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nfc: port100: handle command failure cleanly 

If starting the transfer of a command suceeds but the transfer for the reply
fails, it is not enough to initiate killing the transfer for the
command may still be running. You need to wait for the killing to finish
before you can reuse URB and buffer.

Reported-and-tested-by: syzbot+711468aa5c3a1eabf863@syzkaller.appspotmail.com
Signed-off-by: Oliver Neukum <oneukum@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Oliver Neukum 2019-11-21 11:37:10 +01:00 committed by David S. Miller
parent 48a322b6f9
commit 5f9f0b11f0
1 changed files with 1 additions and 1 deletions
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2
drivers/nfc/port100.c
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@ -783,7 +783,7 @@ static int port100_send_frame_async(struct port100 *dev, struct sk_buff *out,
rc = port100_submit_urb_for_ack(dev, GFP_KERNEL);
if (rc)
usb_unlink_urb(dev->out_urb);
usb_kill_urb(dev->out_urb);
exit:
mutex_unlock(&dev->out_urb_lock);