libcephfs: Check that buffer is non-null

Signed-off-by: Sam Lang <sam.lang@inktank.com>

diff --git a/src/libcephfs.cc b/src/libcephfs.cc
index 3c9feb0f67a94c035624b8d84cce0d98b9efba8f..f4e4ad0b03efa874922057d4fe622fb422d69809 100644 (file)
--- a/src/libcephfs.cc
+++ b/src/libcephfs.cc
@@ -256,6 +256,9 @@ extern "C" int ceph_conf_set(struct ceph_mount_info *cmount, const char *option,
 extern "C" int ceph_conf_get(struct ceph_mount_info *cmount, const char *option,
                             char *buf, size_t len)
 {
+  if (buf == NULL) {
+    return -EINVAL;
+  }
   return cmount->conf_get(option, buf, len);
 }