Re: [lvc-project] [PATCH] netfilter: xt_recent: Fix attempt to update removed entry

[Jan Engelhardt]

On Thursday 2023-02-09 16:07, Florian Westphal wrote:

>Igor Artemiev <Igor.A.Artemiev@xxxxxxx> wrote:
>> When both --remove and --update flag are specified, there's a code
>> path at which the entry to be updated is removed beforehand,
>> that leads to kernel crash. Update entry, if --remove flag
>> don't specified.
>> 
>> Found by Linux Verification Center (linuxtesting.org) with SVACE.
>
>How did you manage to do this?  --update and --remove are supposed
>to be mutually exclusive.

I suppose the exclusivity is only checked at the iptables command-line
and neverwhere else.