IPVS: ftp: loaded support on port[0] = 21 NET: Registered protocol family 30 list_add double add: new=ffffffff892e7630, prev=ffffffff890f3140, next=ffffffff892e7630. Failed to register TIPC socket type ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:29! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 8471 Comm: syz-executor.2 Not tainted 4.19.47 #19 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__list_add_valid.cold+0x26/0x3c lib/list_debug.c:29 Code: 56 ff ff ff 4c 89 e1 48 c7 c7 a0 ae 81 87 e8 d0 f3 30 fe 0f 0b 48 89 f2 4c 89 e1 4c 89 ee 48 c7 c7 e0 af 81 87 e8 b9 f3 30 fe <0f> 0b 48 89 f1 48 c7 c7 60 af 81 87 4c 89 e6 e8 a5 f3 30 fe 0f 0b RSP: 0018:ffff88806b33fb88 EFLAGS: 00010282 RAX: 0000000000000058 RBX: ffffffff892e74a0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff81559f66 RDI: ffffed100d667f63 RBP: ffff88806b33fba0 R08: 0000000000000058 R09: ffffed1015d24fe9 R10: ffffed1015d24fe8 R11: ffff8880ae927f47 R12: ffffffff892e7630 R13: ffffffff892e7630 R14: ffffffff892e7630 R15: ffffffff892e75d0 FS: 0000000002073940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000075c048 CR3: 000000006b56c000 CR4: 00000000001406e0 Call Trace: __list_add include/linux/list.h:60 [inline] list_add include/linux/list.h:79 [inline] proto_register+0x459/0x8e0 net/core/sock.c:3299 tipc_socket_init+0x1c/0x70 net/tipc/socket.c:3157 tipc_init_net+0x2ed/0x570 net/tipc/core.c:69 ops_init+0xb3/0x410 net/core/net_namespace.c:129 setup_net+0x2d3/0x740 net/core/net_namespace.c:315 copy_net_ns+0x1df/0x340 net/core/net_namespace.c:438 create_new_namespaces+0x400/0x7b0 kernel/nsproxy.c:107 unshare_nsproxy_namespaces+0xc2/0x200 kernel/nsproxy.c:206 ksys_unshare+0x440/0x980 kernel/fork.c:2525 __do_sys_unshare kernel/fork.c:2593 [inline] __se_sys_unshare kernel/fork.c:2591 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:2591 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45bd47 Code: 00 00 00 b8 63 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 1d 8d fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 fd 8c fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffece788ab8 EFLAGS: 00000202 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 000000000075c9a8 RCX: 000000000045bd47 RDX: 0000000000000000 RSI: 00007ffece788a60 RDI: 0000000040000000 RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000005 R10: 0000000000000000 R11: 0000000000000202 R12: 000000000075c9a8 R13: 00007ffece788d28 R14: 0000000000000000 R15: 0000000000000000 IPVS: ftp: loaded support on port[0] = 21 Modules linked in: ---[ end trace 2c3442099d116611 ]--- RIP: 0010:__list_add_valid.cold+0x26/0x3c lib/list_debug.c:29 Code: 56 ff ff ff 4c 89 e1 48 c7 c7 a0 ae 81 87 e8 d0 f3 30 fe 0f 0b 48 89 f2 4c 89 e1 4c 89 ee 48 c7 c7 e0 af 81 87 e8 b9 f3 30 fe <0f> 0b 48 89 f1 48 c7 c7 60 af 81 87 4c 89 e6 e8 a5 f3 30 fe 0f 0b RSP: 0018:ffff88806b33fb88 EFLAGS: 00010282 RAX: 0000000000000058 RBX: ffffffff892e74a0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff81559f66 RDI: ffffed100d667f63 RBP: ffff88806b33fba0 R08: 0000000000000058 R09: ffffed1015d24fe9 R10: ffffed1015d24fe8 R11: ffff8880ae927f47 R12: ffffffff892e7630 IPVS: ftp: loaded support on port[0] = 21 R13: ffffffff892e7630 R14: ffffffff892e7630 R15: ffffffff892e75d0 FS: 0000000002073940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000075c048 CR3: 000000006b56c000 CR4: 00000000001406e0