Red Hat Enterprise and CentOS Kernel Update
A Red Hat Enterprise and Centos Kernel Update from Red Hat Bug Fix Advisory (RHAB) informs the users of Red Hat Linux Servers (RHEL) and Red Hat Linux Desktop operating system to update and install the new linux kernel. The Initial announcement was for the Enterprise edition but the release applied to all.
The new Kernel is 2.6.18 edition and not the latest Linux Kernel Version.
This update fixes the following bugs:
- Due to an incorrect setting of an utrace flag, the kernel was unable to handle kernel NULL pointer dereference in the utrace_unsafe_exec() function. As a consequence, kernel crash occurred. A patch has been provided to fix this bug, and kernel no longer crashes in this situation. (BZ#1226967)
- When a request times out, an AP queue reset is triggered to recover and reinitialize the AP queue. However, due to newly changed firmware behavior, the reset execution could be delayed based on the priority of the pending request. As a consequence, the device driver’s waiting time frame was limited as it did not receive the reset response, and interrupts were not enabled afterwards. With this update, the RAPQ (queue reset) and AQIC (interrupt control) commands are treated fully asynchronously, and the device driver now checks the reset and interrupt states periodically, thus handling the reinitialization properly. (BZ#1238991)
Users of kernel are advised to upgrade to these updated packages, which fix these bugs. The system must be rebooted for this update to take effect.