Bug 1558516 - ksmctl is built without any hardening flags set [rhel-7.6]
Summary: ksmctl is built without any hardening flags set [rhel-7.6]
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: qemu-kvm-rhev
Version: 7.5
Hardware: Unspecified
OS: Unspecified
Target Milestone: rc
: ---
Assignee: Miroslav Rezanina
QA Contact: Chao Yang
Depends On:
Blocks: 1558895
TreeView+ depends on / blocked
Reported: 2018-03-20 11:32 UTC by Daniel Berrangé
Modified: 2018-11-01 11:07 UTC (History)
8 users (show)

Fixed In Version: qemu-kvm-rhev-2.12.0-3.el7
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
: 1558520 1558895 (view as bug list)
Last Closed: 2018-11-01 11:07:15 UTC
Target Upstream Version:

Attachments (Terms of Use)

System ID Priority Status Summary Last Updated
Red Hat Bugzilla 1549657 None None None Never

Internal Links: 1549657

Description Daniel Berrangé 2018-03-20 11:32:18 UTC
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}'

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):

Comment 2 Jeff Nelson 2018-03-20 17:50:06 UTC
If needed, please clone for qemu-kvm-ma.

Comment 6 Miroslav Rezanina 2018-06-01 09:00:39 UTC
Fix included in qemu-kvm-rhev-2.12.0-3.el7

Comment 9 errata-xmlrpc 2018-11-01 11:07:15 UTC
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.


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