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HistoryMay 12, 2016 - 7:36 a.m.

(RHSA-2016:1055) Important: kernel-rt security and bug fix update


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

The following packages have been upgraded to a newer upstream version: kernel-rt (3.10.0-327.18.2). This version provides a number of bug fixes and enhancements, including:

  • [scsi] bnx2fc: Fix FCP RSP residual parsing and remove explicit logouts

  • [scsi] mpt3sas: Fix for Asynchronous completion of timedout IO and task abort of timedout IO

  • [scsi] scsi_error: should not get sense for timeout IO in scsi error handler

  • [scsi] Revert libiscsi: Reduce locking contention in fast path

  • [mm] madvise: fix MADV_WILLNEED on shmem swapouts

  • [cpufreq] intel_pstate: decrease number of “HWP enabled” messages and enable HWP per CPU

  • [kernel] sched: Robustify topology setup

  • [kernel] sched/fair: Disable tg load_avg/runnable_avg update for root_task_group

  • [kernel] sched/fair: Move hot load_avg/runnable_avg into separate cacheline

  • [ib] mlx5: Fix RC transport send queue overhead computation

  • [fs] nfsd: fix clp->cl_revoked list deletion causing softlock in nfsd

  • [fs] ceph: multiple updates


Security Fix(es):

  • A flaw was found in the way the Linux kernel’s ASN.1 DER decoder processed certain certificate files with tags of indefinite length. A local, unprivileged user could use a specially crafted X.509 certificate DER file to crash the system or, potentially, escalate their privileges on the system. (CVE-2016-0758, Important)

Red Hat would like to thank Philip Pettersson of Samsung for reporting this issue.

Bug Fix(es):

  • The hotplug lock and the console semaphore could be acquired in an incorrect order, which could previously lead to a deadlock causing the system console to freeze. The underlying code has been adjusted to acquire the locks in the correct order, resolving the bug with the console. (BZ#1267425)