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Date:	Mon, 22 Dec 2014 18:34:40 +0800
From:	zhuyj <zyjzyj2000@...il.com>
To:	Mike Galbraith <bitbucket@...ine.de>, astx <astx@...-it.at>
CC:	linux-kernel@...r.kernel.org, netdev <netdev@...r.kernel.org>,
	zyjzyj2000@...il.com
Subject: Re: OOPS in nf_ct_unlink_expect_report using Polycom RealPresence
 Mobile

Please check the number of iptables rule. Maybe it results from the big 
number of iptables rules.

Best Regards!
Zhu Yanjun

On 01/31/2014 09:17 PM, Mike Galbraith wrote:
> (CC netdev)
>
> On Fri, 2014-01-31 at 12:05 +0100, astx wrote:
>> Using Polycom video conferencing software my homebrew linux NAT router
>> crashes with attached kernel oops message.
>> This error can be reproduced also using kernel 3.2.54. Kernel 2.6.35
>> seems to be stable.
>>
>> Disabling nf_nat_h323 and nf_conntrack_h323 avoids crash - but video
>> conferencing software is no more usable.
>>
>>
>> ===================================================================================
>>    BUG: unable to handle kernel paging request at 00100104
>> IP: [<f8214f07>] nf_ct_unlink_expect_report+0x57/0xf0 [nf_conntrack]
>> *pdpt = 00000000359aa001 *pde = 0000000000000000
>> Oops: 0002 [#1] SMP
>> Modules linked in: nf_conntrack_netlink nfnetlink xt_mac xt_TCPMSS
>> ipt_MASQUERADE
>>    xt_pkttype xt_multiport xt_REDIRECT xt_nat iptable_mangle xt_LOG
>> xt_limit af_packet
>>    act_mirred cls_u32 sch_ingress sch_hfsc ifb xt_tcpudp ip6t_REJECT ipt_REJECT
>>    ip6table_raw iptable_raw xt_CT iptable_filter nf_nat_pptp nf_nat_proto_gre
>>    nf_conntrack_proto_udplite nf_conntrack_proto_dccp ip6table_mangle
>> iptable_nat
>>    nf_nat_ipv4 nf_nat_sip nf_nat_irc nf_nat_snmp_basic nf_conntrack_snmp
>>    nf_conntrack_broadcast nf_nat_h323 nf_nat_tftp nf_nat_ftp nf_nat
>> nf_conntrack_h323
>>    nf_conntrack_tftp nf_conntrack_proto_sctp nf_conntrack_sip nf_conntrack_irc
>>    nf_conntrack_pptp nf_conntrack_proto_gre nf_conntrack_ftp nf_conntrack_ipv4
>>    nf_defrag_ipv4 ip_tables xt_conntrack nf_conntrack ip6table_filter ip6_tables
>>    x_tables padlock_sha padlock_aes e_powersaver freq_table mperf via_cputemp
>>    hwmon_vid serio_raw pcspkr i2c_viapro ehci_pci fan thermal processor 8139too
>>    sg thermal_sys button shpchp 8139cp pci_hotplug mii via_agp ext4 crc16 jbd2
>>    pata_via sata_via libata sd_mod scsi_mod ohci_hcd uhci_hcd ehci_hcd
>> CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.10.28-9500-smp_m #1
>> Hardware name:    /CN700-8237, BIOS 6.00 PG 08/30/2007
>> task: c07ce180 ti: f6408000 task.ti: c07c2000
>> EIP: 0060:[<f8214f07>] EFLAGS: 00210206 CPU: 0
>> EIP is at nf_ct_unlink_expect_report+0x57/0xf0 [nf_conntrack]
>> EAX: 00100100 EBX: eb636bc0 ECX: 00000000 EDX: eb461540
>> ESI: c0804e00 EDI: eb461544 EBP: f6409f08 ESP: f6409eec
>>    DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
>> CR0: 8005003b CR2: 00100104 CR3: 359d4000 CR4: 000006b0
>> DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
>> DR6: ffff0ff0 DR7: 00000400
>> Stack:
>>    00000000 00200286 f6409f08 c0244bd8 eb636bc0 00100100 00000000 f6409f18
>>    f8215687 f598ede8 c0804e00 f6409f28 f8211c99 f598ede8 f598ee50 f6409f5c
>>    f8212e5e 00000003 00000000 00000000 00000004 eb461514 f598ede8 00000000
>> Call Trace:
>>    [<c0244bd8>] ? del_timer+0x48/0x70
>>    [<f8215687>] nf_ct_remove_expectations+0x47/0x60 [nf_conntrack]
>>    [<f8211c99>] nf_ct_delete_from_lists+0x59/0x90 [nf_conntrack]
>>    [<f8212e5e>] death_by_timeout+0x14e/0x1c0 [nf_conntrack]
>>    [<f8212d10>] ? nf_conntrack_set_hashsize+0x190/0x190 [nf_conntrack]
>>    [<c024442d>] call_timer_fn+0x1d/0x80
>>    [<c024461e>] run_timer_softirq+0x18e/0x1a0
>>    [<f8212d10>] ? nf_conntrack_set_hashsize+0x190/0x190 [nf_conntrack]
>>    [<c023e6f3>] __do_softirq+0xa3/0x170
>>    [<c023e650>] ? __local_bh_enable+0x70/0x70
>>    <IRQ>
>>    [<c023e587>] ? irq_exit+0x67/0xa0
>>    [<c0202af6>] ? do_IRQ+0x46/0xb0
>>    [<c027ad05>] ? clockevents_notify+0x35/0x110
>>    [<c066ac6c>] ? common_interrupt+0x2c/0x40
>>    [<c056e3c1>] ? cpuidle_enter_state+0x41/0xf0
>>    [<c056e6fb>] ? cpuidle_idle_call+0x8b/0x100
>>    [<c02085f8>] ? arch_cpu_idle+0x8/0x30
>>    [<c027314b>] ? cpu_idle_loop+0x4b/0x140
>>    [<c0273258>] ? cpu_startup_entry+0x18/0x20
>>    [<c066056d>] ? rest_init+0x5d/0x70
>>    [<c0813ac8>] ? start_kernel+0x2ec/0x2f2
>>    [<c081364f>] ? repair_env_string+0x5b/0x5b
>>    [<c0813269>] ? i386_start_kernel+0x33/0x35
>> Code: 8b 7b 0c 8b b6 98 00 00 00 85 c0 89 07 74 03 89 78 04 c7 43 0c 00
>>    02 20 00 83 ae ec 05 00 00 01 8b 03 8b 7b 04 85 c0 89 07 74 03 <89> 78
>>    04 8b 43 7c c7 03 00 01 10 00 c7 43 04 00 02 20 00 80 6c
>> EIP: [<f8214f07>] nf_ct_unlink_expect_report+0x57/0xf0 [nf_conntrack]
>> SS:ESP 0068:f6409eec
>> CR2: 0000000000100104
>> ---[ end trace 79fe2e6b81f54dee ]---
>> Kernel panic - not syncing: Fatal exception in interrupt
>> Rebooting in 300 seconds..
>> ===================================================================================
>>
>>
>> Polycom Version: 3.1-44477
>> running on device: Apple iPad Mini
>> using operating system: iOS Version: 7.0.4
>>
>>
>> Attached also my kernel config. Hopefully someone could help...
>>
>> BR, Toni
>
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