[Bug binutils/25873] New: ar segfaults when liblto_plugin.so.0.0.0 is a symlink in /usr/lib/bfd-plugins

[tstellar at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=25873

            Bug ID: 25873
           Summary: ar segfaults when liblto_plugin.so.0.0.0 is a symlink
                    in /usr/lib/bfd-plugins
           Product: binutils
           Version: 2.34
            Status: NEW
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: tstellar at redhat dot com
  Target Milestone: ---

ar segfaults when using a plugin from /usr/lib/bfd-plugins that is a symlink. 
Here is how to reproduce:

echo "int foo(){}" | gcc -flto -O2 -c -x c -o foo.o -
echo "int bar(){}" | gcc -flto -O2 -c -x c -o bar.o -
ln -s /usr/libexec/gcc/x86_64-redhat-linux/10/liblto_plugin.so.0.0.0
/usr/lib/bfd-plugins/
ar crs foo.a foo.o bar.o
Segmentation fault (core dumped)


If the plugin is copied directly and not a symlink, then there is no segfault:


rm /usr/lib/bfd-plugins/liblto_plugin.so.0.0.0 
cp /usr/libexec/gcc/x86_64-redhat-linux/10/liblto_plugin.so.0.0.0
/usr/lib/bfd-plugins/
ar crs foo.a foo.o bar.o

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