netlink: 13 bytes leftover after parsing attributes in process `syz-executor7'.
BUG: unable to handle kernel paging request at 0000000051774afd
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: 1595 Comm: udevd Not tainted 4.15.0-rc2-next-20171204+ #58
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: 000000006e4445d7 task.stack: 0000000085f86232
RIP: 0010:lock_release+0x195/0xda0 kernel/locking/lockdep.c:4021
RSP: 0018:ffff8801d03ff278 EFLAGS: 00010046
RAX: 0000000000000007 RBX: 1ffff1003a07fe54 RCX: ffffffff8170ee2d
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8801d03f0ac4
RBP: ffff8801d03ff3e8 R08: 0000000000000000 R09: 0000000000000002
R10: 0000000000000000 R11: ffffffff8748dd60 R12: ffff8801d03f0240
R13: ffff8801d03ff3c0 R14: ffffffff85f44c40 R15: ffff8801d03f0240
FS:  00007f0878edf7a0(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffff8 CR3: 00000001d030f000 CR4: 00000000001426e0
Call Trace:
 rcu_lock_release include/linux/rcupdate.h:249 [inline]
 rcu_read_unlock include/linux/rcupdate.h:686 [inline]
 __is_insn_slot_addr+0x225/0x330 kernel/kprobes.c:301
 is_kprobe_optinsn_slot include/linux/kprobes.h:344 [inline]
 kernel_text_address+0x11b/0x140 kernel/extable.c:150
 __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_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551
 __do_kmalloc_node mm/slab.c:3676 [inline]
 __kmalloc_node_track_caller+0x47/0x70 mm/slab.c:3690
 __kmalloc_reserve.isra.41+0x41/0xd0 net/core/skbuff.c:137
 __alloc_skb+0x13b/0x780 net/core/skbuff.c:205
 alloc_skb include/linux/skbuff.h:983 [inline]
 netlink_alloc_large_skb net/netlink/af_netlink.c:1144 [inline]
 netlink_sendmsg+0xa86/0xe70 net/netlink/af_netlink.c:1836
 sock_sendmsg_nosec net/socket.c:636 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:646
 ___sys_sendmsg+0x75b/0x8a0 net/socket.c:2026
 __sys_sendmsg+0xe5/0x210 net/socket.c:2060
 SYSC_sendmsg net/socket.c:2071 [inline]
 SyS_sendmsg+0x2d/0x50 net/socket.c:2067
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x7f08785f3320
RSP: 002b:00007ffeb426dcc8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000013f94e0 RCX: 00007f08785f3320
RDX: 0000000000000000 RSI: 00007ffeb426dd10 RDI: 0000000000000004
RBP: 0000000000000000 R08: 00007f0878edf7a0 R09: 0000000000000000
R10: 1999999999999999 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000013f94e0 R14: 0000000000000006 R15: 0000000000000ae8
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> 1f 44 00 00 65 8b 05 4f d5 aa 7e 89 c0 48 0f a3 05 95 6b 08 
RIP: lock_release+0x195/0xda0 kernel/locking/lockdep.c:4021 RSP: ffff8801d03ff278
CR2: fffffffffffffff8
---[ end trace 650ab34c6d9d7f85 ]---