RHSA-2015:0695: Important: kernel security and bug fix update

The kernel packages contain the Linux kernel, the core of any Linuxoperating system. A flaw was found in the way the Linux kernel's SCTP implementation validated INIT chunks when performing Address Configuration Change(ASCONF). A remote attacker could use this flaw to crash the system bysending a specially crafted SCTP packet to trigger a NULL pointerdereference on the system. (CVE-2014-7841, Important) It was found that the Linux kernel's Infiniband subsystem did not properly sanitize input parameters while registering memory regions fromuser space via the (u)verbs API. A local user with access to a/dev/infiniband/uverbsX device could use this flaw to crash the system or,potentially, escalate their privileges on the system. (CVE-2014-8159,Important) An integer overflow flaw was found in the way the Linux kernel's Frame Buffer device implementation mapped kernel memory to user space via themmap syscall. A local user able to access a frame buffer device file(/dev/fb) could possibly use this flaw to escalate their privileges on thesystem. (CVE-2013-2596, Important) It was found that the parserockridgeinodeinternal() function of the Linux kernel's ISOFS implementation did not correctly check relocateddirectories when processing Rock Ridge child link (CL) tags. An attackerwith physical access to the system could use a specially crafted ISO imageto crash the system or, potentially, escalate their privileges on thesystem. (CVE-2014-5471, CVE-2014-5472, Low)Red Hat would like to thank Mellanox for reporting the CVE-2014-8159 issue.The CVE-2014-7841 issue was discovered by Liu Wei of Red Hat.This update also fixes the following bugs: Previously, certain network device drivers did not accept ethtool commands right after they were loaded. As a consequence, the currentsetting of the specified device driver was not applied and an error messagewas returned. The ETHTOOLDELAY variable has been added, which makes surethe ethtool utility waits for some time before it tries to apply theoptions settings, thus fixing the bug. (BZ#1138299) During the memory allocation for a new socket to communicate to the server, the rpciod daemon released a clean page which needed to becommitted. However, the commit was queueing indefinitely as the commitcould only be provided with a socket connection. As a consequence, adeadlock occurred in rpciod. This update sets the PFFSTRANS flag on thework queue task prior to the socket allocation, and adds thenfsreleasepage check for the flag when deciding whether to make a commitcall, thus fixing this bug. (BZ#1192326)All kernel users are advised to upgrade to these updated packages, whichcontain backported patches to correct these issues. The system must berebooted for this update to take effect.