This release features the new "mallocng" malloc implementation, replacing musl's original dlmalloc-like allocator that suffered from fundamental design problems. Its major user-facing new properties are the ability to return freed memory on a much finer granularity and avoidance of many catastrophic fragmentation patterns. In addition it provides strong hardening against memory usage errors by the caller, including detection of overflows, double-free, and use-after-free, and does not admit corruption of allocator state via these errors.
Other enhancements in this release include changes to the res_*
API to report DNSSEC status of the results (needed for correct implementation of DANE in applications) and new arch-specific optimized string and math functions, especially memcpy
and memset
for AAarch64.
A major logic/synchronization error in lock skipping after a multi-threaded process returns to single-threaded state has been fixed, along with a number of lesser bugs, including some time64-related regressions on 32-bit archs. One of these was actually a kernel vdso bug that broke clock_gettime
on arm on hardware where the vdso should not be used; as a result, arm vdso support has been disabled until there is a reliable and inexpensive way to detect whether it's safe to use. Bugs and recent regressions affecting all mips archs and other arch-specific bugs have also been fixed.
Updates may require up to 24 hours to propagate to mirrors. If the following command doesn't work, please retry later:
sudo dnf upgrade --refresh --advisory=FEDORA-2020-ed0f9461be
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This update has been submitted for testing by ngompa.
This update's test gating status has been changed to 'ignored'.
This update's test gating status has been changed to 'waiting'.
This update's test gating status has been changed to 'ignored'.
This update has been pushed to testing.
This update has been submitted for stable by bodhi.
This update has been pushed to stable.