elf: Check objname before calling fatal_error

_dl_signal_error may be called with objname == NULL.  _dl_exception_create
checks objname == NULL.  But fatal_error doesn't.  Check objname before
calling fatal_error.  This fixes BZ #31596.
Reviewed-by: Sunil K Pandey <skpgkp2@gmail.com>

diff --git a/elf/dl-catch.c b/elf/dl-catch.c
index 2109516dbac7dc898c2bb7c490de80fd35c2dcaa..8ef7a4c7067ace6a4660dd97fb85f03c4738c854 100644 (file)
--- a/elf/dl-catch.c
+++ b/elf/dl-catch.c
@@ -126,7 +126,11 @@ _dl_signal_error (int errcode, const char *objname, const char *occasion,
       __longjmp (lcatch->env[0].__jmpbuf, 1);
     }
   else
-    fatal_error (errcode, objname, occasion, errstring);
+    {
+      if (objname == NULL)
+       objname = "";
+      fatal_error (errcode, objname, occasion, errstring);
+    }
 }
 rtld_hidden_def (_dl_signal_error)