APPLIED: [SRU][G][PATCH 0/1] Fix broken IPv4 over geneve6 PMTU

[Kleber Souza]

On 15.06.21 16:17, Kleber Sacilotto de Souza wrote:
> BugLink: https://bugs.launchpad.net/bugs/1931731
> 
> [Impact]
> Upstream commit 6628ddfec7580882f11fdc5c194a8ea781fdadfa ("net: geneve: check
> skb is large enough for IPv4/IPv6 header"), applied to groovy/linux 5.8.0-56.63
> via upstream stable update (bug 1929132) introduced a regression caught by
> kernel selftests, pmtu.sh from net testcase:
> 
> 02:56:48 DEBUG| [stdout] # TEST: IPv4 over geneve6: PMTU exceptions [FAIL]
> 02:56:48 DEBUG| [stdout] # PMTU exception wasn't created after exceeding link
> layer MTU on geneve interface
> 02:56:49 DEBUG| [stdout] # TEST: IPv4 over geneve6: PMTU exceptions - nexthop
> objects [FAIL]
> 02:56:49 DEBUG| [stdout] # PMTU exception wasn't created after exceeding link
> layer MTU on geneve interface
> 
> [Fix]
> The issue is fixed by d13f048dd40e8577260cd43faea8ec9b77520197 ("net: geneve:
> modify IP header check in geneve6_xmit_skb and geneve_xmit_skb"), which is
> already applied for the next SRU cycle as part of upstream stable update (bug
> 1930766).
> 
> [Tests]
> I have applied the fix on top of 5.8.0-56.63 and ran pmtu.sh and the whole
> selftests.net suite. The testcase is now completed successfully and no other
> regression was found.
> 
> [Where problems could occur]
> The fix could be a partial fix not covering all corner cases, this could lead to
> other failures with geneve tunnels.
> 
> Phillip Potter (1):
>    net: geneve: modify IP header check in geneve6_xmit_skb and
>      geneve_xmit_skb
> 
>   drivers/net/geneve.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 

Applied to groovy:linux.

Thanks,
Kleber