From: Pavel Begunkov <asml.silence@gmail.com>
To: syzbot <syzbot+a8cdfe2d8ad35db3a7fd@syzkaller.appspotmail.com>,
anna-maria@linutronix.de, axboe@kernel.dk, brauner@kernel.org,
frederic@kernel.org, gregkh@linuxfoundation.org,
hdanton@sina.com, io-uring@vger.kernel.org, jack@suse.cz,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
luto@kernel.org, peterz@infradead.org,
syzkaller-bugs@googlegroups.com, tglx@linutronix.de,
tj@kernel.org, viro@zeniv.linux.org.uk
Subject: Re: [syzbot] [fs?] INFO: task hung in do_coredump (3)
Date: Tue, 8 Jul 2025 09:24:18 +0100 [thread overview]
Message-ID: <9bfb10a9-0400-461f-af4d-54946455e74c@gmail.com> (raw)
In-Reply-To: <686bf556.a70a0220.29fe6c.0b0e.GAE@google.com>
On 7/7/25 17:27, syzbot wrote:
> syzbot has bisected this issue to:
>
> commit 2af89abda7d9c2aeb573677e2c498ddb09f8058a
> Author: Pavel Begunkov <asml.silence@gmail.com>
> Date: Thu Aug 24 22:53:32 2023 +0000
>
> io_uring: add option to remove SQ indirection
Doesn't look like the cause, the previous repro from 28 Oct 2024 didn't
even have any io_uring, and the patch only reduces sizes of some
allocations. The common part b/w programs is
prctl(PR_SET_SYSCALL_USER_DISPATCH_ON), might be related to that.
> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=14ec9582580000
> start commit: 05df91921da6 Merge tag 'v6.16-rc4-smb3-client-fixes' of gi..
> git tree: upstream
> final oops: https://syzkaller.appspot.com/x/report.txt?x=16ec9582580000
> console output: https://syzkaller.appspot.com/x/log.txt?x=12ec9582580000
> kernel config: https://syzkaller.appspot.com/x/.config?x=45bd916a213c79bb
> dashboard link: https://syzkaller.appspot.com/bug?extid=a8cdfe2d8ad35db3a7fd
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11a2228c580000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16d48bd4580000
>
> Reported-by: syzbot+a8cdfe2d8ad35db3a7fd@syzkaller.appspotmail.com
> Fixes: 2af89abda7d9 ("io_uring: add option to remove SQ indirection")
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection
--
Pavel Begunkov
prev parent reply other threads:[~2025-07-08 8:22 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <6710d2a2.050a0220.d9b66.0189.GAE@google.com>
2025-07-07 16:27 ` [syzbot] [fs?] INFO: task hung in do_coredump (3) syzbot
2025-07-08 8:24 ` Pavel Begunkov [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=9bfb10a9-0400-461f-af4d-54946455e74c@gmail.com \
--to=asml.silence@gmail.com \
--cc=anna-maria@linutronix.de \
--cc=axboe@kernel.dk \
--cc=brauner@kernel.org \
--cc=frederic@kernel.org \
--cc=gregkh@linuxfoundation.org \
--cc=hdanton@sina.com \
--cc=io-uring@vger.kernel.org \
--cc=jack@suse.cz \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=luto@kernel.org \
--cc=peterz@infradead.org \
--cc=syzbot+a8cdfe2d8ad35db3a7fd@syzkaller.appspotmail.com \
--cc=syzkaller-bugs@googlegroups.com \
--cc=tglx@linutronix.de \
--cc=tj@kernel.org \
--cc=viro@zeniv.linux.org.uk \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox