find_entry called with index = 0
jfs_dirty_inode called on read-only volume
Is remount racy?
jfs_dirty_inode called on read-only volume
Is remount racy?
Unable to handle kernel paging request at virtual address dfff8000000000c7
KASAN: null-ptr-deref in range [0x0000000000000638-0x000000000000063f]
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
[dfff8000000000c7] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1]  SMP
Modules linked in:
CPU: 0 UID: 0 PID: 7436 Comm: syz.0.142 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
pstate: 03400005 (nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : JFS_SBI fs/jfs/jfs_incore.h:217 [inline]
pc : txEnd+0xbc/0x4f0 fs/jfs/jfs_txnmgr.c:507
lr : txEnd+0x98/0x4f0 fs/jfs/jfs_txnmgr.c:505
sp : ffff8000a0087940
x29: ffff8000a0087940 x28: ffff700014010f3c x27: ffff80008fbb6000
x26: 1ffff00011f76d34 x25: dfff800000000000 x24: ffff80008fbb6000
x23: ffff0000f4b13850 x22: 0000000000000110 x21: ffff80009b403000
x20: 0000000000000000 x19: 0000000000000638 x18: 00000000ffffffff
x17: ffff800093325000 x16: ffff80008052bd88 x15: 0000000000000001
x14: 1ffff00013680606 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000080000 x10: 0000000000000002 x9 : dfff800000000000
x8 : 00000000000000c7 x7 : ffff800080503da8 x6 : 0000000000000000
x5 : 0000000000000020 x4 : ffff8000a0087670 x3 : 0000000000000010
x2 : 0000000000000006 x1 : ffff80008eb9af9c x0 : 0000000000000000
Call trace:
 JFS_SBI fs/jfs/jfs_incore.h:217 [inline] (P)
 txEnd+0xbc/0x4f0 fs/jfs/jfs_txnmgr.c:507 (P)
 jfs_mkdir+0x258/0x8b4 fs/jfs/namei.c:293
 vfs_mkdir+0x284/0x424 fs/namei.c:4453
 do_mkdirat+0x1f8/0x4c8 fs/namei.c:4486
 __do_sys_mkdirat fs/namei.c:4503 [inline]
 __se_sys_mkdirat fs/namei.c:4501 [inline]
 __arm64_sys_mkdirat+0x8c/0xa4 fs/namei.c:4501
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:724
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
Code: 97c0da12 f9400268 9118e113 d343fe68 (38796908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	97c0da12 	bl	0xffffffffff036848
   4:	f9400268 	ldr	x8, [x19]
   8:	9118e113 	add	x19, x8, #0x638
   c:	d343fe68 	lsr	x8, x19, #3
* 10:	38796908 	ldrb	w8, [x8, x25] <-- trapping instruction