Unable to handle kernel paging request at virtual address dfff800000000013
KASAN: null-ptr-deref in range [0x0000000000000098-0x000000000000009f]
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
[dfff800000000013] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 UID: 0 PID: 6494 Comm: kworker/u8:2 Not tainted 6.12.0-syzkaller-g7b1d1d4cfac0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: btree_node_rewrite async_btree_node_rewrite_work
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : btree_path_lock_root fs/bcachefs/btree_iter.c:732 [inline]
pc : bch2_btree_path_traverse_one+0x738/0x2b30 fs/bcachefs/btree_iter.c:1183
lr : btree_path_lock_root fs/bcachefs/btree_iter.c:728 [inline]
lr : bch2_btree_path_traverse_one+0x714/0x2b30 fs/bcachefs/btree_iter.c:1183
sp : ffff8000a23c5840
x29: ffff8000a23c5b20 x28: ffff0000f2b814d8 x27: ffff0000d4638378
x26: 000000000000110b x25: 1fffe0001e57029b x24: 0000000000000000
x23: ffff8000a23c59a0 x22: dfff800000000000 x21: ffff0000f2b80000
x20: 0000000000000098 x19: 0000000000000000 x18: ffff8000a23c5d60
x17: 534f502058414d5f x16: ffff80008b47f808 x15: 0000000000000005
x14: 0000000000000000 x13: 0000000000000003 x12: ffff0000ee778000
x11: ffff8000a23c59c0 x10: 0000000000ff0100 x9 : 0000000000000000
x8 : 0000000000000013 x7 : 0000000000000000 x6 : 0000000100000000
x5 : ffff0000d4638378 x4 : 0000000000000000 x3 : ffff8000828047f4
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 btree_path_lock_root fs/bcachefs/btree_iter.c:732 [inline] (P)
 bch2_btree_path_traverse_one+0x738/0x2b30 fs/bcachefs/btree_iter.c:1183 (P)
 btree_path_lock_root fs/bcachefs/btree_iter.c:728 [inline] (L)
 bch2_btree_path_traverse_one+0x714/0x2b30 fs/bcachefs/btree_iter.c:1183 (L)
 bch2_btree_path_traverse fs/bcachefs/btree_iter.h:247 [inline]
 __bch2_btree_iter_peek fs/bcachefs/btree_iter.c:2210 [inline]
 bch2_btree_iter_peek_upto+0xafc/0x54f8 fs/bcachefs/btree_iter.c:2310
 bch2_btree_iter_peek_upto_type fs/bcachefs/btree_iter.h:685 [inline]
 bch2_bucket_alloc_freelist fs/bcachefs/alloc_foreground.c:495 [inline]
 bch2_bucket_alloc_trans+0x8b4/0x25e4 fs/bcachefs/alloc_foreground.c:648
 bch2_bucket_alloc_set_trans+0x4ac/0xa10 fs/bcachefs/alloc_foreground.c:808
 __open_bucket_add_buckets+0x1168/0x1a68 fs/bcachefs/alloc_foreground.c:1057
 open_bucket_add_buckets+0x2d8/0x3b4 fs/bcachefs/alloc_foreground.c:1101
 bch2_alloc_sectors_start_trans+0xa84/0x199c
 __bch2_btree_node_alloc fs/bcachefs/btree_update_interior.c:339 [inline]
 bch2_btree_reserve_get+0x500/0xf70 fs/bcachefs/btree_update_interior.c:549
 bch2_btree_update_start+0xe14/0x15ac fs/bcachefs/btree_update_interior.c:1247
 bch2_btree_node_rewrite+0x17c/0xd74 fs/bcachefs/btree_update_interior.c:2148
 async_btree_node_rewrite_trans fs/bcachefs/btree_update_interior.c:2236 [inline]
 async_btree_node_rewrite_work+0x28c/0x124c fs/bcachefs/btree_update_interior.c:2249
 process_one_work+0x7bc/0x1600 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x97c/0xeec kernel/workqueue.c:3391
 kthread+0x288/0x310 kernel/kthread.c:389
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862
Code: 9788dadc f9400398 91026314 d343fe88 (38f66908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	9788dadc 	bl	0xfffffffffe236b70
   4:	f9400398 	ldr	x24, [x28]
   8:	91026314 	add	x20, x24, #0x98
   c:	d343fe88 	lsr	x8, x20, #3
* 10:	38f66908 	ldrsb	w8, [x8, x22] <-- trapping instruction