ALSA: ac97: fix a double free in snd_ac97_controller_register()

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If ac97_add_adapter() fails, put_device() is the correct way to drop
the device reference. kfree() is not required.
Add kfree() if idr_alloc() fails and in ac97_adapter_release() to do
the cleanup.

Found by code review.

Fixes: 74426fbff6 ("ALSA: ac97: add an ac97 bus")
Cc: stable@vger.kernel.org
Signed-off-by: Haoxiang Li <lihaoxiang@isrc.iscas.ac.cn>
Link: https://patch.msgid.link/20251219162845.657525-1-lihaoxiang@isrc.iscas.ac.cn
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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Haoxiang Li 2025-12-20 00:28:45 +08:00 • committed by Takashi Iwai

parent 17753d1755

commit 830988b6cf

1 changed files with 5 additions and 5 deletions

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sound/ac97/bus.c

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