ALSA: rawmidi: Another workaround for false-positive mutex lockdep warning

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While we attempted to work around the false-positive lockdep warning
due to the nested mutex lock in rawmidi at the open path for a UMP
legacy rawmidi, it didn't cover the similar locking at its close path,
and this still caused another false-positive reports by syzkaller.

Add a similar workaround to snd_rawmidi_kernel_release() as done in
the former commit 9c04742e73 ("ALSA: rawmidi: Work around
false-positive mutex lockdep warning") to cover completely.

Reported-by: syzbot+7d1edf0ff6a05961020c@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/6a8c7e4d.4d75e56a.c9a88.0052.GAE@google.com
Link: https://patch.msgid.link/20260825134942.1289272-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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This commit is contained in:

Takashi Iwai 2026-08-25 15:49:31 +02:00

parent adb176c140

commit 58c1c30074

3 changed files with 16 additions and 6 deletions

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8

include/sound/rawmidi.h

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11

sound/core/rawmidi.c

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3

sound/core/ump.c

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