From: syzbot <syzbot+effe7da6578cd423f98f@syzkaller.appspotmail.com>
To: brauner@kernel.org, chao@kernel.org, jack@suse.cz,
jaegeuk@kernel.org, kent.overstreet@linux.dev,
linux-bcachefs@vger.kernel.org,
linux-f2fs-devel@lists.sourceforge.net,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk
Subject: Re: [syzbot] [f2fs?] INFO: task hung in do_truncate (3)
Date: Wed, 23 Apr 2025 00:49:33 -0700 [thread overview]
Message-ID: <68089b8d.050a0220.36a438.000a.GAE@google.com> (raw)
In-Reply-To: <675101f3.050a0220.17bd51.0081.GAE@google.com>
syzbot has found a reproducer for the following issue on:
HEAD commit: bc3372351d0c Merge tag 'for-6.15-rc3-tag' of git://git.ker..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=138cdccc580000
kernel config: https://syzkaller.appspot.com/x/.config?x=3bbffc3b5b4301e1
dashboard link: https://syzkaller.appspot.com/bug?extid=effe7da6578cd423f98f
compiler: Debian clang version 15.0.6, Debian LLD 15.0.6
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17c8ac70580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/6c893a6bd7cc/disk-bc337235.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/6c31d81cbcae/vmlinux-bc337235.xz
kernel image: https://storage.googleapis.com/syzbot-assets/acf5d144656b/bzImage-bc337235.xz
mounted in repro #1: https://storage.googleapis.com/syzbot-assets/53b1b110f131/mount_0.gz
fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=16d4f204580000)
mounted in repro #2: https://storage.googleapis.com/syzbot-assets/3185ba5a394f/mount_4.gz
fsck result: OK (log: https://syzkaller.appspot.com/x/fsck.log?x=14ebe7ac580000)
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+effe7da6578cd423f98f@syzkaller.appspotmail.com
INFO: task syz.9.68:6713 blocked for more than 143 seconds.
Not tainted 6.15.0-rc3-syzkaller-00019-gbc3372351d0c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.9.68 state:D stack:27592 pid:6713 tgid:6701 ppid:6519 task_flags:0x400140 flags:0x00004006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b33/0x51f0 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6860
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6917
rwsem_down_write_slowpath+0xedd/0x1420 kernel/locking/rwsem.c:1176
__down_write_common kernel/locking/rwsem.c:1304 [inline]
__down_write kernel/locking/rwsem.c:1313 [inline]
down_write+0x1da/0x220 kernel/locking/rwsem.c:1578
inode_lock include/linux/fs.h:867 [inline]
do_truncate+0x20e/0x310 fs/open.c:63
vfs_truncate+0x4a6/0x540 fs/open.c:115
do_sys_truncate+0xd8/0x190 fs/open.c:138
__do_sys_truncate fs/open.c:150 [inline]
__se_sys_truncate fs/open.c:148 [inline]
__x64_sys_truncate+0x5b/0x70 fs/open.c:148
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf3/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6c9918e169
RSP: 002b:00007f6c983dd038 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
RAX: ffffffffffffffda RBX: 00007f6c993b6080 RCX: 00007f6c9918e169
RDX: 0000000000000000 RSI: 0000000000008001 RDI: 00002000000000c0
RBP: 00007f6c99210a68 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f6c993b6080 R15: 00007ffc2675ba78
---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
next parent reply other threads:[~2025-04-23 7:49 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <675101f3.050a0220.17bd51.0081.GAE@google.com>
2025-04-23 7:49 ` syzbot [this message]
2025-04-23 21:05 ` [syzbot] [f2fs?] INFO: task hung in do_truncate (3) Kane York
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