Public bug reported:
[Impact]
The tc ebpf bpf_redirect() function cannot be used with ipv6 gre
interface.
This is fixed upstream with commit a3fa449ffcf5 ("net: handle
ARPHRD_IP6GRE in dev_is_mac_header_xmit()"), included in linux v5.14.
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a3fa449ffcf5
It would probably be good to also backport this one: 3b707c3008ca ("net:
dev_is_mac_header_xmit() true for ARPHRD_RAWIP").
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3b707c3008ca
[Test Case]
Create an ebpf program that redirect packets to an ipv6 gre interface
and load it with tc.
[Regression Potential]
The patches are trivial, the potential regressions are low.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1947164
Title:
ebpf: bpf_redirect fails with ip6 gre interfaces
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