rpc : build_prog_details should iterate program list inside critical section

Backport of http://review.gluster.org/13428

While I was analyzing a glusterd crash from free_prog_details, a code
walkthrough detects that we iterate over the rpc svc program list without been
inside the criticial section. This opens up a possibility of a crash when there
is a concurrent writer updating the same list. Solution is to read the list
inside lock.

> Reviewed-on: http://review.gluster.org/13428
> Smoke: Gluster Build System <jenkins@build.gluster.com>
> CentOS-regression: Gluster Build System <jenkins@build.gluster.com>
> NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
> Reviewed-by: Niels de Vos <ndevos@redhat.com>
> Reviewed-by: Raghavendra G <rgowdapp@redhat.com>

BUG: 1310970
Change-Id: Ib4b4b0022a9535e139cd3c00574aab23f07aa9d2
Signed-off-by: Atin Mukherjee <amukherj@redhat.com>
Signed-off-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Reviewed-on: http://review.gluster.org/13488
Smoke: Gluster Build System <jenkins@build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Kaushal M <kaushal@redhat.com>

0 files changed, 0 insertions, 0 deletions