From 7496d5800bb2b06bff1c334af1b4cf1fff51c7ae Mon Sep 17 00:00:00 2001
From: jhendersonHDF <jhenderson@hdfgroup.org>
Date: Mon, 8 Apr 2024 22:17:03 -0500
Subject: [PATCH] Fix use of possibly uninitialized memory in h5repack (#4354)
 (#4355)

---
 tools/src/h5repack/h5repack.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/src/h5repack/h5repack.c b/tools/src/h5repack/h5repack.c
index 6747c25cb30..f571a701771 100644
--- a/tools/src/h5repack/h5repack.c
+++ b/tools/src/h5repack/h5repack.c
@@ -481,7 +481,7 @@ copy_attr(hid_t loc_in, hid_t loc_out, named_dt_t **named_dt_head_p, trav_table_
              *-----------------------------------------------------------------
              */
 
-            buf = (void *)malloc((size_t)(nelmts * msize));
+            buf = (void *)calloc(1, (size_t)(nelmts * msize));
             if (buf == NULL) {
                 H5TOOLS_GOTO_ERROR((-1), "malloc failed");
             } /* end if */