F2FS-fs (loop4): Start checkpoint disabled!
F2FS-fs (loop4): Mounted with checkpoint version = 48b305e6
Unable to handle kernel paging request at virtual address dfff800000000004
KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027]
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
[dfff800000000004] address between user and kernel address ranges
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 6633 Comm: syz.4.537 Not tainted 6.1.148-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : f2fs_test_and_set_bit fs/f2fs/f2fs.h:2933 [inline]
pc : update_sit_entry+0x4d4/0xd20 fs/f2fs/segment.c:2227
lr : f2fs_block_unit_discard fs/f2fs/f2fs.h:4547 [inline]
lr : update_sit_entry+0x3b8/0xd20 fs/f2fs/segment.c:2226
sp : ffff8000219e7100
x29: ffff8000219e7130 x28: 0000000000000020 x27: dfff800000000000
x26: 0000000000000009 x25: 0000000000000000 x24: 0000000000000022
x23: ffff0000cb9801b0 x22: 0000000000000000 x21: ffff0000d3eec168
x20: ffff0000d3eec000 x19: 0000000000000001 x18: ffff800011aabce0
x17: ffff8000181e7000 x16: ffff8000082d2370 x15: 0000000000000002
x14: 00000000ffffffff x13: 0000000000ff0100 x12: 0000000000ff0100
x11: ff0080000a3063b8 x10: 0000000000000002 x9 : 0000000000000022
x8 : 0000000000000004 x7 : ffff80000a305d14 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 f2fs_test_and_set_bit fs/f2fs/f2fs.h:2933 [inline]
 update_sit_entry+0x4d4/0xd20 fs/f2fs/segment.c:2227
 f2fs_allocate_data_block+0xcc4/0x2e50 fs/f2fs/segment.c:3275
 __allocate_data_block+0x404/0x89c fs/f2fs/data.c:1424
 f2fs_map_blocks+0xa88/0x2b24 fs/f2fs/data.c:1593
 expand_inode_data+0x3f8/0x6cc fs/f2fs/file.c:1805
 f2fs_fallocate+0x340/0x8bc fs/f2fs/file.c:1908
 vfs_fallocate+0x4a4/0x5f4 fs/open.c:323
 ioctl_preallocate+0x204/0x2a0 fs/ioctl.c:290
 file_ioctl fs/ioctl.c:-1 [inline]
 do_vfs_ioctl+0x17f4/0x206c fs/ioctl.c:849
 __do_sys_ioctl fs/ioctl.c:868 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:856
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 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: f9400308 f85f83a9 8b090118 d343ff08 (38fb6908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	f9400308 	ldr	x8, [x24]
   4:	f85f83a9 	ldur	x9, [x29, #-8]
   8:	8b090118 	add	x24, x8, x9
   c:	d343ff08 	lsr	x8, x24, #3
* 10:	38fb6908 	ldrsb	w8, [x8, x27] <-- trapping instruction