[Xen-devel] [PATCH 1/3] libxl: use libxl__read_xenstore_check in vtpm function

[Wei Liu <wei.liu2@xxxxxxxxxx>]

libxl__read_xenstore can return NULL. Use the _checked variant to
return early when the read fails.

Coverity-ID: 1418098

Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
---
 tools/libxl/libxl_vtpm.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/libxl/libxl_vtpm.c b/tools/libxl/libxl_vtpm.c
index 21320870d4..bdbeb1b53b 100644
--- a/tools/libxl/libxl_vtpm.c
+++ b/tools/libxl/libxl_vtpm.c
@@ -79,12 +79,14 @@ static int libxl__vtpm_from_xenstore(libxl__gc *gc, const 
char *libxl_path,
                                      libxl_device_vtpm *vtpm)
 {
     int rc;
-    char *be_path;
+    const char *be_path;
     char *uuid;
 
     vtpm->devid = devid;
 
-    be_path = libxl__xs_read(gc, XBT_NULL, GCSPRINTF("%s/backend", 
libxl_path));
+    rc = libxl__xs_read_checked(gc, XBT_NULL,
+                                GCSPRINTF("%s/backend", libxl_path), &be_path);
+    if (rc) return rc;
 
     rc = libxl__backendpath_parse_domid(gc, be_path, &vtpm->backend_domid);
     if (rc) return rc;
-- 
2.11.0


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
https://lists.xen.org/xen-devel