netdev - Re: [PATCH net 2/2] selftest: forwarding: router: Add a test case for IPv4 link-local source IP

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Message-ID: <20250814063420.40ea16ab@kernel.org>
Date: Thu, 14 Aug 2025 06:34:20 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Ido Schimmel <idosch@...dia.com>
Cc: Petr Machata <petrm@...dia.com>, "David S. Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Paolo Abeni
 <pabeni@...hat.com>, Andrew Lunn <andrew+netdev@...n.ch>,
 netdev@...r.kernel.org, Simon Horman <horms@...nel.org>, Jiri Pirko
 <jiri@...nulli.us>, mlxsw@...dia.com
Subject: Re: [PATCH net 2/2] selftest: forwarding: router: Add a test case
 for IPv4 link-local source IP

On Thu, 14 Aug 2025 10:35:27 +0300 Ido Schimmel wrote:
> > The new test case doesn't pass for us:
> > 
> > # 22.73 [+2.13] TEST: IPv4 source IP is link-local                                  [FAIL]
> > # 22.74 [+0.01] Packets were dropped
> > not ok 1 selftests: net/forwarding: router.sh # exit=1
> > 
> > https://netdev-3.bots.linux.dev/vmksft-forwarding-dbg/results/251622/97-router-sh/stdout
> > 
> > LMK if this is an infra problem, I'll hide the series for now:
> > pw-bot: cr  
> 
> Seems that we need to disable rp_filter to prevent packets from getting
> dropped on ingress. Can you test the following diff or should we just
> post a v2?

Tested, rp_filter fixes the new case!