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ALSA: hda: cs35l41: Possible null pointer dereference in cs35l41_hda_unbind()

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[ Upstream commit 6386682cdc ]

The cs35l41_hda_unbind() function clears the hda_component entry
matching it's index and then dereferences the codec pointer held in the
first element of the hda_component array, this is an issue when the
device index was 0.

Instead use the codec pointer stashed in the cs35l41_hda structure as it
will still be valid.

Fixes: 7cf5ce66df ("ALSA: hda: cs35l41: Add device_link between HDA and cs35l41_hda")
Signed-off-by: Simon Trimmer <simont@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20240531120820.35367-1-simont@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Simon Trimmer 2024-05-31 13:08:20 +01:00 committed by Greg Kroah-Hartman
parent fae0e055d0
commit ff27bd8e17
1 changed files with 1 additions and 1 deletions
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2
sound/pci/hda/cs35l41_hda.c
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@ -1187,7 +1187,7 @@ static void cs35l41_hda_unbind(struct device *dev, struct device *master, void *
if (comps[cs35l41->index].dev == dev) {
memset(&comps[cs35l41->index], 0, sizeof(*comps));
sleep_flags = lock_system_sleep();
device_link_remove(&comps->codec->core.dev, cs35l41->dev);
device_link_remove(&cs35l41->codec->core.dev, cs35l41->dev);
unlock_system_sleep(sleep_flags);
}
}