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nfc: port100: handle command failure cleanly

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commit 5f9f0b11f0816b35867f2cf71e54d95f53f03902 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Oliver Neukum 2019-11-21 11:37:10 +01:00 committed by Greg Kroah-Hartman
parent deb7719f05
commit 81f48ce6d8
1 changed files with 1 additions and 1 deletions
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2
drivers/nfc/port100.c
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@ -791,7 +791,7 @@ 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);