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    SubjectRe: [PATCH 5.19 0537/1157] bpf: Set flow flag to allow any source IP in bpf_tunnel_key
    On Tue, Aug 16, 2022 at 05:07:27PM +0200, Paul Chaignon wrote:
    > On Tue, Aug 16, 2022 at 04:47:30PM +0200, Greg Kroah-Hartman wrote:
    > > On Tue, Aug 16, 2022 at 04:35:54PM +0200, Paul Chaignon wrote:
    > > > On Mon, Aug 15, 2022 at 07:58:13PM +0200, Greg Kroah-Hartman wrote:
    > > > > From: Paul Chaignon <paul@isovalent.com>
    > > > >
    > > > > [ Upstream commit b8fff748521c7178b9a7d32b5a34a81cec8396f3 ]
    > > > >
    > > > > Commit 26101f5ab6bd ("bpf: Add source ip in "struct bpf_tunnel_key"")
    > > > > added support for getting and setting the outer source IP of encapsulated
    > > > > packets via the bpf_skb_{get,set}_tunnel_key BPF helper. This change
    > > > > allows BPF programs to set any IP address as the source, including for
    > > > > example the IP address of a container running on the same host.
    > > > >
    > > > > In that last case, however, the encapsulated packets are dropped when
    > > > > looking up the route because the source IP address isn't assigned to any
    > > > > interface on the host. To avoid this, we need to set the
    > > > > FLOWI_FLAG_ANYSRC flag.
    > > >
    > > > This fix will also require upstream commits 861396ac0b47 ("geneve: Use
    > > > ip_tunnel_key flow flags in route lookups") and 7e2fb8bc7ef6 ("vxlan:
    > > > Use ip_tunnel_key flow flags in route lookups") to have the intended
    > > > effect. In short, these two commits "consume" the new field introduced
    > > > in 451ef36bd229 ("ip_tunnels: Add new flow flags field to
    > > > ip_tunnel_key") and populated in the present commit.
    > >
    > > Ick. Is it better to just drop this commit instead? Or is it ok to
    > > also backport those 2 patches to 5.19.y?
    >
    > It should be okay to backport those additional 2 patches to 5.19.y.

    Thanks, both queued up now.

    greg k-h

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