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Filename Latest commit message Latest commit date
Dan Williams 966d23a006 libnvdimm/label: Clear 'updating' flag after label-set update 
The UEFI 2.7 specification sets expectations that the 'updating' flag is
eventually cleared. To date, the libnvdimm core has never adhered to
that protocol. The policy of the core matches the policy of other
multi-device info-block formats like MD-Software-RAID that expect
administrator intervention on inconsistent info-blocks, not automatic
invalidation.

However, some pre-boot environments may unfortunately attempt to "clean
up" the labels and invalidate a set when it fails to find at least one
"non-updating" label in the set. Clear the updating flag after set
updates to minimize the window of vulnerability to aggressive pre-boot
environments.

Ideally implementations would not write to the label area outside of
creating namespaces.

Note that this only minimizes the window, it does not close it as the
system can still crash while clearing the flag and the set can be
subsequently deleted / invalidated by the pre-boot environment.

Fixes: f524bf271a ("libnvdimm: write pmem label set")
Cc: <stable@vger.kernel.org>
Cc: Kelly Couch <kelly.j.couch@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2019-01-15 10:47:00 -08:00
arch ARM: SoC fixes 2019-01-14 10:34:14 +12:00
block
certs
crypto
Documentation ARM: SoC fixes 2019-01-14 10:34:14 +12:00
drivers libnvdimm/label: Clear 'updating' flag after label-set update 2019-01-15 10:47:00 -08:00
firmware
fs for-5.0-rc1-tag 2019-01-14 05:55:51 +12:00
include ARM: SoC fixes 2019-01-14 10:34:14 +12:00
init
ipc
kernel kernel/sys.c: Clarify that UNAME26 does not generate unique versions anymore 2019-01-14 10:38:03 +12:00
lib
LICENSES
mm
net
samples
scripts remove dma_zalloc_coherent 2019-01-12 10:52:40 -08:00
security
sound remove dma_zalloc_coherent 2019-01-12 10:52:40 -08:00
tools
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS Staging driver fixes for 5.0-rc2 2019-01-14 05:49:35 +12:00
Makefile Linux 5.0-rc2 2019-01-14 10:41:12 +12:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.