dst_release: dst:000000002f51a6ea refcnt:-30592 dst_release: dst:000000002f51a6ea refcnt:-30592 BUG: unable to handle page fault for address: ffffffffffff88c0 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 8a70067 P4D 8a70067 PUD 8a72067 PMD 0 Oops: 0002 [#1] PREEMPT SMP KASAN CPU: 0 PID: 31565 Comm: syz-executor.0 Not tainted 5.2.0-rc3+ #26 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:arch_atomic_add_return arch/x86/include/asm/atomic.h:167 [inline] RIP: 0010:arch_atomic_sub_return arch/x86/include/asm/atomic.h:179 [inline] RIP: 0010:atomic_sub_return include/asm-generic/atomic-instrumented.h:160 [inline] RIP: 0010:atomic_dec_return include/linux/atomic-fallback.h:455 [inline] RIP: 0010:dst_release net/core/dst.c:174 [inline] RIP: 0010:dst_release+0x2f/0xb0 net/core/dst.c:169 Code: 55 41 54 49 89 fc 53 e8 df 67 eb fb 4d 85 e4 74 47 e8 d5 67 eb fb 49 8d 7c 24 40 be 04 00 00 00 e8 26 0f 24 fc be ff ff ff ff 41 0f c1 74 24 40 44 8d 6e ff 31 ff 44 89 ee e8 2c 69 eb fb 45 RSP: 0018:ffff8880ae808f48 EFLAGS: 00010246 RAX: fffffbfffffff119 RBX: 0000000000000001 RCX: ffffffff8585403a RDX: 0000000000000001 RSI: 00000000ffffffff RDI: ffffffffffff88c0 RBP: ffff8880ae808f60 R08: 1ffffffffffff118 R09: fffffbfffffff119 R10: fffffbfffffff118 R11: ffffffffffff88c3 R12: ffffffffffff8880 R13: dffffc0000000000 R14: ffff8880692b4c00 R15: 0000000000000000 FS: 00007f0243c90700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffff88c0 CR3: 00000000a4734000 CR4: 00000000001406f0 Call Trace: sctp_v6_get_dst+0x11d0/0x1ce0 net/sctp/ipv6.c:310 sctp_transport_route+0x12d/0x360 net/sctp/transport.c:297 sctp_assoc_add_peer+0x53e/0xfc0 net/sctp/associola.c:663 sctp_process_param net/sctp/sm_make_chunk.c:2522 [inline] sctp_process_init+0x2458/0x2ad0 net/sctp/sm_make_chunk.c:2343 sctp_sf_do_5_1B_init+0x8ba/0xe50 net/sctp/sm_statefuns.c:401 sctp_do_sm+0x121/0x5190 net/sctp/sm_sideeffect.c:1152 sctp_endpoint_bh_rcv+0x451/0x950 net/sctp/endpointola.c:443 sctp_inq_push+0x1e4/0x280 net/sctp/inqueue.c:80 sctp_rcv+0x2807/0x35c0 net/sctp/input.c:256 sctp6_rcv+0x17/0x30 net/sctp/ipv6.c:1049 ip6_protocol_deliver_rcu+0x2fe/0x16c0 net/ipv6/ip6_input.c:397 ip6_input_finish+0x84/0x170 net/ipv6/ip6_input.c:438 NF_HOOK include/linux/netfilter.h:305 [inline] NF_HOOK include/linux/netfilter.h:299 [inline] ip6_input+0xe4/0x3f0 net/ipv6/ip6_input.c:447 dst_input include/net/dst.h:439 [inline] ip6_rcv_finish+0x1de/0x310 net/ipv6/ip6_input.c:76 NF_HOOK include/linux/netfilter.h:305 [inline] NF_HOOK include/linux/netfilter.h:299 [inline] ipv6_rcv+0x10e/0x420 net/ipv6/ip6_input.c:272 __netif_receive_skb_one_core+0x113/0x1a0 net/core/dev.c:4981 __netif_receive_skb+0x2c/0x1d0 net/core/dev.c:5095 process_backlog+0x206/0x750 net/core/dev.c:5906 napi_poll net/core/dev.c:6329 [inline] net_rx_action+0x4f5/0x1070 net/core/dev.c:6395 __do_softirq+0x25c/0x94c kernel/softirq.c:293 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1040 do_softirq.part.0+0x11a/0x170 kernel/softirq.c:338 do_softirq kernel/softirq.c:330 [inline] __local_bh_enable_ip+0x211/0x270 kernel/softirq.c:190 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:682 [inline] ip6_finish_output2+0x10a0/0x2550 