diff options
| author | Takashi Iwai <tiwai@suse.de> | 2017-10-04 15:03:40 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2017-10-11 15:14:49 +0200 |
| commit | 6815a0b444572527256f0d0efd8efe3ddede6018 (patch) | |
| tree | 4ce0bcd84bf6931a1e7e2d018b7c44580cde1e2d /Documentation/bt8xxgpio.txt | |
| parent | usb: core: Add a helper function to check the validity of EP type in URB (diff) | |
| download | linux-6815a0b444572527256f0d0efd8efe3ddede6018.tar.xz linux-6815a0b444572527256f0d0efd8efe3ddede6018.zip | |
ALSA: bcd2000: Add a sanity check for invalid EPs
As syzkaller spotted, currently bcd2000 driver submits a URB with the
fixed EP without checking whether it's actually available, which may
result in a kernel warning like:
usb 1-1: BOGUS urb xfer, pipe 1 != type 3
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1846 at drivers/usb/core/urb.c:449
usb_submit_urb+0xf8a/0x11d0
Modules linked in:
CPU: 0 PID: 1846 Comm: kworker/0:2 Not tainted
4.14.0-rc2-42613-g1488251d1a98 #238
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
Workqueue: usb_hub_wq hub_event
Call Trace:
bcd2000_init_device sound/usb/bcd2000/bcd2000.c:289
bcd2000_init_midi sound/usb/bcd2000/bcd2000.c:345
bcd2000_probe+0xe64/0x19e0 sound/usb/bcd2000/bcd2000.c:406
usb_probe_interface+0x35d/0x8e0 drivers/usb/core/driver.c:361
....
This patch adds a sanity check of validity of EPs at the device
initialization phase for avoiding the call with an invalid EP.
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'Documentation/bt8xxgpio.txt')
0 files changed, 0 insertions, 0 deletions