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Revert "xfrm: state and policy should fail if XFRMA_IF_ID 0"

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commit a3d9001b4e287fc043e5539d03d71a32ab114bcb upstream.

This reverts commit 68ac0f3810e76a853b5f7b90601a05c3048b8b54 because ID
0 was meant to be used for configuring the policy/state without
matching for a specific interface (e.g., Cilium is affected, see
https://github.com/cilium/cilium/pull/18789 and
https://github.com/cilium/cilium/pull/19019).

Signed-off-by: Kai Lueke <kailueke@linux.microsoft.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kai Lueke 2022-03-03 15:55:10 +01:00 committed by Greg Kroah-Hartman
parent 327f1e7d81
commit bdf0316982
1 changed files with 3 additions and 18 deletions
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21
net/xfrm/xfrm_user.c
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@ -629,13 +629,8 @@ static struct xfrm_state *xfrm_state_construct(struct net *net,
xfrm_smark_init(attrs, &x->props.smark);
if (attrs[XFRMA_IF_ID]) {
if (attrs[XFRMA_IF_ID])
x->if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
if (!x->if_id) {
err = -EINVAL;
goto error;
}
}
err = __xfrm_init_state(x, false, attrs[XFRMA_OFFLOAD_DEV]);
if (err)
@ -1371,13 +1366,8 @@ static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
mark = xfrm_mark_get(attrs, &m);
if (attrs[XFRMA_IF_ID]) {
if (attrs[XFRMA_IF_ID])
if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
if (!if_id) {
err = -EINVAL;
goto out_noput;
}
}
if (p->info.seq) {
x = xfrm_find_acq_byseq(net, mark, p->info.seq);
@ -1690,13 +1680,8 @@ static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_us
xfrm_mark_get(attrs, &xp->mark);
if (attrs[XFRMA_IF_ID]) {
if (attrs[XFRMA_IF_ID])
xp->if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
if (!xp->if_id) {
err = -EINVAL;
goto error;
}
}
return xp;
error: