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Alan Somers d9fa2d67eb Fix panic during lagg destruction with simultaneous status check
If you run "ifconfig lagg0 destroy" and "ifconfig lagg0" at the same time a
page fault may result. The first process will destroy ifp->if_lagg in
lagg_clone_destroy (called by if_clone_destroy). Then the second process
will observe that ifp->if_lagg is NULL at the top of lagg_port_ioctl and
goto fallback: where it will promptly dereference ifp->if_lagg anyway.

The solution is to repeat the NULL check for ifp->if_lagg

MFC after:	4 weeks
Sponsored by:	Spectra Logic Corp
Differential Revision:	https://reviews.freebsd.org/D8512
2016-12-16 22:39:30 +00:00
bin Fix ls_tests:o_flag with ZFS TMPDIR 2016-12-15 16:13:52 +00:00
cddl Skip a ustack test that triggers an assertion on INVARIANTS kernels. 2016-12-14 19:01:43 +00:00
contrib dma-mbox-create: Restrict with Capsicum 2016-12-16 01:48:55 +00:00
crypto MFV r308196: 2016-11-02 06:49:25 +00:00
etc Add support for encrypted kernel crash dumps. 2016-12-10 16:20:39 +00:00
gnu Add WITH_LLD_AS_LD build knob 2016-11-25 13:15:28 +00:00
include hyperv: Allow userland to ro-mmap reference TSC page 2016-12-15 03:32:24 +00:00
kerberos5 DIRDEPS_BUILD: Update dependencies 2016-06-14 16:55:05 +00:00
lib vfprintf(3): Add support for kernel %b format 2016-12-16 01:44:50 +00:00
libexec Fix typo. 2016-12-16 14:23:08 +00:00
release - Resize FreeBSD to the size of the OpenStack flavor (growfs). 2016-12-14 03:01:15 +00:00
rescue DIRDEPS_BUILD: Update dependencies. 2016-11-13 00:11:30 +00:00
sbin Add a free_iovec() function to reset iovec's. 2016-12-14 21:26:43 +00:00
secure Prefer ACFLAGS over CFLAGS for compiling aarch64 assembly files. 2016-10-26 20:12:30 +00:00
share Add adamw, feld and rene to the portmgr organization 2016-12-14 20:53:46 +00:00
sys Fix panic during lagg destruction with simultaneous status check 2016-12-16 22:39:30 +00:00
targets Merge ^/head r308491 through r308841. 2016-11-19 16:05:55 +00:00
tests reaper: Make REAPER_KILL_SUBTREE actually work. 2016-12-14 22:49:20 +00:00
tools Add WITH_REPRODUCIBLE_BUILD src.conf(5) knob to disable kernel metadata 2016-12-15 21:26:58 +00:00
usr.bin ident(1): Capsicumify 2016-12-16 02:09:48 +00:00
usr.sbin Avoid division by zero in the rare case that portsnap needs to fetch 2016-12-16 22:37:16 +00:00
.arcconfig callsign isn't required anymore 2016-09-29 06:19:45 +00:00
.arclint phabricator related changes: 2015-04-20 20:33:22 +00:00
COPYRIGHT Bump copyright year. 2015-12-31 11:21:45 +00:00
LOCKS
MAINTAINERS Remove myself from kern_timeout.c yeah! 2016-07-27 20:37:32 +00:00
Makefile Add full softfloat and hardfloat support for RISC-V. 2016-11-16 15:21:32 +00:00
Makefile.inc1 Now that external gcc directly natively links to libc++ we can remove 2016-12-10 18:29:39 +00:00
Makefile.libcompat Fix in-tree GCC builds after r304681. 2016-08-23 19:29:37 +00:00
ObsoleteFiles.inc retain cc.4.gz man page for Chelsio T6 NICs 2016-12-16 17:44:56 +00:00
README README: remove nonexistent 'games' directory. 2016-05-18 10:43:13 +00:00
UPDATING Add UPDATING entry for clang/llvm 3.9.0 import. 2016-11-24 22:18:55 +00:00

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

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)
and http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html
for more information, including setting make(1) variables.

The `buildkernel` and `installkernel` targets build and install
the kernel and the modules (see below).  Please see the top of
the Makefile in this directory for more information on the
standard build targets and compile-time flags.

Building a kernel is a somewhat more involved process.  See build(7), config(8),
and http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html
for more information.

Note: If you want to build and install the kernel with the
`buildkernel` and `installkernel` targets, you might need to build
world before.  More information is available in the handbook.

The kernel configuration files reside in the sys/<arch>/conf
sub-directory.  GENERIC is the default configuration used in release builds.
NOTES contains entries and documentation for all possible
devices, not just those commonly used.


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.

sys		Kernel sources.

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:

  http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/synching.html