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0dcb882037
HIGHMEM kmap interfaces operate on only a single page at a time yet ZFS hadn't accounted for this, resulting in crashes and potential memory corruption on HIGHMEM (typically 32-bit) systems. This was caught by PaX's KERNSEAL feature as it makes use of HIGHMEM functionality on x64. On typical 64-bit systems, this issue wouldn't have been observed, as the map interfaces simply fall back to returning an address in lowmem where the contiguous pages can be accessed directly. Joint work with the PaX Team, tested by Mark van Dijk Reviewed-by: RageLtMan <rageltman@sempervictus> Reviewed-by: Rob Norris <robn@despairlabs.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: bspengler-oss <94915855+bspengler-oss@users.noreply.github.com> Closes #15668 Closes #18030 |
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OpenZFS is an advanced file system and volume manager which was originally developed for Solaris and is now maintained by the OpenZFS community. This repository contains the code for running OpenZFS on Linux and FreeBSD.
Official Resources
- Documentation - for using and developing this repo
- ZoL Site - Linux release info & links
- Mailing lists
- OpenZFS site - for conference videos and info on other platforms (illumos, OSX, Windows, etc)
Installation
Full documentation for installing OpenZFS on your favorite operating system can be found at the Getting Started Page.
Contribute & Develop
We have a separate document with contribution guidelines.
We have a Code of Conduct.
Release
OpenZFS is released under a CDDL license.
For more details see the NOTICE, LICENSE and COPYRIGHT files; UCRL-CODE-235197
Supported Kernels
- The
METAfile contains the officially recognized supported Linux kernel versions. - Supported FreeBSD versions are any supported branches and releases starting from 13.0-RELEASE.