linux-kernel - [syzbot] WARNING in nilfs_sufile_set_segment

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Message-ID: <0000000000002052a505e9ec7d41@google.com>
Date:   Fri, 30 Sep 2022 15:26:44 -0700
From:   syzbot <syzbot+14e9f834f6ddecece094@...kaller.appspotmail.com>
To:     konishi.ryusuke@...il.com, linux-kernel@...r.kernel.org,
        linux-nilfs@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: [syzbot] WARNING in nilfs_sufile_set_segment_usage

Hello,

syzbot found the following issue on:

HEAD commit:    987a926c1d8a Merge tag 'pull-fixes' of git://git.kernel.or..
git tree:       upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=10b2f7df080000
kernel config:  https://syzkaller.appspot.com/x/.config?x=ba0d23aa7e1ffaf5
dashboard link: https://syzkaller.appspot.com/bug?extid=14e9f834f6ddecece094
compiler:       Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11369198880000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=14aec750880000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/3f613b00c57b/disk-987a926c.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/92e205364bcf/vmlinux-987a926c.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+14e9f834f6ddecece094@...kaller.appspotmail.com

NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
------------[ cut here ]------------
WARNING: CPU: 0 PID: 3618 at fs/nilfs2/sufile.c:531 nilfs_sufile_set_segment_usage+0x4d8/0x5c0
Modules linked in:
CPU: 0 PID: 3618 Comm: segctord Not tainted 6.0.0-rc7-syzkaller-00132-g987a926c1d8a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
RIP: 0010:nilfs_sufile_set_segment_usage+0x4d8/0x5c0 fs/nilfs2/sufile.c:531
Code: 25 28 00 00 00 48 3b 84 24 a0 00 00 00 0f 85 fa 00 00 00 44 89 f8 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 68 3b 3d fe <0f> 0b e9 1a fe ff ff e8 5c 3b 3d fe e8 57 38 b6 fd e9 ca fe ff ff
RSP: 0018:ffffc9000394f620 EFLAGS: 00010293
RAX: ffffffff834a4e18 RBX: 0000000000000004 RCX: ffff88802831bb00
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000
RBP: ffffc9000394f710 R08: ffffffff834a4c21 R09: ffffffff83459693
R10: 0000000000000002 R11: ffff88802831bb00 R12: 0000000000000050
R13: ffff888021f86000 R14: 1ffff92000729ed0 R15: ffff888071d0a160
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561c6b8abb68 CR3: 0000000021cc6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 nilfs_segctor_update_segusage fs/nilfs2/segment.c:1441 [inline]
 nilfs_segctor_do_construct+0x4b4a/0x6fe0 fs/nilfs2/segment.c:2065
 nilfs_segctor_construct+0x143/0x8d0 fs/nilfs2/segment.c:2375
 nilfs_segctor_thread_construct fs/nilfs2/segment.c:2483 [inline]
 nilfs_segctor_thread+0x534/0x1180 fs/nilfs2/segment.c:2566
 kthread+0x266/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>


---
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