BUG: unable to handle page fault for address: ffffffffffffffdc
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD eb99067 P4D eb99067 PUD eb9b067 PMD 0 
Oops: Oops: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 5916 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:strlen+0x30/0xa0 lib/string.c:402
Code: 00 00 00 00 00 fc ff df 55 48 89 fa 48 89 fd 53 48 c1 ea 03 48 83 ec 08 0f b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 50 <80> 7d 00 00 74 3d 48 bb 00 00 00 00 00 fc ff df 48 89 e8 48 83 c0
RSP: 0000:ffffc90003107920 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffffffffffffdc RCX: 0000000000000000
RDX: 0000000000000004 RSI: ffffffff82081bc1 RDI: ffffffffffffffdc
RBP: ffffffffffffffdc R08: 0000000000000004 R09: 00000000000000a9
R10: 00000000000006c0 R11: 0000000000000001 R12: ffff8880133a4740
R13: 0000000000000007 R14: 00000000fffffff3 R15: ffffffffffffffdc
FS:  0000000000000000(0000) GS:ffff888096a67000(0063) knlGS:0000000057e74480
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: ffffffffffffffdc CR3: 0000000029dc3000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 __fortify_strlen include/linux/fortify-string.h:218 [inline]
 audit_log_untrustedstring+0x19/0x30 kernel/audit.c:2203
 integrity_audit_message+0x366/0x4f0 security/integrity/integrity_audit.c:60
 integrity_audit_msg+0x41/0x60 security/integrity/integrity_audit.c:32
 validate_hash_algo security/integrity/ima/ima_appraise.c:752 [inline]
 ima_inode_setxattr+0x512/0x5f0 security/integrity/ima/ima_appraise.c:775
 security_inode_setxattr+0x299/0x560 security/security.c:1940
 __vfs_setxattr_locked+0xad/0x2b0 fs/xattr.c:309
 vfs_setxattr+0x14a/0x390 fs/xattr.c:344
 do_setxattr+0x145/0x180 fs/xattr.c:662
 file_setxattr fs/xattr.c:672 [inline]
 file_setxattr+0x139/0x1b0 fs/xattr.c:666
 path_setxattrat+0x335/0x3b0 fs/xattr.c:732
 __do_sys_fsetxattr fs/xattr.c:782 [inline]
 __se_sys_fsetxattr fs/xattr.c:779 [inline]
 __ia32_sys_fsetxattr+0xc4/0x140 fs/xattr.c:779
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline]
 __do_fast_syscall_32+0x13a/0x8b0 arch/x86/entry/syscall_32.c:291
 do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:316
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf708efec
Code: Unable to access opcode bytes at 0xf708efc2.
RSP: 002b:00000000ff8537bc EFLAGS: 00000296 ORIG_RAX: 00000000000000e4
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000080000080
RDX: 0000000080000380 RSI: 0000000000000002 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
CR2: ffffffffffffffdc
---[ end trace 0000000000000000 ]---
RIP: 0010:strlen+0x30/0xa0 lib/string.c:402
Code: 00 00 00 00 00 fc ff df 55 48 89 fa 48 89 fd 53 48 c1 ea 03 48 83 ec 08 0f b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 50 <80> 7d 00 00 74 3d 48 bb 00 00 00 00 00 fc ff df 48 89 e8 48 83 c0
RSP: 0000:ffffc90003107920 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffffffffffffdc RCX: 0000000000000000
RDX: 0000000000000004 RSI: ffffffff82081bc1 RDI: ffffffffffffffdc
RBP: ffffffffffffffdc R08: 0000000000000004 R09: 00000000000000a9
R10: 00000000000006c0 R11: 0000000000000001 R12: ffff8880133a4740
R13: 0000000000000007 R14: 00000000fffffff3 R15: ffffffffffffffdc
FS:  0000000000000000(0000) GS:ffff888096a67000(0063) knlGS:0000000057e74480
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f708f000 CR3: 0000000029dc3000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	00 00                	add    %al,(%rax)
   4:	00 fc                	add    %bh,%ah
   6:	ff                   	lcall  (bad)
   7:	df 55 48             	fists  0x48(%rbp)
   a:	89 fa                	mov    %edi,%edx
   c:	48 89 fd             	mov    %rdi,%rbp
   f:	53                   	push   %rbx
  10:	48 c1 ea 03          	shr    $0x3,%rdx
  14:	48 83 ec 08          	sub    $0x8,%rsp
  18:	0f b6 04 02          	movzbl (%rdx,%rax,1),%eax
  1c:	48 89 fa             	mov    %rdi,%rdx
  1f:	83 e2 07             	and    $0x7,%edx
  22:	38 d0                	cmp    %dl,%al
  24:	7f 04                	jg     0x2a
  26:	84 c0                	test   %al,%al
  28:	75 50                	jne    0x7a
* 2a:	80 7d 00 00          	cmpb   $0x0,0x0(%rbp) <-- trapping instruction
  2e:	74 3d                	je     0x6d
  30:	48 bb 00 00 00 00 00 	movabs $0xdffffc0000000000,%rbx
  37:	fc ff df
  3a:	48 89 e8             	mov    %rbp,%rax
  3d:	48                   	rex.W
  3e:	83                   	.byte 0x83
  3f:	c0                   	.byte 0xc0