From: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx> Date: Wed, 18 Jul 2018 18:57:27 +0900 > syzbot is reporting stalls at nfc_llcp_send_ui_frame() [1]. This is > because nfc_llcp_send_ui_frame() is retrying the loop without any delay > when nonblocking nfc_alloc_send_skb() returned NULL. > > Since there is no need to use MSG_DONTWAIT if we retry until > sock_alloc_send_pskb() succeeds, let's use blocking call. > Also, in case an unexpected error occurred, let's break the loop > if blocking nfc_alloc_send_skb() failed. > > [1] https://syzkaller.appspot.com/bug?id=4a131cc571c3733e0eff6bc673f4e36ae48f19c6 > > Signed-off-by: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx> > Reported-by: syzbot <syzbot+d29d18215e477cfbfbdd@xxxxxxxxxxxxxxxxxxxxxxxxx> Applied and queued up for -stable, thanks.
