From: Robert Fitzsimons <robfitz@273k.net>
To: Alexey Dobriyan <adobriyan@gmail.com>
Cc: FD Cami <francois.cami@free.fr>,
Alessandro Suardi <alessandro.suardi@gmail.com>,
charles gagalac <charles.gagalac@gmail.com>,
daryll q <daryll_26m@yahoo.com.ph>,
linux-kernel@vger.kernel.org
Subject: Re: Hang in 2.6.23-rc5
Date: Mon, 3 Sep 2007 22:04:56 +0100 [thread overview]
Message-ID: <20070903210440.GA2640@localhost> (raw)
In-Reply-To: <20070902214631.GA1892@martell.zuzino.mipt.ru>
Here is a relevant oops for this hang.
[ 7329.832382] BUG: unable to handle kernel NULL pointer dereference at virtual address 00000025
[ 7329.934755] printing eip:
[ 7329.967145] 802cb921
[ 7329.993347] *pde = 00000000
[ 7330.026799] Oops: 0000 [#1]
[ 7330.060246] Modules linked in: usblp ipt_MASQUERADE iptable_nat nf_nat ipt_LOG xt_limit xt_tcpudp nf_conntrack_ipv4 xt_state nf_conntrack iptable_filter ip_tables x_tables pppoe pppox ppp_generic slhc dvb_pll cx22702 usbhid tuner hid cx88_dvb video_buf_dvb dvb_core cx8800 cx8802 cx88_alsa cx88xx ir_common i2c_algo_bit tveeprom i2c_core videodev compat_ioctl32 v4l2_common v4l1_compat video_buf ehci_hcd uhci_hcd btcx_risc usbcore
[ 7330.518076] CPU: 0
[ 7330.518077] EIP: 0060:[<802cb921>] Not tainted VLI
[ 7330.518079] EFLAGS: 00210246 (2.6.23-rc5-dirty #72)
[ 7330.669129] EIP is at tcp_rto_min+0xb/0x16
[ 7330.718088] eax: 00000032 ebx: d76b5ab0 ecx: 0000209d edx: 00000000
[ 7330.799277] esi: d76b5ab0 edi: 00000000 ebp: 803ecdd8 esp: 803ecdd8
[ 7330.880468] ds: 007b es: 007b fs: 0000 gs: 0033 ss: 0068
[ 7330.950225] Process firefox-bin (pid: 2625, ti=803ec000 task=d1bfcaa0 task.ti=d1bfd000)
[ 7331.043890] Stack: 803ecde8 802cb9e8 d76b5ab0 d76b5ab0 803ecdf4 802cc1e2 803bc3e0 803ece6c
[ 7331.144727] 802cd85f 03ccf75e 208b3367 291abfc5 6eaa5ef6 d6c52818 00000000 00000000
[ 7331.245564] 00000001 03ccf6f4 eddd6e3e 03ccf75e 00000001 00000001 803eceac 03ccf75e
[ 7331.346403] Call Trace:
[ 7331.377800] [<80102abd>] show_trace_log_lvl+0x1a/0x2f
[ 7331.439343] [<80102b6d>] show_stack_log_lvl+0x9b/0xa3
[ 7331.500885] [<80102d1f>] show_registers+0x1aa/0x278
[ 7331.560349] [<80102ed5>] die+0xe8/0x205
[ 7331.607336] [<802f0bea>] do_page_fault+0x469/0x53a
[ 7331.665761] [<802ef73a>] error_code+0x6a/0x70
[ 7331.718987] [<802cb9e8>] tcp_rtt_estimator+0xbc/0x102
[ 7331.780529] [<802cc1e2>] tcp_ack_saw_tstamp+0x17/0x47
[ 7331.842071] [<802cd85f>] tcp_ack+0x6a5/0x1731
[ 7331.895298] [<802d11be>] tcp_rcv_established+0x353/0x5f5
[ 7331.959959] [<802d6358>] tcp_v4_do_rcv+0x2f/0x2fa
[ 7332.017344] [<802d8413>] tcp_v4_rcv+0x6d1/0x71a
[ 7332.072650] [<802c0919>] ip_local_deliver+0x12d/0x17c
[ 7332.134193] [<802c07c0>] ip_rcv+0x40b/0x437
[ 7332.185339] [<802ac6b0>] netif_receive_skb+0x161/0x1ac
[ 7332.247921] [<802ae63a>] process_backlog+0x71/0xda
[ 7332.306345] [<802ae6f9>] net_rx_action+0x56/0xd5
[ 7332.362690] [<80114514>] __do_softirq+0x38/0x7a
[ 7332.417995] [<801039cd>] do_softirq+0x41/0x91
[ 7332.471223] =======================
[ 7332.513947] Code: e4 8b 82 54 03 00 00 89 82 f8 04 00 00 a1 30 e7 39 80 89 82 fc 04 00 00 83 c4 10 5b 5e 5f c9 c3 55 8b 50 64 b8 32 00 00 00 89 e5 <f6> 42 25 20 74 03 8b 42 54 c9 c3 55 85 d2 b9 01 00 00 00 0f 45
[ 7332.746397] EIP: [<802cb921>] tcp_rto_min+0xb/0x16 SS:ESP 0068:803ecdd8
[ 7332.825845] Kernel panic - not syncing: Fatal exception in interrupt
> Try this from net-2.6 tree:
>
> --- a/net/ipv4/tcp_input.c
> +++ b/net/ipv4/tcp_input.c
> @@ -560,7 +560,7 @@ static u32 tcp_rto_min(struct sock *sk)
> struct dst_entry *dst = __sk_dst_get(sk);
> u32 rto_min = TCP_RTO_MIN;
>
> - if (dst_metric_locked(dst, RTAX_RTO_MIN))
> + if (dst && dst_metric_locked(dst, RTAX_RTO_MIN))
> rto_min = dst->metrics[RTAX_RTO_MIN-1];
> return rto_min;
> }
Looks like this is the fix. I'm recompiling with it now.
Robert
next prev parent reply other threads:[~2007-09-03 21:39 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-02 18:42 Hang in 2.6.23-rc5 daryll q
2007-09-02 19:05 ` charles gagalac
2007-09-02 20:38 ` Alessandro Suardi
2007-09-02 21:26 ` Satyam Sharma
2007-09-02 21:29 ` FD Cami
2007-09-02 21:46 ` Alexey Dobriyan
2007-09-02 22:45 ` Satyam Sharma
2007-09-02 23:10 ` Alessandro Suardi
2007-09-03 6:39 ` Patrick Mau
2007-09-04 9:32 ` Romano Giannetti
2007-09-05 17:11 ` Jean Delvare
2007-09-05 22:02 ` Satyam Sharma
2007-09-08 9:37 ` FD Cami
2007-09-03 21:04 ` Robert Fitzsimons [this message]
2007-09-02 22:05 ` Richard Mittendorfer
2007-09-02 22:14 ` Jesper Juhl
-- strict thread matches above, loose matches on Subject: below --
2007-09-02 20:21 Andrew
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