Add elfutils-0.174-size-rec-ar.patch

CVE-2018-18520 (#1646478)

elfutils-0.174-size-rec-ar.patch

@@ -0,0 +1,31 @@
+commit 22d2d082d57a7470fadc0eae67179553f4919209
+Author: Mark Wielaard <mark@klomp.org>
+Date:   Thu Oct 18 23:15:48 2018 +0200
+
+    size: Handle recursive ELF ar files.
+    
+    eu-size didn't handle an ELF ar file that contained an ar file itself
+    correctly. handle_ar would recursively call itself but close the ELF
+    file before returning. Only close the ELF file at the top-level.
+    
+    https://sourceware.org/bugzilla/show_bug.cgi?id=23787
+    
+    Signed-off-by: Mark Wielaard <mark@klomp.org>
+
+diff --git a/src/size.c b/src/size.c
+index 5ff3f2a..f01fd88 100644
+--- a/src/size.c
++++ b/src/size.c
+@@ -374,8 +374,10 @@ handle_ar (int fd, Elf *elf, const char *prefix, const char *fname)
+ 	INTERNAL_ERROR (fname);
+     }
+ 
+-  if (unlikely (elf_end (elf) != 0))
+-    INTERNAL_ERROR (fname);
++  /* Only close ELF handle if this was a "top level" ar file.  */
++  if (prefix == NULL)
++    if (unlikely (elf_end (elf) != 0))
++      INTERNAL_ERROR (fname);
+ 
+   return result;
+ }

elfutils.spec

@@ -23,6 +23,7 @@ Source: %{?source_url}%{name}-%{version}.tar.bz2
 Patch1: elfutils-0.173-new-notes-hack.patch
 Patch2: elfutils-0.174-strip-unstrip-group.patch
 Patch3: elfutils-0.174-libdwfl-sanity-check-core-reads.patch
+Patch4: elfutils-0.174-size-rec-ar.patch
 
 Requires: elfutils-libelf%{depsuffix} = %{version}-%{release}
 Requires: elfutils-libs%{depsuffix} = %{version}-%{release}
@@ -194,6 +195,7 @@ profiling) of processes.
 %patch1 -p1 -b .notes_hack
 %patch2 -p1 -b .strip_unstrip_group
 %patch3 -p1 -b .sanity_check_core_reads
+%patch4 -p1 -b .size_rec_ar
 
 # In case the above patches added any new test scripts, make sure they
 # are executable.
@@ -326,6 +328,10 @@ fi
 %endif
 
 %changelog
+* Tue Nov  6 2018 Mark Wielaard <mjw@fedoraproject.org>
+- Add elfutils-0.174-size-rec-ar.patch
+  CVE-2018-18520 (#1646478)
+
 * Fri Nov  2 2018 Mark Wielaard <mjw@fedoraproject.org> - 0.174-3
 - Add elfutils-0.174-libdwfl-sanity-check-core-reads.patch
   CVE-2018-18310 (#1642605)