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

[Daniel Borkmann]

On 05/03/2018 06:04 PM, Mark Rutland wrote:
> 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>
> Cc: Alexei Starovoitov <ast@xxxxxxxxxx>
> Cc: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> Cc: Daniel Borkmann <daniel@xxxxxxxxxxxxx>
> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> Cc: netdev@xxxxxxxxxxxxxxx

Applied to bpf tree, thanks Mark! I've also just submitted one for
BPF progs (http://patchwork.ozlabs.org/patch/908385/) which is same
situation.