Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
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, ISS2 = 0x00000000
  CM = 0, WnR = 0, TnD = 0, TagAccess = 0
  GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
user pgtable: 4k pages, 52-bit VAs, pgdp=0000000046793880
[0000000000000000] pgd=080000005939d003, p4d=08000000800de003, pud=080000006442d003, pmd=0000000000000000
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 UID: 0 PID: 19167 Comm: syz.0.4746 Tainted: G    B              6.11.0-syzkaller-08836-gf8eb5bd9a818 #0
Tainted: [B]=BAD_PAGE
Hardware name: linux,dummy-virt (DT)
pstate: 61400009 (nZCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)
pc : __pi_strlen+0x14/0x150 arch/arm64/lib/strlen.S:87
lr : audit_log_untrustedstring+0x20/0x40 kernel/audit.c:2135
sp : ffff800083c7bc00
x29: ffff800083c7bc00 x28: f9f0000009160000 x27: 0000000000000000
x26: 0000000000000000 x25: 0000000000000000 x24: fbf000001f245680
x23: 00000000fffffff3 x22: 0000000000000000 x21: ffff80008051ba78
x20: f3f0000003042d80 x19: 0000000000000000 x18: ffffffffffffffff
x17: ffff800080027db0 x16: ffff8000804f3350 x15: ffff800083c7b9e0
x14: 0000000000000000 x13: fcf0000025eb181f x12: ffff800080027eb8
x11: ffff800080011558 x10: 000000000000005f x9 : 00000000000000a0
x8 : 0101010101010101 x7 : 00000000000006c0 x6 : 0000000000000059
x5 : fcf0000025eb1859 x4 : 0000000000000000 x3 : 0000000000000061
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 __pi_strlen+0x14/0x150 arch/arm64/lib/strlen.S:86
 smack_log_callback+0x7c/0xc8 security/smack/smack_access.c:321
 common_lsm_audit+0x5c/0x85c security/lsm_audit.c:456
 smack_log+0xec/0x140 security/smack/smack_access.c:383
 smk_access+0x104/0x148 security/smack/smack_access.c:199
 smack_watch_key+0xe0/0xf8 security/smack/smack_lsm.c:4656
 security_watch_key+0x58/0x148 security/security.c:4448
 keyctl_watch_key+0xb0/0x1cc security/keys/keyctl.c:1813
 __do_sys_keyctl security/keys/keyctl.c:2021 [inline]
 __se_sys_keyctl security/keys/keyctl.c:1874 [inline]
 __arm64_sys_keyctl+0x50/0x290 security/keys/keyctl.c:1874
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x48/0x110 arch/arm64/kernel/syscall.c:49
 el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:151
 el0_svc+0x34/0xec arch/arm64/kernel/entry-common.c:712
 el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:598
Code: 92400c04 b200c3e8 f100009f 5400088c (a9400c02) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	92400c04 	and	x4, x0, #0xf
   4:	b200c3e8 	mov	x8, #0x101010101010101     	// #72340172838076673
   8:	f100009f 	cmp	x4, #0x0
   c:	5400088c 	b.gt	0x11c
* 10:	a9400c02 	ldp	x2, x3, [x0] <-- trapping instruction