From e5b50ada76f44c8742a123813689bff4db062a5a Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Wed, 8 Oct 2014 12:08:38 +0200 Subject: [PATCH] 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 Signed-off-by: Takashi Iwai --- sound/core/misc.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/sound/core/misc.c b/sound/core/misc.c index 30e027e..f2e8226 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); -- 2.7.4