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ALSA: usb-audio: Fix incorrect NULL check in create_yamaha_midi_quirk() 

The commit 60849562a5 ("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: 60849562a5 ("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>
This commit is contained in:
Takashi Iwai 2019-11-13 12:12:59 +01:00
parent f5cdc9d400
commit cc9dbfa970
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
sound/usb/quirks.c
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@ -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 &&