release: Add security/export checks to gitian and fix current failures

- fix parsing of BIND_NOW with older readelf
- add _IO_stdin_used to ignored exports

For details see: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=634261#109

- add check-symbols and check-security make targets

These are not added to the default checks because some of them depend on
release-build configs.

- always link librt for glibc back-compat builds

glibc absorbed clock_gettime in 2.17. librt (its previous location) is safe to
link in anyway for back-compat.

Fixes #7420

- add security/symbol checks to gitian

Github-Pull: #7424
Rebased-From: cd27bf51e06a8d79790a631696355bd05751b0aa 475813ba5b208eb9a5d027eb628a717cc123ef4f f3d3eaf78eb51238d799d8f20a585550d1567719 a8ce872118c4807465629aecb9e4f3d72d999ccb a81c87fafce43e49cc2307947e3951b84be7ca9a

4 files changed, 8 insertions, 2 deletions

diff --git a/contrib/devtools/security-check.py b/contrib/devtools/security-check.py
index e96eaa9c38..01586457db 100755
--- a/contrib/devtools/security-check.py
+++ b/contrib/devtools/security-check.py
@@ -94,7 +94,7 @@ def check_ELF_RELRO(executable):
         raise IOError('Error opening file')
     for line in stdout.split('\n'):
         tokens = line.split()
-        if len(tokens)>1 and tokens[1] == '(BIND_NOW)':
+        if len(tokens)>1 and tokens[1] == '(BIND_NOW)' or (len(tokens)>2 and tokens[1] == '(FLAGS)' and 'BIND_NOW' in tokens[2]):
             have_bindnow = True
     return have_gnu_relro and have_bindnow
 
diff --git a/contrib/devtools/symbol-check.py b/contrib/devtools/symbol-check.py
index 93acfcdda4..4ad5136f79 100755
--- a/contrib/devtools/symbol-check.py
+++ b/contrib/devtools/symbol-check.py
@@ -42,9 +42,12 @@ MAX_VERSIONS = {
 'GLIBCXX': (3,4,13),
 'GLIBC':   (2,11)
 }
+# See here for a description of _IO_stdin_used:
+# https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=634261#109
+
 # Ignore symbols that are exported as part of every executable
 IGNORE_EXPORTS = {
-'_edata', '_end', '_init', '__bss_start', '_fini'
+'_edata', '_end', '_init', '__bss_start', '_fini', '_IO_stdin_used'
 }
 READELF_CMD = os.getenv('READELF', '/usr/bin/readelf')
 CPPFILT_CMD = os.getenv('CPPFILT', '/usr/bin/c++filt')
diff --git a/contrib/gitian-descriptors/gitian-linux.yml b/contrib/gitian-descriptors/gitian-linux.yml
index d13ae8b10c..d034a91303 100644
--- a/contrib/gitian-descriptors/gitian-linux.yml
+++ b/contrib/gitian-descriptors/gitian-linux.yml
@@ -96,6 +96,8 @@ script: |
 
     ./configure --prefix=${BASEPREFIX}/${i} --bindir=${INSTALLPATH}/bin --includedir=${INSTALLPATH}/include --libdir=${INSTALLPATH}/lib --disable-ccache --disable-maintainer-mode --disable-dependency-tracking ${CONFIGFLAGS}
     make ${MAKEOPTS}
+    make ${MAKEOPTS} -C src check-security
+    make ${MAKEOPTS} -C src check-symbols
     make install-strip
     cd installed
     find . -name "lib*.la" -delete
diff --git a/contrib/gitian-descriptors/gitian-win.yml b/contrib/gitian-descriptors/gitian-win.yml
index 66077e0d5b..bcc6c4629e 100644
--- a/contrib/gitian-descriptors/gitian-win.yml
+++ b/contrib/gitian-descriptors/gitian-win.yml
@@ -126,6 +126,7 @@ script: |
 
     ./configure --prefix=${BASEPREFIX}/${i} --bindir=${INSTALLPATH}/bin --includedir=${INSTALLPATH}/include --libdir=${INSTALLPATH}/lib --disable-ccache --disable-maintainer-mode --disable-dependency-tracking ${CONFIGFLAGS}
     make ${MAKEOPTS}
+    make ${MAKEOPTS} -C src check-security
     make deploy
     make install-strip
     cp -f bitcoin-*setup*.exe $OUTDIR/