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ALSA: usb-audio: Fix missing unlock at error path of maxpacksize check

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The recent backport of the upstream commit 05a1fc5efd ("ALSA:
usb-audio: Fix potential overflow of PCM transfer buffer") on the
older stable kernels like 6.12.y was broken since it doesn't consider
the mutex unlock, where the upstream code manages with guard().
In the older code, we still need an explicit unlock.

This is a fix that corrects the error path, applied only on old stable
trees.

Reported-by: Pavel Machek <pavel@denx.de>
Closes: https://lore.kernel.org/aSWtH0AZH5+aeb+a@duo.ucw.cz
Fixes: 98e9d5e33b ("ALSA: usb-audio: Fix potential overflow of PCM transfer buffer")
Reviewed-by: Pavel Machek <pavel@denx.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Takashi Iwai
2025-11-26 11:08:31 +01:00
committed by Greg Kroah-Hartman
parent f16b97babd
commit fdf0dc82eb
1 changed files with 2 additions and 1 deletions
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3
sound/usb/endpoint.c
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@@ -1389,7 +1389,8 @@ int snd_usb_endpoint_set_params(struct snd_usb_audio *chip,
if (ep->packsize[1] > ep->maxpacksize) {
usb_audio_dbg(chip, "Too small maxpacksize %u for rate %u / pps %u\n",
ep->maxpacksize, ep->cur_rate, ep->pps);
return -EINVAL;
err = -EINVAL;
goto unlock;
}
/* calculate the frequency in 16.16 format */