 BH[1] ffff888117614658: cnt=1 block#=43 state=0x1b
 BH[2] ffff888117614cb0: cnt=1 block#=44 state=0x1b
 BH[3] ffff888117614bc8: cnt=0 block#=18446744073709551615 state=0x0
------------[ cut here ]------------
kernel BUG at fs/nilfs2/page.c:262!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 11518 Comm: syz.9.1269 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:nilfs_copy_dirty_pages+0x5af/0x610
Code: 41 5d 41 5e 41 5f 5d e9 3f 92 fc 07 cc e8 99 1c 17 fe e9 67 ff ff ff e8 3f 9c f9 07 e8 8a 1c 17 fe 4c 89 e7 e8 f2 f7 ff ff 90 <0f> 0b e8 7a 1c 17 fe 4c 89 e7 48 c7 c6 a0 07 11 8c e8 3b 86 79 fd
RSP: 0018:ffffc900038974e0 EFLAGS: 00010287
RAX: ffffffff83ae81a4 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc9000a2d6000 RSI: 00000000000026e1 RDI: 00000000000026e2
RBP: ffffc900038976f8 R08: ffffc90003897227 R09: 1ffff92000712e44
R10: dffffc0000000000 R11: fffff52000712e45 R12: ffffea000072e740
R13: 0000000000000001 R14: dffffc0000000000 R15: ffffea000072e748
FS:  00007fd2cd7ff6c0(0000) GS:ffff88818dc90000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe71e8c5000 CR3: 000000001c75a000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 nilfs_mdt_save_to_shadow_map+0xbb/0x1c0
 nilfs_clean_segments+0x162/0xa50
 nilfs_ioctl+0x261f/0x2780
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd2cc99cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd2cd7ff028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd2ccc16180 RCX: 00007fd2cc99cdd9
RDX: 0000200000000000 RSI: 0000000040786e88 RDI: 0000000000000004
RBP: 00007fd2cca32d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd2ccc16218 R14: 00007fd2ccc16180 R15: 00007ffc24fc1868
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:nilfs_copy_dirty_pages+0x5af/0x610
Code: 41 5d 41 5e 41 5f 5d e9 3f 92 fc 07 cc e8 99 1c 17 fe e9 67 ff ff ff e8 3f 9c f9 07 e8 8a 1c 17 fe 4c 89 e7 e8 f2 f7 ff ff 90 <0f> 0b e8 7a 1c 17 fe 4c 89 e7 48 c7 c6 a0 07 11 8c e8 3b 86 79 fd
RSP: 0018:ffffc900038974e0 EFLAGS: 00010287
RAX: ffffffff83ae81a4 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc9000a2d6000 RSI: 00000000000026e1 RDI: 00000000000026e2
RBP: ffffc900038976f8 R08: ffffc90003897227 R09: 1ffff92000712e44
R10: dffffc0000000000 R11: fffff52000712e45 R12: ffffea000072e740
R13: 0000000000000001 R14: dffffc0000000000 R15: ffffea000072e748
FS:  00007fd2cd7ff6c0(0000) GS:ffff88818dc90000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005615b63f5068 CR3: 000000001c75a000 CR4: 00000000000006f0
