Haoxiang Li 21f8bc5179 ALSA: ac97: fix a double free in snd_ac97_controller_register()
[ Upstream commit 830988b6cf197e6dcffdfe2008c5738e6c6c3c0f ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2026-01-17 16:29:59 +01:00
2022-09-28 09:02:20 +02:00
2026-01-11 15:22:34 +01:00

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