Linux Weekly News
8 hours 47 minutes ago
a police raid at the NGINX office. "Moscow police executed the raid after last week the Rambler Group filed a copyright violation against NGINX Inc., claiming full ownership of the NGINX web server code. The Rambler Group is the parent company of rambler.ru, one of Russia's biggest search engines and internet portals.
According to copies of the search warrant posted on Twitter today, Rambler
claims that Igor Sysoev developed NGINX while he was working as a system
administrator for the company, hence they are the rightful owner of the
2 days 7 hours ago
The saga of get_user_pages() — and the problems it causes within
the kernel — has been extensively chronicled here; see the LWN kernel
for the full series. In short, get_user_pages() is used
to pin user-space pages in memory for some sort of manipulation outside of
the owning process(es); that manipulation can sometimes surprise other
parts of the kernel that think they have exclusive rights to the pages in
from John Hubbard does not solve all of the problems, but
it does create some infrastructure that may make a solution easier to come
2 days 9 hours ago
Security updates have been issued by Fedora (knot-resolver and xen), openSUSE (kernel), and SUSE (haproxy, kernel, and openssl).
3 days 8 hours ago
Linux offers two modes for file I/O: buffered and direct. Buffered I/O
passes through the kernel's page cache; it is relatively easy to use and
can yield significant performance benefits for data that is accessed
multiple times. Direct I/O, instead, goes straight between a user-space
buffer and the storage device. It can be much faster for situations where
caching by the operating system isn't necessary, but it is complex to use
and contains traps for the unwary. Now, it seems, Jens Axboe has come up
way to get many of the benefits of direct I/O
with a lot less bother.
3 days 9 hours ago
Security updates have been issued by CentOS (firefox and nss-softokn), Fedora (samba), Oracle (nss, nss-softokn, nss-util, nss-softokn, and thunderbird), Scientific Linux (thunderbird), SUSE (firefox), and Ubuntu (librabbitmq and samba).
3 days 22 hours ago
The LWN.net Weekly Edition for December 12, 2019 is available.
4 days ago
An effort to protect package downloads from the Python
(PyPI) has resulted in a Python Enhancement Proposal
(PEP) and, perhaps belatedly, some discussion in the wider community. The
basic idea is to use The
(TUF) to protect PyPI users from some
actors who are aiming to interfere with the installation and update of
Python modules. But the name of the PEP and its wording, coupled with some recent typosquatting problems
on PyPI, caused
some confusion along the way. There are some competing interests and
different cultures coming together over this PEP; the process has not run as
smoothly as anyone might want, though that seems to be resolving itself at
4 days 7 hours ago
Security updates have been issued by Arch Linux (crypto++ and thunderbird), Debian (cacti, freeimage, git, and jackson-databind), Fedora (nss), openSUSE (clamav, dnsmasq, munge, opencv, permissions, and shadowsocks-libev), Red Hat (nss, nss-softokn, nss-util, rh-maven35-jackson-databind, and thunderbird), Scientific Linux (nss, nss-softokn, nss-util, nss-softokn, and thunderbird), SUSE (caasp-openstack-heat-templates, crowbar-core, crowbar-openstack, crowbar-ui, etcd, flannel, galera-3, mariadb, mariadb-connector-c, openstack-dashboard-theme-SUSE, openstack-heat-templates, openstack-neutron, openstack-nova, openstack-quickstart, patterns-cloud, python-oslo.messaging, python-oslo.utils, python-pysaml2, libssh, and strongswan), and Ubuntu (git, libpcap, libssh, and thunderbird).
4 days 7 hours ago
The Electronic Frontier Foundation has posted a detailed
on third-party corporate surveillance on the Internet (and
beyond). "Both Google and Apple encourage developers to use ad IDs
for behavioral profiling in lieu of other identifiers like IMEI or phone
number. Ostensibly, this gives users more control over how they are
tracked, since users can reset their identifiers by hand if they
choose. However, in practice, even if a user goes to the trouble to reset
their ad ID, it’s very easy for trackers to identify them across resets by
using other identifiers, like IP address or in-app storage. Android’s
developer policy instructs trackers not to engage in such behavior, but the
platform has no technical safeguards to stop it. In February 2019, a study
found that over 18,000 apps on the Play store were violating Google’s
4 days 7 hours ago
A new mechanism to help thwart return-oriented
(ROP) and similar attacks has recently been added to the
OpenBSD kernel. It will block system calls that are not made via the C
library (libc) system-call wrappers. Instead of being able to string
together some "gadgets" that make a system call directly, an attacker would
need to be able to call the wrapper, which is normally at a randomized location.
