loop3: detected capacity change from 0 to 40427
F2FS-fs (loop3): invalid crc value
F2FS-fs (loop3): f2fs_recover_fsync_data: recovery fsync data, check_only: 0
F2FS-fs (loop3): Mounted with checkpoint version = 48b305e4
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 8000000127da2067 P4D 8000000127da2067 PUD 0 
Oops: Oops: 0000 [#1] SMP PTI
CPU: 0 UID: 0 PID: 3623 Comm: syz.3.17 Not tainted 6.16.0-rc3-syzkaller #0 PREEMPT(undef) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:strcmp+0xa/0x30 lib/string.c:284
Code: 48 8d 40 01 75 f5 e9 95 63 02 00 cc 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 31 c0 0f b6 0c 07 <0f> b6 14 06 38 d1 75 0f 48 ff c0 84 c9 75 ed 31 c0 c3 cc cc cc cc
RSP: 0018:ffffc9000296b860 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000066
RDX: ffff888108a89b90 RSI: 0000000000000000 RDI: ffff8881033f8e78
RBP: 0000000000000000 R08: 0000000000080000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff815c6320 R12: ffff888110328000
R13: ffff888110328000 R14: 0000000000000000 R15: ffffc9000296ba30
FS:  00007f6b9dccf6c0(0000) GS:ffff8882b3baa000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000105b36000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 f2fs_check_quota_consistency fs/f2fs/super.c:1221 [inline]
 f2fs_check_opt_consistency+0x615/0xa60 fs/f2fs/super.c:1469
 f2fs_remount+0x21e/0x8e0 fs/f2fs/super.c:2696
 reconfigure_super+0x1a8/0x220 fs/super.c:1077
 do_remount fs/namespace.c:3369 [inline]
 path_mount+0x514/0x570 fs/namespace.c:4201
 do_mount fs/namespace.c:4222 [inline]
 __do_sys_mount fs/namespace.c:4433 [inline]
 __se_sys_mount+0x147/0x1b0 fs/namespace.c:4410
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x8f/0x250 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6b9de5ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6b9dccf038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f6b9e085fa0 RCX: 00007f6b9de5ebe9
RDX: 0000000000000000 RSI: 0000200000000040 RDI: 0000000000000000
RBP: 00007f6b9dee1e19 R08: 0000200000000140 R09: 0000000000000000
R10: 0000000000000020 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6b9e086038 R14: 00007f6b9e085fa0 R15: 00007ffc2c0c41f8
 </TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace 0000000000000000 ]---
RIP: 0010:strcmp+0xa/0x30 lib/string.c:284
Code: 48 8d 40 01 75 f5 e9 95 63 02 00 cc 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 31 c0 0f b6 0c 07 <0f> b6 14 06 38 d1 75 0f 48 ff c0 84 c9 75 ed 31 c0 c3 cc cc cc cc
RSP: 0018:ffffc9000296b860 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000066
RDX: ffff888108a89b90 RSI: 0000000000000000 RDI: ffff8881033f8e78
RBP: 0000000000000000 R08: 0000000000080000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff815c6320 R12: ffff888110328000
R13: ffff888110328000 R14: 0000000000000000 R15: ffffc9000296ba30
FS:  00007f6b9dccf6c0(0000) GS:ffff8882b3baa000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000105b36000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	48 8d 40 01          	lea    0x1(%rax),%rax
   4:	75 f5                	jne    0xfffffffb
   6:	e9 95 63 02 00       	jmp    0x263a0
   b:	cc                   	int3
   c:	0f 1f 40 00          	nopl   0x0(%rax)
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	90                   	nop
  1c:	90                   	nop
  1d:	90                   	nop
  1e:	90                   	nop
  1f:	90                   	nop
  20:	f3 0f 1e fa          	endbr64
  24:	31 c0                	xor    %eax,%eax
  26:	0f b6 0c 07          	movzbl (%rdi,%rax,1),%ecx
* 2a:	0f b6 14 06          	movzbl (%rsi,%rax,1),%edx <-- trapping instruction
  2e:	38 d1                	cmp    %dl,%cl
  30:	75 0f                	jne    0x41
  32:	48 ff c0             	inc    %rax
  35:	84 c9                	test   %cl,%cl
  37:	75 ed                	jne    0x26
  39:	31 c0                	xor    %eax,%eax
  3b:	c3                   	ret
  3c:	cc                   	int3
  3d:	cc                   	int3
  3e:	cc                   	int3
  3f:	cc                   	int3