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Date:   Fri, 1 Oct 2021 15:49:49 -0700
From:   Andrew Morton <akpm@linux-foundation.org>
To:     Eric Dumazet <eric.dumazet@gmail.com>
Cc:     linux-kernel <linux-kernel@vger.kernel.org>,
        linux-mm <linux-mm@kvack.org>,
        Eric Dumazet <edumazet@google.com>,
        syzbot <syzkaller@googlegroups.com>,
        "Huang, Ying" <ying.huang@intel.com>, Mel Gorman <mgorman@suse.de>
Subject: Re: [PATCH v2] mm/mempolicy: do not allow illegal
 MPOL_F_NUMA_BALANCING | MPOL_LOCAL in mbind()
Message-Id: <20211001154949.98956c092734590e781ce672@linux-foundation.org>
In-Reply-To: <20211001215630.810592-1-eric.dumazet@gmail.com>
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On Fri,  1 Oct 2021 14:56:30 -0700 Eric Dumazet <eric.dumazet@gmail.com> wrote:

> From: Eric Dumazet <edumazet@google.com>
> 
> syzbot reported access to unitialized memory in mbind() [1]

I'm lazy.  What memory is being accessed-unintialized?

> Issue came with commit bda420b98505 ("numa balancing: migrate on
> fault among multiple bound nodes")

No cc:stable?  What's the worst-case user-visible impact here?