mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-29 05:44:11 +00:00
ALSA: usb-audio: Fix an out-of-bounds bug in __snd_usb_parse_audio_interface()
There may be a bad USB audio device with a USB ID of (0x04fa, 0x4201) and the number of it's interfaces less than 4, an out-of-bounds read bug occurs when parsing the interface descriptor for this device. Fix this by checking the number of interfaces. Signed-off-by: Dongxiang Ke <kdx.glider@gmail.com> Link: https://lore.kernel.org/r/20220906024928.10951-1-kdx.glider@gmail.com Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
parent
8d44e6044a
commit
e53f47f6c1
1 changed files with 1 additions and 1 deletions
|
@ -1106,7 +1106,7 @@ static int __snd_usb_parse_audio_interface(struct snd_usb_audio *chip,
|
|||
* Dallas DS4201 workaround: It presents 5 altsettings, but the last
|
||||
* one misses syncpipe, and does not produce any sound.
|
||||
*/
|
||||
if (chip->usb_id == USB_ID(0x04fa, 0x4201))
|
||||
if (chip->usb_id == USB_ID(0x04fa, 0x4201) && num >= 4)
|
||||
num = 4;
|
||||
|
||||
for (i = 0; i < num; i++) {
|
||||
|
|
Loading…
Reference in a new issue