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authorTakashi Iwai <tiwai@suse.de>2020-04-20 09:55:29 +0200
committerTakashi Iwai <tiwai@suse.de>2020-04-21 08:00:41 +0200
commit7686e3485253635c529cdd5f416fc640abaf076f (patch)
treed85bab8e433de3e7f18b34ec34e63b326265f67a /sound/usb/usx2y
parent6f4ea2074ddf689ac6f892afa58515032dabf2e4 (diff)
downloadlinux-7686e3485253635c529cdd5f416fc640abaf076f.tar.bz2
ALSA: usx2y: Fix potential NULL dereference
The error handling code in usX2Y_rate_set() may hit a potential NULL dereference when an error occurs before allocating all us->urb[]. Add a proper NULL check for fixing the corner case. Reported-by: Lin Yi <teroincn@gmail.com> Cc: <stable@vger.kernel.org> Link: https://lore.kernel.org/r/20200420075529.27203-1-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb/usx2y')
-rw-r--r--sound/usb/usx2y/usbusx2yaudio.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/sound/usb/usx2y/usbusx2yaudio.c b/sound/usb/usx2y/usbusx2yaudio.c
index 37d290fe9d43..ecaf41265dcd 100644
--- a/sound/usb/usx2y/usbusx2yaudio.c
+++ b/sound/usb/usx2y/usbusx2yaudio.c
@@ -681,6 +681,8 @@ static int usX2Y_rate_set(struct usX2Ydev *usX2Y, int rate)
us->submitted = 2*NOOF_SETRATE_URBS;
for (i = 0; i < NOOF_SETRATE_URBS; ++i) {
struct urb *urb = us->urb[i];
+ if (!urb)
+ continue;
if (urb->status) {
if (!err)
err = -ENODEV;