[PATCH 2/2] nvme: prevent potential spectre v1 gadget

[Nitesh Shetty]

On 29/11/23 12:27PM, Dan Carpenter wrote:
>On Tue, Nov 28, 2023 at 05:59:57PM +0530, Nitesh Shetty wrote:
>> This patch fixes the smatch warning, "nvmet_ns_ana_grpid_store() warn:
>> potential spectre issue 'nvmet_ana_group_enabled' [w] (local cap)"
>> Prevent the contents of kernel memory from being leaked to  user space
>> via speculative execution by using array_index_nospec.
>>
>> Signed-off-by: Nitesh Shetty <nj.shetty at samsung.com>
>> ---
>
>When it comes to adding array_index_nospec(), then I don't know enough
>about it to comment.
>
Upon smatch's warning, I referred to kernel documentation[1].
Using array_index_nospec should avoid memory leak.

Thank you,
Nitesh Shetty

[1] https://www.kernel.org/doc/Documentation/speculation.txt