netdev - Re: [PATCH net 1/4] netfilter: xt_recent: Fix attempt to update deleted entry

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Message-ID: <3018f068-62b1-6dae-2dde-39d1a62fbcb2@thelounge.net>
Date:   Sun, 7 Feb 2021 17:34:51 +0100
From:   Reindl Harald <h.reindl@...lounge.net>
To:     Jozsef Kadlecsik <kadlec@...filter.org>
Cc:     Pablo Neira Ayuso <pablo@...filter.org>,
        netfilter-devel@...r.kernel.org, davem@...emloft.net,
        netdev@...r.kernel.org, kuba@...nel.org
Subject: Re: [PATCH net 1/4] netfilter: xt_recent: Fix attempt to update
 deleted entry



Am 05.02.21 um 15:42 schrieb Reindl Harald:
> 
> 
> Am 05.02.21 um 14:54 schrieb Jozsef Kadlecsik:
>> Hi Harald,
>>
>> On Fri, 5 Feb 2021, Reindl Harald wrote:
>>
>>> "Reap only entries which won't be updated" sounds for me like the could
>>> be some optimization: i mean when you first update and then check what
>>> can be reaped the recently updated entry would not match to begin with
>>
>> When the entry is new and the given recent table is full we cannot update
>> (add) it, unless old entries are deleted (reaped) first. So it'd require
>> more additional checkings to be introduced to reverse the order of the 
>> two
>> operations.
> well, the most important thing is that the firewall-vm stops to 
> kernel-panic

why is that still not part of 5.10.14 given how old that issue is :-(

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.14