Messages in this thread Patch in this message | ![/](/images/icornerl.gif) | | From | "Beau E. Cox" <> | Subject | PROBLEM: PATCH for 2.4.23-pre4 and up hang on one system | Date | Sat, 8 Nov 2003 18:27:28 -1000 |
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submitted Sat Nov 8 13:08:55 HST 2003 by Beau E. Cox <beau@beaucox.com>
[1.] One line summary of the problem:
Patch that fixes my problem: Starting with 2.4.23-pre4 my system hangs during startup and/or is generally unstable (see patch in [ X. ] below.)
[2.] Full description of the problem/report:
Origionally I had catagorized this problem with the startup sequence; the system always seemed to hang when squid was started before mysql, etc. Moving squid near the end of the startup process, I thought the problem was in hand. However, the system (pre9) proved unstable (would not stay up for longer than one day.)
The problem exhibits itself with a solid 'hang'; no oops, no dumps, nada.
[ 3. ] - [ 7. ]
See previous posting; no hardware or configuration changes.
[X.] Other notes, patches, fixes, workarounds:
This patch to net/ipv4/netfilter/ip_nat_core.c fixed my problem in all 2.4.23 versions pre4 - pre9:
--- linux-2.4.23-pre4/net/ipv4/netfilter/ip_nat_core.c 2003-11-08 03:01:59.000000000 -1000 +++ linux-2.4.23-pre3/net/ipv4/netfilter/ip_nat_core.c 2003-11-08 03:00:47.000000000 -1000 @@ -157,8 +157,8 @@ continue; } - if (!(mr->range[i].flags & IP_NAT_RANGE_PROTO_SPECIFIED) - || proto->in_range(&newtuple, IP_NAT_MANIP_SRC, + if ((mr->range[i].flags & IP_NAT_RANGE_PROTO_SPECIFIED) + && proto->in_range(&newtuple, IP_NAT_MANIP_SRC, &mr->range[i].min, &mr->range[i].max)) return 1; } It is simply a rollback of changes to ip_nat_core.c made in pre4.
Since my patch is to ip_nat_core.c, I should mention that I use NAT via iptables. Here is an the relevant section if my iptables startup script:
[...] # setup nat echo " applying nat rules" echo "" $iptables -F FORWARD $iptables -F -t nat $iptables -P FORWARD DROP $iptables -A FORWARD -i eth0 -j ACCEPT $iptables -A INPUT -i eth0 -j ACCEPT $iptables -A OUTPUT -o eth0 -j ACCEPT $iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT $iptables -t nat -A POSTROUTING -s 10.0.0.0/8 -o eth1 -j SNAT --to-source x.x.x.x [...]
All the information I can think of relating to this problem is at:
ftp://beaucox.com/pub/kernel/2.4.23-pre4-bug
Please see the README file.
---------------------------WARNING-------------------------- I am NOT a kernel programmer. The patch above was arrived at by hit-or-miss. I REALLY don't know what I am doing (but my system works now!) ---------------------------WARNING-------------------------- Aloha => Beau;
PS: Please let me know if you need more information.
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