Hi!
This is a repost of a previous message, with some new info: the oops is related
to iptables/REDIRECT:
iptables -t nat -I PREROUTING -p tcp --dst 145.66.1.1 \
--dport 1080 -j REDIRECT --to 80 > /dev/null 2>&1
iptables -t nat -I OUTPUT -p tcp --dst 145.66.1.1 \
--dport 1080 -j REDIRECT --to 80 > /dev/null 2>&1
This redirects connects to the machine itself (145.66.1.1) port 1080 to port
80, which is where apache listens. Connecting to http://145.66.1.1:1080/ seems
to result in the reported oops, as reported before. It's very reproducable
here, on several machines. So enjoy!
* Both with standard iptables and iptables-1.2.4 have this problem.
* Based on a previous response I upgraded ksymoops. Didn't change the output
* Using the PREROUTING chain results in the oops. The OUTPUT chain just freezes
the system.
* It's reproducable here, so try for yourself.
* I think it's a bug
Rolf
[fokkensr@iasdev fokkensr]$ ksymoops -k ksyms-2.4.15-pre8 -o /lib/modules/2.4.15-pre8-fks/ -m /boot/System.map-2.4.15-pre8-fks oops-2.4.15-pre8.txt
ksymoops 0.7c on i686 2.4.8-clk. Options used
-V (default)
-k ksyms-2.4.15-pre8 (specified)
-l /proc/modules (default)
-o /lib/modules/2.4.15-pre8-fks/ (specified)
-m /boot/System.map-2.4.15-pre8-fks (specified)
Error (expand_objects): cannot stat(/lib/cpqarray.o) for cpqarray
ksymoops: No such file or directory
Error (expand_objects): cannot stat(/lib/aic7xxx.o) for aic7xxx
ksymoops: No such file or directory
/usr/bin/find: /lib/modules/2.4.15-pre8-fks/build/include/sound/isapnp.h: No such file or directory
Error (pclose_local): find_objects pclose failed 0x100
Warning (compare_ksyms_lsmod): module e1000 is in lsmod but not in ksyms, probably no symbols exported
Error (compare_ksyms_lsmod): module nfsd is in ksyms but not in lsmod
Error (compare_ksyms_lsmod): module lockd is in ksyms but not in lsmod
Error (compare_ksyms_lsmod): module sunrpc is in ksyms but not in lsmod
Warning (map_ksym_to_module): cannot match loaded module cpqarray to a unique module object. Trace may not be reliable.
Oops: 0000
CPU: 0
EIP: 0010:[<c02000c5>]
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010246
eax: 000005dc ebx: edbea7e8 ecx: edca8800 edx: 00000000
esi: ee91c0ac edi: 00000000 ebp: ec6147a4 esp: f0d4bd84
ds: 0010 es: 0018 ss: 0018
Stack: 00000001 f0d4a000 00000003 00000000 edca8800 c01f043d edbea7e8 ec2468ac
ed63c6d4 f77f0084 ee2468c0 f0d4bdc4 c034fed8 c01fef56 00000002 00000003
edbea7e8 00000000 edca8800 c0200024 00000045 ec63c6d4 f77f0084 ee2468c0
Call Trace: <c01f043d> <c01fef56> <c0200024> <c01163cc> <c0215589>
<c020f648> <c020fc02> <c0130521> <c02106df> <c0205a2b> <c0222edc>
<c0222f16> <c01e056d> <c0222edc> <c01e078b> <c014329e> <c01076a3>
Code: 8a 87 4c 03 00 00 3c 02 74 0a 3c 01 75 0b f6 45 20 04 75 05
>>EIP; c02000c5 <ip_queue_xmit2+a1/22c> <=====
Trace; c01f043d <nf_hook_slow+19d/21c>
Trace; c01fef56 <ip_queue_xmit+28e/300>
Trace; c0200024 <ip_queue_xmit2+0/22c>
Trace; c01163cc <schedule+500/8d0>
Trace; c0215589 <tcp_v4_send_check+6d/ac>
Trace; c020f648 <tcp_cwnd_restart+18/a4>
Trace; c020fc02 <tcp_transmit_skb+52e/5ec>
Trace; c0130521 <__lock_page+91/9c>
Trace; c02106df <tcp_write_xmit+18f/2dc>
Trace; c0205a2b <tcp_sendmsg+fd7/1370>
Trace; c0222edc <inet_sendmsg+0/40>
Trace; c0222f16 <inet_sendmsg+3a/40>
Trace; c01e056d <sock_sendmsg+81/a4>
Trace; c0222edc <inet_sendmsg+0/40>
Trace; c01e078b <sock_write+a3/ac>
Trace; c014329e <sys_write+8e/c4>
Trace; c01076a3 <system_call+2f/34>
Code; c02000c5 <ip_queue_xmit2+a1/22c>
00000000 <_EIP>:
Code; c02000c5 <ip_queue_xmit2+a1/22c> <=====
0: 8a 87 4c 03 00 00 mov 0x34c(%edi),%al <=====
Code; c02000cb <ip_queue_xmit2+a7/22c>
6: 3c 02 cmp $0x2,%al
Code; c02000cd <ip_queue_xmit2+a9/22c>
8: 74 0a je 14 <_EIP+0x14> c02000d9 <ip_queue_xmit2+b5/22c>
Code; c02000cf <ip_queue_xmit2+ab/22c>
a: 3c 01 cmp $0x1,%al
Code; c02000d1 <ip_queue_xmit2+ad/22c>
c: 75 0b jne 19 <_EIP+0x19> c02000de <ip_queue_xmit2+ba/22c>
Code; c02000d3 <ip_queue_xmit2+af/22c>
e: f6 45 20 04 testb $0x4,0x20(%ebp)
Code; c02000d7 <ip_queue_xmit2+b3/22c>
12: 75 05 jne 19 <_EIP+0x19> c02000de <ip_queue_xmit2+ba/22c>
2 warnings and 6 errors issued. Results may not be reliable.
[fokkensr@iasdev fokkensr]$ rpm -q -i kernel-2.4.15-pre8-freeswan-1.91-1fks-7redhat
Name : kernel-2.4.15-pre8-freeswan-1.91 Relocations: (not relocateable)
Version : 1fks Vendor: (none)
Release : 7redhat Build Date: Wed 21 Nov 2001 02:39:43 PM CET
Install date: Wed 21 Nov 2001 03:07:58 PM CET Build Host: iasdev
Group : System Environment/Kernel Source RPM: kernel-2.4.15-pre8-freeswan-1.91-1fks-7redhat.src.rpm
Size : 26095803 License: GPL
URL : http://www.kernel.org/
Summary : A kernel with FreeS/WAN included
Description :
Linux kernel 2.4.15-pre8
* FreeS/WAN 1.91
* X.509 Certificate Support 0.8.5
* 3Dfx module
* Alsa 0.5.12
* QLogic Fibre Channel Driver for QLA2x00 4.25
* VLAN packet size support for 3c59x NICs
* HZ is 2048 instead of 100
* iptables 1.2.4
* lm_sensors 2.6.1
* Intel e1000 3.1.23
and more in the future.
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This archive was generated by hypermail 2b29 : Fri Nov 30 2001 - 21:00:24 EST