netdev - Re: [PATCH net-next] bpf: netdev is never null in __dev_map

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 23 Aug 2017 18:25:38 -0700
From:   Alexei Starovoitov <ast@...com>
To:     Daniel Borkmann <daniel@...earbox.net>, <davem@...emloft.net>
CC:     <john.fastabend@...il.com>, <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next] bpf: netdev is never null in __dev_map_flush

On 8/23/17 6:20 PM, Daniel Borkmann wrote:
> No need to test for it in fast-path, every dev in bpf_dtab_netdev
> is guaranteed to be non-NULL, otherwise dev_map_update_elem() will
> fail in the first place.
>
> Signed-off-by: Daniel Borkmann <daniel@...earbox.net>

wow. interesting. I'm surprised you see a difference from
such micro-optimization.
Acked-by: Alexei Starovoitov <ast@...nel.org>