F2FS-fs (loop4): invalid crc value
F2FS-fs (loop4): Found nat_bits in checkpoint
F2FS-fs (loop4): Start checkpoint disabled!
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 4feb5067 P4D 4feb5067 PUD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 8017 Comm: syz.4.1013 Not tainted 5.15.184-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:0x0
Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
RSP: 0018:ffffc9000349f598 EFLAGS: 00010282
RAX: 1ffffffff142dbb3 RBX: ffffea00013322c0 RCX: ffffffff8a16dd98
RDX: ffffc9000e834000 RSI: 000000000007ffff RDI: ffffea00013322c0
RBP: ffffc9000349f790 R08: dffffc0000000000 R09: fffff94000266459
R10: fffff94000266459 R11: 1ffffd4000266458 R12: ffff888024d6c000
R13: dffffc0000000000 R14: ffff888023ce0000 R15: ffff888024d6c000
FS:  00007f7c258466c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000022c2b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 f2fs_update_meta_page+0x45/0x60 fs/f2fs/segment.c:2470
 do_checkpoint+0x1b35/0x4010 fs/f2fs/checkpoint.c:1544
 f2fs_write_checkpoint+0x12e6/0x1a80 fs/f2fs/checkpoint.c:1700
 f2fs_disable_checkpoint+0x3c2/0x4f0 fs/f2fs/super.c:2160
 f2fs_fill_super+0x60ce/0x6f00 fs/f2fs/super.c:4388
 mount_bdev+0x287/0x3c0 fs/super.c:1400
 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
 vfs_get_tree+0x88/0x270 fs/super.c:1530
 do_new_mount+0x24a/0xa40 fs/namespace.c:3014
 do_mount fs/namespace.c:3357 [inline]
 __do_sys_mount fs/namespace.c:3565 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3542
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f7c279e010a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007f7c25845e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f7c25845ef0 RCX: 00007f7c279e010a
RDX: 0000200000000140 RSI: 0000200000000000 RDI: 00007f7c25845eb0
RBP: 0000200000000140 R08: 00007f7c25845ef0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000000
R13: 00007f7c25845eb0 R14: 0000000000005505 R15: 0000200000000380
 </TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace 4ff6cd809fca9c2b ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
RSP: 0018:ffffc9000349f598 EFLAGS: 00010282
RAX: 1ffffffff142dbb3 RBX: ffffea00013322c0 RCX: ffffffff8a16dd98
RDX: ffffc9000e834000 RSI: 000000000007ffff RDI: ffffea00013322c0
RBP: ffffc9000349f790 R08: dffffc0000000000 R09: fffff94000266459
R10: fffff94000266459 R11: 1ffffd4000266458 R12: ffff888024d6c000
R13: dffffc0000000000 R14: ffff888023ce0000 R15: ffff888024d6c000
FS:  00007f7c258466c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000022c2b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400