------------[ cut here ]------------
WARNING: CPU: 1 PID: 88455 at arch/x86/kernel/traps.c:943 exc_debug_kernel arch/x86/kernel/traps.c:943 [inline]
WARNING: CPU: 1 PID: 88455 at arch/x86/kernel/traps.c:943 exc_debug+0xfc/0x140 arch/x86/kernel/traps.c:1025
Modules linked in:
CPU: 1 PID: 88455 Comm: syz-executor.4 Not tainted 5.10.183 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:exc_debug_kernel arch/x86/kernel/traps.c:943 [inline]
RIP: 0010:exc_debug+0xfc/0x140 arch/x86/kernel/traps.c:1025
Code: 10 5b 5d 41 5c e9 a4 ec 3c 00 31 c0 0f 23 f8 e9 6c ff ff ff 48 89 e6 48 89 ef e8 0f 2e 23 fd 84 c0 75 b7 f6 44 24 01 40 74 b0 <0f> 0b 48 81 a5 90 00 00 00 ff fe ff ff eb a1 80 e6 bf 48 89 14 24
RSP: 0018:fffffe000005df28 EFLAGS: 00010002
RAX: 0000000000000000 RBX: 00000000000b0202 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffff888004328944
RBP: fffffe000005df58 R08: 0000000000000000 R09: 0000000000010000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f2604abb700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000087 CR3: 0000000004256000 CR4: 0000000000350ee0
DR0: 0000000020000080 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <#DB>
 asm_exc_debug+0x19/0x30 arch/x86/include/asm/idtentry.h:604
RIP: 0010:do_strncpy_from_user lib/strncpy_from_user.c:41 [inline]
RIP: 0010:strncpy_from_user+0x25b/0x470 lib/strncpy_from_user.c:139
Code: 83 ed 08 bf 07 00 00 00 48 83 c3 08 48 89 ee e8 ab 2c 44 ff 48 83 fd 07 0f 86 d0 01 00 00 e8 2c 33 44 ff 45 31 ff 4d 8b 34 1c <31> ff 44 89 fe e8 6b 2c 44 ff 45 85 ff 0f 84 52 ff ff ff e8 0d 33
RSP: 0018:ffff888020bdfd18 EFLAGS: 00040246
RAX: 00000000000000aa RBX: 0000000000000000 RCX: ffffc900007eb000
RDX: 0000000000040000 RSI: ffffffff81fc34e4 RDI: 0000000000000007
RBP: 0000000000000fe0 R08: 0000000000000fe0 R09: 0000000000001000
R10: 0000000000000007 R11: 0000000000000001 R12: 0000000020000080
R13: ffff888059df4420 R14: 65732f636f72702f R15: 0000000000000000
 </#DB>
 getname_flags.part.0+0x95/0x4f0 fs/namei.c:149
 getname_flags include/linux/audit.h:320 [inline]
 getname+0x8e/0xd0 fs/namei.c:209
 do_sys_openat2+0xf9/0x420 fs/open.c:1180
 do_sys_open fs/open.c:1202 [inline]
 __do_sys_openat fs/open.c:1218 [inline]
 __se_sys_openat fs/open.c:1213 [inline]
 __x64_sys_openat+0x13f/0x1f0 fs/open.c:1213
 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xc6
RIP: 0033:0x7f2607545b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2604abb188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f2607658f60 RCX: 00007f2607545b19
RDX: 0000000000000000 RSI: 0000000020000080 RDI: ffffffffffffff9c
RBP: 00007f260759ff6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc0b79f97f R14: 00007f2604abb300 R15: 0000000000022000
irq event stamp: 92
hardirqs last  enabled at (91): [<ffffffff83e51ec8>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
hardirqs last  enabled at (91): [<ffffffff83e51ec8>] _raw_spin_unlock_irqrestore+0x38/0x40 kernel/locking/spinlock.c:191
hardirqs last disabled at (92): [<ffffffff83e3521a>] exc_debug_kernel arch/x86/kernel/traps.c:890 [inline]
hardirqs last disabled at (92): [<ffffffff83e3521a>] exc_debug+0x5a/0x140 arch/x86/kernel/traps.c:1025
softirqs last  enabled at (56): [<ffffffff84001002>] asm_call_irq_on_stack+0x12/0x20
softirqs last disabled at (51): [<ffffffff84001002>] asm_call_irq_on_stack+0x12/0x20
---[ end trace a96d3ffa6f581e83 ]---
tmpfs: Bad value for 'mpol'
tmpfs: Bad value for 'mpol'
----------------
Code disassembly (best guess):
   0:	83 ed 08             	sub    $0x8,%ebp
   3:	bf 07 00 00 00       	mov    $0x7,%edi
   8:	48 83 c3 08          	add    $0x8,%rbx
   c:	48 89 ee             	mov    %rbp,%rsi
   f:	e8 ab 2c 44 ff       	callq  0xff442cbf
  14:	48 83 fd 07          	cmp    $0x7,%rbp
  18:	0f 86 d0 01 00 00    	jbe    0x1ee
  1e:	e8 2c 33 44 ff       	callq  0xff44334f
  23:	45 31 ff             	xor    %r15d,%r15d
  26:	4d 8b 34 1c          	mov    (%r12,%rbx,1),%r14
* 2a:	31 ff                	xor    %edi,%edi <-- trapping instruction
  2c:	44 89 fe             	mov    %r15d,%esi
  2f:	e8 6b 2c 44 ff       	callq  0xff442c9f
  34:	45 85 ff             	test   %r15d,%r15d
  37:	0f 84 52 ff ff ff    	je     0xffffff8f
  3d:	e8                   	.byte 0xe8
  3e:	0d                   	.byte 0xd
  3f:	33                   	.byte 0x33