tree 8a23a63e2b4240124c3ee55addf0c1e59fba00eb
parent c386578f1cdb4dac230395a951f88027f64346e3
author Sowmini Varadhan <sowmini.varadhan@oracle.com> 1445442505 -0400
committer Steffen Klassert <steffen.klassert@secunet.com> 1445575769 +0200

xfrm: Fix unaligned access to stats in copy_to_user_state()

On sparc, deleting established SAs (e.g., by restarting ipsec)
results in unaligned access messages via xfrm_del_sa ->
km_state_notify -> xfrm_send_state_notify().

Even though struct xfrm_usersa_info is aligned on 8-byte boundaries,
netlink attributes are fundamentally only 4 byte aligned, and this
cannot be changed for nla_data() that is passed up to userspace.
As a result, the put_unaligned() macro needs to be used to
set up potentially unaligned fields such as the xfrm_stats in
copy_to_user_state()

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>