If "l->stripe_unit" is zero the the mod on the next line will cause a divide by zero bug. This comes from the copy_from_user() in ceph_ioctl_set_layout_policy()
Signed-off-by: Dan Carpenter <[email protected]> diff --git a/fs/ceph/ioctl.c b/fs/ceph/ioctl.c index 8e3fb69..81ec22b 100644 --- a/fs/ceph/ioctl.c +++ b/fs/ceph/ioctl.c @@ -42,6 +42,7 @@ static long __validate_layout(struct ceph_mds_client *mdsc, /* validate striping parameters */ if ((l->object_size & ~PAGE_MASK) || (l->stripe_unit & ~PAGE_MASK) || + (l->stripe_unit == 0) || ((unsigned)l->object_size % (unsigned)l->stripe_unit)) return -EINVAL; -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
