0ca78c9965
[ Upstream commit 9dab880d675b9d0dd56c6428e4e8352a3339371d ]
Fix a use-after-free that occurs in hcd when in_urb sent from
pn533_usb_send_frame() is completed earlier than out_urb. Its callback
frees the skb data in pn533_send_async_complete() that is used as a
transfer buffer of out_urb. Wait before sending in_urb until the
callback of out_urb is called. To modify the callback of out_urb alone,
separate the complete function of out_urb and ack_urb.
Found by a modified version of syzkaller.
BUG: KASAN: use-after-free in dummy_timer
Call Trace:
memcpy (mm/kasan/shadow.c:65)
dummy_perform_transfer (drivers/usb/gadget/udc/dummy_hcd.c:1352)
transfer (drivers/usb/gadget/udc/dummy_hcd.c:1453)
dummy_timer (drivers/usb/gadget/udc/dummy_hcd.c:1972)
arch_static_branch (arch/x86/include/asm/jump_label.h:27)
static_key_false (include/linux/jump_label.h:207)
timer_expire_exit (include/trace/events/timer.h:127)
call_timer_fn (kernel/time/timer.c:1475)
expire_timers (kernel/time/timer.c:1519)
__run_timers (kernel/time/timer.c:1790)
run_timer_softirq (kernel/time/timer.c:1803)
Fixes:
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|---|---|---|
| .. | ||
| i2c.c | ||
| Kconfig | ||
| Makefile | ||
| pn533.c | ||
| pn533.h | ||
| uart.c | ||
| usb.c | ||