[PATCH v2] libxfs: don't write uninitialized heap contents into new directory blocks

["Darrick J. Wong" <darrick.wong@xxxxxxxxxx>]

Clear the contents of the xfs buffer when we're initializing it to avoid
writing random heap contents (and CRC thereof) to disk.

Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
 libxfs/rdwr.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/libxfs/rdwr.c b/libxfs/rdwr.c
index 7d73477..35fb366 100644
--- a/libxfs/rdwr.c
+++ b/libxfs/rdwr.c
@@ -411,6 +411,7 @@ __initbuf(xfs_buf_t *bp, struct xfs_buftarg *btp, 
xfs_daddr_t bno,
                        strerror(errno));
                exit(1);
        }
+       memset(bp->b_addr, 0, bytes);
 #ifdef XFS_BUF_TRACING
        list_head_init(&bp->b_lock_list);
 #endif