xfrm: Fix unaligned access to stats in copy_to_user_state()

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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>

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Sowmini Varadhan 2015-10-21 11:48:25 -04:00 • committed by Steffen Klassert

parent c386578f1c

commit e33d4f13d2

1 changed files with 4 additions and 1 deletions

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net/xfrm/xfrm_user.c

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