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Date: Sat, 22 Mar 2008 02:46:32 +0200 From: "Denys Fedoryshchenko" <denys@...p.net.lb> To: David Miller <davem@...emloft.net> Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: possible lockdep crash Here is panic without lockdep. Note - i am using FIB_TRIE. Mar 22 02:42:23 205.177.186.74 [ 6.891998] BUG: unable to handle kernel Mar 22 02:42:23 205.177.186.74 NULL pointer dereference Mar 22 02:42:23 205.177.186.74 at 0000009f Mar 22 02:42:23 205.177.186.74 [ 6.892094] IP: Mar 22 02:42:23 205.177.186.74 [<c0276f0a>] ip_route_input+0x872/0xbd9 Mar 22 02:42:23 205.177.186.74 [ 6.892166] Oops: 0002 [#1] Mar 22 02:42:23 205.177.186.74 SMP Mar 22 02:42:23 205.177.186.74 Mar 22 02:42:23 205.177.186.74 [ 6.892258] Modules linked in: Mar 22 02:42:23 205.177.186.74 netconsole Mar 22 02:42:23 205.177.186.74 configfs Mar 22 02:42:23 205.177.186.74 hangcheck_timer Mar 22 02:42:23 205.177.186.74 xt_tcpudp Mar 22 02:42:23 205.177.186.74 ipt_TTL Mar 22 02:42:23 205.177.186.74 ipt_ttl Mar 22 02:42:23 205.177.186.74 xt_NOTRACK Mar 22 02:42:23 205.177.186.74 iptable_raw Mar 22 02:42:23 205.177.186.74 iptable_mangle Mar 22 02:42:23 205.177.186.74 ifb Mar 22 02:42:23 205.177.186.74 e1000e Mar 22 02:42:23 205.177.186.74 em_nbyte Mar 22 02:42:23 205.177.186.74 cls_tcindex Mar 22 02:42:23 205.177.186.74 act_gact Mar 22 02:42:23 205.177.186.74 cls_rsvp Mar 22 02:42:23 205.177.186.74 sch_htb Mar 22 02:42:23 205.177.186.74 cls_fw Mar 22 02:42:23 205.177.186.74 act_mirred Mar 22 02:42:23 205.177.186.74 em_u32 Mar 22 02:42:23 205.177.186.74 sch_red Mar 22 02:42:23 205.177.186.74 sch_sfq Mar 22 02:42:23 205.177.186.74 sch_tbf Mar 22 02:42:23 205.177.186.74 sch_teql Mar 22 02:42:23 205.177.186.74 cls_basic Mar 22 02:42:23 205.177.186.74 act_police Mar 22 02:42:23 205.177.186.74 sch_gred Mar 22 02:42:23 205.177.186.74 act_pedit Mar 22 02:42:23 205.177.186.74 sch_hfsc Mar 22 02:42:23 205.177.186.74 cls_rsvp6 Mar 22 02:42:23 205.177.186.74 sch_ingress Mar 22 02:42:23 205.177.186.74 em_meta Mar 22 02:42:23 205.177.186.74 em_text Mar 22 02:42:23 205.177.186.74 act_ipt Mar 22 02:42:23 205.177.186.74 sch_dsmark Mar 22 02:42:23 205.177.186.74 sch_prio Mar 22 02:42:23 205.177.186.74 sch_netem Mar 22 02:42:23 205.177.186.74 act_simple Mar 22 02:42:23 205.177.186.74 cls_u32 Mar 22 02:42:23 205.177.186.74 em_cmp Mar 22 02:42:23 205.177.186.74 sch_cbq Mar 22 02:42:23 205.177.186.74 cls_route Mar 22 02:42:23 205.177.186.74 xt_TCPMSS Mar 22 02:42:23 205.177.186.74 iptable_nat Mar 22 02:42:23 205.177.186.74 nf_conntrack_ipv4 Mar 22 02:42:23 205.177.186.74 ipt_LOG Mar 22 02:42:23 205.177.186.74 ipt_MASQUERADE Mar 22 02:42:23 205.177.186.74 ipt_REDIRECT Mar 22 02:42:23 205.177.186.74 nf_nat Mar 22 02:42:23 205.177.186.74 nf_conntrack Mar 22 02:42:23 205.177.186.74 nfnetlink Mar 22 02:42:23 205.177.186.74 iptable_filter Mar 22 02:42:23 205.177.186.74 ip_tables Mar 22 02:42:23 205.177.186.74 x_tables Mar 22 02:42:23 205.177.186.74 8021q Mar 22 02:42:23 205.177.186.74 tun Mar 22 02:42:23 205.177.186.74 tulip Mar 22 02:42:23 205.177.186.74 r8169 Mar 22 02:42:23 205.177.186.74 sky2 Mar 22 02:42:23 205.177.186.74 via_velocity Mar 22 02:42:23 205.177.186.74 via_rhine Mar 22 02:42:23 205.177.186.74 sis900 Mar 22 02:42:23 205.177.186.74 ne2k_pci Mar 22 02:42:23 205.177.186.74 8390 Mar 22 02:42:23 