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: 0 PID: 4021 Comm: syz-executor236 Not tainted 5.15.179-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : dtInsertEntry+0x9cc/0x1178 fs/jfs/jfs_dtree.c:4026
lr : dtInsertEntry+0x9c0/0x1178 fs/jfs/jfs_dtree.c:4026
sp : ffff80001fe96dc0
x29: ffff80001fe96f20 x28: 0000000000000008 x27: 1fffe0001bbef628
x26: ffff0000ddf7b130 x25: ffff0000ddf7b140 x24: 0000000000000001
x23: 0000000000000000 x22: dfff800000000000 x21: ffff80001f4ca180
x20: ffff80001fe96ec0 x19: 0000000000000008 x18: 0000000000000000
x17: 0000000000000000 x16: ffff80000998953c x15: 0000000000008000
x14: ffff0000c96ed1c0 x13: 0000000000ff0100 x12: 0000000000000001
x11: 0000000000000000 x10: 0000000000000000 x9 : ffff0000c96ed1c0
x8 : 0000000000000001 x7 : ffff800009988a5c x6 : 0000000000000000
x5 : 0000000000000000 x4 : ffff80001fe97400 x3 : ffff800009972734
x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 dtInsertEntry+0x9cc/0x1178 fs/jfs/jfs_dtree.c:4026
 dtInsert+0x958/0x5534 fs/jfs/jfs_dtree.c:891
 jfs_create+0x698/0xa1c fs/jfs/namei.c:137
 lookup_open fs/namei.c:3462 [inline]
 open_last_lookups fs/namei.c:3532 [inline]
 path_openat+0xf18/0x26cc fs/namei.c:3739
 do_filp_open+0x1a8/0x3b4 fs/namei.c:3769
 do_sys_openat2+0x128/0x3e0 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+0x1f0/0x240 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+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: 97ad8647 f94017e8 91002113 d343fe68 (38f66908) 
---[ end trace bf4adc0d80fbaa69 ]---
----------------
Code disassembly (best guess):
   0:	97ad8647 	bl	0xfffffffffeb6191c
   4:	f94017e8 	ldr	x8, [sp, #40]
   8:	91002113 	add	x19, x8, #0x8
   c:	d343fe68 	lsr	x8, x19, #3
* 10:	38f66908 	ldrsb	w8, [x8, x22] <-- trapping instruction