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    SubjectRe: Linux 2.6.20-rc4
    From
    Date
    Linus Torvalds <torvalds@osdl.org> writes:

    > Patrick McHardy (2):
    > [NETFILTER]: New connection tracking is not EXPERIMENTAL anymore

    I get kernel panics when doing large ethernet transfers. A loop doing
    continuous scp transfers of some large (>100MB) files makes the kernel
    crash after a few minutes. scp runs on a different machine and copies
    data from the machine that crashes. (The first crash did not happen
    when scp was used, but scp is an easy way to reproduce the problem.)

    I've seen this crash also with 2.6.20-rc2-git-something. Previously I
    ran these kernels quite a lot and used a ppp link without problems.
    Today I started using eth0 and the crashes started to occur. I have
    netfilter rules for ppp0, but no rules for eth0. Earlier kernels have
    been working perfectly for large eth0 transfers on this machine.

    Hand copied data from the console:

    BUG: unable to handle kernel paging request at virtual address 9f5cea9f
    printing eip:
    c034c729
    *pde = 00000000
    Ooops: 0000 [#1]
    PREEMPT
    Modules linked in: ... 8139too ...
    CPU: 0
    EIP: 0060:[<c034c729>] Not tainted VLI
    EFALLGS: 00010206 (2.6.20-rc4 #13)
    EIP is at ipv4_conntrack_help+0x6b/0x83
    eax: c0475e44 ebx: 9f5cea37 ecx: d1dcebb0 edx: 00000014
    esi: d1dcebb0 edi: c0475e44 ebp: c0475dd8 esp: c0475dc4
    ds: 007b es: 007b ss: 0068
    Process swapper (pid: 0, ti=c0474000 task=c0437500 task.ti=c0474000)
    Stack: 00000001 9f5cea37 c0463a6c c0475e1c c0471a48 c0475dfc c0308269 00000000
    c0318767 00000001 c0475e44 00000001 c0475e44 c0471a48 c0475e2c c03083a8
    df391800 00000000 c0475e1c c0318767 80000000 00000002 c0463a6c df391800
    Call Trace:
    show_trace_log_lvl+0x1a/0x30
    show_stack_log_lvl+0xa5/0xca
    show_registers+0x1e2/0x343
    die+0x10b/0x228
    do_page_fault+0x2b9/0x5f6
    error_code+0x74/0x7c
    nf_iterate+0x59/0x7d
    nf_hook_slow+0x57/0xe1
    ip_local_deliver+0x1a8/0x1ef
    ip_rcv+0x25b/0x4eb
    netif_receive_skb+0x196/0x2cc
    rtl8139_poll+0x309/0x4d7
    net_rx_action+0xac/0x25f
    __do_softirq+0x5c/0xb7
    do_softirq+0x4d/0x50
    irq_exit+0x49/0x4b
    do_IRQ+0x5f/0xb3
    common_interrupt+0x2e/0x34
    cpu_idle+0x41/0x6a
    rest_init+0x37/0x3a
    start_kernel+0x2ba/0x385
    0x0
    =================
    Code: 89 45 f0 85 c0 74 2f 8b 42 20 89 c1 2b 8a 98 00 00 00 0f b6 10
    80 e2 0f 0f b6 d2 8d 14 91 0f b6 c3 89 04 24 89 f1 89 f8 8b 5d f0 <ff>
    53 68 83 c4 08 5b 5e 5f 5d c3 b8 01 00- 00 00 83 c4 08 5b 5e
    EIP: [<c034c729>] ipv4_conntrack_help+0x6b/0x83 SS:ESP 0068:c0475dc4
    <0>Kernel panic - not syncing: Fatal exception in interrupt

    Network related config options (There is also some wireless stuff
    compiled in, but it isn't used):

    CONFIG_INET=y
    CONFIG_IP_FIB_HASH=y
    CONFIG_INET_DIAG=y
    CONFIG_INET_TCP_DIAG=y
    CONFIG_TCP_CONG_CUBIC=y
    CONFIG_DEFAULT_TCP_CONG="cubic"
    CONFIG_NETFILTER=y
    CONFIG_NF_CONNTRACK_ENABLED=y
    CONFIG_NF_CONNTRACK_SUPPORT=y
    CONFIG_NF_CONNTRACK=y
    CONFIG_NF_CONNTRACK_MARK=y
    CONFIG_NF_CONNTRACK_FTP=y
    CONFIG_NF_CONNTRACK_H323=y
    CONFIG_NF_CONNTRACK_IRC=y
    CONFIG_NF_CONNTRACK_NETBIOS_NS=y
    CONFIG_NF_CONNTRACK_SIP=y
    CONFIG_NETFILTER_XTABLES=y
    CONFIG_NETFILTER_XT_TARGET_CLASSIFY=y
    CONFIG_NETFILTER_XT_TARGET_CONNMARK=y
    CONFIG_NETFILTER_XT_TARGET_MARK=y
    CONFIG_NETFILTER_XT_TARGET_NFQUEUE=y
    CONFIG_NETFILTER_XT_MATCH_COMMENT=y
    CONFIG_NETFILTER_XT_MATCH_CONNMARK=y
    CONFIG_NETFILTER_XT_MATCH_CONNTRACK=y
    CONFIG_NETFILTER_XT_MATCH_LENGTH=y
    CONFIG_NETFILTER_XT_MATCH_LIMIT=y
    CONFIG_NETFILTER_XT_MATCH_MAC=y
    CONFIG_NETFILTER_XT_MATCH_MARK=y
    CONFIG_NETFILTER_XT_MATCH_PKTTYPE=y
    CONFIG_NETFILTER_XT_MATCH_REALM=y
    CONFIG_NETFILTER_XT_MATCH_STATE=y
    CONFIG_NETFILTER_XT_MATCH_STATISTIC=y
    CONFIG_NETFILTER_XT_MATCH_TCPMSS=y
    CONFIG_NF_CONNTRACK_IPV4=y
    CONFIG_NF_CONNTRACK_PROC_COMPAT=y
    CONFIG_IP_NF_IPTABLES=y
    CONFIG_IP_NF_MATCH_IPRANGE=y
    CONFIG_IP_NF_MATCH_TOS=y
    CONFIG_IP_NF_MATCH_RECENT=y
    CONFIG_IP_NF_MATCH_ECN=y
    CONFIG_IP_NF_MATCH_TTL=y
    CONFIG_IP_NF_MATCH_OWNER=y
    CONFIG_IP_NF_MATCH_ADDRTYPE=y
    CONFIG_IP_NF_FILTER=y
    CONFIG_IP_NF_TARGET_REJECT=y
    CONFIG_IP_NF_TARGET_LOG=y
    CONFIG_IP_NF_TARGET_TCPMSS=y
    CONFIG_NF_NAT=y
    CONFIG_NF_NAT_NEEDED=y
    CONFIG_IP_NF_TARGET_MASQUERADE=y
    CONFIG_NF_NAT_FTP=y
    CONFIG_NF_NAT_IRC=y
    CONFIG_NF_NAT_H323=y
    CONFIG_NF_NAT_SIP=y
    CONFIG_IP_NF_MANGLE=y
    CONFIG_IP_NF_TARGET_TOS=y
    CONFIG_IP_NF_TARGET_ECN=y
    CONFIG_NET_CLS_ROUTE=y

    --
    Peter Osterlund - petero2@telia.com
    http://web.telia.com/~u89404340
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