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authorTakashi Iwai <tiwai@suse.de>2014-10-08 12:08:38 +0200
committerTakashi Iwai <tiwai@suse.de>2014-10-08 12:08:38 +0200
commite5b50ada76f44c8742a123813689bff4db062a5a (patch)
tree44749468fa4996afa2cf33337be62f71ea447df8 /sound
parent6d16941aee6eb468c5a5cc78ecbaf840f3e16df5 (diff)
ALSA: Allow pass NULL dev for snd_pci_quirk_lookup()
Add a NULL check in snd_pci_quirk_lookup() so that NULL can be passed as a pci_dev pointer. This fixes the possible NULL dereferences in HD-audio drivers. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
-rw-r--r--sound/core/misc.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/sound/core/misc.c b/sound/core/misc.c
index 30e027ecf4da..f2e8226c88fb 100644
--- a/sound/core/misc.c
+++ b/sound/core/misc.c
@@ -145,6 +145,8 @@ EXPORT_SYMBOL(snd_pci_quirk_lookup_id);
const struct snd_pci_quirk *
snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list)
{
+ if (!pci)
+ return NULL;
return snd_pci_quirk_lookup_id(pci->subsystem_vendor,
pci->subsystem_device,
list);