205.177.186.74 skge Mar 22 02:42:23 205.177.186.74 tg3 Mar 22 02:42:23 205.177.186.74 8139too Mar 22 02:42:23 205.177.186.74 e1000 Mar 22 02:42:23 205.177.186.74 e100 Mar 22 02:42:23 205.177.186.74 usb_storage Mar 22 02:42:23 205.177.186.74 mtdblock Mar 22 02:42:23 205.177.186.74 mtd_blkdevs Mar 22 02:42:23 205.177.186.74 usbhid Mar 22 02:42:23 205.177.186.74 uhci_hcd Mar 22 02:42:23 205.177.186.74 ehci_hcd Mar 22 02:42:23 205.177.186.74 ohci_hcd Mar 22 02:42:23 205.177.186.74 usbcore Mar 22 02:42:23 205.177.186.74 Mar 22 02:42:23 205.177.186.74 [ 6.892973] Mar 22 02:42:23 205.177.186.74 [ 6.892973] Pid: 1880, comm: modprobe Not tainted (2.6.25-rc6-git2-build-0024 #10) Mar 22 02:42:23 205.177.186.74 [ 6.892973] EIP: 0060:[<c0276f0a>] EFLAGS: 00010206 CPU: 1 Mar 22 02:42:23 205.177.186.74 [ 6.892973] EIP is at ip_route_input+0x872/ 0xbd9 Mar 22 02:42:23 205.177.186.74 [ 6.892973] EAX: c0927100 EBX: 000000c0 ECX: c092ee08 EDX: 00000087 Mar 22 02:42:23 205.177.186.74 [ 6.892973] ESI: ffffff8f EDI: c092ee98 EBP: c092eec4 ESP: c092ee28 Mar 22 02:42:23 205.177.186.74 [ 6.892973] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 Mar 22 02:42:23 205.177.186.74 [ 6.892973] Process modprobe (pid: 1880, ti=c092e000 task=f711d050 task.ti=f77fa000) Mar 22 02:42:23 205.177.186.74 Mar 22 02:42:23 205.177.186.74 [ 6.892973] Stack: Mar 22 02:42:23 205.177.186.74 c092ee5c Mar 22 02:42:23 205.177.186.74 201ea8c0 Mar 22 02:42:23 205.177.186.74 201ea8c0 Mar 22 02:42:23 205.177.186.74 f7fecc00 Mar 22 02:42:23 205.177.186.74 00000286 Mar 22 02:42:23 205.177.186.74 c092ee60 Mar 22 02:42:23 205.177.186.74 f88d2d1e Mar 22 02:42:23 205.177.186.74 f88d219b Mar 22 02:42:23 205.177.186.74 Mar 22 02:42:23 205.177.186.74 [ 6.892973] Mar 22 02:42:23 205.177.186.74 00000001 Mar 22 02:42:23 205.177.186.74 00000286 Mar 22 02:42:23 205.177.186.74 f7f50d00 Mar 22 02:42:23 205.177.186.74 c096d800 Mar 22 02:42:23 205.177.186.74 00422000 Mar 22 02:42:23 205.177.186.74 00000000 Mar 22 02:42:23 205.177.186.74 00000004 Mar 22 02:42:23 205.177.186.74 00000000 Mar 22 02:42:23 205.177.186.74 Mar 22 02:42:23 205.177.186.74 [ 6.892973] Mar 22 02:42:23 205.177.186.74 201ea8c0 Mar 22 02:42:23 205.177.186.74 201ea8c0 Mar 22 02:42:23 205.177.186.74 00000000 Mar 22 02:42:23 205.177.186.74 00000000 Mar 22 02:42:23 205.177.186.74 00000000 Mar 22 02:42:23 205.177.186.74 00000000 Mar 22 02:42:23 205.177.186.74 00000000 Mar 22 02:42:23 205.177.186.74 00000000 Mar 22 02:42:23 205.177.186.74 Mar 22 02:42:23 205.177.186.74 [ 6.892973] Call Trace: Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<f88d2d1e>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 e100_exec_cb+0xef/0xfa [e100] Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<f88d219b>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 e100_xmit_prepare+0x0/0x7c [e100] Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<c0295233>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 arp_process+0x1a5/0x508 Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<c01554ec>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 add_partial+0x11/0x44 Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<c0155fec>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 __slab_free+0x54/0x201 Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<c01554ec>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 