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authorTakashi Iwai <tiwai@suse.de>2019-11-13 12:12:59 +0100
committerTakashi Iwai <tiwai@suse.de>2019-11-14 12:09:06 +0100
commitcc9dbfa9707868fb0ca864c05e0c42d3f4d15cf2 (patch)
treedac8f56c68b2c1eae9feb51e12c8a37509cf2688 /sound
parentf5cdc9d4003a2f66ea57b3edd3e04acc2b1a4439 (diff)
downloadlinux-cc9dbfa9707868fb0ca864c05e0c42d3f4d15cf2.tar.bz2
ALSA: usb-audio: Fix incorrect NULL check in create_yamaha_midi_quirk()
The commit 60849562a5db ("ALSA: usb-audio: Fix possible NULL dereference at create_yamaha_midi_quirk()") added NULL checks in create_yamaha_midi_quirk(), but there was an overlook. The code allows one of either injd or outjd is NULL, but the second if check made returning -ENODEV if any of them is NULL. Fix it in a proper form. Fixes: 60849562a5db ("ALSA: usb-audio: Fix possible NULL dereference at create_yamaha_midi_quirk()") Reported-by: Pavel Machek <pavel@denx.de> Cc: <stable@vger.kernel.org> Link: https://lore.kernel.org/r/20191113111259.24123-1-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
-rw-r--r--sound/usb/quirks.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index 0bbe1201a6ac..349e1e52996d 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -248,8 +248,8 @@ static int create_yamaha_midi_quirk(struct snd_usb_audio *chip,
NULL, USB_MS_MIDI_OUT_JACK);
if (!injd && !outjd)
return -ENODEV;
- if (!(injd && snd_usb_validate_midi_desc(injd)) ||
- !(outjd && snd_usb_validate_midi_desc(outjd)))
+ if ((injd && !snd_usb_validate_midi_desc(injd)) ||
+ (outjd && !snd_usb_validate_midi_desc(outjd)))
return -ENODEV;
if (injd && (injd->bLength < 5 ||
(injd->bJackType != USB_MS_EMBEDDED &&