| Description: | The kernel packages contain the Linux kernel, the core of any Linuxoperating system.* A NULL pointer dereference flaw was found in the rds_iw_laddr_check()function in the Linux kernel's implementation of Reliable Datagram Sockets(RDS). A local, unprivileged user could use this flaw to crash the system.(CVE-2014-2678, Moderate)* It was found that the Xen hypervisor implementation did not properlyclean memory pages previously allocated by the hypervisor. A privilegedguest user could potentially use this flaw to read data relating to otherguests or the hypervisor itself. (CVE-2014-4021, Moderate)Red Hat would like to thank the Xen project for reporting CVE-2014-4021.Upstream acknowledges Jan Beulich as the original reporter.This update also fixes the following bugs:* A bug in the journaling block device (jbd and jbd2) code could, undercertain circumstances, trigger a BUG_ON() assertion and result in a kerneloops. This happened when an application performed an extensive number ofcommits to the journal of the ext3 file system and there was no currentlyactive transaction while synchronizing the file's in-core state. Thisproblem has been resolved by correcting respective test conditions in thejbd and jbd2 code. (BZ#1097528)* After a statically defined gateway became unreachable and itscorresponding neighbor entry entered a FAILED state, the gateway stayed inthe FAILED state even after it became reachable again. As a consequence,traffic was not routed through that gateway. This update allows probingsuch a gateway automatically so that the traffic can be routed throughthis gateway again once it becomes reachable. (BZ#1106354)* Due to an incorrect condition check in the IPv6 code, the ipv6 driverwas unable to correctly assemble incoming packet fragments, which resultedin a high IPv6 packet loss rate. This update fixes the said check for afragment overlap and ensures that incoming IPv6 packet fragments are nowprocessed as expected. (BZ#1107932)* Recent changes in the d_splice_alias() function introduced a bug thatallowed d_splice_alias() to return a dentry from a different directorythan the directory being looked up. As a consequence in clusterenvironment, a kernel panic could be triggered when a directory was beingremoved while a concurrent cross-directory operation was performed on thisdirectory on another cluster node. This update avoids the kernel panic inthis situation by correcting the search logic in the d_splice_alias()function so that the function can no longer return a dentry from anincorrect directory. (BZ#1109720)* The NFSv4 server did not handle multiple OPEN operations to the same fileseparately, which could cause the NFSv4 client to repeatedly send CLOSErequests with the same state ID, even though the NFS server rejected therequest with an NFS4ERR_OLD_STATEID (10024) error code. This updateensures that the NFSv4 client no longer re-sends the same CLOSE requestafter receiving NFS4ERR_OLD_STATEID. (BZ#1113468)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. |