USN-661-1: Linux kernel regression
Publication date
30 October 2008
Overview
Linux kernel regression
Releases
Details
Version 2.6.27 of the Linux kernel changed the order of options in
TCP headers. While this change was RFC-compliant, it was found that
some old routers and consumer DSL modems would not route traffic for
these systems when TCP timestamps were enabled. As a workaround, TCP
timestamps were disabled via sysctl.
This update restores the previous ordering of TCP options, and
reenables TCP timestamps. We apologize for the inconvenience.
Version 2.6.27 of the Linux kernel changed the order of options in
TCP headers. While this change was RFC-compliant, it was found that
some old routers and consumer DSL modems would not route traffic for
these systems when TCP timestamps were enabled. As a workaround, TCP
timestamps were disabled via sysctl.
This update restores the previous ordering of TCP options, and
reenables TCP timestamps. We apologize for the inconvenience.
Update instructions
After a standard system upgrade you need to reboot your computer to effect the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 8.10 intrepid | linux-image-2.6.27-7-virtual – 2.6.27-7.15 | ||
| linux-image-2.6.27-7-generic – 2.6.27-7.15 | |||
| linux-image-2.6.27-7-server – 2.6.27-7.15 | |||
| procps – 1:3.2.7-9ubuntu2.1 | |||
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