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From:   Hao Sun <sunhao.th@gmail.com>
Date:   Wed, 10 Nov 2021 09:20:38 +0800
Message-ID: <CACkBjsasF+eDp4_dtvTBr9Thg-9RyYOQg3nwvRFuu+r3XecHig@mail.gmail.com>
Subject: WARNING in __folio_mark_dirty
To:     konishi.ryusuke@gmail.com, linux-nilfs@vger.kernel.org,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        akpm@linux-foundation.org, Linux MM <linux-mm@kvack.org>
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Hello,

When using Healer to fuzz the latest Linux kernel, the following crash
was triggered.

HEAD commit: 6b75d88fa81b Merge branch 'i2c/for-current'
git tree: upstream
console output: https://paste.ubuntu.com/p/C22bhzvZP6/
kernel config: https://paste.ubuntu.com/p/b62Hp7BfJn/
C reproducer: https://paste.ubuntu.com/p/2mchRNDJr4/
Syzlang reproducer: https://paste.ubuntu.com/p/xM3DQ2f5Qz/

If you fix this issue, please add the following tag to the commit:
Reported-by: Hao Sun <sunhao.th@gmail.com>

NILFS (loop10): segctord starting. Construction interval = 5 seconds,
CP frequency < 30 seconds
------------[ cut here ]------------
WARNING: CPU: 3 PID: 18327 at include/linux/backing-dev.h:269
inode_to_wb include/linux/backing-dev.h:269 [inline]
WARNING: CPU: 3 PID: 18327 at include/linux/backing-dev.h:269
folio_account_dirtied mm/page-writeback.c:2460 [inline]
WARNING: CPU: 3 PID: 18327 at include/linux/backing-dev.h:269
__folio_mark_dirty+0xab2/0xe80 mm/page-writeback.c:2509
Modules linked in:
CPU: 3 PID: 18327 Comm: segctord Not tainted 5.15.0+ #6
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.13.0-1ubuntu1.1 04/01/2014
RIP: 0010:inode_to_wb include/linux/backing-dev.h:269 [inline]
RIP: 0010:folio_account_dirtied mm/page-writeback.c:2460 [inline]
RIP: 0010:__folio_mark_dirty+0xab2/0xe80 mm/page-writeback.c:2509
Code: ff ff ff 48 8d 78 70 e8 8c 69 96 07 31 ff 89 c6 89 44 24 10 e8
ff 52 d8 ff 8b 44 24 10 85 c0 0f 85 13 fa ff ff e8 8e 51 d8 ff <0f> 0b
e9 07 fa ff ff e8 82 51 d8 ff e8 9d 6a 96 07 31 ff 41 89 c7
RSP: 0018:ffffc900076ef7c0 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff88802c478378 RCX: ffff88802fc33980
RDX: 0000000000000000 RSI: ffff88802fc33980 RDI: 0000000000000002
RBP: ffffea0000b7ca80 R08: ffffffff819f0012 R09: 0000000000000000
R10: 0000000000000005 R11: fffff9400016f950 R12: 0000000000000246
R13: ffff88802c478138 R14: 0000000000000001 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff888135d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056054d573c18 CR3: 0000000021c4e000 CR4: 0000000000350ee0
Call Trace:
<TASK>
__set_page_dirty include/linux/pagemap.h:784 [inline]
mark_buffer_dirty+0x501/0x6a0 fs/buffer.c:1108
nilfs_btree_propagate_p fs/nilfs2/btree.c:1889 [inline]
nilfs_btree_propagate+0x4ba/0xce0 fs/nilfs2/btree.c:2085
nilfs_bmap_propagate+0x73/0x170 fs/nilfs2/bmap.c:337
nilfs_collect_dat_data+0x45/0xd0 fs/nilfs2/segment.c:625
nilfs_segctor_apply_buffers+0x149/0x480 fs/nilfs2/segment.c:1009
nilfs_segctor_scan_file+0x3d9/0x570 fs/nilfs2/segment.c:1058
nilfs_segctor_collect_blocks+0xa33/0x2fb0 fs/nilfs2/segment.c:1224
nilfs_segctor_collect fs/nilfs2/segment.c:1494 [inline]
nilfs_segctor_do_construct+0x1228/0x5ef0 fs/nilfs2/segment.c:2036
nilfs_segctor_construct+0x79f/0xb10 fs/nilfs2/segment.c:2372
nilfs_segctor_thread_construct fs/nilfs2/segment.c:2480 [inline]
nilfs_segctor_thread+0x3be/0xe40 fs/nilfs2/segment.c:2563
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
</TASK>