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Mark Johnston 150d384e5c Fix a use-after-free in swp_pager_meta_free().
This was introduced in r326329 and explains the crashes mentioned in
the commit log message for r339934.  In particular, on INVARIANTS
kernels, UMA trashing causes the loop to exit early, leaving swap
blocks behind when they should have been freed.  After r336984 this
became more problematic since new anonymous mappings were more
likely to reuse swapped-out subranges of existing VM objects, so faults
would trigger pageins of freed memory rather than returning zeroed
pages.

Reviewed by:	kib
MFC after:	3 days
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D17897
2018-11-07 23:28:11 +00:00
bin capsicum: use a new capsicum helpers in tools 2018-11-04 19:24:49 +00:00
cddl dtrace(1): remove reference to dtruss that was removed from base 2018-10-31 15:29:26 +00:00
contrib Pick 50b473c8839f5408df179bdf6f2b3fd2cf5c3b2f from upstream: 2018-11-06 12:05:46 +00:00
crypto Update SHLIB_VERSION_NUMBER following the OpenSSL shared library 2018-10-25 18:46:45 +00:00
etc Simplify NLS alias handling by using native make(1) multi variable for loops 2018-11-04 10:14:08 +00:00
gnu Implement a BSD licensed crtbegin/crtend 2018-10-25 17:39:41 +00:00
include Reduce NL_ARGMAX to 4096 to match Linux. 2018-10-04 21:55:58 +00:00
kerberos5 Update the existing heimdal implementation for OpenSSL 1.1. 2018-10-05 16:35:24 +00:00
lib Add the (untested) mips and sparc64 .init call sequences. 2018-11-07 09:49:25 +00:00
libexec Handle the DT_MIPS_RLD_MAP_REL dynamic tag in RTLD 2018-11-07 15:04:41 +00:00
release Pass _BRANCH in the reldoc target to ensure the correct 2018-10-29 21:03:43 +00:00
rescue rescue: Add bectl(8) 2018-10-31 20:42:18 +00:00
sbin Do not print "ip6" keyword in print_icmp6types() for O_ICMP6TYPE opcode. 2018-11-06 07:41:32 +00:00
secure Bump base OpenSSL libraries versions to avoid conflict with port's libraries. 2018-10-25 13:37:57 +00:00
share rc.subr(8): Document when required_* variables are processed 2018-11-07 16:56:32 +00:00
stand loader: ptable_open() check for ptable_cd9660read result is wrong 2018-11-07 21:36:52 +00:00
sys Fix a use-after-free in swp_pager_meta_free(). 2018-11-07 23:28:11 +00:00
targets Add -b/-l options to localedef(1) to specify output endianness and use 2018-10-20 20:51:05 +00:00
tests Vendor import of expat 2.2.6 2018-11-02 22:10:07 +00:00
tools Add benchmarks for lstat(2) and readlink(2). 2018-11-07 11:46:12 +00:00
usr.bin bspatch: simplify capsicumization 2018-11-07 21:01:14 +00:00
usr.sbin Comestic change to try to inline the memset with SSE/AVX instructions. 2018-11-07 06:29:01 +00:00
.arcconfig callsign isn't required anymore 2016-09-29 06:19:45 +00:00
.arclint arc lint: ignore /tests/ in chmod 2017-12-19 03:38:06 +00:00
.gitattributes Remove spuriously added svn properties 2018-08-02 18:37:02 +00:00
.gitignore Ignore _.universe-toolchain file. 2018-07-01 13:50:37 +00:00
COPYRIGHT Remove 'All Rights Reserved' from the collection copyright and templates. 2018-05-09 02:02:49 +00:00
LOCKS LOCKS: update current locks 2018-06-09 03:08:04 +00:00
MAINTAINERS Add pointer to freebsd-numerics for libm. 2018-07-16 15:29:32 +00:00
Makefile Allow building world without inheriting $PATH 2018-11-05 19:51:10 +00:00
Makefile.inc1 Turn off BUILD_WITH_STRICT_TMPPATH by default 2018-11-06 18:06:52 +00:00
Makefile.libcompat libcompat: disable retpoline when building build tools 2018-11-03 19:31:11 +00:00
Makefile.sys.inc AUTO_OBJ: For all top-level targets enforce using an OBJDIR. 2017-12-05 21:29:47 +00:00
ObsoleteFiles.inc revert r340156, restoring sys/sys/capability.h 2018-11-05 22:36:45 +00:00
README Vendor import of expat 2.2.6 2018-11-02 22:10:07 +00:00
README.md Vendor import of expat 2.2.6 2018-11-02 22:10:07 +00:00
UPDATING Add updating entry for DRM 2018-10-20 19:14:46 +00:00

FreeBSD Source:

This is the top level of the FreeBSD source directory. This file was last revised on: FreeBSD

FreeBSD is an operating system used to power modern servers, desktops, and embedded platforms. A large community has continually developed it for more than thirty years. Its advanced networking, security, and storage features have made FreeBSD the platform of choice for many of the busiest web sites and most pervasive embedded networking and storage devices.

For copyright information, please see the file COPYRIGHT in this directory. Additional copyright information also exists for some sources in this tree - please see the specific source directories for more information.

The Makefile in this directory supports a number of targets for building components (or all) of the FreeBSD source tree. See build(7), config(8), https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html, and https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html for more information, including setting make(1) variables.

Source Roadmap:

bin		System/user commands.

cddl		Various commands and libraries under the Common Development
		and Distribution License.

contrib		Packages contributed by 3rd parties.

crypto		Cryptography stuff (see crypto/README).

etc		Template files for /etc.

gnu		Various commands and libraries under the GNU Public License.
		Please see gnu/COPYING* for more information.

include		System include files.

kerberos5	Kerberos5 (Heimdal) package.

lib		System libraries.

libexec		System daemons.

release		Release building Makefile & associated tools.

rescue		Build system for statically linked /rescue utilities.

sbin		System commands.

secure		Cryptographic libraries and commands.

share		Shared resources.

stand		Boot loader sources.

sys		Kernel sources.

sys/<arch>/conf Kernel configuration files. GENERIC is the configuration
		used in release builds. NOTES contains documentation of
		all possible entries.

tests		Regression tests which can be run by Kyua.  See tests/README
		for additional information.

tools		Utilities for regression testing and miscellaneous tasks.

usr.bin		User commands.

usr.sbin	System administration commands.

For information on synchronizing your source tree with one or more of the FreeBSD Project's development branches, please see:

https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/current-stable.html