Whamcloud Community JIRA

[LU-8134] kernel update [RHEL7.2 3.10.0-327.18.2.el7]

Related — Mon, 12 Sep 2016 15:59:45 +0000

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)

Bug Fix(es):

Under certain conditions, the migration threads could race with the CPU
hotplug, which could cause a deadlock. A set of patches has been provided to fix
this bug, and the deadlock no longer occurs in the system. (BZ#1299338)

A bug in the code that cleans up revoked delegations could previously cause a
soft lockup in the NFS server. This patch fixes the underlying source code, so
the lockup no longer occurs. (BZ#1311582)

The second attempt to reload Common Application Programming Interface (CAPI)
devices on the little-endian variant of IBM Power Systems previously failed. The
provided set of patches fixes this bug, and reloading works as intended.
(BZ#1312396)

Due to inconsistencies in page size of IOMMU, the NVMe device, and the kernel,
the BUG_ON signal previously occurred in the nvme_setup_prps() function, leading
to the system crash while setting up the DMA transfer. The provided patch sets
the default NVMe page size to 4k, thus preventing the system crash. (BZ#1312399)

Previously, on a system using the Infiniband mlx5 driver used for the SRP
stack, a hard lockup previously occurred after the kernel exceeded time with
lock held with interrupts blocked. As a consequence, the system panicked. This
update fixes this bug, and the system no longer panics in this situation.
(BZ#1313814)

On the little-endian variant of IBM Power Systems, the kernel previously
crashed in the bitmap_weight() function while running the memory affinity
script. The provided patch fortifies the topology setup and prevents sd->child
from being set to NULL when it is already NULL. As a result, the memory affinity
script runs successfully. (BZ#1316158)

When a KVM guest wrote random values to the special-purpose registers (SPR)
Instruction Authority Mask Register (IAMR), the guest and the corresponding QEMU
process previously hung. This update adds the code which sets SPRs to a suitable
neutral value on guest exit, thus fixing this bug. (BZ#1316636)

Under heavy iSCSI traffic load, the system previously panicked due to a race
in the locking code leading to a list corruption. This update fixes this bug,
and the system no longer panics in this situation. (BZ#1316812)

During SCSI exception handling (triggered by some irregularities), the driver
could previously use an already retired SCSI command. As a consequence, a kernel
panic or data corruption occurred. The provided patches fix this bug, and
exception handling now proceeds successfully. (BZ#1316820)

When the previously opened /dev/tty, which pointed to a pseudo terminal (pty)
pair, was the last file closed, a kernel crash could previously occur. The
underlying source code has been fixed, preventing this bug. (BZ#1320297)

Previously, when using VPLEX and FCoE via the bnx2fc driver, different degrees
of data corruption occurred. The provided patch fixes the FCP Response (RSP)
residual parsing in bnx2fc, which prevents the aforementioned corruption.
(BZ#1322279)

Bugs fixed (https://bugzilla.redhat.com/):

1300257 - CVE-2016-0758 kernel: tags with indefinite length can corrupt pointers in asn1_find_indefinite_length()