[PATCH] xfs: fix stack contents leakage in the v1 bulkstat/inumbers ioctls

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

From: Darrick J. Wong <darrick.wong@oracle.com>

Explicitly initialize the onstack structures to zero so we don't leak
kernel memory into userspace when converting the in-core structure to
the v1 ioctl structure.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
 fs/xfs/xfs_ioctl.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index f193f7b288ca..44e1a290f053 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -719,7 +719,7 @@ xfs_fsbulkstat_one_fmt(
 	struct xfs_ibulk		*breq,
 	const struct xfs_bulkstat	*bstat)
 {
-	struct xfs_bstat		bs1;
+	struct xfs_bstat		bs1 = { 0 };
 
 	xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat);
 	if (copy_to_user(breq->ubuffer, &bs1, sizeof(bs1)))
@@ -732,7 +732,7 @@ xfs_fsinumbers_fmt(
 	struct xfs_ibulk		*breq,
 	const struct xfs_inumbers	*igrp)
 {
-	struct xfs_inogrp		ig1;
+	struct xfs_inogrp		ig1 = { 0 };
 
 	xfs_inumbers_to_inogrp(&ig1, igrp);
 	if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp)))