ceph_test_librbd: fix heap overrunwip-test-librbd

We are storing rbd_snap_info_t structs, not pointers to them.  But we
can also avoid the heap entirely.

This crashed pretty reliably on arm.

Signed-off-by: Sage Weil <sage@inktank.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/src/test/librbd/test_librbd.cc b/src/test/librbd/test_librbd.cc
index 8052d25d6e1..67650a4edd1 100644
--- a/src/test/librbd/test_librbd.cc
+++ b/src/test/librbd/test_librbd.cc
@@ -435,7 +435,7 @@ int test_ls_snaps(rbd_image_t image, int num_expected, ...)
   rbd_snap_info_t *snaps;
   int num_snaps, i, j, max_size = 10;
   va_list ap;
-  snaps = (rbd_snap_info_t *) malloc(sizeof(rbd_snap_info_t *) * max_size);
+  rbd_snap_info_t snaps[max_size];
   num_snaps = rbd_snap_list(image, snaps, &max_size);
   printf("num snaps is: %d\nexpected: %d\n", num_snaps, num_expected);
 
@@ -467,7 +467,6 @@ int test_ls_snaps(rbd_image_t image, int num_expected, ...)
   for (i = 0; i < num_snaps; i++) {
     assert(snaps[i].name == NULL);
   }
-  free(snaps);
 
   return num_snaps;
 }