loop5: detected capacity change from 0 to 32768
Unable to handle kernel paging request at virtual address ffff00001a06e183
Mem abort info:
  ESR = 0x0000000096000021
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x21: alignment fault
Data abort info:
  ISV = 0, ISS = 0x00000021
  CM = 0, WnR = 0
swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000001c54db000
[ffff00001a06e183] pgd=180000023fff8003, p4d=180000023fff8003, pud=180000023fff7003, pmd=180000023ff26003, pte=006800005a06e707
Internal error: Oops: 0000000096000021 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 13014 Comm: syz-executor.5 Not tainted 6.1.0-rc2-syzkaller-154433-g247f34f7b803 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __lse__cmpxchg_case_mb_64 arch/arm64/include/asm/atomic_lse.h:287 [inline]
pc : __cmpxchg_case_mb_64 arch/arm64/include/asm/cmpxchg.h:130 [inline]
pc : __cmpxchg_mb arch/arm64/include/asm/cmpxchg.h:175 [inline]
pc : osq_lock+0x110/0x1f8 kernel/locking/osq_lock.c:162
lr : osq_lock+0x38/0x1f8 kernel/locking/osq_lock.c:94
sp : ffff800014113850
x29: ffff800014113850 x28: ffff80000eec9000 x27: ffff80000cbb6d47
x26: 0000000000000000 x25: 0000000000000000 x24: ffff000102731090
x23: ffff80000879e1b8 x22: ffff80000d2e2c40 x21: ffff00001a06e183
x20: ffff0001fefefc40 x19: ffff000102731070 x18: 0000000000000000
x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000
x14: 0000000000000002 x13: 0000000000000003 x12: 0000000000040000
x11: 0000000000000000 x10: ffff0001fefefc50 x9 : 000000000000000a
x8 : ffff0001fefefc40 x7 : 7f7f7f7f7f7f7f7f x6 : ffff80000879e1b8
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000000 x1 : ffff0001fefefc40 x0 : ffff00001a06e183
Call trace:
 __lse__cmpxchg_case_mb_64 arch/arm64/include/asm/atomic_lse.h:287 [inline]
 __cmpxchg_case_mb_64 arch/arm64/include/asm/cmpxchg.h:130 [inline]
 __cmpxchg_mb arch/arm64/include/asm/cmpxchg.h:175 [inline]
 osq_lock+0x110/0x1f8 kernel/locking/osq_lock.c:162
 mutex_optimistic_spin+0x1dc/0x254 kernel/locking/mutex.c:460
 __mutex_lock_common+0x1b4/0xca8 kernel/locking/mutex.c:607
 __mutex_lock kernel/locking/mutex.c:747 [inline]
 mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
 reiserfs_write_lock+0x3c/0x64 fs/reiserfs/lock.c:27
 reiserfs_lookup+0xa4/0x1c4 fs/reiserfs/namei.c:364
 lookup_open fs/namei.c:3391 [inline]
 open_last_lookups fs/namei.c:3481 [inline]
 path_openat+0x738/0x11c4 fs/namei.c:3710
 do_filp_open+0xdc/0x1b8 fs/namei.c:3740
 do_sys_openat2+0xb8/0x22c fs/open.c:1310
 do_sys_open fs/open.c:1326 [inline]
 __do_sys_openat fs/open.c:1342 [inline]
 __se_sys_openat fs/open.c:1337 [inline]
 __arm64_sys_openat+0xb0/0xe0 fs/open.c:1337
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall arch/arm64/kernel/syscall.c:52 [inline]
 el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206
 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581
Code: aa1503e0 aa1403e1 aa1f03e2 aa0103e8 (c8e8fea2) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	aa1503e0 	mov	x0, x21
   4:	aa1403e1 	mov	x1, x20
   8:	aa1f03e2 	mov	x2, xzr
   c:	aa0103e8 	mov	x8, x1
* 10:	c8e8fea2 	casal	x8, x2, [x21] <-- trapping instruction