This is a note to let you know that I've just added the patch titled
ALSA: pcm: fix out-of-bounds in snd_pcm_state_names
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
alsa-pcm-fix-out-of-bounds-in-snd_pcm_state_names.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 2b3a7a302c9804e463f2ea5b54dc3a6ad106a344 Mon Sep 17 00:00:00 2001
From: Jason Zhang <jason.zhang@xxxxxxxxxxxxxx>
Date: Wed, 6 Dec 2023 09:31:39 +0800
Subject: ALSA: pcm: fix out-of-bounds in snd_pcm_state_names
From: Jason Zhang <jason.zhang@xxxxxxxxxxxxxx>
commit 2b3a7a302c9804e463f2ea5b54dc3a6ad106a344 upstream.
The pcm state can be SNDRV_PCM_STATE_DISCONNECTED at disconnect
callback, and there is not an entry of SNDRV_PCM_STATE_DISCONNECTED
in snd_pcm_state_names.
This patch adds the missing entry to resolve this issue.
cat /proc/asound/card2/pcm0p/sub0/status
That results in stack traces like the following:
[ 99.702732][ T5171] Unexpected kernel BRK exception at EL1
[ 99.702774][ T5171] Internal error: BRK handler: f2005512 [#1] PREEMPT SMP
[ 99.703858][ T5171] Modules linked in: bcmdhd(E) (...)
[ 99.747425][ T5171] CPU: 3 PID: 5171 Comm: cat Tainted: G C OE 5.10.189-android13-4-00003-g4a17384380d8-ab11086999 #1
[ 99.748447][ T5171] Hardware name: Rockchip RK3588 CVTE V10 Board (DT)
[ 99.749024][ T5171] pstate: 60400005 (nZCv daif +PAN -UAO -TCO BTYPE=--)
[ 99.749616][ T5171] pc : snd_pcm_substream_proc_status_read+0x264/0x2bc
[ 99.750204][ T5171] lr : snd_pcm_substream_proc_status_read+0xa4/0x2bc
[ 99.750778][ T5171] sp : ffffffc0175abae0
[ 99.751132][ T5171] x29: ffffffc0175abb80 x28: ffffffc009a2c498
[ 99.751665][ T5171] x27: 0000000000000001 x26: ffffff810cbae6e8
[ 99.752199][ T5171] x25: 0000000000400cc0 x24: ffffffc0175abc60
[ 99.752729][ T5171] x23: 0000000000000000 x22: ffffff802f558400
[ 99.753263][ T5171] x21: ffffff81d8d8ff00 x20: ffffff81020cdc00
[ 99.753795][ T5171] x19: ffffff802d110000 x18: ffffffc014fbd058
[ 99.754326][ T5171] x17: 0000000000000000 x16: 0000000000000000
[ 99.754861][ T5171] x15: 000000000000c276 x14: ffffffff9a976fda
[ 99.755392][ T5171] x13: 0000000065689089 x12: 000000000000d72e
[ 99.755923][ T5171] x11: ffffff802d110000 x10: 00000000000000e0
[ 99.756457][ T5171] x9 : 9c431600c8385d00 x8 : 0000000000000008
[ 99.756990][ T5171] x7 : 0000000000000000 x6 : 000000000000003f
[ 99.757522][ T5171] x5 : 0000000000000040 x4 : ffffffc0175abb70
[ 99.758056][ T5171] x3 : 0000000000000001 x2 : 0000000000000001
[ 99.758588][ T5171] x1 : 0000000000000000 x0 : 0000000000000000
[ 99.759123][ T5171] Call trace:
[ 99.759404][ T5171] snd_pcm_substream_proc_status_read+0x264/0x2bc
[ 99.759958][ T5171] snd_info_seq_show+0x54/0xa4
[ 99.760370][ T5171] seq_read_iter+0x19c/0x7d4
[ 99.760770][ T5171] seq_read+0xf0/0x128
[ 99.761117][ T5171] proc_reg_read+0x100/0x1f8
[ 99.761515][ T5171] vfs_read+0xf4/0x354
[ 99.761869][ T5171] ksys_read+0x7c/0x148
[ 99.762226][ T5171] __arm64_sys_read+0x20/0x30
[ 99.762625][ T5171] el0_svc_common+0xd0/0x1e4
[ 99.763023][ T5171] el0_svc+0x28/0x98
[ 99.763358][ T5171] el0_sync_handler+0x8c/0xf0
[ 99.763759][ T5171] el0_sync+0x1b8/0x1c0
[ 99.764118][ T5171] Code: d65f03c0 b9406102 17ffffae 94191565 (d42aa240)
[ 99.764715][ T5171] ---[ end trace 1eeffa3e17c58e10 ]---
[ 99.780720][ T5171] Kernel panic - not syncing: BRK handler: Fatal exception
Signed-off-by: Jason Zhang <jason.zhang@xxxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20231206013139.20506-1-jason.zhang@xxxxxxxxxxxxxx
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/core/pcm.c | 1 +
1 file changed, 1 insertion(+)
--- a/sound/core/pcm.c
+++ b/sound/core/pcm.c
@@ -251,6 +251,7 @@ static char *snd_pcm_state_names[] = {
STATE(DRAINING),
STATE(PAUSED),
STATE(SUSPENDED),
+ STATE(DISCONNECTED),
};
static char *snd_pcm_access_names[] = {
Patches currently in stable-queue which might be from jason.zhang@xxxxxxxxxxxxxx are
queue-5.4/alsa-pcm-fix-out-of-bounds-in-snd_pcm_state_names.patch
