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ALSA: line6: Perform sanity check for each URB creation

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commit 6e8a914ad619042c5f25a4feb663357c4170fd8d upstream.

LINE6 drivers create stream URBs with a fixed pipe without checking
its validity, and this may lead to a kernel WARNING at the submission
when a malformed USB descriptor is passed.

For avoiding the kernel warning, perform the similar sanity checks for
each pipe type at creating a URB.

Reported-by: syzbot+c190f6858a04ea7fbc52@syzkaller.appspotmail.com
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/s5hv9iv4hq8.wl-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Takashi Iwai 2020-07-10 15:33:51 +02:00 committed by Greg Kroah-Hartman
parent 074a3ea55a
commit 5ca7b059ee
2 changed files with 4 additions and 0 deletions
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2
sound/usb/line6/capture.c
View file

@ -291,6 +291,8 @@ int line6_create_audio_in_urbs(struct snd_line6_pcm *line6pcm)
urb->interval = LINE6_ISO_INTERVAL;
urb->error_count = 0;
urb->complete = audio_in_callback;
if (usb_urb_ep_type_check(urb))
return -EINVAL;
}
return 0;

2
sound/usb/line6/playback.c
View file

@ -436,6 +436,8 @@ int line6_create_audio_out_urbs(struct snd_line6_pcm *line6pcm)
urb->interval = LINE6_ISO_INTERVAL;
urb->error_count = 0;
urb->complete = audio_out_callback;
if (usb_urb_ep_type_check(urb))
return -EINVAL;
}
return 0;