On Thu, Aug 17, 2017 at 10:33 PM, Pablo Neira Ayuso <pa...@netfilter.org> wrote: > On Thu, Aug 17, 2017 at 12:02:20PM +0200, Pablo Neira Ayuso wrote: >> On Wed, Aug 16, 2017 at 08:39:44PM +1200, Xin Long wrote: >> > On Wed, Aug 9, 2017 at 7:33 AM, Cong Wang <xiyou.wangc...@gmail.com> wrote: >> > > On Mon, Aug 7, 2017 at 7:33 PM, Xin Long <lucien....@gmail.com> wrote: >> > >> On Tue, Aug 8, 2017 at 9:15 AM, Cong Wang <xiyou.wangc...@gmail.com> >> > >> wrote: >> > >>> This looks like a completely API burden? >> > >> netfilter xt targets are not really compatible with netsched action. >> > >> I've got to say, the patch is just a way to make checkentry return >> > >> false and avoid panic. like [1] said >> > > >> > > I don't doubt you fix a crash, I am thinking if we can >> > > "fix" the API instead of fixing the caller. >> > Hi, Cong, >> > >> > For now, I don't think it's possible to change APIs or some of their >> > targets >> > for the panic caused by action xt calling. >> > >> > The common way should be fixed in net_sched side. >> > >> > Given that the issue is very easy to triggered, >> > let's wait for netfilter's replies for another few days, >> > otherwise I will repost the fix, agree ? >> >> Please, post the workaround so the kernel doesn't crash anymore. >> >> This is going to be very hard to fix, it's broken since the very >> beginning... > > Wait a second, you could rename par->nft_compat to par->no_entry. From > net/sched/ you can set this to 1, so the entry checks are ignored. > > I'm refering to patch 55917a21d0cc0
par->nft_compat wasn't used to ignore the entry checks, if we rename it as no_entry, some other targets still needs to update. like the ones in this patch's changelog: ECN: ecn_tg_check() TPROXY: tproxy_tg4_check() which means these two checks will be ignored for nft as well, that is not what we want. As nft has e4.ip.proto and e4.ip.invflags being set which net/sched gets nothing. they are still different.
