ALSA: pcm: Test for "silence" field in struct "pcm_format_data"

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Syzbot reports "KASAN: null-ptr-deref Write in
snd_pcm_format_set_silence".[1]

It is due to missing validation of the "silence" field of struct
"pcm_format_data" in "pcm_formats" array.

Add a test for valid "pat" and, if it is not so, return -EINVAL.

[1] https://lore.kernel.org/lkml/000000000000d188ef05dc2c7279@google.com/

Reported-and-tested-by: syzbot+205eb15961852c2c5974@syzkaller.appspotmail.com
Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20220409012655.9399-1-fmdefrancesco@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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Fabio M. De Francesco 2022-04-09 03:26:55 +02:00 • committed by Takashi Iwai

parent fee2ec8cce

commit 2f7a26abb8

1 changed files with 1 additions and 1 deletions

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sound/core/pcm_misc.c

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