Public bug reported:
[SRU Justification]
[Impact]
Packets sent to a vti[6]/xfrm interface via bpf_redirect() or via an
AF_PACKET socket are dropped (no carrier).
This has been fixed in v5.5 by the following upstream commits
- 95224166a903 ("vti[6]: fix packet tx through bpf_redirect()")
- f042365dbffe ("xfrm interface: fix packet tx through bpf_redirect()")
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=95224166a903
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f042365dbffe
The bug exists since the beginning of each driver.
== Fix ==
Backport the requested patches to Focal (5.4), Disco (5.0), Bionic (4.15) and
Xenial (4.4).
== Risk of Regression ==
This patch affects only the cases described above (when no dst is
attached to the skb), thus the risk should be low.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1860969
Title:
ipsec interfaces: fix sending with bpf_redirect() / AF_PACKET sockets
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