ALSA: hda: cs35l41: Fix NULL pointer dereference in cs35l41_hda_read_acpi()

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[ Upstream commit c34b04cc61 ]

The acpi_get_first_physical_node() function can return NULL, in which
case the get_device() function also returns NULL, but this value is
then dereferenced without checking,so add a check to prevent a crash.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 7b2f3eb492 ("ALSA: hda: cs35l41: Add support for CS35L41 in HDA systems")
Cc: stable@vger.kernel.org
Signed-off-by: Denis Arefev <arefev@swemel.ru>
Reviewed-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20251202101338.11437-1-arefev@swemel.ru
[ sound/hda/codecs/side-codecs/ -> sound/pci/hda/ ]
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Denis Arefev 2025-12-16 06:00:34 -05:00 • committed by Greg Kroah-Hartman

parent 05a609c1e5

commit e6ba921b17

1 changed files with 2 additions and 0 deletions

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sound/pci/hda/cs35l41_hda.c

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