ext4_journal: initialize block tag with 0 before writing to it.

diff --git a/lwext4/ext4_journal.c b/lwext4/ext4_journal.c
index 6f0cf5c52dbe6041a1e0d6e0ac0afc186b71a32f..e9171296412d2857440e4e8247cb3470a314c6dd 100644 (file)
--- a/lwext4/ext4_journal.c
+++ b/lwext4/ext4_journal.c
@@ -460,6 +460,7 @@ jbd_write_block_tag(struct jbd_fs *jbd_fs,
        if (JBD_HAS_INCOMPAT_FEATURE(&jbd_fs->sb,
                                     JBD_FEATURE_INCOMPAT_CSUM_V3)) {
                struct jbd_block_tag3 *tag = __tag;
+               memset(tag, 0, sizeof(struct jbd_block_tag3));
                jbd_set32(tag, blocknr, tag_info->block);
                if (JBD_HAS_INCOMPAT_FEATURE(&jbd_fs->sb,
                                             JBD_FEATURE_INCOMPAT_64BIT))
@@ -483,6 +484,7 @@ jbd_write_block_tag(struct jbd_fs *jbd_fs,
 
        } else {
                struct jbd_block_tag *tag = __tag;
+               memset(tag, 0, sizeof(struct jbd_block_tag));
                jbd_set32(tag, blocknr, tag_info->block);
                if (JBD_HAS_INCOMPAT_FEATURE(&jbd_fs->sb,
                                             JBD_FEATURE_INCOMPAT_64BIT))