------------[ cut here ]------------
WARNING: CPU: 0 PID: 8679 at include/linux/backing-dev.h:335 inode_to_wb include/linux/backing-dev.h:335 [inline]
WARNING: CPU: 0 PID: 8679 at include/linux/backing-dev.h:335 account_page_dirtied+0x768/0x9d0 mm/page-writeback.c:2430
Modules linked in:
CPU: 0 PID: 8679 Comm: segctord Not tainted 5.9.0-rc6-next-20200924-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:inode_to_wb include/linux/backing-dev.h:335 [inline]
RIP: 0010:account_page_dirtied+0x768/0x9d0 mm/page-writeback.c:2430
Code: a8 01 00 00 be ff ff ff ff 48 8d 78 70 e8 f0 38 a4 06 31 ff 89 c3 89 c6 e8 25 26 db ff 85 db 0f 85 bb fa ff ff e8 b8 29 db ff <0f> 0b e9 af fa ff ff e8 ac 29 db ff 48 89 ee 4c 89 e7 e8 a1 d4 33
RSP: 0018:ffffc90006497888 EFLAGS: 00010093
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff819a07ab
RDX: ffff8880a1166100 RSI: ffffffff819a07b8 RDI: 0000000000000005
RBP: ffffea00025c3f00 R08: 0000000000000000 R09: ffffffff8bb4b74f
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88804800aa90
R13: ffff88804800ac38 R14: ffff88804800a8e0 R15: ffffea00025c3f08
FS:  0000000000000000(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000400200 CR3: 00000000a0eab000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __set_page_dirty+0x7f/0x400 fs/buffer.c:608
 mark_buffer_dirty+0x448/0x5d0 fs/buffer.c:1174
 nilfs_btree_propagate_p fs/nilfs2/btree.c:1890 [inline]
 nilfs_btree_propagate+0x4ae/0xea0 fs/nilfs2/btree.c:2086
 nilfs_bmap_propagate+0x73/0x170 fs/nilfs2/bmap.c:337
 nilfs_collect_dat_data+0x45/0xd0 fs/nilfs2/segment.c:630
 nilfs_segctor_apply_buffers+0x14a/0x470 fs/nilfs2/segment.c:1014
 nilfs_segctor_scan_file+0x3e4/0x700 fs/nilfs2/segment.c:1063
 nilfs_segctor_collect_blocks fs/nilfs2/segment.c:1229 [inline]
 nilfs_segctor_collect fs/nilfs2/segment.c:1499 [inline]
 nilfs_segctor_do_construct+0x16ee/0x6b10 fs/nilfs2/segment.c:2041
 nilfs_segctor_construct+0x7a7/0xb30 fs/nilfs2/segment.c:2377
 nilfs_segctor_thread_construct fs/nilfs2/segment.c:2485 [inline]
 nilfs_segctor_thread+0x3c3/0xf90 fs/nilfs2/segment.c:2568
 kthread+0x3af/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296