netlink: 2 bytes leftover after parsing attributes in process `syz-executor7'.
BUG: unable to handle kernel paging request at 0000000039175b38
IP: lock_release+0x195/0xda0 kernel/locking/lockdep.c:4021
PGD 5e28067 P4D 5e28067 PUD 5e2a067 PMD 0 
Oops: 0002 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 1704 Comm: udevd Not tainted 4.15.0-rc1-next-20171201+ #57
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: 0000000089f20f4c task.stack: 000000005554b2ed
RIP: 0010:lock_release+0x195/0xda0 kernel/locking/lockdep.c:4021
RSP: 0018:ffff8801cb817688 EFLAGS: 00010046
RAX: 0000000000000007 RBX: 1ffff10039702ed6 RCX: ffffffff817d079c
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8801cb80a944
RBP: ffff8801cb8177f8 R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000000 R11: ffffffff8748cd60 R12: ffff8801cb80a0c0
R13: ffff8801cb8177d0 R14: ffffffff85f44c40 R15: ffff8801cb80a0c0
FS:  00007f504af857a0(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffff8 CR3: 00000001cc3de000 CR4: 00000000001426e0
DR0: 0000000000000065 DR1: 0000000000000fff DR2: fffffffffffffffe
DR3: 0000000000000fff DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 rcu_lock_release include/linux/rcupdate.h:249 [inline]
 rcu_read_unlock include/linux/rcupdate.h:686 [inline]
 is_bpf_text_address+0xa4/0x120 kernel/bpf/core.c:466
 kernel_text_address+0x102/0x140 kernel/extable.c:152
 __kernel_text_address+0xd/0x40 kernel/extable.c:107
 unwind_get_return_address+0x61/0xa0 arch/x86/kernel/unwind_frame.c:18
 __save_stack_trace+0x7e/0xd0 arch/x86/kernel/stacktrace.c:45
 save_stack_trace+0x1a/0x20 arch/x86/kernel/stacktrace.c:60
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0x71/0xc0 mm/kasan/kasan.c:524
 __cache_free mm/slab.c:3492 [inline]
 kmem_cache_free+0x77/0x280 mm/slab.c:3750
 putname+0xee/0x130 fs/namei.c:258
 filename_lookup+0x315/0x500 fs/namei.c:2342
 user_path_at_empty+0x40/0x50 fs/namei.c:2587
 user_path_at include/linux/namei.h:57 [inline]
 vfs_statx+0xe9/0x190 fs/stat.c:185
 vfs_lstat include/linux/fs.h:3085 [inline]
 SYSC_newlstat+0x87/0xf0 fs/stat.c:350
 SyS_newlstat+0x1d/0x30 fs/stat.c:344
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x7f504a68bd05
RSP: 002b:00007ffdedf12318 EFLAGS: 00000246 ORIG_RAX: 0000000000000006
RAX: ffffffffffffffda RBX: 0000000000b9f090 RCX: 00007f504a68bd05
RDX: 00007ffdedf12340 RSI: 00007ffdedf12340 RDI: 00007ffdedf12d00
RBP: 0000000000000000 R08: 0000000000b9e8f5 R09: 00007f504a6e1ff0
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000420298 R14: 00007ffdedf0f112 R15: 000000000000000b
Code: 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 c4 08 00 00 41 c7 87 84 08 00 00 01 00 00 00 <cc> 3f 05 00 00 65 8b 05 3f d7 aa 7e 89 c0 48 0f a3 05 c5 6c 08 
RIP: lock_release+0x195/0xda0 kernel/locking/lockdep.c:4021 RSP: ffff8801cb817688
CR2: fffffffffffffff8
---[ end trace 29b9505ef8586eb9 ]---