netdev - Re: [PATCH bpf] libbpf: support pre-initializing .bss global variables

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] [day] [month] [year] [list]

Date:   Fri, 12 Jun 2020 15:28:57 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     Andrii Nakryiko <andriin@...com>
Cc:     bpf <bpf@...r.kernel.org>,
        Network Development <netdev@...r.kernel.org>,
        Alexei Starovoitov <ast@...com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii.nakryiko@...il.com>,
        Kernel Team <kernel-team@...com>
Subject: Re: [PATCH bpf] libbpf: support pre-initializing .bss global variables

On Fri, Jun 12, 2020 at 12:45 PM Andrii Nakryiko <andriin@...com> wrote:
>
> Remove invalid assumption in libbpf that .bss map doesn't have to be updated
> in kernel. With addition of skeleton and memory-mapped initialization image,
> .bss doesn't have to be all zeroes when BPF map is created, because user-code
> might have initialized those variables from user-space.
>
> Fixes: eba9c5f498a1 ("libbpf: Refactor global data map initialization")
> Signed-off-by: Andrii Nakryiko <andriin@...com>

Applied. Thanks