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| author | Takashi Iwai <tiwai@suse.de> | 2022-10-11 09:01:47 +0200 |
|---|---|---|
| committer | Alexander Grund <flamefire89@gmail.com> | 2023-11-09 19:17:24 +0100 |
| commit | ae60a2dabbf5a91cc9b838a94d773d43b4894bed (patch) | |
| tree | 6808517ca786c8c9b8e8a758158694d9155b93f5 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | 05145446909ee777a4dd20600a5074a0031c3f3f (diff) | |
ALSA: oss: Fix potential deadlock at unregistration
commit 97d917879d7f92df09c3f21fd54609a8bcd654b2 upstream.
We took sound_oss_mutex around the calls of unregister_sound_special()
at unregistering OSS devices. This may, however, lead to a deadlock,
because we manage the card release via the card's device object, and
the release may happen at unregister_sound_special() call -- which
will take sound_oss_mutex again in turn.
Although the deadlock might be fixed by relaxing the rawmidi mutex in
the previous commit, it's safer to move unregister_sound_special()
calls themselves out of the sound_oss_mutex, too. The call is
race-safe as the function has a spinlock protection by itself.
Link: https://lore.kernel.org/r/CAB7eexJP7w1B0mVgDF0dQ+gWor7UdkiwPczmL7pn91xx8xpzOA@mail.gmail.com
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20221011070147.7611-2-tiwai@suse.de
Change-Id: Ie16159f33d5144646eacb78f5e019b07435df426
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ulrich Hecht <uli+cip@fpond.eu>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions