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Add NEWS for 5.2.6.
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Lasse Collin
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NEWS
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NEWS
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@ -2,6 +2,232 @@
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XZ Utils Release Notes
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======================
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5.2.6 (2022-08-12)
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* xz:
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- The --keep option now accepts symlinks, hardlinks, and
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setuid, setgid, and sticky files. Previously this required
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using --force.
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- When copying metadata from the source file to the destination
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file, don't try to set the group (GID) if it is already set
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correctly. This avoids a failure on OpenBSD (and possibly on
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a few other OSes) where files may get created so that their
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group doesn't belong to the user, and fchown(2) can fail even
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if it needs to do nothing.
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- Cap --memlimit-compress to 2000 MiB instead of 4020 MiB on
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MIPS32 because on MIPS32 userspace processes are limited
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to 2 GiB of address space.
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* liblzma:
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- Fixed a missing error-check in the threaded encoder. If a
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small memory allocation fails, a .xz file with an invalid
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Index field would be created. Decompressing such a file would
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produce the correct output but result in an error at the end.
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Thus this is a "mild" data corruption bug. Note that while
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a failed memory allocation can trigger the bug, it cannot
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cause invalid memory access.
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- The decoder for .lzma files now supports files that have
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uncompressed size stored in the header and still use the
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end of payload marker (end of stream marker) at the end
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of the LZMA stream. Such files are rare but, according to
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the documentation in LZMA SDK, they are valid.
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doc/lzma-file-format.txt was updated too.
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- Improved 32-bit x86 assembly files:
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* Support Intel Control-flow Enforcement Technology (CET)
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* Use non-executable stack on FreeBSD.
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- Visual Studio: Use non-standard _MSVC_LANG to detect C++
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standard version in the lzma.h API header. It's used to
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detect when "noexcept" can be used.
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* xzgrep:
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- Fixed arbitrary command injection via a malicious filename
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(CVE-2022-1271, ZDI-CAN-16587). A standalone patch for
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this was released to the public on 2022-04-07. A slight
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robustness improvement has been made since then and, if
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using GNU or *BSD grep, a new faster method is now used
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that doesn't use the old sed-based construct at all. This
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also fixes bad output with GNU grep >= 3.5 (2020-09-27)
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when xzgrepping binary files.
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This vulnerability was discovered by:
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cleemy desu wayo working with Trend Micro Zero Day Initiative
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- Fixed detection of corrupt .bz2 files.
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- Improved error handling to fix exit status in some situations
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and to fix handling of signals: in some situations a signal
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didn't make xzgrep exit when it clearly should have. It's
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possible that the signal handling still isn't quite perfect
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but hopefully it's good enough.
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- Documented exit statuses on the man page.
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- xzegrep and xzfgrep now use "grep -E" and "grep -F" instead
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of the deprecated egrep and fgrep commands.
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- Fixed parsing of the options -E, -F, -G, -P, and -X. The
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problem occurred when multiple options were specied in
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a single argument, for example,
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echo foo | xzgrep -Fe foo
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treated foo as a filename because -Fe wasn't correctly
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split into -F -e.
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- Added zstd support.
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* xzdiff/xzcmp:
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- Fixed wrong exit status. Exit status could be 2 when the
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correct value is 1.
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- Documented on the man page that exit status of 2 is used
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for decompression errors.
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- Added zstd support.
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* xzless:
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- Fix less(1) version detection. It failed if the version number
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from "less -V" contained a dot.
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* Translations:
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- Added new translations: Catalan, Croatian, Esperanto,
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Korean, Portuguese, Romanian, Serbian, Spanish, Swedish,
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and Ukrainian
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- Updated the Brazilian Portuguese translation.
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- Added French man page translation. This and the existing
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German translation aren't complete anymore because the
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English man pages got a few updates and the translators
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weren't reached so that they could update their work.
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* Build systems:
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- Windows: Fix building of resource files when config.h isn't
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used. CMake + Visual Studio can now build liblzma.dll.
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- Various fixes to the CMake support. Building static or shared
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liblzma should work fine in most cases. In contrast, building
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the command line tools with CMake is still clearly incomplete
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and experimental and should be used for testing only.
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5.2.5 (2020-03-17)
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* liblzma:
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- Fixed several C99/C11 conformance bugs. Now the code is clean
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under gcc/clang -fsanitize=undefined. Some of these changes
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might have a negative effect on performance with old GCC
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versions or compilers other than GCC and Clang. The configure
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option --enable-unsafe-type-punning can be used to (mostly)
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restore the old behavior but it shouldn't normally be used.
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- Improved API documentation of lzma_properties_decode().
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- Added a very minor encoder speed optimization.
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* xz:
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- Fixed a crash in "xz -dcfv not_an_xz_file". All four options
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were required to trigger it. The crash occurred in the
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progress indicator code when xz was in passthru mode where
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xz works like "cat".
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- Fixed an integer overflow with 32-bit off_t. It could happen
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when decompressing a file that has a long run of zero bytes
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which xz would try to write as a sparse file. Since the build
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system enables large file support by default, off_t is
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normally 64-bit even on 32-bit systems.
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- Fixes for --flush-timeout:
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* Fix semi-busy-waiting.
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* Avoid unneeded flushes when no new input has arrived
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since the previous flush was completed.
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- Added a special case for 32-bit xz: If --memlimit-compress is
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used to specify a limit that exceeds 4020 MiB, the limit will
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be set to 4020 MiB. The values "0" and "max" aren't affected
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by this and neither is decompression. This hack can be
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helpful when a 32-bit xz has access to 4 GiB address space
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but the specified memlimit exceeds 4 GiB. This can happen
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e.g. with some scripts.
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- Capsicum sandbox is now enabled by default where available
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(FreeBSD >= 10). The sandbox debug messages (xz -vv) were
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removed since they seemed to be more annoying than useful.
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- DOS build now requires DJGPP 2.05 instead of 2.04beta.
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A workaround for a locale problem with DJGPP 2.05 was added.
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* xzgrep and other scripts:
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- Added a configure option --enable-path-for-scripts=PREFIX.
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It is disabled by default except on Solaris where the default
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is /usr/xpg4/bin. See INSTALL for details.
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- Added a workaround for a POSIX shell detection problem on
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Solaris.
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* Build systems:
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- Added preliminary build instructions for z/OS. See INSTALL
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section 1.2.9.
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- Experimental CMake support was added. It should work to build
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static liblzma on a few operating systems. It may or may not
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work to build shared liblzma. On some platforms it can build
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xz and xzdec too but those are only for testing. See the
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comment in the beginning of CMakeLists.txt for details.
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- Visual Studio project files were updated.
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WindowsTargetPlatformVersion was removed from VS2017 files
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and set to "10.0" in the added VS2019 files. In the future
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the VS project files will be removed when CMake support is
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good enough.
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- New #defines in config.h: HAVE___BUILTIN_ASSUME_ALIGNED,
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HAVE___BUILTIN_BSWAPXX, and TUKLIB_USE_UNSAFE_TYPE_PUNNING.
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- autogen.sh has a new optional dependency on po4a and a new
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option --no-po4a to skip that step. This matters only if one
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wants to remake the build files. po4a is used to update the
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translated man pages but as long as the man pages haven't
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been modified, there's nothing to update and one can use
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--no-po4a to avoid the dependency on po4a.
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* Translations:
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- XZ Utils translations are now handled by the Translation
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Project: https://translationproject.org/domain/xz.html
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- All man pages are now included in German too.
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- New xz translations: Brazilian Portuguese, Finnish,
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Hungarian, Chinese (simplified), Chinese (traditional),
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and Danish (partial translation)
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- Updated xz translations: French, German, Italian, and Polish
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- Unfortunately a few new xz translations weren't included due
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to technical problems like too long lines in --help output or
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misaligned column headings in tables. In the future, many of
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these strings will be split and e.g. the table column
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alignment will be handled in software. This should make the
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strings easier to translate.
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5.2.5 (2020-03-17)
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* liblzma:
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