Re: [PATCH] kernel: bpf: remove dead code

From: Daniel Borkmann
Date: Mon May 22 2017 - 13:00:38 EST


On 05/22/2017 06:27 PM, David Miller wrote:
[...]
Ok I understand the issue now. Thanks for explaining.

I guess a hard-coded value of 2 and an adjusted comment above the
assignment of ip_align is the way to go.

I'll push the following, thanks everyone:

====================
net: Make IP alignment calulations clearer.

The assignmnet:

ip_align = strict ? 2 : NET_IP_ALIGN;

in compare_pkt_ptr_alignment() trips up Coverity because we can only
get to this code when strict is true, therefore ip_align will always
be 2 regardless of NET_IP_ALIGN's value.

So just assign directly to '2' and explain the situation in the
comment above.

Reported-by: "Gustavo A. R. Silva" <garsilva@xxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>

Yeah, that's fine, thanks!

Acked-by: Daniel Borkmann <daniel@xxxxxxxxxxxxx>