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: 1 PID: 11416 Comm: syz-executor5 Not tainted 5.0.0-rc3-next-20190123 #18 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:nf_ct_gre_keymap_flush+0xb9/0x2f0 net/netfilter/nf_conntrack_proto_gre.c:65 Code: 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 0f 85 2b 02 00 00 4c 8b bb f8 16 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 f9 48 c1 e9 03 <80> 3c 01 00 0f 85 fc 01 00 00 4c 3b bd 68 ff ff ff 4d 8b 27 0f 84 RSP: 0018:ffff88809f1af698 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff88808e4045c0 RCX: 0000000000000000 RDX: 1ffffffff146dff2 RSI: 0000000000000004 RDI: ffff88809f1af600 RBP: ffff88809f1af748 R08: 1ffff11013e35ec0 R09: ffffed1013e35ec1 R10: ffffed1013e35ec0 R11: 0000000000000003 R12: dffffc0000000000 R13: ffff88809f1af858 R14: ffff88808e405cb8 R15: 0000000000000000 FS: 00007fb608cb6700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2ff3a000 CR3: 000000006a566000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: nf_conntrack_proto_pernet_fini+0x16/0x1a net/netfilter/nf_conntrack_proto.c:617 nf_conntrack_cleanup_net_list+0x204/0x330 net/netfilter/nf_conntrack_core.c:2183 nf_conntrack_cleanup_net+0x1c5/0x270 net/netfilter/nf_conntrack_core.c:2156 nf_conntrack_pernet_init net/netfilter/nf_conntrack_standalone.c:1122 [inline] nf_conntrack_pernet_init+0xc3f/0xf00 net/netfilter/nf_conntrack_standalone.c:1091 ops_init+0x109/0x5d0 net/core/net_namespace.c:129 setup_net+0x38f/0x940 net/core/net_namespace.c:314 copy_net_ns+0x2ae/0x4b0 net/core/net_namespace.c:437 create_new_namespaces+0x4ce/0x930 kernel/nsproxy.c:107 unshare_nsproxy_namespaces+0xc2/0x200 kernel/nsproxy.c:206 ksys_unshare+0x6d7/0xfb0 kernel/fork.c:2550 __do_sys_unshare kernel/fork.c:2618 [inline] __se_sys_unshare kernel/fork.c:2616 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:2616 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458099 Code: 6d 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 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fb608cb5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000458099 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb608cb66d4 R13: 00000000004c6d60 R14: 00000000004dc280 R15: 00000000ffffffff Modules linked in: ---[ end trace 6b466708e7d74eed ]--- RIP: 0010:nf_ct_gre_keymap_flush+0xb9/0x2f0 net/netfilter/nf_conntrack_proto_gre.c:65 Code: 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 0f 85 2b 02 00 00 4c 8b bb f8 16 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 f9 48 c1 e9 03 <80> 3c 01 00 0f 85 fc 01 00 00 4c 3b bd 68 ff ff ff 4d 8b 27 0f 84 RSP: 0018:ffff88809f1af698 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff88808e4045c0 RCX: 0000000000000000 RDX: 1ffffffff146dff2 RSI: 0000000000000004 RDI: ffff88809f1af600 RBP: ffff88809f1af748 R08: 1ffff11013e35ec0 R09: ffffed1013e35ec1 R10: ffffed1013e35ec0 R11: 0000000000000003 R12: dffffc0000000000 R13: ffff88809f1af858 R14: ffff88808e405cb8 R15: 0000000000000000 FS: 00007fb608cb6700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2ff3a000 CR3: 000000006a566000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400