option from the mount to silence this warning.
=======================================================
F2FS-fs (loop2): Try to recover all the superblocks, ret: 0
==================================================================
BUG: KASAN: null-ptr-deref in f2fs_issue_flush+0x104/0x798 fs/f2fs/segment.c:-1
Write of size 4 at addr 000000000000005c by task syz.2.17/3705

CPU: 1 PID: 3705 Comm: syz.2.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
Call trace:
 dump_backtrace+0x100/0x150 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x18/0x24 arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x28/0x38 lib/dump_stack.c:88
 dump_stack_lvl+0x68/0x94 lib/dump_stack.c:106
 print_report+0x40/0x68 mm/kasan/report.c:423
 kasan_report+0xa8/0xfc mm/kasan/report.c:524
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x260/0x2a0 mm/kasan/generic.c:189
 __kasan_check_write+0x2c/0x3c mm/kasan/shadow.c:37
 f2fs_issue_flush+0x104/0x798 fs/f2fs/segment.c:-1
 f2fs_do_sync_file+0xafc/0x10b4 fs/f2fs/file.c:378
 f2fs_ioc_commit_atomic_write fs/f2fs/file.c:2260 [inline]
 __f2fs_ioctl+0x2cdc/0x8a84 fs/f2fs/file.c:4366
 f2fs_ioctl+0x110/0x174 fs/f2fs/file.c:4454
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __arm64_sys_ioctl+0x108/0x14c fs/ioctl.c:856
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x78/0x25c arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x15c/0x1d8 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x50/0x108 arch/arm64/kernel/syscall.c:204
 el0_svc+0x34/0xd4 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
==================================================================
Unable to handle kernel NULL pointer dereference at virtual address 000000000000005c
Mem abort info:
  ESR = 0x0000000096000006
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x06: level 2 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000006
  CM = 0, WnR = 0
user pgtable: 4k pages, 48-bit VAs, pgdp=00000001094f3000
[000000000000005c] pgd=0800000114a2e003, p4d=0800000114a2e003, pud=0800000117a6e003, pmd=0000000000000000
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 3705 Comm: syz.2.17 Tainted: G    B              syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
pstate: 42400005 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : __lse_atomic_add arch/arm64/include/asm/atomic_lse.h:27 [inline]
pc : arch_atomic_add arch/arm64/include/asm/atomic.h:28 [inline]
pc : arch_atomic_inc include/linux/atomic/atomic-arch-fallback.h:424 [inline]
pc : atomic_inc include/linux/atomic/atomic-instrumented.h:191 [inline]
pc : f2fs_issue_flush+0x114/0x798 fs/f2fs/segment.c:578
lr : f2fs_issue_flush+0x104/0x798 fs/f2fs/segment.c:-1
sp : ffff800018f774c0
x29: ffff800018f775c0 x28: 0000000000000000 x27: dfff800000000000
x26: ffff0000da4b1fa0 x25: ffff7000031eee9c x24: ffff7000031eeed0
x23: ffff800018f77500 x22: 000000000000000a x21: ffff0000d3d74000
x20: 000000000000005c x19: 00000000180022de x18: 0000000000000000
x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000005
x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000001
x11: 1ffff00002135944 x10: 0000000000000000 x9 : 0000000000000000
x8 : 0000000000000001 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff800018f76e98 x4 : ffff80000f059d20 x3 : ffff80000811ce74
x2 : 0000000000000001 x1 : 0000000000000008 x0 : 0000000000000000
Call trace:
 arch_atomic_add arch/arm64/include/asm/alternative-macros.h:-1 [inline]
 arch_atomic_inc include/linux/atomic/atomic-arch-fallback.h:424 [inline]
 atomic_inc include/linux/atomic/atomic-instrumented.h:191 [inline]
 f2fs_issue_flush+0x114/0x798 fs/f2fs/segment.c:578
 f2fs_do_sync_file+0xafc/0x10b4 fs/f2fs/file.c:378
 f2fs_ioc_commit_atomic_write fs/f2fs/file.c:2260 [inline]
 __f2fs_ioctl+0x2cdc/0x8a84 fs/f2fs/file.c:4366
 f2fs_ioctl+0x110/0x174 fs/f2fs/file.c:4454
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __arm64_sys_ioctl+0x108/0x14c fs/ioctl.c:856
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x78/0x25c arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x15c/0x1d8 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x50/0x108 arch/arm64/kernel/syscall.c:204
 el0_svc+0x34/0xd4 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Code: 375006f3 f9000ffc d503201f 52800028 (b828029f) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	375006f3 	tbnz	w19, #10, 0xdc
   4:	f9000ffc 	str	x28, [sp, #24]
   8:	d503201f 	nop
   c:	52800028 	mov	w8, #0x1                   	// #1
* 10:	b828029f 	stadd	w8, [x20] <-- trapping instruction