syzbot

batman_adv: batadv0: The MTU of interface vlan28 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem.
batman_adv: batadv0: Not using interface vlan28 (retrying later): interface not active
INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
CPU: 1 PID: 6712 Comm: syz-executor.1 Not tainted 4.14.231-syzkaller #0
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+0x1b2/0x281 lib/dump_stack.c:58
 register_lock_class+0x32b/0x1320 kernel/locking/lockdep.c:768
 __lock_acquire+0x167/0x3f20 kernel/locking/lockdep.c:3378
 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998
 __mutex_lock_common kernel/locking/mutex.c:756 [inline]
 __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893
 rdev_lock_llsec_table net/ieee802154/rdev-ops.h:226 [inline]
 nl802154_dump_llsec_key+0x13e/0xb70 net/ieee802154/nl802154.c:1524
 genl_lock_dumpit+0x60/0x90 net/netlink/genetlink.c:481
 netlink_dump+0x39c/0xad0 net/netlink/af_netlink.c:2203
 __netlink_dump_start+0x4e2/0x740 net/netlink/af_netlink.c:2300
 genl_family_rcv_msg+0x95c/0xb20 net/netlink/genetlink.c:549
 genl_rcv_msg+0xaf/0x140 net/netlink/genetlink.c:625
 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2433
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:636
 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline]
 netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1313
 netlink_sendmsg+0x62e/0xb80 net/netlink/af_netlink.c:1878
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062
 __sys_sendmsg+0xa3/0x120 net/socket.c:2096
 SYSC_sendmsg net/socket.c:2107 [inline]
 SyS_sendmsg+0x27/0x40 net/socket.c:2103
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x466459
RSP: 002b:00007fab1bddc188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000466459
RDX: 00000000000cc000 RSI: 0000000020000140 RDI: 0000000000000004
RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffd144f9ebf R14: 00007fab1bddc300 R15: 0000000000022000
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 6712 Comm: syz-executor.1 Not tainted 4.14.231-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880a2ac8240 task.stack: ffff8882328d0000
RIP: 0010:ieee802154_llsec_send_key_id+0x71/0x650 net/ieee802154/nl802154.c:691
RSP: 0018:ffff8882328d7498 EFLAGS: 00010202
RAX: 0000000000000002 RBX: 0000000000000010 RCX: ffffc90011d64000
RDX: 0000000000040000 RSI: ffffffff86db06fa RDI: ffff888045e01540
RBP: 1ffff1104651ae97 R08: 0000000000000000 R09: ffff88808fb16664
R10: ffff88808fb1665b R11: ffff8880a2ac8240 R12: ffff888045e01540
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88808fb16654
FS:  00007fab1bddc700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb5700ee020 CR3: 0000000220da6000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 nl802154_send_key net/ieee802154/nl802154.c:1474 [inline]
 nl802154_dump_llsec_key+0x44a/0xb70 net/ieee802154/nl802154.c:1532
 genl_lock_dumpit+0x60/0x90 net/netlink/genetlink.c:481
 netlink_dump+0x39c/0xad0 net/netlink/af_netlink.c:2203
 __netlink_dump_start+0x4e2/0x740 net/netlink/af_netlink.c:2300
 genl_family_rcv_msg+0x95c/0xb20 net/netlink/genetlink.c:549
 genl_rcv_msg+0xaf/0x140 net/netlink/genetlink.c:625
 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2433
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:636
 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline]
 netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1313
 netlink_sendmsg+0x62e/0xb80 net/netlink/af_netlink.c:1878
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062
 __sys_sendmsg+0xa3/0x120 net/socket.c:2096
 SYSC_sendmsg net/socket.c:2107 [inline]
 SyS_sendmsg+0x27/0x40 net/socket.c:2103
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x466459
RSP: 002b:00007fab1bddc188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000466459
RDX: 00000000000cc000 RSI: 0000000020000140 RDI: 0000000000000004
RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffd144f9ebf R14: 00007fab1bddc300 R15: 0000000000022000
Code: 8d 44 2d 00 c7 00 f1 f1 f1 f1 c7 40 04 f1 f1 01 f2 c7 40 08 02 f2 04 f2 c7 40 0c 00 f3 f3 f3 e8 76 1e 7a fa 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 74 06 0f 8e 14 05 00 00 0f b6 03 4c 8d 74 
RIP: ieee802154_llsec_send_key_id+0x71/0x650 net/ieee802154/nl802154.c:691 RSP: ffff8882328d7498
---[ end trace 74e366d26489827b ]---