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Date: Wed, 5 Jul 2017 09:03:06 +0000 From: "Reshetova, Elena" <elena.reshetova@...el.com> To: David Miller <davem@...emloft.net> CC: "netdev@...r.kernel.org" <netdev@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linux-decnet-user@...ts.sourceforge.net" <linux-decnet-user@...ts.sourceforge.net>, "jmorris@...ei.org" <jmorris@...ei.org>, "kaber@...sh.net" <kaber@...sh.net>, "yoshfuji@...ux-ipv6.org" <yoshfuji@...ux-ipv6.org>, "kuznet@....inr.ac.ru" <kuznet@....inr.ac.ru>, "3chas3@...il.com" <3chas3@...il.com>, "ralf@...ux-mips.org" <ralf@...ux-mips.org>, "stephen@...workplumber.org" <stephen@...workplumber.org>, "jchapman@...alix.com" <jchapman@...alix.com>, "jhs@...atatu.com" <jhs@...atatu.com>, "bridge@...ts.linux-foundation.org" <bridge@...ts.linux-foundation.org>, "linux-hams@...r.kernel.org" <linux-hams@...r.kernel.org>, "linux-x25@...r.kernel.org" <linux-x25@...r.kernel.org>, "peterz@...radead.org" <peterz@...radead.org>, "keescook@...omium.org" <keescook@...omium.org>, "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>, "linux-sctp@...r.kernel.org" <linux-sctp@...r.kernel.org>, "vyasevich@...il.com" <vyasevich@...il.com>, "nhorman@...driver.com" <nhorman@...driver.com>, "linux-nfs@...r.kernel.org" <linux-nfs@...r.kernel.org>, "zyan@...hat.com" <zyan@...hat.com>, "sage@...hat.com" <sage@...hat.com>, "bfields@...ldses.org" <bfields@...ldses.org>, "jlayton@...chiereds.net" <jlayton@...chiereds.net>, "steffen.klassert@...unet.com" <steffen.klassert@...unet.com>, "herbert@...dor.apana.org.au" <herbert@...dor.apana.org.au>, "santosh.shilimkar@...cle.com" <santosh.shilimkar@...cle.com>, "jreuter@...na.de" <jreuter@...na.de> Subject: RE: [PATCH 00/36] v2 net subsystem misc refcounter conversions > From: Elena Reshetova <elena.reshetova@...el.com> > 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.
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