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    SubjectRe: [PATCH] xfrm_policy delete security check misplaced
    From: Eric Paris <>
    Date: Fri, 02 Mar 2007 13:29:50 -0500

    > The security hooks to check permissions to remove an xfrm_policy were
    > actually done after the policy was removed. Since the unlinking and
    > deletion are done in xfrm_policy_by* functions this moves the hooks
    > inside those 2 functions. There we have all the information needed to
    > do the security check and it can be done before the deletion. Since
    > auditing requires the result of that security check err has to be passed
    > back and forth from the xfrm_policy_by* functions.
    > This patch also fixes a bug where a deletion that failed the security
    > check could cause improper accounting on the xfrm_policy
    > (xfrm_get_policy didn't have a put on the exit path for the hold taken
    > by xfrm_policy_by*)
    > It also fixes the return code when no policy is found in
    > xfrm_add_pol_expire. In old code (at least back in the 2.6.18 days) err
    > wasn't used before the return when no policy is found and so the
    > initialization would cause err to be ENOENT. But since err has since
    > been used above when we don't get a policy back from the xfrm_policy_by*
    > function we would always return 0 instead of the intended ENOENT. Also
    > fixed some white space damage in the same area.
    > Signed-off-by: Eric Paris <>

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