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: 4688 Comm: f2fs_ckpt-7:0 Not tainted 6.1.123-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:f2fs_test_and_set_bit fs/f2fs/f2fs.h:2927 [inline]
RIP: 0010:update_sit_entry+0x67f/0x10d0 fs/f2fs/segment.c:2227
Code: 24 30 48 8d 5c 08 20 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 3e 44 04 fe 4c 8b 33 4d 01 ee 4c 89 f3 48 c1 eb 03 <42> 0f b6 04 3b 84 c0 4d 89 fd 0f 85 8a 08 00 00 41 0f b6 2e 41 89
RSP: 0018:ffffc90004086bd0 EFLAGS: 00010246
RAX: 1ffff1100fa8d87c RBX: 0000000000000000 RCX: 00000000000003c0
RDX: ffff88802583bb80 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 000000000000007c R08: ffffffff83ddea38 R09: ffffffff83dde58a
R10: 0000000000000003 R11: ffff88802583bb80 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020002000 CR3: 000000005a63e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 f2fs_allocate_data_block+0x149a/0x3310 fs/f2fs/segment.c:3275
 do_write_page+0x172/0x6e0 fs/f2fs/segment.c:3363
 f2fs_outplace_write_data+0x172/0x340 fs/f2fs/segment.c:3429
 f2fs_do_write_data_page+0x157f/0x27b0 fs/f2fs/data.c:2732
 f2fs_write_single_data_page+0xaee/0x1f90 fs/f2fs/data.c:2824
 f2fs_write_cache_pages fs/f2fs/data.c:3143 [inline]
 __f2fs_write_data_pages fs/f2fs/data.c:3299 [inline]
 f2fs_write_data_pages+0x1ceb/0x3a70 fs/f2fs/data.c:3326
 do_writepages+0x3a2/0x670 mm/page-writeback.c:2491
 filemap_fdatawrite_wbc+0x121/0x180 mm/filemap.c:388
 __filemap_fdatawrite_range mm/filemap.c:421 [inline]
 __filemap_fdatawrite mm/filemap.c:427 [inline]
 filemap_fdatawrite+0x13f/0x1b0 mm/filemap.c:432
 f2fs_sync_dirty_inodes+0x335/0x8a0 fs/f2fs/checkpoint.c:1115
 block_operations fs/f2fs/checkpoint.c:1253 [inline]
 f2fs_write_checkpoint+0xbfa/0x1e00 fs/f2fs/checkpoint.c:1658
 __write_checkpoint_sync fs/f2fs/checkpoint.c:1775 [inline]
 __checkpoint_and_complete_reqs+0xd6/0x3b0 fs/f2fs/checkpoint.c:1794
 issue_checkpoint_thread+0xd6/0x260 fs/f2fs/checkpoint.c:1825
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:f2fs_test_and_set_bit fs/f2fs/f2fs.h:2927 [inline]
RIP: 0010:update_sit_entry+0x67f/0x10d0 fs/f2fs/segment.c:2227
Code: 24 30 48 8d 5c 08 20 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 3e 44 04 fe 4c 8b 33 4d 01 ee 4c 89 f3 48 c1 eb 03 <42> 0f b6 04 3b 84 c0 4d 89 fd 0f 85 8a 08 00 00 41 0f b6 2e 41 89
RSP: 0018:ffffc90004086bd0 EFLAGS: 00010246
RAX: 1ffff1100fa8d87c RBX: 0000000000000000 RCX: 00000000000003c0
RDX: ffff88802583bb80 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 000000000000007c R08: ffffffff83ddea38 R09: ffffffff83dde58a
R10: 0000000000000003 R11: ffff88802583bb80 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3187d5e000 CR3: 000000005d963000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	24 30                	and    $0x30,%al
   2:	48 8d 5c 08 20       	lea    0x20(%rax,%rcx,1),%rbx
   7:	48 89 d8             	mov    %rbx,%rax
   a:	48 c1 e8 03          	shr    $0x3,%rax
   e:	42 80 3c 38 00       	cmpb   $0x0,(%rax,%r15,1)
  13:	74 08                	je     0x1d
  15:	48 89 df             	mov    %rbx,%rdi
  18:	e8 3e 44 04 fe       	call   0xfe04445b
  1d:	4c 8b 33             	mov    (%rbx),%r14
  20:	4d 01 ee             	add    %r13,%r14
  23:	4c 89 f3             	mov    %r14,%rbx
  26:	48 c1 eb 03          	shr    $0x3,%rbx
* 2a:	42 0f b6 04 3b       	movzbl (%rbx,%r15,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	4d 89 fd             	mov    %r15,%r13
  34:	0f 85 8a 08 00 00    	jne    0x8c4
  3a:	41 0f b6 2e          	movzbl (%r14),%ebp
  3e:	41                   	rex.B
  3f:	89                   	.byte 0x89