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LWN.net is a comprehensive source of news and opinions from and about the Linux community. This is the main LWN.net feed, listing all articles which are posted to the site front page.
업데이트: 5분 11초 지남

Wine 4.0 released

목, 2019/01/24 - 3:06오전
Version 4.0 of the Wine Windows compatibility layer is out. "This release represents a year of development effort and over 6,000 individual changes" New features include initial Direct3D 12 support, a Vulkan graphics driver, support for high-DPI displays (but only on Android) and more; see the release notes for details.
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Stable kernel updates

목, 2019/01/24 - 1:05오전
Stable kernels 4.20.4, 4.19.17, 4.14.95, and 4.9.152 have been released. They all contain important fixes and users should upgrade.
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Security updates for Wednesday

목, 2019/01/24 - 12:59오전
Security updates have been issued by Debian (libjpeg-turbo and systemd), Fedora (matrix-synapse, mingw-libjpeg-turbo, and mingw-libvorbis), Mageia (libcaca, libmp4v2, libxml2, pdns-recursor, perl-Email-Address, php-pear-HTML_QuickForm, podofo, and wavpack), openSUSE (webkit2gtk3), Red Hat (qemu-kvm-rhev), Scientific Linux (perl), Slackware (httpd), and Ubuntu (ntp).
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Security updates for Tuesday

수, 2019/01/23 - 12:57오전
Security updates have been issued by Debian (apt and aria2), Fedora (kernel-headers, kernel-tools, and openssh), openSUSE (webkit2gtk3), Oracle (perl), Red Hat (perl), SUSE (freerdp, python-urllib3, systemd, and wireshark), and Ubuntu (apt, poppler, and tiff).
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[$] Persistent memory for transient data

화, 2019/01/22 - 4:54오전
Arguably, the most notable characteristic of persistent memory is that it is persistent: it retains its contents over power cycles. One other important aspect of these persistent-memory arrays that, we are told, will soon be everywhere, is their sheer size and low cost; persistent memory is a relatively inexpensive way to attach large amounts of memory to a system. Large, cheap memory arrays seem likely to be attractive to users who may not care about persistence and who can live with slower access speeds. Supporting such users is the objective of a pair of patch sets that have been circulating in recent months.
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Kernel prepatch 5.0-rc3

화, 2019/01/22 - 3:54오전
The 5.0-rc3 kernel prepatch has been released. "This rc is a bit bigger than usual. Partly because I missed a networking pull request for rc2, and as a result rc3 now contains _two_ networking pull updates. But part of it may also just be that it took a while for people to find and then fix bugs after the holiday season."
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Security updates for Monday

화, 2019/01/22 - 12:54오전
Security updates have been issued by Fedora (gitolite3, gvfs, php, radare2, and syslog-ng), Mageia (libssh, php, python-django16, and rdesktop), openSUSE (podofo), and SUSE (libraw, openssh, PackageKit, and wireshark).
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[$] A proposed API for full-memory encryption

토, 2019/01/19 - 1:30오전
Hardware memory encryption is, or will soon be, available on multiple generic CPUs. In its absence, data is stored — and passes between the memory chips and the processor — in the clear. Attackers may be able to access it by using hardware probes or by directly accessing the chips, which is especially problematic with persistent memory. One new memory-encryption offering is Intel's Multi-Key Total Memory Encryption (MKTME) [PDF]; AMD's equivalent is called Secure Encrypted Virtualization (SEV). The implementation of support for this feature is in progress for the Linux kernel. Recently, Alison Schofield proposed a user-space API for MKTME, provoking a long discussion on how memory encryption should be exposed to the user, if at all.
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Security updates for Friday

토, 2019/01/19 - 12:55오전
Security updates have been issued by Debian (drupal7), Fedora (electrum and perl-Email-Address), Mageia (gthumb), openSUSE (gitolite, kernel, krb5, libunwind, LibVNCServer, live555, mutt, wget, and zeromq), SUSE (krb5, mariadb, nodejs4, nodejs8, soundtouch, and zeromq), and Ubuntu (irssi).
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[$] Defending against page-cache attacks

