Commit bf9216f9 authored Apr 03, 2017 by Darrick J. Wong

xfs: fix kernel memory exposure problems



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.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>

parent 3dd09d5a

fs/xfs/xfs_itable.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -583,7 +583,7 @@ 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;