5 days 2 hours ago
The Kubernetes scheduler is being overhauled with a series of improvements
that will introduce a new framework and enhanced capabilities that could
help cluster administrators to optimize performance and
utilization. Abdullah Gharaibeh, co-chair of the Kubernetes scheduling
special interest group (SIG
), detailed what has been happening with the
scheduler in recent releases and what's on the roadmap
in a session
at KubeCon + CloudNativeCon North America 2019
5 days 4 hours ago
The Git project has released Git v2.24.1, v2.23.1, v2.22.2, v2.21.1,
v2.20.2, v2.19.3, v2.18.2, v2.17.3, v2.16.6, v2.15.4, and
v2.14.6. "These releases fix various security flaws, which allowed an
attacker to overwrite arbitrary paths, remotely execute code, and/or
overwrite files in the .git/ directory etc." The release notes
contained in this announcement have the details.
5 days 7 hours ago
Google Open Source has announced
Google Summer of Code (GSoC) 2020, a program that introduces university
students to open-source development. "And the 'special sauce' that has
kept this program thriving for 16 years: the mentorship aspect of the
program. Participants gain invaluable experience working directly with
mentors who are dedicated members of these open source communities; mentors
help bring students into their communities while teaching them, guiding
them and helping them find their place in the world of open source."
Applications for interested organizations open on January 14.
5 days 7 hours ago
Security updates have been issued by Debian (firefox-esr, jruby, and squid3), Fedora (librabbitmq, libuv, and xpdf), openSUSE (calamares and opera), Oracle (kernel and nss), Red Hat (httpd24-httpd, kernel, kernel-alt, kpatch-patch, nss-softokn, sudo, and thunderbird), SUSE (apache2-mod_perl, java-1_8_0-openjdk, and postgresql), and Ubuntu (eglibc, firefox, and samba).
5 days 9 hours ago
Daniel Vetter has posted a
summary of his LPC talk
on kernel graphics drivers.
"Unfortunately the business case for 'upstream first' on the kernel
side is completely broken. Not for open source, and not for any fundamental
reasons, but simply because the kernel moves too slowly, is too big,
drivers aren’t well contained enough and therefore customer will not or
even can not upgrade. For some hardware upstreaming early enough is
possible, but graphics simply moves too fast: By the time the upstreamed
driver is actually in shipping distros, it’s already one hardware
generation behind. And missing almost a year of tuning and performance
improvements. Worse it’s not just new hardware, but also GL and Vulkan
versions that won’t work on older kernels due to missing features,
fragmenting the ecosystem further."
6 days 6 hours ago
By the end of the merge window, 12,632 non-merge changesets had been
pulled into the mainline repository for the 5.5 release. This is thus a
busy development cycle — just like the cycles that preceded it. Just over
half of those changesets were pulled after the writing of our first 5.5 merge-window summary
. As is
often the case later in the merge window, many of those changes were
relatively boring fixes. There were still a number of interesting changes,
though; read on for a summary of what happened in the second half of this
6 days 7 hours ago
Security updates have been issued by CentOS (SDL), Debian (htmldoc, librabbitmq, nss, openjdk-7, openslp-dfsg, and phpmyadmin), Fedora (chromium, community-mysql, kernel, libidn2, oniguruma, proftpd, and rabbitmq-server), Mageia (ansible, clamav, evince, firefox, graphicsmagick, icu, libcryptopp, libtasn1, libtiff, libvncserver, libvpx, lz4, nss, openexr, openjpeg2, openssl, phpmyadmin, python-psutil, python-twisted, QT, sdl2_image, SDL_image, sysstat, thunderbird, and tnef), Oracle (firefox), Red Hat (java-1.8.0-ibm and nss), Scientific Linux (firefox and kernel), SUSE (kernel), and Ubuntu (nss).
6 days 9 hours ago
Linus has released the 5.5-rc1
prepatch and closed the merge window for this development cycle. "Everything looks fairly regular - it's a tiny bit larger (in commit
counts) than the few last merge windows have been, but not bigger
enough to really raise any eyebrows. And there's nothing particularly
odd in there either that I can think of: just a bit over half of the
patch is drivers, with the next big area being arch updates. Which is
pretty much the rule for how things have been forever by now.
Outside of that, the documentation and tooling (perf and selftests)
updates stand out, but that's actually been a common pattern for a
while now too, so it's not really surprising either."