Chapter 1. Package Updates

1.1. RHSA-2011:0330: Important: kernel-rt security and bug fix update

Important

This update was released as the security errata RHSA-2011:0330 - Important: kernel-rt security and bug fix update for Red Hat Enterprise Linux 5.
BZ#659574
A flaw was found in the Linux kernel where, if used in conjunction with another flaw that can result in a kernel Oops, could possibly lead to privilege escalation. It does not affect Red Hat Enterprise MRG as the sysctl panic_on_oops variable is turned on by default. However, as a preventive measure if the variable is turned off by an administrator, this update addresses the issue. Red Hat would like to thank Nelson Elhage for reporting this issue.
BZ#637043
An integer overflow flaw was found in the remap_file_pages() system call in the Linux kernel. We were able to reproduce the integer overflow, but were unable to trigger anything more (for example, a denial of service). As a preventative measure, this update backports a fix to correct this issue. Red Hat would like to thank Thomas Pollet for reporting this issue.
BZ#660306
TSC (Time Stamp Counter) calibration initiated at kernel boot now uses a workqueue instead of being performed inline. This allows for a more accurate calibration logic which takes longer to complete, but does not increase the boot time.