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author | Takashi Iwai <tiwai@suse.de> | 2017-10-04 15:09:24 +0200 |
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committer | Takashi Iwai <tiwai@suse.de> | 2017-10-11 15:14:50 +0200 |
commit | 2a4340c57717162c6bf07a0860d05711d4de994b (patch) | |
tree | c4fa6bde2597a708627132d64de8018995d13983 /sound/usb/midi.c | |
parent | 58fc7f73a85d45a47057dad2af53502fdf6cf778 (diff) | |
download | linux-2a4340c57717162c6bf07a0860d05711d4de994b.tar.gz linux-2a4340c57717162c6bf07a0860d05711d4de994b.tar.bz2 linux-2a4340c57717162c6bf07a0860d05711d4de994b.zip |
ALSA: line6: Add a sanity check for invalid EPs
As syzkaller spotted, currently line6 drivers submit 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 3 != type 1
------------[ cut here ]------------
WARNING: CPU: 0 PID: 24 at drivers/usb/core/urb.c:449
usb_submit_urb+0xf8a/0x11d0
Modules linked in:
CPU: 0 PID: 24 Comm: kworker/0:1 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:
line6_start_listen+0x55f/0x9e0 sound/usb/line6/driver.c:82
line6_init_cap_control sound/usb/line6/driver.c:690
line6_probe+0x7c9/0x1310 sound/usb/line6/driver.c:764
podhd_probe+0x64/0x70 sound/usb/line6/podhd.c:474
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 'sound/usb/midi.c')
0 files changed, 0 insertions, 0 deletions