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Description of problem:
The Red Hat distro RPM config defines various hardening flags that all binaries in RHEL should be built with

# rpmbuild  --eval '%{optflags}'
-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches   -m64 -mtune=generic

# rpmbuild  --eval '%{__global_ldflags}'
-Wl,-z,relro 

The ksmctl binary is being built without honouring these flags:

eg the qemu-kvm.spec just runs:

  gcc %{SOURCE6} -O2 -g -o ksmctl


This needs to be made to honour the hardenin flags by using

  gcc %{SOURCE6} $RPM_OPT_FLAGS $RPM_LD_FLAGS -o ksmctl

Also note that earlier in the specfile, it cull FORTIFY_SOURCE=2 from the %{optflags}:


# QEMU already knows how to set _FORTIFY_SOURCE
%global optflags %(echo %{optflags} | sed 's/-Wp,-D_FORTIFY_SOURCE=2//')


this needs to be removed, so that the ksm build still sees _FORTIFY_SOURCE

Version-Release number of selected component (if applicable):
qemu-kvm-rhev-2.10.0-21.el7

If needed, please clone for qemu-kvm-ma.

Fix included in qemu-kvm-rhev-2.12.0-3.el7

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:3443