Hi All, My server had a locking problem with the logs located below. I can not reproduce this erroneous situation again but I think that there is an active vulnerability at my server because of this error. My server's kernel version is v4.6.4. What can be the cause of this error or do you have any opinion about how can I reproduce this logs again? Thanks for your helps. Best regards, Tugrul Feb 5 13:20:42 serv kernel: [<ffffffff81182ad7>] queued_spin_lock_slowpath+0xb/0xf Feb 5 13:20:42 serv kernel: [<ffffffff816ab7bb>] _raw_spin_lock_bh+0x2b/0x30 Feb 5 13:20:42 serv kernel: [<ffffffffa0312864>] connlimit_mt+0x114/0x30 [xt_connlimit] Feb 5 13:20:42 serv kernel: [<ffffffffa0284fe7>] ? hashlimit_mt+0x2b7/0x71 [xt_hashlimit] Feb 5 13:20:42 serv kernel: [<ffffffff816ab59e>] ? _raw_spin_unlock_bh+0x1e/0x20 Feb 5 13:20:42 serv kernel: [<ffffffffa0097c3f>] ipt_do_table+0x25f/0x710 [ipt_tables] Feb 5 13:20:42 serv kernel: [<ffffffffa0097d12>] ? ipt_do_table+0x332/0x710 [ipt_tables] Feb 5 13:20:42 serv kernel: [<ffffffff815d092d>] ? tcp_packet+0x39d/0x9a0 Feb 5 13:20:42 serv kernel: [<ffffffffa0097d12>] ? dev_hard_start_xmit+0x22f/0x3e0 Feb 5 13:20:42 serv kernel: [<ffffffff81590dbf>] iptable_mangle_hook+0x37/0x110 [iptable_mangle] Feb 5 13:20:42 serv kernel: [<ffffffffa030d077>] nf_iterate+0x5d/0x70 Feb 5 13:20:42 serv kernel: [<ffffffff815c678d>] nf_hook_slow+0x5d/0x70 Feb 5 13:20:42 serv kernel: [<ffffffff815c6816>] ip_output+0xdb/0xf0 Feb 5 13:20:42 serv kernel: [<ffffffff815e09cb>] ? __ip_local_out+0xa2/0x110 Feb 5 13:20:42 serv kernel: [<ffffffff815e0002>] ? ip_fragment.constprop.51+0x80/0x80 Feb 5 13:20:42 serv kernel: [<ffffffff815df330>] ip_local_out+0x35/0x40 Feb 5 13:20:42 serv kernel: [<ffffffffa036318a>] synproxy_send_tcp.isra.8+0xca/0xf0 [ipt_SYNPROXY] Feb 5 13:20:42 serv kernel: [<ffffffffa03633b0>] synproxy_recv_client_ack+0x200/0x340 [ipt_SYNPROXY] Feb 5 13:20:42 serv kernel: [<ffffffffa0363b1c>] synproxy_tg4+0x11c/0x308 [ipt_SYNPROXY] -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
