netdev - Re: [PATCH v2 net-next 2/5] bpf/verifier: when pruning a branch, ignore its write marks

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 07:42:27 -0700
From:   Alexei Starovoitov <ast@...com>
To:     Edward Cree <ecree@...arflare.com>, <davem@...emloft.net>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>,
        Daniel Borkmann <daniel@...earbox.net>
CC:     <netdev@...r.kernel.org>,
        iovisor-dev <iovisor-dev@...ts.iovisor.org>
Subject: Re: [PATCH v2 net-next 2/5] bpf/verifier: when pruning a branch,
 ignore its write marks

On 8/23/17 7:10 AM, Edward Cree wrote:
> The fact that writes occurred in reaching the continuation state does
>  not screen off its reads from us, because we're not really its parent.
> So detect 'not really the parent' in do_propagate_liveness, and ignore
>  write marks in that case.
>
> Fixes: dc503a8ad984 ("bpf/verifier: track liveness for pruning")
> Signed-off-by: Edward Cree <ecree@...arflare.com>

Acked-by: Alexei Starovoitov <ast@...nel.org>