Messages in this thread | | | Subject | Re: [PATCH net-next v2 3/3] netlink: add validation of NLA_F_NESTED flag | From | Johannes Berg <> | Date | Tue, 23 Jul 2019 20:17:47 +0200 |
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On Tue, 2019-07-23 at 11:02 -0700, Stephen Hemminger wrote: > > There are some cases where netlink related to IPv4 does not send nested > flag. You risk breaking older iproute2 and other tools being used on newer > kernel. I.e this patch may break binary compatibility. Have you tried running > with this on a very old distro (like Redhat Linux 9)?
There are *tons* of places where this (and other things) wasn't done right, but the validation is only added for
* all attributes on _new operations_ (that old userspace couldn't have been using since they're introduced after this patch) * _new attributes_ (dito, if the policy 'strict start' is filled)
johannes
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