nfc: pn533: Wait for out_urb's completion in pn533_usb_send_frame()

[ 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: c46ee38620a2 ("NFC: pn533: add NXP pn533 nfc device driver")
Signed-off-by: Minsuk Kang <linuxlovemin@yonsei.ac.kr>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

0 files changed, 0 insertions, 0 deletions