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: 1 PID: 3669 Comm: syz-executor.0 Not tainted 4.4.174+ #17
task: ffff8801cf08af80 task.stack: ffff8800bb5a8000
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:ffff8800bb5af548  EFLAGS: 00010202
RAX: dffffc0000000048 RBX: 0000000000000000 RCX: ffffc90001547000
RDX: 0000000000000b50 RSI: ffffffff822eee24 RDI: ffff8801d71ab5d8
RBP: ffff8800bb5af600 R08: 1ffff10017484142 R09: ffffed0017484145
R10: ffffed0017484144 R11: ffff8800ba420a23 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff8801d71ab500 R15: 00000000000000b3
FS:  0000000000000000(0000) GS:ffff8801db700000(0063) knlGS:00000000f5572b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000200df4ff CR3: 00000001d11b4000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8800ba420ac0 0000000000000030 0000000000000240 1ffff100176b5eaf
 dffffc0000000006 dffffc0000000048 0000000041b58ab3 ffffffff82c9f14a
 ffffffff822eec60 ffffffff821f812c 0000000000000000 ffff8800ba420a00
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
 [<ffffffff821d87f4>] kernel_sendmsg+0x44/0x50 net/socket.c:656
 [<ffffffff821e30a6>] sock_no_sendpage+0x116/0x150 net/core/sock.c:2283
 [<ffffffff821d81b5>] kernel_sendpage+0x95/0xf0 net/socket.c:3320
 [<ffffffff821d829b>] sock_sendpage+0x8b/0xc0 net/socket.c:793
 [<ffffffff81530f1d>] pipe_to_sendpage+0x28d/0x3d0 fs/splice.c:724
 [<ffffffff81533b6e>] splice_from_pipe_feed fs/splice.c:776 [inline]
 [<ffffffff81533b6e>] __splice_from_pipe+0x37e/0x7a0 fs/splice.c:901
 [<ffffffff81536be8>] splice_from_pipe+0x108/0x170 fs/splice.c:936
 [<ffffffff81536c8c>] generic_splice_sendpage+0x3c/0x50 fs/splice.c:1109
 [<ffffffff81537d31>] do_splice_from fs/splice.c:1128 [inline]
 [<ffffffff81537d31>] do_splice fs/splice.c:1404 [inline]
 [<ffffffff81537d31>] SYSC_splice fs/splice.c:1707 [inline]
 [<ffffffff81537d31>] SyS_splice+0xd71/0x13a0 fs/splice.c:1690
 [<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 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 <ffff8800bb5af548>
---[ end trace e82f498d34a7f331 ]---