sd_bus_emit_properties_changed_strv(
+ if (bus->nodes_modified)
+ continue;
+
+- prefix = newa(char, strlen(path) + 1);
+ OBJECT_PATH_FOREACH_PREFIX(prefix, path) {
+ r = emit_properties_changed_on_interface(bus, prefix, path, interface, true, &found_interface, names);
+ if (r != 0)
+@@ -2246,7 +2268,8 @@ static int object_added_append_all_prefix(
+
+ static int object_added_append_all(sd_bus *bus, sd_bus_message *m, const char *path) {
+ _cleanup_set_free_ Set *s = NULL;
+- char *prefix;
++ _cleanup_free_ char *prefix = NULL;
++ size_t pl;
+ int r;
+
+ assert(bus);
+@@ -2291,7 +2314,12 @@ static int object_added_append_all(sd_bus *bus, sd_bus_message *m, const char *p
+ if (bus->nodes_modified)
+ return 0;
+
+- prefix = newa(char, strlen(path) + 1);
++ pl = strlen(path);
++ assert(pl <= BUS_PATH_SIZE_MAX);
++ prefix = new(char, pl + 1);
++ if (!prefix)
++ return -ENOMEM;
++
+ OBJECT_PATH_FOREACH_PREFIX(prefix, path) {
+ r = object_added_append_all_prefix(bus, m, s, prefix, path, true);
+ if (r < 0)
+@@ -2430,7 +2458,8 @@ static int object_removed_append_all_prefix(
+
+ static int object_removed_append_all(sd_bus *bus, sd_bus_message *m, const char *path) {
+ _cleanup_set_free_ Set *s = NULL;
+- char *prefix;
++ _cleanup_free_ char *prefix = NULL;
++ size_t pl;
+ int r;
+
+ assert(bus);
+@@ -2462,7 +2491,12 @@ static int object_removed_append_all(sd_bus *bus, sd_bus_message *m, const char
+ if (bus->nodes_modified)
+ return 0;
+
+- prefix = newa(char, strlen(path) + 1);
++ pl = strlen(path);
++ assert(pl <= BUS_PATH_SIZE_MAX);
++ prefix = new(char, pl + 1);
++ if (!prefix)
++ return -ENOMEM;
++
+ OBJECT_PATH_FOREACH_PREFIX(prefix, path) {
+ r = object_removed_append_all_prefix(bus, m, s, prefix, path, true);
+ if (r < 0)
+@@ -2612,7 +2646,8 @@ static int interfaces_added_append_one(
+ const char *path,
+ const char *interface) {
+
+- char *prefix;
++ _cleanup_free_ char *prefix = NULL;
++ size_t pl;
+ int r;
+
+ assert(bus);
+@@ -2626,7 +2661,12 @@ static int interfaces_added_append_one(
+ if (bus->nodes_modified)
+ return 0;
+
+- prefix = newa(char, strlen(path) + 1);
++ pl = strlen(path);
++ assert(pl <= BUS_PATH_SIZE_MAX);
++ prefix = new(char, pl + 1);
++ if (!prefix)
++ return -ENOMEM;
++
+ OBJECT_PATH_FOREACH_PREFIX(prefix, path) {
+ r = interfaces_added_append_one_prefix(bus, m, prefix, path, interface, true);
+ if (r != 0)
+--
+2.20.1
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-18 17:39:42 +0000