------------[ cut here ]------------ kernel BUG at net/ipv6/route.c:1252! invalid opcode: 0000 [#1] SMP PTI CPU: 1 PID: 26378 Comm: syz-executor1 Not tainted 4.18.0-rc5+ #29 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:dst_hold include/net/dst.h:239 [inline] RIP: 0010:rt6_make_pcpu_route net/ipv6/route.c:1249 [inline] RIP: 0010:ip6_pol_route+0x295a/0x32b0 net/ipv6/route.c:1909 Code: da 01 00 00 8b 7d ac e8 f4 ab dd f8 eb c0 8b 3a e8 eb ab dd f8 eb c9 8b 7d c4 e8 e1 ab dd f8 eb cd e8 5a f7 81 f8 0f 0b eb 95 <0f> 0b 0f 1f 40 00 eb fe 8b 7d b0 e8 c6 ab dd f8 e9 a9 f9 ff ff 89 RSP: 0018:ffff88021fd0e5e0 EFLAGS: 00010286 RAX: ffff880100000000 RBX: ffffe8ffffd40000 RCX: ffff880153015780 RDX: ffff880153015780 RSI: aaaaaaaaaaaab000 RDI: ffffea0008035ce0 RBP: ffff88021fd0e738 R08: ffffffff7fffffff R09: ffff880122328f70 R10: 0000000000000002 R11: ffffffff88e657d0 R12: 0000000000000000 R13: 0000000000000000 R14: ffff88011a38bf00 R15: ffff88011a38bf40 FS: 00007fec51447700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000444a40 CR3: 0000000125066000 CR4: 00000000001406e0 DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: ip6_pol_route_output+0x11b/0x140 net/ipv6/route.c:2082 fib6_rule_lookup+0x33c/0x800 net/ipv6/fib6_rules.c:118 ip6_route_output_flags+0x504/0x5a0 net/ipv6/route.c:2110 ip6_route_output include/net/ip6_route.h:82 [inline] ip6_dst_lookup_tail+0xecb/0x1d00 net/ipv6/ip6_output.c:949 ip6_dst_lookup_flow+0x109/0x290 net/ipv6/ip6_output.c:1077 sctp_v6_get_dst+0x73d/0x1ce0 net/sctp/ipv6.c:274 sctp_transport_route+0x22e/0xc60 net/sctp/transport.c:303 sctp_assoc_add_peer+0x815/0x1de0 net/sctp/associola.c:656 sctp_process_param net/sctp/sm_make_chunk.c:2540 [inline] sctp_process_init+0x19c0/0x3f30 net/sctp/sm_make_chunk.c:2356 sctp_sf_do_5_1B_init+0xe52/0x1ba0 net/sctp/sm_statefuns.c:416 sctp_do_sm+0x2d9/0x9fe0 net/sctp/sm_sideeffect.c:1188 sctp_endpoint_bh_rcv+0xd55/0x1040 net/sctp/endpointola.c:456 sctp_inq_push+0x314/0x460 net/sctp/inqueue.c:95 sctp_rcv+0x48d2/0x52c0 net/sctp/input.c:267 sctp6_rcv+0x41/0x70 net/sctp/ipv6.c:1045 ip6_input_finish+0x1353/0x22b0 net/ipv6/ip6_input.c:284 NF_HOOK include/linux/netfilter.h:287 [inline] ip6_input+0x2a1/0x340 net/ipv6/ip6_input.c:327 dst_input include/net/dst.h:450 [inline] ip6_rcv_finish+0x498/0x6e0 net/ipv6/ip6_input.c:71 NF_HOOK include/linux/netfilter.h:287 [inline] ipv6_rcv+0x1ea9/0x2250 net/ipv6/ip6_input.c:208 __netif_receive_skb_core+0x4a7a/0x4fc0 net/core/dev.c:4628 __netif_receive_skb net/core/dev.c:4693 [inline] process_backlog+0x664/0xe60 net/core/dev.c:5373 napi_poll net/core/dev.c:5771 [inline] net_rx_action+0x799/0x1ae0 net/core/dev.c:5837 __do_softirq+0x55f/0x934 kernel/softirq.c:288 do_softirq_own_stack+0x49/0x80 arch/x86/entry/entry_64.S:1054 do_softirq kernel/softirq.c:332 [inline] __local_bh_enable_ip+0x134/0x170 kernel/softirq.c:185 local_bh_enable+0x36/0x40 