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Filename Latest commit message Latest commit date
Thomas Gleixner b99328a60a timekeeping/vsyscall: Prevent math overflow in BOOTTIME update 
The VDSO update for CLOCK_BOOTTIME has a overflow issue as it shifts the
nanoseconds based boot time offset left by the clocksource shift. That
overflows once the boot time offset becomes large enough. As a consequence
CLOCK_BOOTTIME in the VDSO becomes a random number causing applications to
misbehave.

Fix it by storing a timespec64 representation of the offset when boot time
is adjusted and add that to the MONOTONIC base time value in the vdso data
page. Using the timespec64 representation avoids a 64bit division in the
update code.

Fixes: 44f57d788e ("timekeeping: Provide a generic update_vsyscall() implementation")
Reported-by: Chris Clayton <chris2553@googlemail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Chris Clayton <chris2553@googlemail.com>
Tested-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Link: https://lkml.kernel.org/r/alpine.DEB.2.21.1908221257580.1983@nanos.tec.linutronix.de
2019-08-23 02:12:11 +02:00
arch Wimplicit-fallthrough patches for 5.3-rc6 2019-08-22 11:26:10 -07:00
block block: remove REQ_NOWAIT_INLINE 2019-08-15 11:09:16 -06:00
certs
crypto
Documentation pci-v5.3-fixes-1 2019-08-22 14:04:47 -07:00
drivers pci-v5.3-fixes-1 2019-08-22 14:04:47 -07:00
fs AFS fixes 2019-08-22 11:12:33 -07:00
include timekeeping/vsyscall: Prevent math overflow in BOOTTIME update 2019-08-23 02:12:11 +02:00
init
ipc
kernel timekeeping/vsyscall: Prevent math overflow in BOOTTIME update 2019-08-23 02:12:11 +02:00
lib
LICENSES
mm hugetlbfs: fix hugetlb page migration/fault race causing SIGBUS 2019-08-13 16:06:53 -07:00
net netfilter: nf_tables: map basechain priority to hardware priority 2019-08-18 14:13:23 -07:00
samples auxdisplay: Fix a typo in cfag12864b-example.c 2019-08-08 20:00:18 +02:00
scripts SPDX fixes for 5.3-rc5 2019-08-18 09:26:16 -07:00
security KEYS: trusted: allow module init if TPM is inactive or deactivated 2019-08-13 19:59:23 +03:00
sound sound fixes for 5.3-rc5 2019-08-16 08:49:45 -07:00
tools * A couple bugfixes, and mostly selftests changes. 2019-08-21 11:48:38 -07:00
usr
virt KVM/arm fixes for 5.3, take #2 2019-08-09 16:53:50 +02:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS * A couple bugfixes, and mostly selftests changes. 2019-08-21 11:48:38 -07:00
Makefile Linux 5.3-rc5 2019-08-18 14:31:08 -07:00
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.