From: Marek Marczykowski Subject: blkfront: fix data size for xenbus_gather in connect() barrier variable is int, not long. This overflow caused another variable override: "err" (in PV code) and "binfo" (in xenlinux code - drivers/xen/blkfront/blkfront.c). The later caused incorrect device flags (RO/removable etc). Signed-off-by: Marek Marczykowski Acked-by: Ian Campbell Signed-off-by: Jan Beulich --- a/drivers/xen/blkfront/blkfront.c +++ b/drivers/xen/blkfront/blkfront.c @@ -364,7 +364,7 @@ static void connect(struct blkfront_info } err = xenbus_gather(XBT_NIL, info->xbdev->otherend, - "feature-barrier", "%lu", &info->feature_barrier, + "feature-barrier", "%d", &info->feature_barrier, NULL); if (err) info->feature_barrier = 0;