Re: [PATCH] bpf: fix possible spectre-v1 in find_and_alloc_map()

[David Miller]

From: Mark Rutland <mark.rutland@xxxxxxx>
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@xxxxxxx>

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