[XFS] Fix potential overflow in xfs_iomap_t delta for very large extents

SGI-PV: 945311
SGI-Modid: xfs-linux-melb:xfs-kern:201708a

Signed-off-by: Eric Sandeen <sandeen@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>

diff --git a/fs/xfs/xfs_iomap.h b/fs/xfs/xfs_iomap.h
index fcd6d63..3ce204a 100644 (file)
--- a/fs/xfs/xfs_iomap.h
+++ b/fs/xfs/xfs_iomap.h
@@ -69,7 +69,7 @@ typedef struct xfs_iomap {
        xfs_buftarg_t           *iomap_target;
        xfs_off_t               iomap_offset;   /* offset of mapping, bytes */
        xfs_off_t               iomap_bsize;    /* size of mapping, bytes */
-       size_t                  iomap_delta;    /* offset into mapping, bytes */
+       xfs_off_t               iomap_delta;    /* offset into mapping, bytes */
        iomap_flags_t           iomap_flags;
 } xfs_iomap_t;