alloc_skb include/linux/skbuff.h:980 [inline]
 netlink_dump+0x21b/0xad0 net/netlink/af_netlink.c:2184
 __netlink_dump_start+0x4e2/0x740 net/netlink/af_netlink.c:2300
 genl_family_rcv_msg+0x95c/0xb20 net/netlink/genetlink.c:549
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: 25958 Comm: syz-executor.4 Not tainted 4.14.227-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88807c0d4680 task.stack: ffff88809ffd0000
RIP: 0010:nla_len include/net/netlink.h:706 [inline]
RIP: 0010:nla_parse_nested include/net/netlink.h:765 [inline]
RIP: 0010:nl802154_del_llsec_dev+0x13b/0x2e0 net/ieee802154/nl802154.c:1783
RSP: 0018:ffff88809ffd76e0 EFLAGS: 00010246
 genl_rcv_msg+0xaf/0x140 net/netlink/genetlink.c:625
 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2433
RAX: dffffc0000000000 RBX: ffff88823a051280 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff86d9ad75 RDI: ffff88823a051398
RBP: 1ffff11013ffaede R08: 0000000000000001 R09: ffff88809ffd7990
R10: ffff88809ffd76af R11: ffff88807c0d4680 R12: ffff8880aba3a040
R13: ffff8880abc14fd0 R14: ffffffff886f28a0 R15: ffff88807846f580
FS:  00007f55d0924700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000970004 CR3: 00000000940c2000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 genl_family_rcv_msg+0x572/0xb20 net/netlink/genetlink.c:600
 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
 genl_rcv_msg+0xaf/0x140 net/netlink/genetlink.c:625
 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2433
 netlink_sendmsg+0x62e/0xb80 net/netlink/af_netlink.c:1878
 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
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062
 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
 __sys_sendmsg+0xa3/0x120 net/socket.c:2096
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
 SYSC_sendmsg net/socket.c:2107 [inline]
 SyS_sendmsg+0x27/0x40 net/socket.c:2103
RIP: 0033:0x466459
RSP: 002b:00007fc451625188 EFLAGS: 00000246
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 ORIG_RAX: 000000000000002e
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000466459
RIP: 0033:0x466459
RDX: 0000000000000000 RSI: 00000000200006c0 RDI: 0000000000000003
RSP: 002b:00007f55d0924188 EFLAGS: 00000246
RBP: 00007fc4516251d0 R08: 0000000000000000 R09: 0000000000000000
 ORIG_RAX: 000000000000002e
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000466459
R13: 00007ffd4fd69a6f R14: 00007fc451625300 R15: 0000000000022000
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000004
RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffe0e4d0acf R14: 00007f55d0924300 R15: 0000000000022000
Code: 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 96 01 00 00 48 8b 93 18 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 d1 48 c1 e9 03 <0f> b6 0c 01 48 89 d0 83 e0 07 83 c0 01 38 c8 7c 08 84 c9 0f 85 
RIP: nla_len include/net/netlink.h:706 [inline] RSP: ffff88809ffd76e0
RIP: nla_parse_nested include/net/netlink.h:765 [inline] RSP: ffff88809ffd76e0
RIP: nl802154_del_llsec_dev+0x13b/0x2e0 net/ieee802154/nl802154.c:1783 RSP: ffff88809ffd76e0
---[ end trace c238e4a2239b5ddb ]---