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.