Unable to handle kernel paging request at virtual address dfff800000000003
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
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
[dfff800000000003] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 UID: 0 PID: 6415 Comm: syz-executor Not tainted 6.11.0-rc7-syzkaller-g5f5673607153 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : backup_super_roots fs/btrfs/disk-io.c:1691 [inline]
pc : write_all_supers+0x9a0/0x38d0 fs/btrfs/disk-io.c:4041
lr : lowmem_page_address include/linux/mm.h:2262 [inline]
lr : folio_address include/linux/mm.h:2273 [inline]
lr : btrfs_header_level fs/btrfs/accessors.h:688 [inline]
lr : backup_super_roots fs/btrfs/disk-io.c:1689 [inline]
lr : write_all_supers+0x8e0/0x38d0 fs/btrfs/disk-io.c:4041
sp : ffff8000a3477460
x29: ffff8000a3477800 x28: ffff0000d654eb2b x27: dfff800000000000
x26: 0000000000000003 x25: ffff0000d654ebc5 x24: ffff0000d9af06a8
x23: 0000000000000000 x22: 0000000000000009 x21: dfff800000000000
x20: dfff800000000000 x19: 0000000000000018 x18: 1fffe000366d31ee
x17: ffff80008f56d000 x16: ffff80008029c560 x15: 0000000000000001
x14: 1fffe0001b35e00d x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000000001 x10: 1fffe0001a3724b4 x9 : 0000000000000000
x8 : 0000000000000000 x7 : ffff80008223e800 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff800080361120
x2 : 0000000000000001 x1 : 0000000000000000 x0 : ffff0000d1b926c0
Call trace:
 backup_super_roots fs/btrfs/disk-io.c:1691 [inline]
 write_all_supers+0x9a0/0x38d0 fs/btrfs/disk-io.c:4041
 btrfs_commit_transaction+0x1af0/0x2ba4 fs/btrfs/transaction.c:2530
 btrfs_sync_fs+0x530/0xad4 fs/btrfs/super.c:1033
 sync_filesystem+0x1a0/0x218 fs/sync.c:66
 generic_shutdown_super+0x70/0x2b8 fs/super.c:621
 kill_anon_super+0x4c/0x7c fs/super.c:1237
 btrfs_kill_super+0x40/0x58 fs/btrfs/super.c:2121
 deactivate_locked_super+0xc4/0x12c fs/super.c:473
 deactivate_super+0xe0/0x100 fs/super.c:506
 cleanup_mnt+0x34c/0x3dc fs/namespace.c:1373
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1380
 task_work_run+0x230/0x2e0 kernel/task_work.c:228
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 do_notify_resume+0x178/0x1f4 arch/arm64/kernel/entry-common.c:151
 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline]
 el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:713
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598
Code: d2d00014 f2fbfff4 91006113 d343fe7a (38756b48) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	d2d00014 	mov	x20, #0x800000000000        	// #140737488355328
   4:	f2fbfff4 	movk	x20, #0xdfff, lsl #48
   8:	91006113 	add	x19, x8, #0x18
   c:	d343fe7a 	lsr	x26, x19, #3
* 10:	38756b48 	ldrb	w8, [x26, x21] <-- trapping instruction