bn = 0, index = 0
bn = 72c, index = 96
bn = 0, index = 0
bn = 0, index = 0
Unable to handle kernel paging request at virtual address dfff800000000037
KASAN: null-ptr-deref in range [0x00000000000001b8-0x00000000000001bf]
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
[dfff800000000037] address between user and kernel address ranges
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 4443 Comm: syz.1.6 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : folio_write_one+0x290/0x5c0 mm/page-writeback.c:2543
lr : __lse_atomic_add arch/arm64/include/asm/atomic_lse.h:27 [inline]
lr : arch_atomic_add arch/arm64/include/asm/atomic.h:28 [inline]
lr : arch_atomic_inc include/linux/atomic/atomic-arch-fallback.h:424 [inline]
lr : atomic_inc include/linux/atomic/atomic-instrumented.h:191 [inline]
lr : page_ref_inc include/linux/page_ref.h:158 [inline]
lr : folio_ref_inc include/linux/page_ref.h:165 [inline]
lr : folio_get include/linux/mm.h:1147 [inline]
lr : folio_write_one+0x280/0x5c0 mm/page-writeback.c:2542
sp : ffff8000216b75c0
x29: ffff8000216b76d0 x28: 1fffff800064bda0 x27: 1fffff800064bda1
x26: dfff800000000000 x25: ffff7000042d6ebc x24: 00000000000001b8
x23: fffffc000325ed34 x22: ffff8000216b7600 x21: fffffc000325ed08
x20: 0000000000000000 x19: fffffc000325ed00 x18: ffff800011b7bf60
x17: 0000000000000000 x16: ffff8000082d9364 x15: 0000000000000002
x14: 0000000000000001 x13: 1fffff800064bda6 x12: 0000000000080000
x11: 0000000000061b34 x10: ffff800022c0c000 x9 : ffff800008706e08
x8 : 0000000000000037 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff8000216b7660 x4 : 0000000000000008 x3 : ffff800008706dfc
x2 : 0000000000000001 x1 : 0000000000000004 x0 : 0000000000000001
Call trace:
 folio_write_one+0x290/0x5c0 mm/page-writeback.c:2543
 write_one_page include/linux/pagemap.h:1106 [inline]
 release_metapage+0x554/0xc6c fs/jfs/jfs_metapage.c:749
 dtSearch+0x169c/0x1b18 fs/jfs/jfs_dtree.c:793
 jfs_symlink+0x64c/0xdb0 fs/jfs/namei.c:1016
 vfs_symlink+0x238/0x3b0 fs/namei.c:4479
 do_symlinkat+0x178/0x35c fs/namei.c:4508
 __do_sys_symlinkat fs/namei.c:4525 [inline]
 __se_sys_symlinkat fs/namei.c:4522 [inline]
 __arm64_sys_symlinkat+0xa4/0xbc fs/namei.c:4522
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Code: 52800028 b82802ff 9106e318 d343ff08 (387a6908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	52800028 	mov	w8, #0x1                   	// #1
   4:	b82802ff 	stadd	w8, [x23]
   8:	9106e318 	add	x24, x24, #0x1b8
   c:	d343ff08 	lsr	x8, x24, #3
* 10:	387a6908 	ldrb	w8, [x8, x26] <-- trapping instruction