[Xen-devel] [PATCH 1/9] libxl: fix libxl__abs_path

[Wei Liu <wei.liu2@xxxxxxxxxx>]

If s is NULL, just return NULL to avoid libxl__strdup dereferencing NULL
pointer.

Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
---
 tools/libxl/libxl_internal.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/libxl/libxl_internal.c b/tools/libxl/libxl_internal.c
index 42d548e..6402c1b 100644
--- a/tools/libxl/libxl_internal.c
+++ b/tools/libxl/libxl_internal.c
@@ -233,8 +233,8 @@ void libxl__log(libxl_ctx *ctx, xentoollog_level msglevel, 
int errnoval,
 
 char *libxl__abs_path(libxl__gc *gc, const char *s, const char *path)
 {
-    if (!s || s[0] == '/')
-        return libxl__strdup(gc, s);
+    if (!s) return NULL;
+    if (s[0] == '/') return libxl__strdup(gc, s);
     return libxl__sprintf(gc, "%s/%s", path, s);
 }
 
-- 
1.9.1


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