source: avoid null pointer access in uc_source_runpath_set()

When loading a precompiled program from stdin, the input source runpath
is unset which subsequently leads to a null pointer being passed to
uc_source_runpath_set() when will then attempt to strdup() it, leading
to a null pointer access.

Properly handle this case and only duplicate non-null pointers.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

1 files changed, 1 insertions, 1 deletions

diff --git a/source.c b/source.c
index 902ad4c..3bdc210 100644
--- a/source.c
+++ b/source.c
@@ -194,7 +194,7 @@ uc_source_runpath_set(uc_source_t *source, const char *runpath)
 	if (source->runpath != source->filename)
 		free(source->runpath);
 
-	source->runpath = xstrdup(runpath);
+	source->runpath = runpath ? xstrdup(runpath) : NULL;
 }
 
 bool