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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> |
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.. | ||
6fire | ||
bcd2000 | ||
caiaq | ||
hiface | ||
line6 | ||
misc | ||
usx2y | ||
card.c | ||
card.h | ||
clock.c | ||
clock.h | ||
debug.h | ||
endpoint.c | ||
endpoint.h | ||
format.c | ||
format.h | ||
helper.c | ||
helper.h | ||
Kconfig | ||
Makefile | ||
midi.c | ||
midi.h | ||
mixer.c | ||
mixer.h | ||
mixer_maps.c | ||
mixer_quirks.c | ||
mixer_quirks.h | ||
mixer_scarlett.c | ||
mixer_scarlett.h | ||
mixer_us16x08.c | ||
mixer_us16x08.h | ||
pcm.c | ||
pcm.h | ||
power.h | ||
proc.c | ||
proc.h | ||
quirks-table.h | ||
quirks.c | ||
quirks.h | ||
stream.c | ||
stream.h | ||
usbaudio.h |