kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
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Modules linked in:
CPU: 1 PID: 3324 Comm: syzkaller979131 Not tainted 4.4.107-g610c835 #12
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d159c740 task.stack: ffff8801d0cd0000
RIP: 0010:[<ffffffff82f89610>]  [<ffffffff82f89610>] netlink_getsockbyportid net/netlink/af_netlink.c:1058 [inline]
RIP: 0010:[<ffffffff82f89610>]  [<ffffffff82f89610>] netlink_unicast+0x1c0/0x760 net/netlink/af_netlink.c:1243
RSP: 0018:ffff8801d0cd7778  EFLAGS: 00010293
RAX: dffffc0000000048 RBX: dffffc0000000000 RCX: ffffffff82f89609
RDX: 0000000000000000 RSI: 00000000024000c0 RDI: ffff8801d15b2498
RBP: ffff8801d0cd7838 R08: ffffed003a2a8b75 R09: ffffed003a2a8b75
R10: 0000000000000003 R11: ffffed003a2a8b74 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8801d15b23c0 R15: dffffc0000000006
FS:  0000000000fc4880(0063) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020d22fec CR3: 00000001d15c9000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 1ffff1003a19aef6 ffff8801d1545b80 0000000000000240 0000000000000030
 1ffff1003a19aef6 dffffc0000000048 0000000000000cfc 0000000041b58ab3
 ffffffff83ffe7ee ffffffff82f89450 ffff8801d15b23c0 0000000000000000
Call Trace:
 [<ffffffff82f8aa31>] netlink_ack+0x231/0x4b0 net/netlink/af_netlink.c:2278
 [<ffffffff82f987b2>] nfnetlink_rcv_batch net/netfilter/nfnetlink.c:319 [inline]
 [<ffffffff82f987b2>] nfnetlink_rcv+0xaa2/0x1070 net/netfilter/nfnetlink.c:477
 [<ffffffff82f89972>] netlink_unicast_kernel net/netlink/af_netlink.c:1223 [inline]
 [<ffffffff82f89972>] netlink_unicast+0x522/0x760 net/netlink/af_netlink.c:1249
 [<ffffffff82f8a498>] netlink_sendmsg+0x8e8/0xc50 net/netlink/af_netlink.c:1803
 [<ffffffff82dec59a>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82dec59a>] sock_sendmsg+0xca/0x110 net/socket.c:635
 [<ffffffff82dee171>] ___sys_sendmsg+0x6c1/0x7c0 net/socket.c:1962
 [<ffffffff82df01c3>] __sys_sendmsg+0xd3/0x190 net/socket.c:1996
 [<ffffffff82df02ad>] SYSC_sendmsg net/socket.c:2007 [inline]
 [<ffffffff82df02ad>] SyS_sendmsg+0x2d/0x50 net/socket.c:2003
 [<ffffffff83773d36>] entry_SYSCALL_64_fastpath+0x16/0x76
Code: 47 45 3d fe 48 8d 55 98 4c 89 e1 4c 89 f6 48 89 df e8 95 f7 ff ff 83 f8 01 0f 85 e1 03 00 00 e8 27 45 3d fe 48 8b 85 68 ff ff ff <0f> b6 00 84 c0 74 08 3c 03 0f 8e 63 05 00 00 41 80 3f 00 41 0f 
RIP  [<ffffffff82f89610>] netlink_getsockbyportid net/netlink/af_netlink.c:1058 [inline]
RIP  [<ffffffff82f89610>] netlink_unicast+0x1c0/0x760 net/netlink/af_netlink.c:1243
 RSP <ffff8801d0cd7778>
---[ end trace f0a35d45dcd12d52 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
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Kernel Offset: disabled
Rebooting in 86400 seconds..