Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
Mem abort info:
  ESR = 0x0000000086000005
  EC = 0x21: IABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x05: level 1 translation fault
user pgtable: 4k pages, 48-bit VAs, pgdp=000000012ccc2000
[0000000000000000] pgd=080000012c3ff003, p4d=080000012c3ff003, pud=0000000000000000
Internal error: Oops: 0000000086000005 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4719 Comm: syz-executor Not tainted 5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : 0x0
lr : set_page_dirty+0x23c/0x4f0 mm/page-writeback.c:2631
sp : ffff80001f727250
x29: ffff80001f727250 x28: dfff800000000000 x27: 0000000000000001
x26: 0000000000000000 x25: 1fffff8000788589 x24: dfff800000000000
x23: 0000000000000000 x22: 05ffc00000000007 x21: ffff0000e2258a58
x20: ffff8000113b3d18 x19: fffffc0003c42c40 x18: 0000000000000000
x17: ffff800016cf0000 x16: ffff8000111a97c4 x15: 0000000000000000
x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000869e728
x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff0000f10b2000 x4 : ffff0000cf727000 x3 : ffff0000f10b1f80
x2 : fffffffffffffff0 x1 : 0000000000000000 x0 : fffffc0003c42c40
Call trace:
 0x0
 f2fs_update_meta_page+0xa0/0x1e0 fs/f2fs/segment.c:2470
 do_checkpoint+0x1448/0x321c fs/f2fs/checkpoint.c:1539
 f2fs_write_checkpoint+0x1088/0x1c84 fs/f2fs/checkpoint.c:1700
 f2fs_issue_checkpoint+0x25c/0x354 fs/f2fs/checkpoint.c:-1
 f2fs_sync_fs+0x1c0/0x490 fs/f2fs/super.c:1691
 sync_filesystem+0x1a0/0x218 fs/sync.c:66
 generic_shutdown_super+0x70/0x2f0 fs/super.c:448
 kill_block_super+0x70/0xdc fs/super.c:1427
 kill_f2fs_super+0x264/0x334 fs/f2fs/super.c:4551
 deactivate_locked_super+0xb8/0x13c fs/super.c:335
 deactivate_super+0xf8/0x118 fs/super.c:366
 cleanup_mnt+0x3a4/0x458 fs/namespace.c:1139
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1146
 task_work_run+0x12c/0x1e0 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 do_notify_resume+0x24b4/0x3128 arch/arm64/kernel/signal.c:949
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
 el0_svc+0xf0/0x1e0 arch/arm64/kernel/entry-common.c:609
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: bad PC value
---[ end trace 566771a3fb14e89e ]---