add_partial+0x11/0x44 Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<c0155fec>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 __slab_free+0x54/0x201 Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<c029567b>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 arp_rcv+0xe5/0xf8 Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<c025ecf2>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 netif_receive_skb+0x33e/0x3a9 Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<f88d3a3e>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 e100_poll+0x17e/0x2de [e100] Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<c01315b3>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 run_hrtimer_pending+0xd/0x84 Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<c0260bcb>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 net_rx_action+0x8f/0x191 Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<c0123f8b>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 __do_softirq+0x64/0xcd Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<c0105f0a>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 do_softirq+0x55/0x89 Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<c013f39a>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 handle_fasteoi_irq+0x0/0xaa Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<c0123ef4>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 irq_exit+0x38/0x6b Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<c0105ff8>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 do_IRQ+0xba/0xd2 Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<c0104287>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 common_interrupt+0x23/0x28 Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<c01e6456>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 vsnprintf+0x29c/0x40c Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<c016e5ab>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 seq_printf+0x2b/0x4b Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<c0139d05>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 m_show+0x2a/0x11f Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<c016eb52>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 seq_read+0x18b/0x261 Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<c016e9c7>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 seq_read+0x0/0x261 Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<c01822d0>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 proc_reg_read+0x56/0x6a Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<c018227a>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 proc_reg_read+0x0/0x6a Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<c0159e9d>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 vfs_read+0x86/0xf6 Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<c015a2a2>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 sys_read+0x3b/0x60 Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<c0103876>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 sysenter_past_esp+0x5f/0x85 Mar 22 02:42:23 205.177.186.74 [ 6.892973] [<c02a0000>] Mar 22 02:42:23 205.177.186.74 ? Mar 22 02:42:23 205.177.186.74 fib_hash_table+0x58/0x7b Mar 22 02:42:23 205.177.186.74 [ 6.892973] ======================= Mar 22 02:42:23 205.177.186.74 [ 6.892973] Code: Mar 22 02:42:23 