kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 18517 Comm: syz-executor4 Not tainted 4.20.0+ #362 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__xfrm_policy_eval_candidates net/xfrm/xfrm_policy.c:2019 [inline] RIP: 0010:xfrm_policy_eval_candidates net/xfrm/xfrm_policy.c:2053 [inline] RIP: 0010:xfrm_policy_lookup_bytype+0xc1b/0xe70 net/xfrm/xfrm_policy.c:2113 Code: 7f fe ff ff e8 76 f4 bd fa 4d 89 e6 49 83 ee 08 0f 84 6d fe ff ff e8 64 f4 bd fa 49 8d bc 24 ac 00 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 14 28 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 kobject: 'loop2' (00000000804e81cc): kobject_uevent_env RSP: 0018:ffff8880ae606810 EFLAGS: 00010202 RAX: 0910e8fd1cb12920 RBX: 0000000000000000 RCX: ffffffff86c3b16c RDX: 0000000000000100 RSI: ffffffff86c3b18c RDI: 488747e8e5894901 RBP: ffff8880ae606ac8 R08: ffff88809d2a64c0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 488747e8e5894855 R13: dffffc0000000000 R14: 488747e8e589484d R15: 00000000ffffffff FS: 00007f05674c1700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 kobject: 'loop2' (00000000804e81cc): fill_kobj_path: path = '/devices/virtual/block/loop2' CR2: 0000001b2c7208a4 CR3: 000000006a3cd000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: xfrm_policy_lookup+0x7e/0x80 net/xfrm/xfrm_policy.c:2145 __xfrm_policy_check+0x14f0/0x2c40 net/xfrm/xfrm_policy.c:3354 __xfrm_policy_check2 include/net/xfrm.h:1166 [inline] xfrm_policy_check include/net/xfrm.h:1175 [inline] xfrm6_policy_check include/net/xfrm.h:1185 [inline] udpv6_queue_rcv_one_skb+0x517/0x16b0 net/ipv6/udp.c:615 udpv6_queue_rcv_skb+0x594/0x8f0 net/ipv6/udp.c:699 __udp6_lib_mcast_deliver net/ipv6/udp.c:812 [inline] __udp6_lib_rcv+0x1ecf/0x3190 net/ipv6/udp.c:916 udpv6_rcv+0x21/0x30 net/ipv6/udp.c:1026 ip6_protocol_deliver_rcu+0x372/0x1940 net/ipv6/ip6_input.c:394 ip6_input_finish+0x84/0x170 net/ipv6/ip6_input.c:434 NF_HOOK include/linux/netfilter.h:289 [inline] ip6_input+0xe9/0x600 net/ipv6/ip6_input.c:443 ip6_mc_input+0x514/0x11c0 net/ipv6/ip6_input.c:537 dst_input include/net/dst.h:450 [inline] ip6_rcv_finish+0x17a/0x330 net/ipv6/ip6_input.c:76 NF_HOOK include/linux/netfilter.h:289 [inline] ipv6_rcv+0x115/0x640 net/ipv6/ip6_input.c:272 __netif_receive_skb_one_core+0x14d/0x200 net/core/dev.c:4973 __netif_receive_skb+0x2c/0x1e0 net/core/dev.c:5083 process_backlog+0x217/0x760 net/core/dev.c:5923 napi_poll net/core/dev.c:6346 [inline] net_rx_action+0x7c5/0x1950 net/core/dev.c:6412 __do_softirq+0x30c/0xb2e kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1027 do_softirq.part.13+0x126/0x160 kernel/softirq.c:337 do_softirq+0x19/0x20 kernel/softirq.c:340 netif_rx_ni+0x521/0x870 net/core/dev.c:4569 dev_loopback_xmit+0x287/0x8c0 net/core/dev.c:3576 NF_HOOK include/linux/netfilter.h:289 [inline] ip6_finish_output2+0x193a/0x2930 net/ipv6/ip6_output.c:84 ip6_finish_output+0x583/0xc50 net/ipv6/ip6_output.c:154 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip6_output+0x232/0x9d0 net/ipv6/ip6_output.c:171 dst_output include/net/dst.h:444 [inline] ip6_local_out+0xc5/0x1b0 net/ipv6/output_core.c:176 ip6_send_skb+0xbc/0x340 net/ipv6/ip6_output.c:1727 udp_v6_send_skb.isra.32+0x831/0x14a0 net/ipv6/udp.c:1169 udpv6_sendmsg+0x2d86/0x36a0 net/ipv6/udp.c:1466 inet_sendmsg+0x1a1/0x690 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:631 __sys_sendto+0x3d7/0x670 net/socket.c:1788 __do_sys_sendto net/socket.c:1800 [inline] __se_sys_sendto net/socket.c:1796 [inline] __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1796 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4579b9 Code: fd b3 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 b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f05674c0c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00000000004579b9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 000000000073bf00 R08: 00000000200000c0 R09: 000000000000001c R10: 0000000000000000 R11: 0000000000000246 R12: 00007f05674c16d4 R13: 00000000004c4e37 R14: 00000000004d8640 R15: 00000000ffffffff Modules linked in: ---[ end trace 87d6d12a5bace35e ]--- RIP: 0010:__xfrm_policy_eval_candidates net/xfrm/xfrm_policy.c:2019 [inline] RIP: 0010:xfrm_policy_eval_candidates net/xfrm/xfrm_policy.c:2053 [inline] RIP: 0010:xfrm_policy_lookup_bytype+0xc1b/0xe70 net/xfrm/xfrm_policy.c:2113 Code: 7f fe ff ff e8 76 f4 bd fa 4d 89 e6 49 83 ee 08 0f 84 6d fe ff ff e8 64 f4 bd fa 49 8d bc 24 ac 00 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 14 28 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 RSP: 0018:ffff8880ae606810 EFLAGS: 00010202 kobject: 'loop1' (00000000de3ef3e3): kobject_uevent_env RAX: 0910e8fd1cb12920 RBX: 0000000000000000 RCX: ffffffff86c3b16c RDX: 0000000000000100 RSI: ffffffff86c3b18c RDI: 488747e8e5894901 RBP: ffff8880ae606ac8 R08: ffff88809d2a64c0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 488747e8e5894855 R13: dffffc0000000000 R14: 488747e8e589484d R15: 00000000ffffffff FS: 00007f05674c1700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 kobject: 'loop1' (00000000de3ef3e3): fill_kobj_path: path = '/devices/virtual/block/loop1' CR2: 0000001b2c7208a4 CR3: 000000006a3cd000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400