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
Unable to handle kernel paging request at virtual address 00000000ffffffff
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
  CM = 0, WnR = 0
user pgtable: 4k pages, 48-bit VAs, pgdp=000000010a7dc000
[00000000ffffffff] pgd=080000011aab6003, p4d=080000011aab6003, pud=0000000000000000
Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 4657 Comm: syz.1.77 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : scnprintf_cpu_key fs/reiserfs/prints.c:95 [inline]
pc : prepare_error_buf+0x7cc/0x1840 fs/reiserfs/prints.c:229
lr : prepare_error_buf+0x4e4/0x1840 fs/reiserfs/prints.c:230
sp : ffff800021217180
x29: ffff800021217300 x28: ffffffffffffffe2 x27: ffff80001c5b4b7e
x26: ffff700004242e40 x25: ffff80001c5b5a7e x24: 00000000ffffffff
x23: 000000000000004b x22: ffff80001c5b5a60 x21: ffff80001c5b5a7f
x20: ffff800021217360 x19: dfff800000000000 x18: 0000000000000000
x17: ffff80001835b000 x16: ffff8000082eeba4 x15: 0000000000000000
x14: 000000000000007a x13: 0000000000ff0100 x12: 0000000000ff0100
x11: ff00800008cbbd08 x10: 0000000000000000 x9 : ffff800008cbbd08
x8 : 0000000000000000 x7 : 20726f6620686372 x6 : 7261657320666f20
x5 : ffff80001c5b4b7e x4 : ffff80001c5b5a7e x3 : ffff80001193248c
x2 : 000000000000000f x1 : 00000000ffffffe0 x0 : 00000000ffffffff
Call trace:
 scnprintf_cpu_key fs/reiserfs/prints.c:95 [inline]
 prepare_error_buf+0x7cc/0x1840 fs/reiserfs/prints.c:229
 __reiserfs_error+0xdc/0x2a0 fs/reiserfs/prints.c:396
 reiserfs_do_truncate+0x268/0x1058 fs/reiserfs/stree.c:1930
 reiserfs_truncate_file+0x5d0/0xb00 fs/reiserfs/inode.c:2310
 reiserfs_truncate_failed_write fs/reiserfs/inode.c:2743 [inline]
 reiserfs_write_begin+0x544/0x714 fs/reiserfs/inode.c:2808
 generic_cont_expand_simple+0x130/0x208 fs/buffer.c:2347
 reiserfs_setattr+0x51c/0xfec fs/reiserfs/inode.c:3305
 notify_change+0xb0c/0xdcc fs/attr.c:499
 do_truncate+0x188/0x20c fs/open.c:65
 vfs_truncate+0x23c/0x2b0 fs/open.c:111
 do_sys_truncate+0xec/0x1b4 fs/open.c:134
 __do_sys_truncate fs/open.c:146 [inline]
 __se_sys_truncate fs/open.c:144 [inline]
 __arm64_sys_truncate+0x5c/0x70 fs/open.c:144
 __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: d343ff08 38f36908 35005bc8 aa1803e0 (b8404408) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	d343ff08 	lsr	x8, x24, #3
   4:	38f36908 	ldrsb	w8, [x8, x19]
   8:	35005bc8 	cbnz	w8, 0xb80
   c:	aa1803e0 	mov	x0, x24
* 10:	b8404408 	ldr	w8, [x0], #4 <-- trapping instruction