rbd: Fix ceph_snap_context size calculation

ceph_snap_context->snaps is an u64 array

Signed-off-by: Zheng Yan <zheng.z.yan@intel.com>
Reviewed-by: Alex Elder <elder@inktank.com>
(cherry picked from commit f9f9a1904467816452fc70740165030e84c2c659)

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 65665c9..8b9c173 100644 (file)
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -499,7 +499,7 @@ static int rbd_header_from_disk(struct rbd_image_header *header,
                         / sizeof (*ondisk))
                return -EINVAL;
        header->snapc = kmalloc(sizeof(struct ceph_snap_context) +
-                               snap_count * sizeof (*ondisk),
+                               snap_count * sizeof(u64),
                                gfp_flags);
        if (!header->snapc)
                return -ENOMEM;