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: 9835 Comm: syz-executor.1 Not tainted 4.4.174+ #17 task: ffff8800af01c740 task.stack: ffff880097ce8000 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:ffff880097cef738 EFLAGS: 00010216 RAX: dffffc0000000048 RBX: 0000000000000000 RCX: ffffc90002f60000 RDX: 00000000000226f6 RSI: ffffffff822eee24 RDI: ffff8800b35dc5d8 RBP: ffff880097cef7f0 R08: 1ffff1003b105542 R09: ffffed003b105545 R10: ffffed003b105544 R11: ffff8801d882aa27 R12: dffffc0000000000 R13: dffffc0000000000 R14: ffff8800b35dc500 R15: 00000000000003c0 FS: 0000000000000000(0000) GS:ffff8801db600000(0063) knlGS:00000000f556bb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000020a401bf CR3: 00000001cff64000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffff8801d882aac0 0000000000000030 0000000000000240 1ffff10012f9deed dffffc0000000006 dffffc0000000048 0000000041b58ab3 ffffffff82c9f14a ffffffff822eec60 ffffffff821f812c 0000000000000000 ffff8801d882aa00 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 [] C_SYSC_sendmsg net/compat.c:725 [inline] [] compat_SyS_sendmsg+0x2a/0x40 net/compat.c:723 [] do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline] [] do_fast_syscall_32+0x32d/0xa90 arch/x86/entry/common.c:397 [] 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 [] netlink_getsockbyportid net/netlink/af_netlink.c:1112 [inline] RIP [] netlink_unicast+0x1cb/0x700 net/netlink/af_netlink.c:1297 RSP ---[ end trace d494ec6036ec1726 ]---