syzbot

loop0: detected capacity change from 0 to 32768
find_entry called with index >= next_index
Unable to handle kernel paging request at virtual address dfff800000000001
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
[dfff800000000001] address between user and kernel address ranges
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4021 Comm: syz-executor236 Not tainted 5.15.185-syzkaller #0
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 : dtInsertEntry+0x8d0/0xf60 fs/jfs/jfs_dtree.c:4027
lr : dtInsertEntry+0x8c4/0xf60 fs/jfs/jfs_dtree.c:4027
sp : ffff80001f197120
x29: ffff80001f197200 x28: 0000000000000065 x27: ffff80001eb1a180
x26: dfff800000000000 x25: ffff0000cf1d8216 x24: ffff0000deb01eb0
x23: 000000000000000d x22: 0000000000000000 x21: 1fffe0001bd603d8
x20: ffff0000deb01ec0 x19: 0000000000000008 x18: 0000000000000000
x17: 0000000000000000 x16: ffff8000097d7fd8 x15: 0000000000008000
x14: 0000000000ff0100 x13: ffffffffffffffff x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000000 x9 : ffff8000097b48ac
x8 : 0000000000000001 x7 : ffff8000097d7584 x6 : 0000000000000000
x5 : 0000000000000000 x4 : ffff80001f197398 x3 : ffff8000097c1e4c
x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 dtInsertEntry+0x8d0/0xf60 fs/jfs/jfs_dtree.c:4027
 dtInsert+0x6c8/0x5634 fs/jfs/jfs_dtree.c:892
 jfs_create+0x588/0x8c4 fs/jfs/namei.c:137
 lookup_open fs/namei.c:3462 [inline]
 open_last_lookups fs/namei.c:3532 [inline]
 path_openat+0x1144/0x26e4 fs/namei.c:3739
 do_filp_open+0x164/0x330 fs/namei.c:3769
 do_sys_openat2+0x128/0x3d8 fs/open.c:1253
 do_sys_open fs/open.c:1269 [inline]
 __do_sys_openat fs/open.c:1285 [inline]
 __se_sys_openat fs/open.c:1280 [inline]
 __arm64_sys_openat+0x120/0x154 fs/open.c:1280
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: 97b3105d f94003e8 91002113 d343fe68 (38fa6908) 
---[ end trace 87326e01b56a2480 ]---
----------------
Code disassembly (best guess):
   0:	97b3105d 	bl	0xfffffffffecc4174
   4:	f94003e8 	ldr	x8, [sp]
   8:	91002113 	add	x19, x8, #0x8
   c:	d343fe68 	lsr	x8, x19, #3
* 10:	38fa6908 	ldrsb	w8, [x8, x26] <-- trapping instruction