Patch "xfs: fix kernel memory exposure problems" has been added to the 4.9-stable tree

This is a note to let you know that I've just added the patch titled

xfs: fix kernel memory exposure problems

to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
xfs-fix-kernel-memory-exposure-problems.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: "Darrick J. Wong" <[email protected]>
Date: Mon, 3 Apr 2017 12:22:39 -0700
Subject: xfs: fix kernel memory exposure problems

From: Darrick J. Wong <[email protected]>

commit bf9216f922612d2db7666aae01e65064da2ffb3a upstream.

Fix a memory exposure problems in inumbers where we allocate an array of structures with holes, fail to zero the holes, then blindly copy the kernel memory contents (junk and all) into userspace.

---
 fs/xfs/xfs_itable.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -585,7 +585,7 @@ xfs_inumbers(
 		return error;
 
 	bcount = MIN(left, (int)(PAGE_SIZE / sizeof(*buffer)));
-	buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP);
+	buffer = kmem_zalloc(bcount * sizeof(*buffer), KM_SLEEP);
 	do {
 		struct xfs_inobt_rec_incore	r;
 		int				stat;

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/xfs-fix-missed-holes-in-seek_hole-implementation.patch queue-4.9/xfs-fix-off-by-one-on-max-nr_pages-in-xfs_find_get_desired_pgoff.patch queue-4.9/xfs-use-dedicated-log-worker-wq-to-avoid-deadlock-with-cil-wq.patch queue-4.9/xfs-rework-the-inline-directory-verifiers.patch queue-4.9/xfs-use-b_state-to-fix-buffer-i-o-accounting-release-race.patch queue-4.9/xfs-verify-inline-directory-data-forks.patch queue-4.9/xfs-fix-kernel-memory-exposure-problems.patch