kernel-3.10.0-327.3.1.el7

The kernel package contains the Linux kernel (vmlinuz), the core of any
Linux operating system. The kernel handles the basic functions
of the operating system: memory allocation, process allocation, device
input and output, etc.

Security issues fixed with this release:

CVE-2015-5307
The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x
through 4.6.x, allows guest OS users to cause a denial of service
(host OS panic or hang) by triggering many #AC (aka Alignment Check)
exceptions, related to svm.c and vmx.c.
CVE-2015-8104
The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x
through 4.6.x, allows guest OS users to cause a denial of service
(host OS panic or hang) by triggering many #DB (aka Debug) exceptions,
related to svm.c.

Fixed bugs:

* On Intel Xeon v5 platforms, the processor frequency was always tied to the highest possible frequency. Switching p-states on these client platforms failed. This update sets the idle frequency, busy frequency, and processor frequency values by determining the range and adjusting the minimal and maximal percent limit values. Now, switching p-states on the aforementioned client platforms proceeds successfully.
* Due to a validation error of in-kernel memory-mapped I/O (MMIO) tracing, a VM became previously unresponsive when connected to Red Hat Enterprise Virtualization Hypervisor. The provided patch fixes this bug by dropping the check in MMIO handler, and a VM continues running as expected.
* Due to retry-able command errors, the NVMe driver previously leaked I/O descriptors and DMA mappings. As a consequence, the kernel could become unresponsive during the hot-unplug operation if a driver was removed. This update fixes the driver memory leak bug on command retries, and the kernel no longer hangs in this situation.
* The hybrid_dma_data() function was not initialized before use, which caused an invalid memory access when hot-plugging a PCI card. As a consequence, a kernel oops occurred. The provided patch makes sure hybrid_dma_data() is initialized before use, and the kernel oops no longer occurs in this situation.
* When running PowerPC (PPC) KVM guests and the host was experiencing a lot of page faults, for example because it was running low on memory, the host sometimes triggered an incorrect kind of interrupt in the guest: a data storage exception instead of a data segment exception. This caused a kernel panic of the PPC KVM guest. With this update, the host kernel synthesizes a segment fault if the corresponding Segment Lookaside Buffer (SLB) lookup fails, which prevents the kernel panic from occurring.
* The kernel accessed an incorrect area of the khugepaged process causing Logical Partitioning (LPAR) to become unresponsive, and an oops occurred in medlp5. The backported upstream patch prevents an LPAR hang, and the oops no longer occurs.
* When the sctp module was loaded and a route to an association endpoint was removed after receiving an Out-of-The-Blue (OOTB) chunk but before incrementing the "dropped because of missing route" SNMP statistic, a Null Pointer Dereference kernel panic previously occurred. This update fixes the race condition between OOTB response and route removal.
* The cpuscaling test of the certification test suite previously failed due to a rounding bug in the intel-pstate driver. This bug has been fixed and the cpuscaling test now passes.