RHBA-2016:1782 - Bug Fix Advisory

Topic

Updated kernel packages that fix one bug are now available for Red Hat
Enterprise Linux 5.

Description

The kernel packages contain the Linux kernel, the core of any Linux operating
system.

This update fixes the following bug:

• Previously, the d_materialise_unique() function contained a condition that

caused that the dcache lock was in some cases unlocked twice. As a consequnce, a
kernel crash occurred. With this update, the d_materialise_unique() function has
been fixed not to release the dcache lock twice, and the kernel no longer
crashes in the described situation. (BZ#1198315)

• Previously, random kernel crashes could occur due to memory clobber or

low-address protection exceptions. This was happening because the Translation
Lookaside Buffer (TLB) flushing was not fully compliant with the segment table
format. With this update, the tlb_flushing() functions have been fixed, and the
system no longer crashes in the described situation. (BZ#1350541)

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.

Solution

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux Server 5 x86_64
• Red Hat Enterprise Linux Server 5 ia64
• Red Hat Enterprise Linux Server 5 i386
• Red Hat Enterprise Linux Workstation 5 x86_64
• Red Hat Enterprise Linux Workstation 5 i386
• Red Hat Enterprise Linux Desktop 5 x86_64
• Red Hat Enterprise Linux Desktop 5 i386
• Red Hat Enterprise Linux for IBM z Systems 5 s390x
• Red Hat Enterprise Linux for Power, big endian 5 ppc

Fixes

CVEs

(none)

References

(none)