linux-kernel - Re: [PATCH v2] mm/slub: fix panic in slab_alloc

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Message-ID: <alpine.DEB.2.22.394.2010281109580.1521@www.lameter.com>
Date:   Wed, 28 Oct 2020 11:11:20 +0000 (UTC)
From:   Christopher Lameter <cl@...ux.com>
To:     Laurent Dufour <ldufour@...ux.ibm.com>
cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        nathanl@...ux.ibm.com, cheloha@...ux.ibm.com, mhocko@...e.com,
        Vlastimil Babka <vbabka@...e.cz>,
        Pekka Enberg <penberg@...nel.org>,
        David Rientjes <rientjes@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        stable@...r.kernel.org
Subject: Re: [PATCH v2] mm/slub: fix panic in slab_alloc_node()

On Tue, 27 Oct 2020, Laurent Dufour wrote:

> The issue is that object is not NULL while page is NULL which is odd but
> may happen if the cache flush happened after loading object but before
> loading page. Thus checking for the page pointer is required too.


Ok then lets revert commit  6159d0f5c03e? The situation may occur
elsewhere too.