Re: [PATCH] IB/hfi1: Fix Spectre v1 vulnerability

[Doug Ledford]

On Wed, 2019-07-31 at 12:54 -0500, Gustavo A. R. Silva wrote:
> sl is controlled by user-space, hence leading to a potential
> exploitation of the Spectre variant 1 vulnerability.
> 
> Fix this by sanitizing sl before using it to index ibp->sl_to_sc.
> 
> Notice that given that speculation windows are large, the policy is
> to kill the speculation on the first load and not worry if it can be
> completed with a dependent load/store [1].
> 
> [1] 
> https://lore.kernel.org/lkml/20180423164740.GY17484@xxxxxxxxxxxxxx/
> 
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx>
> ---

Thanks, applied to for-rc.

-- 
Doug Ledford <dledford@xxxxxxxxxx>
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