Return-Path: Received: from mga01.intel.com ([192.55.52.88]:40998 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751966AbdGEJDO (ORCPT ); Wed, 5 Jul 2017 05:03:14 -0400 From: "Reshetova, Elena" To: David Miller CC: "netdev@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-decnet-user@lists.sourceforge.net" , "jmorris@namei.org" , "kaber@trash.net" , "yoshfuji@linux-ipv6.org" , "kuznet@ms2.inr.ac.ru" , "3chas3@gmail.com" <3chas3@gmail.com>, "ralf@linux-mips.org" , "stephen@networkplumber.org" , "jchapman@katalix.com" , "jhs@mojatatu.com" , "bridge@lists.linux-foundation.org" , "linux-hams@vger.kernel.org" , "linux-x25@vger.kernel.org" , "peterz@infradead.org" , "keescook@chromium.org" , "linux-rdma@vger.kernel.org" , "linux-sctp@vger.kernel.org" , "vyasevich@gmail.com" , "nhorman@tuxdriver.com" , "linux-nfs@vger.kernel.org" , "zyan@redhat.com" , "sage@redhat.com" , "bfields@fieldses.org" , "jlayton@poochiereds.net" , "steffen.klassert@secunet.com" , "herbert@gondor.apana.org.au" , "santosh.shilimkar@oracle.com" , "jreuter@yaina.de" Subject: RE: [PATCH 00/36] v2 net subsystem misc refcounter conversions Date: Wed, 5 Jul 2017 09:03:06 +0000 Message-ID: <2236FBA76BA1254E88B949DDB74E612B6FF20D45@IRSMSX102.ger.corp.intel.com> References: <1499172811-16271-1-git-send-email-elena.reshetova@intel.com> <20170704.230040.195111189904913382.davem@davemloft.net> In-Reply-To: <20170704.230040.195111189904913382.davem@davemloft.net> Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Sender: linux-nfs-owner@vger.kernel.org List-ID: > From: Elena Reshetova > Date: Tue, 4 Jul 2017 15:52:55 +0300 > > > Changes in v2: > > * rebase on top of net-next > > * currently by default refcount_t = atomic_t (*) and uses all > > atomic standard operations unless CONFIG_REFCOUNT_FULL is enabled. > > This is a compromise for the systems that are critical on > > performance (such as net) and cannot accept even slight delay > > on the refcounter operations. > > > > This series, for various misc network components, replaces atomic_t reference > > counters with the new refcount_t type and API (see include/linux/refcount.h). > > By doing this we prevent intentional or accidental > > underflows or overflows that can led to use-after-free vulnerabilities. > > These are the last networking-related conversions with the exception of > > network drivers (to be send separately). > > > > Please excuse the long patch set, but seems like breaking it up > > won't save that much on CC list and most of the changes are > > trivial. > > > > The patches are fully independent and can be cherry-picked separately. > > In order to try with refcount functionality enabled in run-time, > > CONFIG_REFCOUNT_FULL must be enabled. > > > > NOTE: automatic kernel builder for some reason doesn't like all my > > network branches and regularly times out the builds on these branches. > > Suggestion for "waiting a day for a good coverage" doesn't work, as > > we have seen with generic network conversions. So please wait for the > > full report from kernel test rebot before merging further up. > > This has been compile-tested in 116 configs, but 71 timed out (including > > all s390-related configs again). I am trying to see if they can fix > > build coverage for me in meanwhile. > > > > * The respective change is currently merged into -next as > > "locking/refcount: Create unchecked atomic_t implementation". > > Series applied, that's enough for this cycle, please. Thank you very much David! I really appreciate you taking so many of these conversions in one go! I will stop for now :) With regards to net, I only have networking drivers left (16 patches in total), but I can submit them in the next round. Will go bug other subsystem maintainers next :) Best Regards, Elena.