금, 2019/01/18 - 2:04오전
The kernel's page cache works to improve performance by minimizing disk I/O and increasing the sharing of physical memory. But, like other performance-enhancing techniques that involve resources shared across security boundaries, the page cache can be abused as a way to extract information that should be kept secret. A recent paper [PDF] by Daniel Gruss and colleagues showed how the page cache can be targeted for a number of different attacks, leading to an abrupt change in how the mincore() system call works at the end of the 5.0 merge window. But subsequent discussion has made it clear that mincore() is just the tip of the iceberg; it is unclear what will really need to be done to protect a system against page-cache attacks or what the performance cost might be.
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Stable kernel updates

금, 2019/01/18 - 1:09오전
Stable kernels 4.20.3, 4.19.16, 4.14.94, 4.9.151, and 4.4.171 have been released. They all contain important fixes and users should upgrade.
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Security updates for Thursday

금, 2019/01/18 - 1:01오전
Security updates have been issued by CentOS (libvncserver), Debian (sssd), Fedora (kernel and kernel-headers), Red Hat (ansible, openvswitch, pyOpenSSL, python-django, and redis), and Ubuntu (policykit-1).
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[$] LWN.net Weekly Edition for January 17, 2019

목, 2019/01/17 - 11:32오전
The LWN.net Weekly Edition for January 17, 2019 is available.
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[$] Adiantum: encryption for the low end

목, 2019/01/17 - 5:59오전
Low-end devices bound for developing countries, such as those running the Android Go edition, lack encryption support because the hardware doesn't provide any cryptographic acceleration. That means users in developing countries have no protection for the data on their phones. Google would like to change that situation. The company worked on adding the Speck cipher to the kernel, but decided against using it because of opposition due to Speck's origins at the US National Security Agency (NSA). As a replacement, the Adiantum encryption mode was developed; it has been merged for Linux 5.0.
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Security updates for Wednesday

목, 2019/01/17 - 12:55오전
Security updates have been issued by Debian (systemd and wireshark), Fedora (openssh, php-horde-Horde-Form, and unrtf), Mageia (aria2, libvncserver, x11vnc, and nss), Oracle (kernel and libvncserver), Scientific Linux (libvncserver), SUSE (kernel, soundtouch, webkit2gtk3, and wget), and Ubuntu (libcaca and policykit-1).
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[$] Ringing in a new asynchronous I/O API

수, 2019/01/16 - 8:09오전
While the kernel has had support for asynchronous I/O (AIO) since the 2.5 development cycle, it has also had people complaining about AIO for about that long. The current interface is seen as difficult to use and inefficient; additionally, some types of I/O are better supported than others. That situation may be about to change with the introduction of a proposed new interface from Jens Axboe called "io_uring". As might be expected from the name, io_uring introduces just what the kernel needed more than anything else: yet another ring buffer.
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Google Summer of Code mentor projects sought

수, 2019/01/16 - 8:07오전
It is that time of year again: Google is looking for mentor projects for the 2019 Summer of Code. "GSoC is a global program that draws university student developers from around the world to contribute to open source. Each student spends three months working on a coding project, with the support of volunteer mentors, for participating open source organizations from late May to August. Last year 1,264 students worked with 206 open source organizations." The application deadline is February 6.
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[$] Fedora, UUIDs, and user tracking

수, 2019/01/16 - 2:23오전

"User tracking" is generally contentious in free-software communities—even if the "tracking" is not really intended to do so. It is often distributions that have the most interest in counting their users, but Linux users tend to be more privacy conscious than users of more mainstream desktop operating systems. The Fedora project recently discussed how to count its users and ways to preserve their privacy while doing so.

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Security updates for Tuesday

수, 2019/01/16 - 1:17오전
Security updates have been issued by Arch Linux (irssi and systemd), CentOS (systemd), Debian (xen and zeromq3), Fedora (gnutls, kernel, kernel-headers, kernel-tools, and nbdkit), Oracle (libvncserver and systemd), Red Hat (libvncserver), and Ubuntu (haproxy, libarchive, and php-pear).
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An ancient OpenSSH vulnerability

수, 2019/01/16 - 12:35오전
An advisory from Harry Sintonen describes several vulnerabilities in the scp clients shipped with OpenSSH, PuTTY, and others. "Many scp clients fail to verify if the objects returned by the scp server match those it asked for. This issue dates back to 1983 and rcp, on which scp is based. A separate flaw in the client allows the target directory attributes to be changed arbitrarily. Finally, two vulnerabilities in clients may allow server to spoof the client output." The outcome is that a hostile (or compromised) server can overwrite arbitrary files on the client side. There do not yet appear to be patches available to address these problems.
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