Jan Engelhardt <jengelh@xxxxxxx> wrote: > 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. Removing the userspace check gives me an -EINVAL from checkentry.
