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
Modules linked in:
CPU: 0 PID: 26034 Comm: syz-executor.4 Not tainted 4.4.174+ #17
task: ffff8801bc715f00 task.stack: ffff88007ec48000
RIP: 0010:[<ffffffff822eee2b>]  [<ffffffff822eee2b>] netlink_getsockbyportid net/netlink/af_netlink.c:1112 [inline]
RIP: 0010:[<ffffffff822eee2b>]  [<ffffffff822eee2b>] netlink_unicast+0x1cb/0x700 net/netlink/af_netlink.c:1297
RSP: 0018:ffff88007ec4f738  EFLAGS: 00010216
RAX: dffffc0000000048 RBX: 0000000000000000 RCX: ffffc90003d7f000
RDX: 0000000000000404 RSI: ffffffff822eee24 RDI: ffff8800b48e3d58
RBP: ffff88007ec4f7f0 R08: 1ffff100166b49e2 R09: ffffed00166b49e7
R10: ffffed00166b49e6 R11: ffff8800b35a4f37 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff8800b48e3c80 R15: 0000000000000c1e
FS:  0000000000000000(0000) GS:ffff8801db600000(0063) knlGS:00000000f5517b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000008370004 CR3: 00000000b75db000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8800b35a4fc0 0000000000000030 0000000000000240 1ffff1000fd89eed
 dffffc0000000006 dffffc0000000048 0000000041b58ab3 ffffffff82c9f14a
 ffffffff822eec60 ffffffff821f812c 0000000000000000 ffff8800b35a4f00
Call Trace:
 [<ffffffff822f0386>] netlink_ack+0x236/0x4c0 net/netlink/af_netlink.c:2334
 [<ffffffff822ff60d>] nfnetlink_rcv_batch net/netfilter/nfnetlink.c:319 [inline]
 [<ffffffff822ff60d>] nfnetlink_rcv+0xbdd/0x12b0 net/netfilter/nfnetlink.c:477
 [<ffffffff822ef137>] netlink_unicast_kernel net/netlink/af_netlink.c:1277 [inline]
 [<ffffffff822ef137>] netlink_unicast+0x4d7/0x700 net/netlink/af_netlink.c:1303
 [<ffffffff822efb86>] netlink_sendmsg+0x6b6/0xc80 net/netlink/af_netlink.c:1859
 [<ffffffff821d838e>] sock_sendmsg_nosec net/socket.c:638 [inline]
 [<ffffffff821d838e>] sock_sendmsg+0xbe/0x110 net/socket.c:648
 [<ffffffff821da269>] ___sys_sendmsg+0x769/0x890 net/socket.c:1975
 [<ffffffff821dd0c5>] __sys_sendmsg+0xc5/0x160 net/socket.c:2009
 [<ffffffff822acdda>] C_SYSC_sendmsg net/compat.c:725 [inline]
 [<ffffffff822acdda>] compat_SyS_sendmsg+0x2a/0x40 net/compat.c:723
 [<ffffffff8100603d>] do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline]
 [<ffffffff8100603d>] do_fast_syscall_32+0x32d/0xa90 arch/x86/entry/common.c:397
 [<ffffffff8271a350>] sysenter_flags_fixed+0xd/0x1a
Code: ec a7 01 ff 48 8d 55 98 48 89 d9 4c 89 f6 4c 89 e7 e8 fa f6 ff ff [  756.190125] SELinux:  policydb magic number 0x464c457f does not match expected magic number 0xf97cff8c
SELinux:  policydb magic number 0x464c457f does not match expected magic number 0xf97cff8c
83 f8 01 0f 85 e6 03 00 00 e8 cc a7 01 ff 48 8b 85 70 ff ff ff <0f> b6 00 84 c0 74 08 3c 03 0f 8e 16 04 00 00 48 8b 85 68 ff ff 
RIP  [<ffffffff822eee2b>] netlink_getsockbyportid net/netlink/af_netlink.c:1112 [inline]
RIP  [<ffffffff822eee2b>] netlink_unicast+0x1cb/0x700 net/netlink/af_netlink.c:1297
 RSP <ffff88007ec4f738>
---[ end trace 4ee8460383a3556b ]---