From mboxrd@z Thu Jan 1 00:00:00 1970 From: nuclearcat@nuclearcat.com Subject: kernel panic, qdisc_dequeue_head, htb, 4.7.0-rc7 Date: Sun, 24 Jul 2016 20:56:26 +0300 Message-ID: <3e85e4ac67d0a104a9585cfca302883e@nuclearcat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit To: Linux Kernel Network Developers Return-path: Received: from nuclearcat.com ([144.76.183.226]:49340 "EHLO nuclearcat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752010AbcGXR4a (ORCPT ); Sun, 24 Jul 2016 13:56:30 -0400 Received: from localhost (localhost [127.0.0.1]) by nuclearcat.com (Postfix) with ESMTP id 2C40A67C002E for ; Sun, 24 Jul 2016 17:56:28 +0000 (UTC) Received: from nuclearcat.com ([127.0.0.1]) by localhost (nuclearcat.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Ryp6ITC6-f0Z for ; Sun, 24 Jul 2016 17:56:26 +0000 (UTC) Received: from germany.nuclearcat.com (localhost [127.0.0.1]) (Authenticated sender: nuclearcat@nuclearcat.com) by nuclearcat.com (Postfix) with ESMTPA id 8E12C67C002C for ; Sun, 24 Jul 2016 17:56:26 +0000 (UTC) Sender: netdev-owner@vger.kernel.org List-ID: Hi, I'm still struggling to find out reason of random reboots on BRAS servers (PPPoE + HTB egress on ppp and policer for ppp ingress). Here is happening at 4.7.0-rc7, it seems panic is happening at peak time, 1-2 times per day now. I noticed also rise of kernel panic on other locations as well, but i'm still setting up netconsole there. Here is panic message: [71623.328457] general protection fault: 0000 [#1] SMP [71623.328658] Modules linked in: cls_fw act_police cls_u32 sch_ingress sch_sfq sch_htb netconsole configfs coretemp nf_nat_pptp nf_nat_proto_gre nf_conntrack_pptp nf_conntrack_proto_gre pppoe pppox ppp_generic slhc tun xt_REDIRECT nf_nat_redirect xt_TCPMSS ipt_REJECT nf_reject_ipv4 xt_set ts_bm xt_string xt_connmark xt_DSCP xt_mark xt_tcpudp ip_set_hash_net ip_set_hash_ip ip_set nfnetlink iptable_mangle iptable_filter iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack ip_tables x_tables 8021q garp mrp stp llc [71623.332554] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.7.0-rc7-build-0107 #2 [71623.332754] Hardware name: HP ProLiant DL320e Gen8 v2, BIOS P80 04/02/2015 [71623.332954] task: ffffffff8200b500 ti: ffffffff82000000 task.ti: ffffffff82000000 [71623.333289] RIP: 0010:[] [] qdisc_dequeue_head+0x5a/0x7b [71623.333685] RSP: 0018:ffff880447403e10 EFLAGS: 00010282 [71623.333882] RAX: ffff880427b67f00 RBX: 00004125c7ec4a6c RCX: 0000000000000001 [71623.334083] RDX: ffa0050402791340 RSI: 0000000000000000 RDI: ffff8804164f2000 [71623.334281] RBP: ffff880447403e10 R08: 0000000000000000 R09: ffff880425471868 [71623.334481] R10: ffffffff820050c0 R11: 0000000000000001 R12: 0000000000000007 [71623.334680] R13: ffff880425471000 R14: 0000000000000000 R15: ffff88040d9ebc00 [71623.334881] FS: 0000000000000000(0000) GS:ffff880447400000(0000) knlGS:0000000000000000 [71623.335216] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [71623.335415] CR2: 00007f184bb2f730 CR3: 0000000002006000 CR4: 00000000001406f0 [71623.335614] Stack: [71623.335808] ffff880447403eb0 ffffffffa01328af 0000000000000578 00000000000001a0 [71623.336369] 000000010440678b ffff880425471140 0000000700000001 ffff880425471860 [71623.336929] ffff880425471868 fffffffe00000000 0000000000000000 ffff88040d9ebc00 [71623.340797] Call Trace: [71623.340987] [71623.341050] [] htb_dequeue+0x33a/0x6fe [sch_htb] [71623.341433] [] __qdisc_run+0x9d/0x17b [71623.341630] [] ? ktime_get+0x4b/0x9a [71623.341827] [] net_tx_action+0xe3/0x148 [71623.342027] [] __do_softirq+0xb9/0x1a9 [71623.342226] [] irq_exit+0x37/0x7c [71623.342425] [] smp_apic_timer_interrupt+0x3d/0x48 [71623.342627] [] apic_timer_interrupt+0x7c/0x90 [71623.342825] [71623.342887] [] ? mwait_idle+0x64/0x7a [71623.343276] [] ? atomic_notifier_call_chain+0x13/0x15 [71623.343476] [] arch_cpu_idle+0xa/0xc [71623.343675] [] default_idle_call+0x27/0x29 [71623.343872] [] cpu_startup_entry+0x115/0x1bf [71623.344072] [] rest_init+0x72/0x74 [71623.344270] [] start_kernel+0x3bc/0x3c9 [71623.344467] [] x86_64_start_reservations+0x2f/0x31 [71623.344668] [] x86_64_start_kernel+0xbb/0xbe [71623.344867] Code: 00 48 c7 40 08 00 00 00 00 48 89 51 08 48 89 0a 8b 50 28 b9 01 00 00 00 29 97 c4 00 00 00 8b 90 c0 00 00 00 48 03 90 c8 00 00 00 83 7a 02 00 74 04 0f b7 4a 04 8b 50 28 01 8f b8 00 00 00 48 [71623.349025] RIP [] qdisc_dequeue_head+0x5a/0x7b [71623.349281] RSP [71623.349500] ---[ end trace 0fb7352fcf43439e ]--- [71623.355886] Kernel panic - not syncing: Fatal exception in interrupt [71623.356093] Kernel Offset: disabled [71623.359937] ERST: [Firmware Warn]: Firmware does not respond in time. [71623.388538] Rebooting in 5 seconds.