From: Takashi Iwai <tiwai@xxxxxxx> 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@xxxxxxxxxxxxxxxxxxxxxxxxx Cc: <stable@xxxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/s5hv9iv4hq8.wl-tiwai@xxxxxxx Signed-off-by: Takashi Iwai <tiwai@xxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- sound/usb/line6/capture.c | 2 ++ sound/usb/line6/playback.c | 2 ++ 2 files changed, 4 insertions(+) --- a/sound/usb/line6/capture.c +++ b/sound/usb/line6/capture.c @@ -291,6 +291,8 @@ int line6_create_audio_in_urbs(struct sn 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; --- a/sound/usb/line6/playback.c +++ b/sound/usb/line6/playback.c @@ -436,6 +436,8 @@ int line6_create_audio_out_urbs(struct s 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;
