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ALSA: pcm: oss: Remove superfluous WARN_ON() for mulaw sanity check 

The PCM OSS mulaw plugin has a check of the format of the counter part
whether it's a linear format.  The check is with snd_BUG_ON() that
emits WARN_ON() when the debug config is set, and it confuses
syzkaller as if it were a serious issue.  Let's drop snd_BUG_ON() for
avoiding that.

While we're at it, correct the error code to a more suitable, EINVAL.

Reported-by: syzbot+23b22dc2e0b81cbfcc95@syzkaller.appspotmail.com
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200901131802.18157-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
zero-sugar-mainline-defconfig
Takashi Iwai 2020-09-01 15:18:02 +02:00
parent 15cbff3fbb
commit 949a1ebe8c
1 changed files with 2 additions and 2 deletions
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4
sound/core/oss/mulaw.c
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@ -329,8 +329,8 @@ int snd_pcm_plugin_build_mulaw(struct snd_pcm_substream *plug,
snd_BUG();
return -EINVAL;
}
if (snd_BUG_ON(!snd_pcm_format_linear(format->format)))
return -ENXIO;
if (!snd_pcm_format_linear(format->format))
return -EINVAL;
err = snd_pcm_plugin_build(plug, "Mu-Law<->linear conversion",
src_format, dst_format,