net/ipv6/ip6_output.c:117 __ip6_finish_output+0x444/0xaa0 net/ipv6/ip6_output.c:142 ip6_finish_output+0x38/0x1f0 net/ipv6/ip6_output.c:152 NF_HOOK_COND include/linux/netfilter.h:294 [inline] ip6_output+0x235/0x7f0 net/ipv6/ip6_output.c:175 dst_output include/net/dst.h:433 [inline] NF_HOOK include/linux/netfilter.h:305 [inline] NF_HOOK include/linux/netfilter.h:299 [inline] ip6_xmit+0xe35/0x20b0 net/ipv6/ip6_output.c:279 sctp_v6_xmit+0x313/0x660 net/sctp/ipv6.c:217 sctp_packet_transmit+0x1ba5/0x36c0 net/sctp/output.c:626 sctp_packet_singleton net/sctp/outqueue.c:772 [inline] sctp_outq_flush_ctrl.constprop.0+0x73c/0xd30 net/sctp/outqueue.c:903 sctp_outq_flush+0xe8/0x2780 net/sctp/outqueue.c:1185 sctp_outq_uncork+0x6c/0x80 net/sctp/outqueue.c:757 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1781 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1184 [inline] sctp_do_sm+0x504/0x5190 net/sctp/sm_sideeffect.c:1155 sctp_primitive_ASSOCIATE+0x9d/0xd0 net/sctp/primitive.c:73 __sctp_connect+0x8c3/0xcd0 net/sctp/socket.c:1211 __sctp_setsockopt_connectx+0x133/0x1a0 net/sctp/socket.c:1334 sctp_setsockopt_connectx_old net/sctp/socket.c:1350 [inline] sctp_setsockopt net/sctp/socket.c:4644 [inline] sctp_setsockopt+0x22c0/0x6d10 net/sctp/socket.c:4608 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:3124 __sys_setsockopt+0x17a/0x280 net/socket.c:2072 __do_sys_setsockopt net/socket.c:2083 [inline] __se_sys_setsockopt net/socket.c:2080 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:2080 do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459279 Code: fd b7 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 b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f0243c8fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000459279 RDX: 000000000000006b RSI: 0000000000000084 RDI: 0000000000000006 RBP: 000000000075bf20 R08: 000000000000001c R09: 0000000000000000 R10: 000000002055bfe4 R11: 0000000000000246 R12: 00007f0243c906d4 R13: 00000000004ced30 R14: 00000000004dd470 R15: 00000000ffffffff Modules linked in: CR2: ffffffffffff88c0 ---[ end trace cfa141a06491f877 ]--- RIP: 0010:arch_atomic_add_return arch/x86/include/asm/atomic.h:167 [inline] RIP: 0010:arch_atomic_sub_return arch/x86/include/asm/atomic.h:179 [inline] RIP: 0010:atomic_sub_return include/asm-generic/atomic-instrumented.h:160 [inline] RIP: 0010:atomic_dec_return include/linux/atomic-fallback.h:455 [inline] RIP: 0010:dst_release net/core/dst.c:174 [inline] RIP: 0010:dst_release+0x2f/0xb0 net/core/dst.c:169 Code: 55 41 54 49 89 fc 53 e8 df 67 eb fb 4d 85 e4 74 47 e8 d5 67 eb fb 49 8d 7c 24 40 be 04 00 00 00 e8 26 0f 24 fc be ff ff ff ff 41 0f c1 74 24 40 44 8d 6e ff 31 ff 44 89 ee e8 2c 69 eb fb 45 RSP: 0018:ffff8880ae808f48 EFLAGS: 00010246 RAX: fffffbfffffff119 RBX: 0000000000000001 RCX: ffffffff8585403a RDX: 0000000000000001 RSI: 00000000ffffffff RDI: ffffffffffff88c0 RBP: ffff8880ae808f60 R08: 1ffffffffffff118 R09: fffffbfffffff119 R10: fffffbfffffff118 R11: ffffffffffff88c3 R12: ffffffffffff8880 R13: dffffc0000000000 R14: ffff8880692b4c00 R15: 0000000000000000 FS: 00007f0243c90700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffff88c0 CR3: 00000000a4734000 CR4: 00000000001406f0