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xfrm: Flushing empty SAD generates false events

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To see the effect make sure you have an empty SAD.
On window1 "ip xfrm mon" and on window2 issue "ip xfrm state flush"
You get prompt back in window2 and you see the flush event on window1.
With this fix, you still get prompt on window1 but no event on window2.

Thanks to Alexey Dobriyan for finding a bug in earlier version
when using pfkey to do the flushing.

Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jamal Hadi Salim
2010-02-19 02:00:41 +00:00
committed by David S. Miller
parent 8be987d734
commit 9e64cc9572
3 changed files with 14 additions and 4 deletions
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5
net/xfrm/xfrm_user.c
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@@ -1524,8 +1524,11 @@ static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
audit_info.sessionid = NETLINK_CB(skb).sessionid;
audit_info.secid = NETLINK_CB(skb).sid;
err = xfrm_state_flush(net, p->proto, &audit_info);
if (err)
if (err) {
if (err == -ESRCH) /* empty table */
return 0;
return err;
}
c.data.proto = p->proto;
c.event = nlh->nlmsg_type;
c.seq = nlh->nlmsg_seq;