linux-kernel - Re: [syzbot] [fs?] INFO: task hung in pipe

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Message-ID: <0000000000001416bb06004ebf53@google.com>
Date:   Wed, 12 Jul 2023 11:54:33 -0700
From:   syzbot <syzbot+f527b971b4bdc8e79f9e@...kaller.appspotmail.com>
To:     bpf@...r.kernel.org, brauner@...nel.org, davem@...emloft.net,
        dhowells@...hat.com, dsahern@...nel.org, edumazet@...gle.com,
        kuba@...nel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        pabeni@...hat.com, syzkaller-bugs@...glegroups.com,
        viro@...iv.linux.org.uk
Subject: Re: [syzbot] [fs?] INFO: task hung in pipe_release (4)

syzbot has bisected this issue to:

commit 7ac7c987850c3ec617c778f7bd871804dc1c648d
Author: David Howells <dhowells@...hat.com>
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@...kaller.appspotmail.com
Fixes: 7ac7c987850c ("udp: Convert udp_sendpage() to use MSG_SPLICE_PAGES")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection