kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 34 Comm: kworker/u4:2 Not tainted 4.14.302-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: writeback wb_workfn (flush-7:0)
task: ffff8880b565a1c0 task.stack: ffff8880b56b0000
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
RIP: 0010:f2fs_test_and_set_bit fs/f2fs/f2fs.h:1956 [inline]
RIP: 0010:update_sit_entry+0x684/0x1560 fs/f2fs/segment.c:1682
RSP: 0018:ffff8880b56b71b8 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff888091632dc0 RCX: 0000000000000054
RDX: 0000000000000000 RSI: 1ffff1101364edb4 RDI: ffff8880b0037230
RBP: ffff8880b0037210 R08: ffff88808fffcd80 R09: ffffed1014c49025
R10: ffff8880a6248129 R11: ffff8880b565a1c0 R12: 0000000000000000
R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f721000 CR3: 000000008fd60000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 refresh_sit_entry+0x2c/0x730 fs/f2fs/segment.c:1728
 allocate_data_block+0x47d/0xf60 fs/f2fs/segment.c:2372
 do_write_page+0x222/0x7f0 fs/f2fs/segment.c:2402
 write_data_page+0x15d/0x3a0 fs/f2fs/segment.c:2456
 do_write_data_page+0xc63/0x2ca0 fs/f2fs/data.c:1493
 __write_data_page+0xea2/0x1480 fs/f2fs/data.c:1586
 f2fs_write_cache_pages+0x40d/0xe50 fs/f2fs/data.c:1744
 __f2fs_write_data_pages+0x2e2/0xb90 fs/f2fs/data.c:1838
 do_writepages+0xc3/0x240 mm/page-writeback.c:2361
 __writeback_single_inode+0xda/0x1010 fs/fs-writeback.c:1382
 writeback_sb_inodes+0x48b/0xd30 fs/fs-writeback.c:1645
 wb_writeback+0x243/0xb80 fs/fs-writeback.c:1820
 wb_do_writeback fs/fs-writeback.c:1952 [inline]
 wb_workfn+0x2bd/0xf50 fs/fs-writeback.c:1988
 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117
 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406
Code: ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 6c 0e 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 75 20 4d 01 e6 4c 89 f2 48 c1 ea 03 <0f> b6 04 02 4c 89 f2 83 e2 07 38 d0 7f 08 84 c0 0f 85 57 0e 00 
RIP: f2fs_test_and_set_bit fs/f2fs/f2fs.h:1956 [inline] RSP: ffff8880b56b71b8
RIP: update_sit_entry+0x684/0x1560 fs/f2fs/segment.c:1682 RSP: ffff8880b56b71b8
---[ end trace eb0f2930a7e55ed4 ]---
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	df 48 89             	fisttps -0x77(%rax)
   3:	fa                   	cli
   4:	48 c1 ea 03          	shr    $0x3,%rdx
   8:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   c:	0f 85 6c 0e 00 00    	jne    0xe7e
  12:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  19:	fc ff df
  1c:	4c 8b 75 20          	mov    0x20(%rbp),%r14
  20:	4d 01 e6             	add    %r12,%r14
  23:	4c 89 f2             	mov    %r14,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	0f b6 04 02          	movzbl (%rdx,%rax,1),%eax <-- trapping instruction
  2e:	4c 89 f2             	mov    %r14,%rdx
  31:	83 e2 07             	and    $0x7,%edx
  34:	38 d0                	cmp    %dl,%al
  36:	7f 08                	jg     0x40
  38:	84 c0                	test   %al,%al
  3a:	0f                   	.byte 0xf
  3b:	85 57 0e             	test   %edx,0xe(%rdi)