syzbot suspects this issue was fixed by commit:
commit 8d1ddb5e79374fb277985a6b3faa2ed8631c5b4c
Author: Boqun Feng <[email protected]>
Date: Thu Nov 5 06:23:51 2020 +0000
fcntl: Fix potential deadlock in send_sig{io, urg}()
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=17455db4d00000
start commit: 7b1b868e Merge tag 'for-linus' of git://git.kernel.org/pub..
git tree: upstream
kernel config: https://syzkaller.appspot.com/x/.config?x=3416bb960d5c705d
dashboard link: https://syzkaller.appspot.com/bug?extid=907b8537e3b0e55151fc
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=163e046b500000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12f8b623500000
If the result looks correct, please mark the issue as fixed by replying with:
#syz fix: fcntl: Fix potential deadlock in send_sig{io, urg}()
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
