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

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Message-ID: <2ccf11e9-6cd9-a5d7-7c97-eab6fee9e1ef@leemhuis.info>
Date:   Tue, 29 Nov 2022 09:50:48 +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 27.11.22 13:08, Thorsten Leemhuis wrote:
> 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/

#regzbot fixed-by: d5082d386eee