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https://github.com/alsa-project/alsa-lib/commit/0e3dfb9f705ca78be34cd70fd59d67c431e29cc7
From 0e3dfb9f705ca78be34cd70fd59d67c431e29cc7 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Sat, 9 Sep 2023 17:42:03 +0200
Subject: [PATCH] pcm: Fix segfault with 32bit libs
The recent rearrangement of header inclusion order caused a regression
showing segfaults on 32bit Arm. The primary reason is the
inconsistent compile condition depending on the inclusion of config.h;
while most of other code include pcm_local.h (that implicitly includes
config.h) at first, pcm_direct.c doesn't do it, hence the access with
direct plugins crashes.
For fixing it, we need to include config.h at the beginning. But,
it's better to include pcm_local.h for all relevant code for
consistency. The patch does it, and also it adds the guard in
pcm_local.h for double inclusions.
Fixes: ad3a8b8b314e ("reshuffle included files to include config.h as first")
Link: https://github.com/alsa-project/alsa-lib/issues/352
Signed-off-by: Takashi Iwai <tiwai@suse.de>
--- a/src/pcm/pcm_direct.c
+++ b/src/pcm/pcm_direct.c
@@ -19,6 +19,7 @@
*
*/
+#include "pcm_local.h"
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
--- a/src/pcm/pcm_dmix.c
+++ b/src/pcm/pcm_dmix.c
@@ -26,7 +26,7 @@
*
*/
-#include "config.h"
+#include "pcm_local.h"
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
--- a/src/pcm/pcm_dshare.c
+++ b/src/pcm/pcm_dshare.c
@@ -26,6 +26,7 @@
*
*/
+#include "pcm_local.h"
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
--- a/src/pcm/pcm_dsnoop.c
+++ b/src/pcm/pcm_dsnoop.c
@@ -26,6 +26,7 @@
*
*/
+#include "pcm_local.h"
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
--- a/src/pcm/pcm_local.h
+++ b/src/pcm/pcm_local.h
@@ -20,6 +20,9 @@
*
*/
+#ifndef __PCM_LOCAL_H
+#define __PCM_LOCAL_H
+
#include "config.h"
#include <stdio.h>
@@ -1223,3 +1226,5 @@ static inline void snd_pcm_unlock(snd_pcm_t *pcm)
#define snd_pcm_lock(pcm) do {} while (0)
#define snd_pcm_unlock(pcm) do {} while (0)
#endif /* THREAD_SAFE_API */
+
+#endif /* __PCM_LOCAL_H */
--- a/src/pcm/pcm_shm.c
+++ b/src/pcm/pcm_shm.c
@@ -26,6 +26,7 @@
*
*/
+#include "pcm_local.h"
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
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