linux-kernel - Re: [PATCH] bpf: remove misleading spec

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:   Thu, 16 Mar 2023 21:10:18 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Luis Gerhorst <gerhorst@...fau.de>
Cc:     ast@...nel.org, daniel@...earbox.net, john.fastabend@...il.com,
        andrii@...nel.org, martin.lau@...ux.dev, song@...nel.org,
        yhs@...com, kpsingh@...nel.org, sdf@...gle.com, haoluo@...gle.com,
        jolsa@...nel.org, andreimatei1@...il.com, bpf@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] bpf: remove misleading spec_v1 check on var-offset stack read

Hello:

This patch was applied to bpf/bpf-next.git (master)
by Daniel Borkmann <daniel@...earbox.net>:

On Wed, 15 Mar 2023 17:54:00 +0100 you wrote:
> For every BPF_ADD/SUB involving a pointer, adjust_ptr_min_max_vals()
> ensures that the resulting pointer has a constant offset if
> bypass_spec_v1 is false. This is ensured by calling
> sanitize_check_bounds() which in turn calls
> check_stack_access_for_ptr_arithmetic(). There, -EACCESS is returned if
> the register's offset is not constant, thereby rejecting the program.
> 
> [...]

Here is the summary with links:
  - bpf: remove misleading spec_v1 check on var-offset stack read
    https://git.kernel.org/bpf/bpf-next/c/082cdc69a465

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html