[Bugs] [Bug 1399134] GlusterFS client crashes during remove-brick operation

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1399134



--- Comment #6 from Worker Ant <bugzilla-bot at gluster.org> ---
COMMIT: http://review.gluster.org/15945 committed in master by Shyamsundar
Ranganathan (srangana at redhat.com) 
------
commit 64451d0f25e7cc7aafc1b6589122648281e4310a
Author: Raghavendra G <rgowdapp at redhat.com>
Date:   Tue Nov 8 12:09:57 2016 +0530

    cluster/dht: Fix memory corruption while accessing regex stored in
    private

    If reconfigure is executed parallely (or concurrently with dht_init),
    there are races that can corrupt memory. One such race is modification
    of regexes stored in conf (conf->rsync_regex_valid and
    conf->extra_regex_valid) through dht_init_regex. With change [1],
    reconfigure codepath can get executed parallely (with itself or with
    dht_init) and this fix is needed.

    Also, a reconfigure can race with any thread doing dht_layout_search,
    resulting in dht_layout_search accessing regex freed up by reconfigure
    (like in bz 1399134).

    [1] http://review.gluster.org/15046

    Change-Id: I039422a65374cf0ccbe0073441f0e8c442ebf830
    BUG: 1399134
    Signed-off-by: Raghavendra G <rgowdapp at redhat.com>
    Reviewed-on: http://review.gluster.org/15945
    Smoke: Gluster Build System <jenkins at build.gluster.org>
    NetBSD-regression: NetBSD Build System <jenkins at build.gluster.org>
    Reviewed-by: N Balachandran <nbalacha at redhat.com>
    CentOS-regression: Gluster Build System <jenkins at build.gluster.org>
    Reviewed-by: Shyamsundar Ranganathan <srangana at redhat.com>

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