include/linux/bottom_half.h:32 rcu_read_unlock_bh include/linux/rcupdate.h:725 [inline] ip6_finish_output2+0x1e23/0x2280 net/ipv6/ip6_output.c:121 ip6_finish_output+0xaf0/0xbb0 net/ipv6/ip6_output.c:154 NF_HOOK_COND include/linux/netfilter.h:276 [inline] ip6_output+0x5c5/0x710 net/ipv6/ip6_output.c:171 dst_output include/net/dst.h:444 [inline] NF_HOOK include/linux/netfilter.h:287 [inline] ip6_xmit+0x2211/0x2570 net/ipv6/ip6_output.c:277 sctp_v6_xmit+0x48d/0x570 net/sctp/ipv6.c:225 sctp_packet_transmit+0x42b3/0x4760 net/sctp/output.c:650 sctp_packet_singleton net/sctp/outqueue.c:791 [inline] sctp_outq_flush_ctrl net/sctp/outqueue.c:922 [inline] sctp_outq_flush+0x9df/0x6090 net/sctp/outqueue.c:1203 sctp_outq_uncork+0xd2/0xf0 net/sctp/outqueue.c:776 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1820 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1220 [inline] sctp_do_sm+0x9919/0x9fe0 net/sctp/sm_sideeffect.c:1191 sctp_primitive_ASSOCIATE+0x172/0x1a0 net/sctp/primitive.c:88 sctp_sendmsg_to_asoc+0x195a/0x2890 net/sctp/socket.c:1936 sctp_sendmsg+0x3f3e/0x6500 net/sctp/socket.c:2124 inet_sendmsg+0x3fc/0x760 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:641 [inline] sock_sendmsg net/socket.c:651 [inline] __sys_sendto+0x798/0x8e0 net/socket.c:1797 __do_sys_sendto net/socket.c:1809 [inline] __se_sys_sendto net/socket.c:1805 [inline] __x64_sys_sendto+0x1a1/0x210 net/socket.c:1805 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x456959 Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fec51446c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fec514476d4 RCX: 0000000000456959 RDX: 0000000000000001 RSI: 0000000020e33fe0 RDI: 0000000000000014 RBP: 000000000072be80 R08: 000000002005ffe4 R09: 000000000000001c R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004d30c0 R14: 00000000004c7d40 R15: 0000000000000000 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace 313f4846f660c0ea ]--- RIP: 0010:dst_hold include/net/dst.h:239 [inline] RIP: 0010:rt6_make_pcpu_route net/ipv6/route.c:1249 [inline] RIP: 0010:ip6_pol_route+0x295a/0x32b0 net/ipv6/route.c:1909 Code: da 01 00 00 8b 7d ac e8 f4 ab dd f8 eb c0 8b 3a e8 eb ab dd f8 eb c9 8b 7d c4 e8 e1 ab dd f8 eb cd e8 5a f7 81 f8 0f 0b eb 95 <0f> 0b 0f 1f 40 00 eb fe 8b 7d b0 e8 c6 ab dd f8 e9 a9 f9 ff ff 89 RSP: 0018:ffff88021fd0e5e0 EFLAGS: 00010286 RAX: ffff880100000000 RBX: ffffe8ffffd40000 RCX: ffff880153015780 RDX: ffff880153015780 RSI: aaaaaaaaaaaab000 RDI: ffffea0008035ce0 RBP: ffff88021fd0e738 R08: ffffffff7fffffff R09: ffff880122328f70 R10: 0000000000000002 R11: ffffffff88e657d0 R12: 0000000000000000 R13: 0000000000000000 R14: ffff88011a38bf00 R15: ffff88011a38bf40 FS: 00007fec51447700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000444a40 CR3: 0000000125066000 CR4: 00000000001406e0 DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600