From: Michal Hocko <mhocko@kernel.org>
To: Dianzhang Chen <dianzhangchen0@gmail.com>
Cc: cl@linux.com, penberg@kernel.org, rientjes@google.com,
iamjoonsoo.kim@lge.com, akpm@linux-foundation.org,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm/slab_common.c: fix possible spectre-v1 in kmalloc_slab()
Date: Wed, 29 May 2019 18:25:32 +0200 [thread overview]
Message-ID: <20190529162532.GG18589@dhcp22.suse.cz> (raw)
In-Reply-To: <1559133448-31779-1-git-send-email-dianzhangchen0@gmail.com>
On Wed 29-05-19 20:37:28, Dianzhang Chen wrote:
[...]
> @@ -1056,6 +1057,7 @@ struct kmem_cache *kmalloc_slab(size_t size, gfp_t flags)
> if (!size)
> return ZERO_SIZE_PTR;
>
> + size = array_index_nospec(size, 193);
> index = size_index[size_index_elem(size)];
What is this 193 magic number?
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2019-05-29 16:25 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-29 12:37 [PATCH] mm/slab_common.c: fix possible spectre-v1 in kmalloc_slab() Dianzhang Chen
2019-05-29 16:25 ` Michal Hocko [this message]
2019-05-29 16:39 ` Dianzhang Chen
2019-05-29 16:39 ` Dianzhang Chen
2019-05-29 17:49 ` Michal Hocko
2019-05-30 5:20 ` Dianzhang Chen
2019-05-30 5:20 ` Dianzhang Chen
2019-05-30 6:24 ` Michal Hocko
2019-05-30 7:01 ` Dianzhang Chen
2019-05-30 7:01 ` Dianzhang Chen
2019-05-29 19:48 ` Matthew Wilcox
2019-05-30 5:21 ` Dianzhang Chen
2019-05-30 5:21 ` Dianzhang Chen
2019-05-29 20:31 Alexey Dobriyan
2019-05-30 0:04 ` Matthew Wilcox
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