205.177.186.74 84 Mar 22 02:42:23 205.177.186.74 01 Mar 22 02:42:23 205.177.186.74 00 Mar 22 02:42:23 205.177.186.74 00 Mar 22 02:42:23 205.177.186.74 00 Mar 22 02:42:23 205.177.186.74 8b Mar 22 02:42:23 205.177.186.74 55 Mar 22 02:42:23 205.177.186.74 8c Mar 22 02:42:23 205.177.186.74 f0 Mar 22 02:42:23 205.177.186.74 ff Mar 22 02:42:23 205.177.186.74 4a Mar 22 02:42:23 205.177.186.74 04 Mar 22 02:42:23 205.177.186.74 0f Mar 22 02:42:23 205.177.186.74 94 Mar 22 02:42:23 205.177.186.74 c0 Mar 22 02:42:23 205.177.186.74 84 Mar 22 02:42:23 205.177.186.74 c0 Mar 22 02:42:23 205.177.186.74 74 Mar 22 02:42:23 205.177.186.74 07 Mar 22 02:42:23 205.177.186.74 89 Mar 22 02:42:23 205.177.186.74 d0 Mar 22 02:42:23 205.177.186.74 e8 Mar 22 02:42:23 205.177.186.74 d9 Mar 22 02:42:23 205.177.186.74 f8 Mar 22 02:42:23 205.177.186.74 01 Mar 22 02:42:23 205.177.186.74 00 Mar 22 02:42:23 205.177.186.74 83 Mar 22 02:42:23 205.177.186.74 7d Mar 22 02:42:23 205.177.186.74 84 Mar 22 02:42:23 205.177.186.74 00 Mar 22 02:42:23 205.177.186.74 0f Mar 22 02:42:23 205.177.186.74 84 Mar 22 02:42:23 205.177.186.74 64 Mar 22 02:42:23 205.177.186.74 03 Mar 22 02:42:23 205.177.186.74 00 Mar 22 02:42:23 205.177.186.74 00 Mar 22 02:42:23 205.177.186.74 8b Mar 22 02:42:23 205.177.186.74 55 Mar 22 02:42:23 205.177.186.74 d8 Mar 22 02:42:23 205.177.186.74 85 Mar 22 02:42:23 205.177.186.74 d2 Mar 22 02:42:23 205.177.186.74 74 Mar 22 02:42:23 205.177.186.74 12 Mar 22 02:42:23 205.177.186.74 unparseable log message: "<f0> " Mar 22 02:42:23 205.177.186.74 ff Mar 22 02:42:23 205.177.186.74 4a Mar 22 02:42:23 205.177.186.74 18 Mar 22 02:42:23 205.177.186.74 0f Mar 22 02:42:23 205.177.186.74 94 Mar 22 02:42:23 205.177.186.74 c0 Mar 22 02:42:23 205.177.186.74 84 Mar 22 02:42:23 205.177.186.74 c0 Mar 22 02:42:23 205.177.186.74 74 Mar 22 02:42:23 205.177.186.74 07 Mar 22 02:42:23 205.177.186.74 89 Mar 22 02:42:23 205.177.186.74 d0 Mar 22 02:42:23 205.177.186.74 e8 Mar 22 02:42:23 205.177.186.74 b9 Mar 22 02:42:23 205.177.186.74 6c Mar 22 02:42:23 205.177.186.74 02 Mar 22 02:42:23 205.177.186.74 00 Mar 22 02:42:23 205.177.186.74 8b Mar 22 02:42:23 205.177.186.74 55 Mar 22 02:42:23 205.177.186.74 dc Mar 22 02:42:23 205.177.186.74 Mar 22 02:42:23 205.177.186.74 [ 6.892973] EIP: [<c0276f0a>] Mar 22 02:42:23 205.177.186.74 ip_route_input+0x872/0xbd9 Mar 22 02:42:23 205.177.186.74 SS:ESP 0068:c092ee28 Mar 22 02:42:23 205.177.186.74 [ 6.892974] Kernel panic - not syncing: Fatal exception in interrupt Mar 22 02:42:23 205.177.186.74 [ 6.893021] Rebooting in 10 seconds.. On Fri, 21 Mar 2008 04:04:08 -0700 (PDT), David Miller wrote > From: "Denys Fedoryshchenko" <denys@...p.net.lb> > Date: Fri, 21 Mar 2008 12:54:50 +0200 > > > Let me know if i can improve output to help debugging. > > If possible it must be minimal risk to hang, cause router is in very > > difficult to reach area. > > Can you disable lockdep and see if the problem persists? > > It's killing your routing performance anyways, I have no > idea why you have it enabled. > -- > To unsubscribe from this list: send the line "unsubscribe netdev" in > the body of a message to majordomo@...r.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Denys Fedoryshchenko Technical Manager Virtual ISP S.A.L. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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