Re: [PATCH] mm/folio-compact: fix potential NULL pointer in pagecache_get_page

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To: Yongqiang Liu <liuyongqiang13@xxxxxxxxxx>
Subject: Re: [PATCH] mm/folio-compact: fix potential NULL pointer in pagecache_get_page
From: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Date: Wed, 27 Jul 2022 14:29:13 +0100
Cc: dhowells@xxxxxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, zhangxiaoxu5@xxxxxxxxxx, yanaijie@xxxxxxxxxx, vbabka@xxxxxxx, wangkefeng.wang@xxxxxxxxxx
In-reply-to: <20220727064621.534528-1-liuyongqiang13@huawei.com>
References: <20220727064621.534528-1-liuyongqiang13@huawei.com>

On Wed, Jul 27, 2022 at 06:46:21AM +0000, Yongqiang Liu wrote:
> When __filemap_get_folio() failed and returned NULL, we would
> get a NULL pointer dereference in pagecache_get_page.

No we wouldn't.

References:
- [PATCH] mm/folio-compact: fix potential NULL pointer in pagecache_get_page
  - From: Yongqiang Liu

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