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: 397 Comm: syz-executor.0 Not tainted 4.4.174+ #4 task: ffff8801be6117c0 task.stack: ffff8801696b8000 RIP: 0010:[] [] netlink_getsockbyportid net/netlink/af_netlink.c:1112 [inline] RIP: 0010:[] [] netlink_unicast+0x1cb/0x700 net/netlink/af_netlink.c:1297 RSP: 0018:ffff8801696bf7b8 EFLAGS: 00010212 RAX: dffffc0000000048 RBX: 0000000000000000 RCX: ffffc90004718000 RDX: 00000000000008f5 RSI: ffffffff822eee24 RDI: ffff8801ce8ad5d8 RBP: ffff8801696bf870 R08: 1ffff10014919452 R09: ffffed0014919457 R10: ffffed0014919456 R11: ffff8800a48ca2b7 R12: dffffc0000000000 R13: dffffc0000000000 R14: ffff8801ce8ad500 R15: 0000000000000f77 FS: 00007fba65c76700(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2f721000 CR3: 0000000184e6e000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffff8800a48ca340 0000000000000030 0000000000000240 1ffff1002d2d7efd dffffc0000000006 dffffc0000000048 0000000041b58ab3 ffffffff82c9f14a ffffffff822eec60 ffffffff821f812c 0000000000000000 ffff8800a48ca280 Call Trace: [] netlink_ack+0x236/0x4c0 net/netlink/af_netlink.c:2334 [] nfnetlink_rcv_batch net/netfilter/nfnetlink.c:319 [inline] [] nfnetlink_rcv+0xbdd/0x12b0 net/netfilter/nfnetlink.c:477 [] netlink_unicast_kernel net/netlink/af_netlink.c:1277 [inline] [] netlink_unicast+0x4d7/0x700 net/netlink/af_netlink.c:1303 [] netlink_sendmsg+0x6b6/0xc80 net/netlink/af_netlink.c:1859 [] sock_sendmsg_nosec net/socket.c:638 [inline] [] sock_sendmsg+0xbe/0x110 net/socket.c:648 [] ___sys_sendmsg+0x769/0x890 net/socket.c:1975 [] __sys_sendmsg+0xc5/0x160 net/socket.c:2009 [] SYSC_sendmsg net/socket.c:2020 [inline] [] SyS_sendmsg+0x2d/0x50 net/socket.c:2016 [] entry_SYSCALL_64_fastpath+0x1e/0x9a 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 [] netlink_getsockbyportid net/netlink/af_netlink.c:1112 [inline] RIP [] netlink_unicast+0x1cb/0x700 net/netlink/af_netlink.c:1297 RSP ---[ end trace ea450efe325a6882 ]---