From: Al Viro <viro@zeniv.linux.org.uk>
To: syzbot <syzbot+1ec0f904ba50d06110b1@syzkaller.appspotmail.com>
Cc: andrii@kernel.org, ast@kernel.org, bigeasy@linutronix.de,
bpf@vger.kernel.org, brauner@kernel.org, daniel@iogearbox.net,
davem@davemloft.net, eddyz87@gmail.com, edumazet@google.com,
haoluo@google.com, jack@suse.cz, jiri@resnulli.us,
john.fastabend@gmail.com, jolsa@kernel.org,
kerneljasonxing@gmail.com, kpsingh@kernel.org, kuba@kernel.org,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, martin.lau@linux.dev, netdev@vger.kernel.org,
pabeni@redhat.com, sdf@fomichev.me, song@kernel.org,
syzkaller-bugs@googlegroups.com, tglx@linutronix.de,
yonghong.song@linux.dev
Subject: Re: [syzbot] [mm?] INFO: rcu detected stall in sys_umount (3)
Date: Mon, 18 Aug 2025 19:26:16 +0100 [thread overview]
Message-ID: <20250818182616.GB222315@ZenIV> (raw)
In-Reply-To: <68a2f584.050a0220.e29e5.009d.GAE@google.com>
On Mon, Aug 18, 2025 at 02:42:28AM -0700, syzbot wrote:
> syzbot has found a reproducer for the following issue on:
>
> HEAD commit: 8f5ae30d69d7 Linux 6.17-rc1
> git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
> console output: https://syzkaller.appspot.com/x/log.txt?x=1321eba2580000
> kernel config: https://syzkaller.appspot.com/x/.config?x=8c5ac3d8b8abfcb
> dashboard link: https://syzkaller.appspot.com/bug?extid=1ec0f904ba50d06110b1
> compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
> userspace arch: arm64
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10cba442580000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10a1eba2580000
>
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/18a2e4bd0c4a/disk-8f5ae30d.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/3b5395881b25/vmlinux-8f5ae30d.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/e875f4e3b7ff/Image-8f5ae30d.gz.xz
> mounted in repro: https://storage.googleapis.com/syzbot-assets/43186d9e448c/mount_0.gz
> fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=174ba442580000)
>
> The issue was bisected to:
>
> commit d15121be7485655129101f3960ae6add40204463
> Author: Paolo Abeni <pabeni@redhat.com>
> Date: Mon May 8 06:17:44 2023 +0000
>
> Revert "softirq: Let ksoftirqd do its job"
Would be interesting to see how it behaves on
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git #fixes (cda250b0fc83)
prev parent reply other threads:[~2025-08-18 18:26 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-08 8:40 syzbot
2025-01-27 15:31 ` syzbot
2025-08-18 9:42 ` syzbot
2025-08-18 18:26 ` Al Viro [this message]
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