linux-kernel - [syzbot] [mm?] [fs?] WARNING in __folio_mark

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Message-ID: <00000000000023a79f05f5c4ac51@google.com>
Date:   Tue, 28 Feb 2023 07:58:53 -0800
From:   syzbot <syzbot+e14d6cd6ec241f507ba7@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        syzkaller-bugs@...glegroups.com, willy@...radead.org
Subject: [syzbot] [mm?] [fs?] WARNING in __folio_mark_dirty (2)

Hello,

syzbot found the following issue on:

HEAD commit:    2fcd07b7ccd5 mm/mprotect: Fix successful vma_merge() of ne..
git tree:       upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=117bdb18c80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=2e0edbbd23e5eb14
dashboard link: https://syzkaller.appspot.com/bug?extid=e14d6cd6ec241f507ba7
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1247507f480000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=166fefd8c80000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/89d18c9cc43c/disk-2fcd07b7.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/a91767bc5caa/vmlinux-2fcd07b7.xz
kernel image: https://storage.googleapis.com/syzbot-assets/90ba2476f5c1/bzImage-2fcd07b7.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/813b7d7d9dcd/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e14d6cd6ec241f507ba7@...kaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 0 PID: 5081 at include/linux/backing-dev.h:253 inode_to_wb include/linux/backing-dev.h:253 [inline]
WARNING: CPU: 0 PID: 5081 at include/linux/backing-dev.h:253 folio_account_dirtied mm/page-writeback.c:2656 [inline]
WARNING: CPU: 0 PID: 5081 at include/linux/backing-dev.h:253 __folio_mark_dirty+0xbcb/0xfa0 mm/page-writeback.c:2707
Modules linked in:
CPU: 0 PID: 5081 Comm: syz-executor253 Not tainted 6.2.0-syzkaller-12018-g2fcd07b7ccd5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
RIP: 0010:inode_to_wb include/linux/backing-dev.h:253 [inline]
RIP: 0010:folio_account_dirtied mm/page-writeback.c:2656 [inline]
RIP: 0010:__folio_mark_dirty+0xbcb/0xfa0 mm/page-writeback.c:2707
Code: 78 70 48 89 44 24 10 e8 73 f4 63 08 31 ff 89 c6 89 44 24 10 e8 46 78 d1 ff 8b 44 24 10 85 c0 0f 85 42 f9 ff ff e8 e5 7b d1 ff <0f> 0b e9 36 f9 ff ff e8 d9 7b d1 ff e8 64 a0 b9 ff 31 ff 41 89 c4
RSP: 0018:ffffc9000404fa28 EFLAGS: 00010093
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff88802b47ba80 RSI: ffffffff81b3867b RDI: 0000000000000005
RBP: ffffea0001f93c80 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000003 R12: 0000000000000001
R13: ffffffff8e7847c0 R14: 0000000000000293 R15: ffff88802a46cc50
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd66b0fb000 CR3: 000000000c571000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 mark_buffer_dirty+0x3e8/0x570 fs/buffer.c:1148
 gfs2_unpin+0x109/0xcf0 fs/gfs2/lops.c:111
 buf_lo_after_commit+0x144/0x210 fs/gfs2/lops.c:747
 lops_after_commit fs/gfs2/lops.h:49 [inline]
 gfs2_log_flush+0x140f/0x2900 fs/gfs2/log.c:1116
 gfs2_kill_sb+0x6a/0x430 fs/gfs2/ops_fstype.c:1789
 deactivate_locked_super+0x98/0x160 fs/super.c:331
 deactivate_super+0xb1/0xd0 fs/super.c:362
 cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1177
 task_work_run+0x16f/0x270 kernel/task_work.c:179
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xad3/0x2a40 kernel/exit.c:869
 do_group_exit+0xd4/0x2a0 kernel/exit.c:1019
 __do_sys_exit_group kernel/exit.c:1030 [inline]
 __se_sys_exit_group kernel/exit.c:1028 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1028
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7efcc6afa9c9
Code: Unable to access opcode bytes at 0x7efcc6afa99f.
RSP: 002b:00007ffcfb592d38 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007efcc6ba7330 RCX: 00007efcc6afa9c9
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001
RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007efcc6ba1e40
R10: 00007ffcfb592c50 R11: 0000000000000246 R12: 00007efcc6ba7330
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001
 </TASK>


---
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