resize2fs: use ext2fs_get_arrayzero() instead of ext2fs_get_array() + memset()

The use of ext2fs_get_arrayzero() to replace using ext2fs_get_array()
+ memset() does not result in any functional change, but it (a) is
slightly more efficient, and (b) makes it easier for Coverity to avoid
signalling a false positive.

Addresses-Coverity-Bug: 1500763
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/resize/extent.c b/resize/extent.c
index 4177c6f..82f69ca 100644 (file)
--- a/resize/extent.c
+++ b/resize/extent.c
@@ -50,14 +50,12 @@ errcode_t ext2fs_create_extent_table(ext2_extent *ret_extent, __u64 size)
        extent->num = 0;
        extent->sorted = 1;
 
-       retval = ext2fs_get_array(sizeof(struct ext2_extent_entry),
+       retval = ext2fs_get_arrayzero(sizeof(struct ext2_extent_entry),
                                extent->size, &extent->list);
        if (retval) {
                ext2fs_free_mem(&extent);
                return retval;
        }
-       memset(extent->list, 0,
-              sizeof(struct ext2_extent_entry) * extent->size);
        *ret_extent = extent;
        return 0;
 }