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Date: Thu, 03 May 2018 12:48:47 -0400 (EDT)
Message-Id: <20180503.124847.1815876480542537219.davem@davemloft.net>
To: mark.rutland@arm.com
Cc: linux-kernel@vger.kernel.org, ast@kernel.org, dan.carpenter@oracle.com,
        daniel@iogearbox.net, peterz@infradead.org, netdev@vger.kernel.org
Subject: Re: [PATCH] bpf: fix possible spectre-v1 in find_and_alloc_map()
From: David Miller <davem@davemloft.net>
In-Reply-To: <20180503160459.4111-1-mark.rutland@arm.com>
References: <20180503160459.4111-1-mark.rutland@arm.com>
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From: Mark Rutland <mark.rutland@arm.com>
Date: Thu,  3 May 2018 17:04:59 +0100

> It's possible for userspace to control attr->map_type. Sanitize it when
> using it as an array index to prevent an out-of-bounds value being used
> under speculation.
> 
> Found by smatch.
> 
> Signed-off-by: Mark Rutland <mark.rutland@arm.com>

Acked-by: David S. Miller <davem@davemloft.net>