| Summary: | Kernel unaligned access in iptables on Alpha processor with alpha-sources kernel | ||
|---|---|---|---|
| Product: | Gentoo Linux | Reporter: | Bert Smith <bert> |
| Component: | [OLD] Core system | Assignee: | Alpha Porters <alpha> |
| Status: | RESOLVED FIXED | ||
| Severity: | normal | ||
| Priority: | High | ||
| Version: | unspecified | ||
| Hardware: | Alpha | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Package list: | Runtime testing required: | --- | |
| Bug Depends on: | |||
| Bug Blocks: | 371525 | ||
The alpha-sources package is no longer in portage and there have been many kernel revisions since February 2004. I'm not sure in which kernel revision this was fixed, but I when looked at version 2.6.5 the bug appears to be fixed. The bug also appears to be fixed in 2.4.28. http://lxr.linux.no/source/net/ipv4/netfilter/ip_tables.c?v=2.4.28#L259 http://glide.stanford.edu/lxr/source/net/ipv4/netfilter/ip_tables.c?v=linux-2.6.5#L267 Maybe this bug should be closed? Agree with Thomas. I suppose the problem is solved. Please, reopen if need something more. Thanks Thomas! |
The alpha-sources kernel running on Miata (untested on other hardware) causes unaligned access in iptables whenever a packet is recieved, the problem lies in net/ipv4/netfilter/ip_tables.c line 262: static const char nulldevname[IFNAMSIZ] = { 0 }; Forcing nulldevname to be aligned along an 8 byte boundary corrects this problem with the following change: static const char nulldevname[IFNAMSIZ] __attribute__ ((aligned (8))) = { 0 }; Other people don`t seem to have this problem, so perhaps it is dependant on kernel configuration and/or hardware Reproducible: Always Steps to Reproduce: 1. 2. 3.