From: Jakub Kicinski <kuba@kernel.org>
To: Julia Lawall <julia.lawall@inria.fr>
Cc: Jesse Brandeburg <jesse.brandeburg@intel.com>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Dan Carpenter <dan.carpenter@linaro.org>,
kernel-janitors@vger.kernel.org, netdev@vger.kernel.org,
intel-wired-lan@lists.osuosl.org,
Maciej Fijalkowski <maciej.fijalkowski@intel.com>,
Przemek Kitszel <przemyslaw.kitszel@intel.com>,
Tony Nguyen <anthony.l.nguyen@intel.com>,
LKML <linux-kernel@vger.kernel.org>,
Alexander Lobakin <aleksander.lobakin@intel.com>,
David Laight <David.Laight@aculab.com>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>, Jiri Pirko <jiri@resnulli.us>,
Jonathan Cameron <jic23@kernel.org>,
Kees Cook <keescook@chromium.org>,
Lukasz Czapnik <lukasz.czapnik@intel.com>,
Paolo Abeni <pabeni@redhat.com>,
Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com>,
Dan Williams <dan.j.williams@intel.com>
Subject: Re: [PATCH net] ice: Fix freeing uninitialized pointers
Date: Fri, 22 Mar 2024 08:03:37 -0700 [thread overview]
Message-ID: <20240322080337.77a10cfd@kernel.org> (raw)
In-Reply-To: <82b49991-eb5a-7e8c-67e0-b0fd932f40b4@inria.fr>
On Fri, 22 Mar 2024 03:24:56 -0400 (EDT) Julia Lawall wrote:
> > At present I find this construct unreadable.
> > I may get used to it, hard to say.
> >
> > Also I don't see the benefit of the auto-freeing construct,
> > I'd venture a guess that all the bugs it may prevent would
> > have been caught by smatch. But I'm an old curmudgeon stuck
> > in my ways. Feel free to experiment in Intel drivers, and we'll
> > see how it works out 🤷️
>
> In my experiments with of_node_put, there seem to be many functions where
> removing the frees makes the function much more readable. But
> kmalloc/kfree may be used in different contexts, where the management of
> the memory is a smaller percentage of the overall code. So the tradeoffs
> may be different.
Good point! References are likely a very good use case for this sort
of thing. The act of bumping a counter lacks the feeling of lifetime
we get with an object :(
next prev parent reply other threads:[~2024-03-22 15:03 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-16 9:44 [PATCH net] ice: Fix freeing uninitialized pointers Dan Carpenter
2024-03-18 7:58 ` Jiri Pirko
2024-03-18 8:10 ` Dan Carpenter
2024-03-19 19:43 ` Jakub Kicinski
2024-03-20 5:01 ` Dan Carpenter
2024-03-20 7:32 ` Julia Lawall
2024-03-20 16:33 ` Jonathan Cameron
2024-03-21 3:29 ` Jakub Kicinski
2024-03-21 9:59 ` Przemek Kitszel
2024-03-21 10:34 ` Dan Carpenter
2024-03-20 12:18 ` Markus Elfring
2024-03-21 17:59 ` Markus Elfring
2024-03-21 18:03 ` Andy Shevchenko
2024-03-21 18:14 ` Markus Elfring
2024-03-21 20:20 ` Julia Lawall
2024-03-21 22:27 ` Jesse Brandeburg
2024-03-22 1:48 ` Jakub Kicinski
2024-03-22 1:56 ` Jakub Kicinski
2024-03-22 7:24 ` Julia Lawall
2024-03-22 15:03 ` Jakub Kicinski [this message]
2024-03-22 5:30 ` Dan Carpenter
2024-03-22 8:48 ` Markus Elfring
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