BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 255bd067 P4D 255bd067 PUD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 4513 Comm: syz-executor.0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:0x0
Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
RSP: 0018:ffffc9000323f6d8 EFLAGS: 00010282
RAX: 1ffffffff142d973 RBX: ffffea000196eb40 RCX: ffffffff8a16cb98
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea000196eb40
RBP: ffffc9000323f8d0 R08: dffffc0000000000 R09: fffff9400032dd69
R10: fffff9400032dd69 R11: 1ffffd400032dd68 R12: ffff88807bcafb10
R13: 0000000000000001 R14: ffff8880195c4000 R15: ffff8880195d0000
FS:  00005555926e3480(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000076cdc000 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+0x1aa9/0x4010 fs/f2fs/checkpoint.c:1539
 f2fs_write_checkpoint+0x12e6/0x1a80 fs/f2fs/checkpoint.c:1700
 f2fs_issue_checkpoint+0x2d8/0x440 fs/f2fs/checkpoint.c:1861
 sync_filesystem+0x1be/0x220 fs/sync.c:66
 generic_shutdown_super+0x6b/0x300 fs/super.c:448
 kill_block_super+0x7c/0xe0 fs/super.c:1427
 kill_f2fs_super+0x2ed/0x3a0 fs/f2fs/super.c:4565
 deactivate_locked_super+0x93/0xf0 fs/super.c:335
 cleanup_mnt+0x418/0x4d0 fs/namespace.c:1139
 task_work_run+0x125/0x1a0 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fe02bb67197
Code: b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007fff44de39c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fe02bbb13b9 RCX: 00007fe02bb67197
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007fff44de3a80
RBP: 00007fff44de3a80 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff44de4b40
R13: 00007fe02bbb13b9 R14: 0000000000022dbf R15: 0000000000000002
 </TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace fec0bee52c0c0971 ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
RSP: 0018:ffffc9000323f6d8 EFLAGS: 00010282
RAX: 1ffffffff142d973 RBX: ffffea000196eb40 RCX: ffffffff8a16cb98
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea000196eb40
RBP: ffffc9000323f8d0 R08: dffffc0000000000 R09: fffff9400032dd69
R10: fffff9400032dd69 R11: 1ffffd400032dd68 R12: ffff88807bcafb10
R13: 0000000000000001 R14: ffff8880195c4000 R15: ffff8880195d0000
FS:  00005555926e3480(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000076cdc000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400