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-rw-r--r--src/H5L.c2
-rw-r--r--test/links.c6
2 files changed, 8 insertions, 0 deletions
diff --git a/src/H5L.c b/src/H5L.c
index 33e561a..1f45740 100644
--- a/src/H5L.c
+++ b/src/H5L.c
@@ -648,6 +648,8 @@ H5Lcreate_ud(hid_t link_loc_id, const char *link_name, H5L_type_t link_type,
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no link name specified")
if(link_type < H5L_TYPE_UD_MIN || link_type > H5L_TYPE_MAX)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid link class")
+ if(!udata && udata_size)
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "udata cannot be NULL if udata_size is non-zero")
/* Check the group access property list */
if(H5P_DEFAULT == lcpl_id)
diff --git a/test/links.c b/test/links.c
index b09ddb1..520f784 100644
--- a/test/links.c
+++ b/test/links.c
@@ -8823,6 +8823,12 @@ ud_link_errors(hid_t fapl, hbool_t new_format)
TEST_ERROR
} H5E_END_TRY
+ /* Try to create a link with H5Lcreate_ud that has a NULL udata pointer, but a non-zero udata_size value */
+ H5E_BEGIN_TRY {
+ if(H5Lcreate_ud(fid, "/ud_link", (H5L_type_t)UD_CBFAIL_TYPE, NULL, 1, H5P_DEFAULT, H5P_DEFAULT) >= 0)
+ TEST_ERROR
+ } H5E_END_TRY;
+
/* Create a user-defined link to the group. */
strcpy(group_name, "/group");
if(H5Lcreate_ud(fid, "/ud_link", (H5L_type_t)UD_CBFAIL_TYPE, &group_name, HDstrlen(group_name) + 1, H5P_DEFAULT, H5P_DEFAULT) < 0) FAIL_STACK_ERROR