general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 PID: 9 Comm: kworker/u4:0 Not tainted 6.2.0-syzkaller-10827-g489fa31ea873 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Workqueue: writeback wb_workfn (flush-7:1)
RIP: 0010:nilfs_clear_dirty_page+0xa9/0x1130 fs/nilfs2/page.c:388
Code: 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 eb fe 90 fe 48 8b 1b 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 c9 fe 90 fe 4c 8b 2b 49 8d 5d 28 48
RSP: 0018:ffffc900000e7060 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea000122cf00
RBP: ffffc900000e7130 R08: ffffffff81bba874 R09: fffff940002459e1
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffea000122cf00
R13: 0000000000000000 R14: dffffc0000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002051e000 CR3: 000000002a911000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 nilfs_clear_dirty_pages+0x1e0/0x370 fs/nilfs2/page.c:373
 nilfs_writepages+0x11c/0x160 fs/nilfs2/inode.c:165
 do_writepages+0x3a6/0x670 mm/page-writeback.c:2551
 __writeback_single_inode+0x1c4/0x15e0 fs/fs-writeback.c:1600
 writeback_sb_inodes+0x92c/0x1360 fs/fs-writeback.c:1891
 __writeback_inodes_wb+0x11b/0x260 fs/fs-writeback.c:1962
 wb_writeback+0x51c/0x1080 fs/fs-writeback.c:2067
 wb_check_start_all fs/fs-writeback.c:2189 [inline]
 wb_do_writeback fs/fs-writeback.c:2215 [inline]
 wb_workfn+0xaad/0x1100 fs/fs-writeback.c:2248
 process_one_work+0x915/0x13a0 kernel/workqueue.c:2390
 worker_thread+0xa63/0x1210 kernel/workqueue.c:2537
 kthread+0x270/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:nilfs_clear_dirty_page+0xa9/0x1130 fs/nilfs2/page.c:388
Code: 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 eb fe 90 fe 48 8b 1b 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 c9 fe 90 fe 4c 8b 2b 49 8d 5d 28 48
RSP: 0018:ffffc900000e7060 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea000122cf00
RBP: ffffc900000e7130 R08: ffffffff81bba874 R09: fffff940002459e1
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffea000122cf00
R13: 0000000000000000 R14: dffffc0000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020e93000 CR3: 000000002ab40000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	48 89 d8             	mov    %rbx,%rax
   3:	48 c1 e8 03          	shr    $0x3,%rax
   7:	42 80 3c 30 00       	cmpb   $0x0,(%rax,%r14,1)
   c:	74 08                	je     0x16
   e:	48 89 df             	mov    %rbx,%rdi
  11:	e8 eb fe 90 fe       	callq  0xfe90ff01
  16:	48 8b 1b             	mov    (%rbx),%rbx
  19:	48 89 d8             	mov    %rbx,%rax
  1c:	48 c1 e8 03          	shr    $0x3,%rax
  20:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  27:	fc ff df
* 2a:	80 3c 08 00          	cmpb   $0x0,(%rax,%rcx,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	48 89 df             	mov    %rbx,%rdi
  33:	e8 c9 fe 90 fe       	callq  0xfe90ff01
  38:	4c 8b 2b             	mov    (%rbx),%r13
  3b:	49 8d 5d 28          	lea    0x28(%r13),%rbx
  3f:	48                   	rex.W