Unable to handle kernel paging request at virtual address dfff800000000005
KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f]
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
[dfff800000000005] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1]  SMP
Modules linked in:
CPU: 0 UID: 0 PID: 9400 Comm: syz.1.410 Not tainted 6.16.0-rc1-syzkaller-g39dfc971e42d #0 PREEMPT 
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 : bfs_move_block fs/bfs/file.c:43 [inline]
pc : bfs_move_blocks fs/bfs/file.c:57 [inline]
pc : bfs_get_block+0x498/0x9d4 fs/bfs/file.c:126
lr : __getblk include/linux/buffer_head.h:382 [inline]
lr : sb_getblk include/linux/buffer_head.h:388 [inline]
lr : bfs_move_block fs/bfs/file.c:42 [inline]
lr : bfs_move_blocks fs/bfs/file.c:57 [inline]
lr : bfs_get_block+0x470/0x9d4 fs/bfs/file.c:126
sp : ffff80009cc86690
x29: ffff80009cc86700 x28: ffff0000c6a1c160 x27: dfff800000000000
x26: 0000000000000028 x25: ffff0000f2560f68 x24: 0000000000000000
x23: ffff0000c6a1c018 x22: ffff0000f27ad828 x21: 1fffe00018d4382c
x20: 0000000000000200 x19: 000000000000000d x18: 00000000ffffffff
x17: ffff80009331f000 x16: ffff80008052d374 x15: 0000000000000001
x14: 1fffffbff87b3c8e x13: 0000000000000000 x12: 0000000000000000
x11: ffff7fbff87b3c8f x10: 0000000000ff0100 x9 : 0000000000000000
x8 : 0000000000000005 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff800080e3a194
x2 : 0000000000000001 x1 : 0000000000000040 x0 : 0000000000000000
Call trace:
 bfs_move_block fs/bfs/file.c:43 [inline] (P)
 bfs_move_blocks fs/bfs/file.c:57 [inline] (P)
 bfs_get_block+0x498/0x9d4 fs/bfs/file.c:126 (P)
 __block_write_begin_int+0x53c/0x15e8 fs/buffer.c:2151
 block_write_begin+0xa0/0x128 fs/buffer.c:2262
 bfs_write_begin+0x48/0xec fs/bfs/file.c:179
 generic_perform_write+0x23c/0x79c mm/filemap.c:4112
 __generic_file_write_iter+0xfc/0x204 mm/filemap.c:4229
 generic_file_write_iter+0x104/0x470 mm/filemap.c:4255
 __kernel_write_iter+0x2b8/0x6c8 fs/read_write.c:619
 __kernel_write+0xe0/0x130 fs/read_write.c:639
 __dump_emit fs/coredump.c:1034 [inline]
 dump_emit+0x220/0x31c fs/coredump.c:1072
 writenote+0x178/0x28c fs/binfmt_elf.c:1417
 write_note_info fs/binfmt_elf.c:1910 [inline]
 elf_core_dump+0x264c/0x2f40 fs/binfmt_elf.c:2062
 do_coredump+0x1fc0/0x2b54 fs/coredump.c:950
 get_signal+0xe38/0x12f8 kernel/signal.c:3019
 do_signal+0x1c0/0x4438 arch/arm64/kernel/signal.c:1615
 do_notify_resume+0xac/0x1ec arch/arm64/kernel/entry-common.c:148
 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_da+0xc0/0x160 arch/arm64/kernel/entry-common.c:628
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:789
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
Code: 97e6ef48 9100a31a f94012d4 d343ff48 (387b6908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	97e6ef48 	bl	0xffffffffff9bbd20
   4:	9100a31a 	add	x26, x24, #0x28
   8:	f94012d4 	ldr	x20, [x22, #32]
   c:	d343ff48 	lsr	x8, x26, #3
* 10:	387b6908 	ldrb	w8, [x8, x27] <-- trapping instruction