linux-kernel - Re: [PATCH 3/9] sched: add sched_numa_find_nth

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Date:   Mon, 20 Feb 2023 11:46:57 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Yury Norov <yury.norov@...il.com>
Cc:     linux-kernel@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Barry Song <baohua@...nel.org>,
        Ben Segall <bsegall@...gle.com>,
        Bruno Goncalves <bgoncalv@...hat.com>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Gal Pressman <gal@...dia.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Haniel Bristot de Oliveira <bristot@...hat.com>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Ingo Molnar <mingo@...hat.com>,
        Jacob Keller <jacob.e.keller@...el.com>,
        Jason Gunthorpe <jgg@...dia.com>,
        Jesse Brandeburg <jesse.brandeburg@...el.com>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Juri Lelli <juri.lelli@...hat.com>,
        Kees Cook <kees@...nel.org>,
        Leon Romanovsky <leonro@...dia.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Mel Gorman <mgorman@...e.de>,
        Peter Lafreniere <peter@...jl.ca>,
        Peter Zijlstra <peterz@...radead.org>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Saeed Mahameed <saeedm@...dia.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Tariq Toukan <tariqt@...dia.com>,
        Tariq Toukan <ttoukan.linux@...il.com>,
        Tony Luck <tony.luck@...el.com>,
        Valentin Schneider <vschneid@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        linux-crypto@...r.kernel.org, netdev@...r.kernel.org,
        linux-rdma@...r.kernel.org
Subject: Re: [PATCH 3/9] sched: add sched_numa_find_nth_cpu()

On Thu, 16 Feb 2023 17:39:08 -0800 Yury Norov wrote:
> Despite that prev_hop is used conditionally on curr_hop is not the
> first hop, it's initialized unconditionally.
> 
> Because initialization implies dereferencing, it might happen that
> the code dereferences uninitialized memory, which has been spotted by
> KASAN. Fix it by reorganizing hop_cmp() logic.
> 
> Reported-by: Bruno Goncalves <bgoncalv@...hat.com>
> Signed-off-by: Yury Norov <yury.norov@...il.com>

Fixed the spelling pointed out by Andy and applied, thanks!