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SubjectRe: possible lockdep crash
Date


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@visp.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@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html


--
Denys Fedoryshchenko
Technical Manager
Virtual ISP S.A.L.



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