BTRFS info (device loop0 state CS): scrub: started on devid 1
Unable to handle kernel paging request at virtual address dfff800000000041
KASAN: null-ptr-deref in range [0x0000000000000208-0x000000000000020f]
Mem abort info:
  ESR = 0x0000000096000005
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x05: level 1 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000
  CM = 0, WnR = 0, TnD = 0, TagAccess = 0
  GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[dfff800000000041] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 UID: 0 PID: 7281 Comm: syz.0.112 Not tainted 6.12.0-syzkaller-g7b1d1d4cfac0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : btrfs_lookup_csums_bitmap+0xa4/0x12d8 fs/btrfs/file-item.c:615
lr : btrfs_lookup_csums_bitmap+0x98/0x12d8 fs/btrfs/file-item.c:614
sp : ffff8000a3a86e40
x29: ffff8000a3a86fa0 x28: 0000000000500000 x27: ffff0000e30e00b2
x26: dfff800000000000 x25: ffff0000e30e0090 x24: ffff0000e30e01f0
x23: ffff700014750de4 x22: 000000000050ffff x21: ffff8000a3a87180
x20: ffff8000a3a86f40 x19: 0000000000000208 x18: ffff0000e30f2010
x17: 0000000000033df1 x16: ffff80008b47f65c x15: 0000000000000001
x14: 1fffe0001c61c02d x13: 0000000000000000 x12: ffff800082323ca0
x11: 0000000000080000 x10: 00000000000240b8 x9 : ffff8000a477e000
x8 : 0000000000000041 x7 : 00000000003000a8 x6 : 000000000050d000
x5 : ffff8000a3a87180 x4 : ffff0000cab7b800 x3 : 000000000050ffff
x2 : 0000000000500000 x1 : ffff0000e30f2080 x0 : 0000000000000000
Call trace:
 btrfs_lookup_csums_bitmap+0xa4/0x12d8 fs/btrfs/file-item.c:615 (P)
 btrfs_lookup_csums_bitmap+0x98/0x12d8 fs/btrfs/file-item.c:614 (L)
 scrub_find_fill_first_stripe+0x7ac/0xab8 fs/btrfs/scrub.c:1618
 queue_scrub_stripe fs/btrfs/scrub.c:1912 [inline]
 scrub_simple_mirror+0x440/0x7e4 fs/btrfs/scrub.c:2144
 scrub_stripe+0x7e4/0x2174 fs/btrfs/scrub.c:2310
 scrub_chunk+0x268/0x41c fs/btrfs/scrub.c:2442
 scrub_enumerate_chunks+0x99c/0x12c4 fs/btrfs/scrub.c:2706
 btrfs_scrub_dev+0x5a8/0xb2c fs/btrfs/scrub.c:3028
 btrfs_ioctl_scrub+0x1f4/0x3e8 fs/btrfs/ioctl.c:3251
 btrfs_ioctl+0x684/0xaec fs/btrfs/ioctl.c:4777
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl fs/ioctl.c:893 [inline]
 __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:893
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
Code: 9789885f f90013f3 91082273 d343fe68 (387a6908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	9789885f 	bl	0xfffffffffe26217c
   4:	f90013f3 	str	x19, [sp, #32]
   8:	91082273 	add	x19, x19, #0x208
   c:	d343fe68 	lsr	x8, x19, #3
* 10:	387a6908 	ldrb	w8, [x8, x26] <-- trapping instruction