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xfrm: fix the if_id check in changelink

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commit 6d0d95a1c2 upstream.

if_id will be always 0, because it was not yet initialized.

Fixes: 8dce439195 ("xfrm: interface with if_id 0 should return error")
Reported-by: Pavel Machek <pavel@denx.de>
Signed-off-by: Antony Antony <antony.antony@secunet.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Antony Antony
2022-02-01 07:51:57 +01:00
committed by Greg Kroah-Hartman
parent 24efaae03b
commit 2f0e6d80e8
1 changed files with 1 additions and 1 deletions
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2
net/xfrm/xfrm_interface.c
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@@ -679,12 +679,12 @@ static int xfrmi_changelink(struct net_device *dev, struct nlattr *tb[],
struct net *net = xi->net;
struct xfrm_if_parms p = {};
xfrmi_netlink_parms(data, &p);
if (!p.if_id) {
NL_SET_ERR_MSG(extack, "if_id must be non zero");
return -EINVAL;
}
xfrmi_netlink_parms(data, &p);
xi = xfrmi_locate(net, &p);
if (!xi) {
xi = netdev_priv(dev);