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| author |   Takashi Iwai <tiwai@suse.de> | 2014-10-08 12:08:38 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2014-10-08 12:08:38 +0200 |
| commit | e5b50ada76f44c8742a123813689bff4db062a5a (patch) | |
| tree | 44749468fa4996afa2cf33337be62f71ea447df8 /sound | |
| parent | ALSA: hda - Add dock support for Thinkpad T440 (17aa:2212) (diff) | |
| download | linux-dev-e5b50ada76f44c8742a123813689bff4db062a5a.tar.xz linux-dev-e5b50ada76f44c8742a123813689bff4db062a5a.zip | |
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.c | 2 |
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); |