netlink: 5 bytes leftover after parsing attributes in process `syz-executor5'.
netlink: 'syz-executor5': attribute type 1 has an invalid length.
INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
CPU: 1 PID: 4057 Comm: syz-executor4 Not tainted 4.15.0-rc3-next-20171214+ #67
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xe9/0x14b lib/dump_stack.c:53
 register_lock_class+0x164/0x5d0 kernel/locking/lockdep.c:752
 __lock_acquire+0xb4/0x1430 kernel/locking/lockdep.c:3314
 lock_acquire+0xbf/0x220 kernel/locking/lockdep.c:3914
 __raw_write_lock include/linux/rwlock_api_smp.h:210 [inline]
 _raw_write_lock+0x2a/0x40 kernel/locking/spinlock.c:288
 neigh_flush_dev+0x1b1/0x330 net/core/neighbour.c:253
 neigh_ifdown+0x41/0x140 net/core/neighbour.c:293
 arp_ifdown+0x1c/0x1f net/ipv4/arp.c:1271
 fib_disable_ip+0x48/0x70 net/ipv4/fib_frontend.c:1173
 fib_inetaddr_event+0xca/0xd0 net/ipv4/fib_frontend.c:1198
 notifier_call_chain+0x41/0xc0 kernel/notifier.c:93
 __blocking_notifier_call_chain kernel/notifier.c:317 [inline]
 blocking_notifier_call_chain+0x4f/0x70 kernel/notifier.c:328
 __inet_del_ifa+0x1cf/0x370 net/ipv4/devinet.c:409
 inet_del_ifa net/ipv4/devinet.c:439 [inline]
 inetdev_destroy net/ipv4/devinet.c:304 [inline]
 inetdev_event+0x308/0x5c0 net/ipv4/devinet.c:1529
 notifier_call_chain+0x41/0xc0 kernel/notifier.c:93
 __raw_notifier_call_chain kernel/notifier.c:394 [inline]
 raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401
 call_netdevice_notifiers_info+0x32/0x60 net/core/dev.c:1679
 call_netdevice_notifiers net/core/dev.c:1697 [inline]
 dev_set_mtu+0x12c/0x220 net/core/dev.c:6966
 dev_ifsioc+0x3a8/0x520 net/core/dev_ioctl.c:264
 dev_ioctl+0x15d/0x7a0 net/core/dev_ioctl.c:566
 sock_do_ioctl+0x59/0x60 net/socket.c:971
 sock_ioctl+0x211/0x320 net/socket.c:1061
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0xaf/0x840 fs/ioctl.c:686
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x452a09
RSP: 002b:00007feaeb04cc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452a09
RDX: 0000000020dc4000 RSI: 0000000000008922 RDI: 0000000000000014
RBP: 000000000000035f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f2188
R13: 00000000ffffffff R14: 00007feaeb04d6d4 R15: 0000000000000000
BUG: unable to handle kernel NULL pointer dereference at 0000000000000028
IP: neigh_cleanup_and_release+0x13/0x70 net/core/neighbour.c:100
PGD 1faef1067 P4D 1faef1067 PUD 1f8602067 PMD 0 
Oops: 0000 [#1] SMP
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 4057 Comm: syz-executor4 Not tainted 4.15.0-rc3-next-20171214+ #67
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:neigh_cleanup_and_release+0x13/0x70 net/core/neighbour.c:100
RSP: 0018:ffffc900011739e8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8801fadb5800 RCX: ffffffff820e511f
RDX: 0000000000010000 RSI: ffffc90003678000 RDI: ffff8801fadb5800
RBP: ffffc900011739f8 R08: 0000000000000000 R09: ffffffff820e5421
R10: ffffc90001173978 R11: 0000000000000000 R12: ffff8801f74777a0
R13: ffff8801fc820000 R14: ffff8801fc820000 R15: ffffffff83172f60
FS:  00007feaeb04d700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000028 CR3: 00000001faef0002 CR4: 00000000001606e0
Call Trace:
 neigh_flush_dev+0x270/0x330 net/core/neighbour.c:277
 neigh_ifdown+0x41/0x140 net/core/neighbour.c:293
 arp_ifdown+0x1c/0x1f net/ipv4/arp.c:1271
 fib_disable_ip+0x48/0x70 net/ipv4/fib_frontend.c:1173
 fib_inetaddr_event+0xca/0xd0 net/ipv4/fib_frontend.c:1198
 notifier_call_chain+0x41/0xc0 kernel/notifier.c:93
 __blocking_notifier_call_chain kernel/notifier.c:317 [inline]
 blocking_notifier_call_chain+0x4f/0x70 kernel/notifier.c:328
 __inet_del_ifa+0x1cf/0x370 net/ipv4/devinet.c:409
 inet_del_ifa net/ipv4/devinet.c:439 [inline]
 inetdev_destroy net/ipv4/devinet.c:304 [inline]
 inetdev_event+0x308/0x5c0 net/ipv4/devinet.c:1529
 notifier_call_chain+0x41/0xc0 kernel/notifier.c:93
 __raw_notifier_call_chain kernel/notifier.c:394 [inline]
 raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401
 call_netdevice_notifiers_info+0x32/0x60 net/core/dev.c:1679
 call_netdevice_notifiers net/core/dev.c:1697 [inline]
 dev_set_mtu+0x12c/0x220 net/core/dev.c:6966
 dev_ifsioc+0x3a8/0x520 net/core/dev_ioctl.c:264
 dev_ioctl+0x15d/0x7a0 net/core/dev_ioctl.c:566
 sock_do_ioctl+0x59/0x60 net/socket.c:971
 sock_ioctl+0x211/0x320 net/socket.c:1061
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0xaf/0x840 fs/ioctl.c:686
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x452a09
RSP: 002b:00007feaeb04cc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452a09
RDX: 0000000020dc4000 RSI: 0000000000008922 RDI: 0000000000000014
RBP: 000000000000035f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f2188
R13: 00000000ffffffff R14: 00007feaeb04d6d4 R15: 0000000000000000
Code: 1e 00 00 00 e8 af f4 ff ff 5b 5d c3 66 90 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 54 53 48 89 fb e8 21 52 1d ff 48 8b 43 10 <4c> 8b 60 28 4d 85 e4 74 0b e8 0f 52 1d ff 48 89 df 41 ff d4 e8 
RIP: neigh_cleanup_and_release+0x13/0x70 net/core/neighbour.c:100 RSP: ffffc900011739e8
CR2: 0000000000000028
---[ end trace 5b35ea25fb76b636 ]---