netdev - Re: RTM_DELROUTE not sent anymore when deleting (last) nexthop of routes in 6.1 #forregzbot

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Message-ID: <06fcec0d-c8aa-d181-441b-695afe6a4e18@leemhuis.info>
Date:   Sun, 27 Nov 2022 13:08:21 +0100
From:   Thorsten Leemhuis <regressions@...mhuis.info>
To:     Network Development <netdev@...r.kernel.org>
Cc:     "regressions@...ts.linux.dev" <regressions@...ts.linux.dev>
Subject: Re: RTM_DELROUTE not sent anymore when deleting (last) nexthop of
 routes in 6.1 #forregzbot

On 25.11.22 09:36, Thorsten Leemhuis wrote:
> On 24.11.22 10:20, Jonas Gorski wrote:
>> when an IPv4 route gets removed because its nexthop was deleted, the
>> kernel does not send a RTM_DELROUTE netlink notifications anymore in
>> 6.1. A bisect lead me to 61b91eb33a69 ("ipv4: Handle attempt to delete
>> multipath route when fib_info contains an nh reference"), and
>> reverting it makes it work again.
> 
> Thanks for the report. To be sure below issue doesn't fall through the
> cracks unnoticed, I'm adding it to regzbot, my Linux kernel regression
> tracking bot:
> 
> #regzbot ^introduced 61b91eb33a69
> #regzbot title net: RTM_DELROUTE not sent anymore when deleting (last)
> nexthop of routes
> #regzbot ignore-activity

#regzbot monitor:
https://lore.kernel.org/all/20221124210932.2470010-1-idosch@nvidia.com/