Re: [syzbot] [fs?] INFO: task hung in pipe_release (4)

From: Jakub Kicinski
Date: Tue Jul 18 2023 - 19:07:50 EST


On Wed, 12 Jul 2023 11:54:33 -0700 syzbot wrote:
> syzbot has bisected this issue to:
>
> commit 7ac7c987850c3ec617c778f7bd871804dc1c648d
> Author: David Howells <dhowells@xxxxxxxxxx>
> Date: Mon May 22 12:11:22 2023 +0000
>
> udp: Convert udp_sendpage() to use MSG_SPLICE_PAGES
>
> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15853bcaa80000
> start commit: 3f01e9fed845 Merge tag 'linux-watchdog-6.5-rc2' of git://w..
> git tree: upstream
> final oops: https://syzkaller.appspot.com/x/report.txt?x=17853bcaa80000
> console output: https://syzkaller.appspot.com/x/log.txt?x=13853bcaa80000
> kernel config: https://syzkaller.appspot.com/x/.config?x=150188feee7071a7
> dashboard link: https://syzkaller.appspot.com/bug?extid=f527b971b4bdc8e79f9e
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12a86682a80000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1520ab6ca80000
>
> Reported-by: syzbot+f527b971b4bdc8e79f9e@xxxxxxxxxxxxxxxxxxxxxxxxx
> Fixes: 7ac7c987850c ("udp: Convert udp_sendpage() to use MSG_SPLICE_PAGES")
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

Hi David, any ideas about this one? Looks like it triggers on fairly
recent upstream?