linux-hardening - Re: [PATCH] bpf: Always use maximal size for copy

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Date:   Wed, 28 Dec 2022 23:20:14 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Kees Cook <keescook@...omium.org>
Cc:     ast@...nel.org, v4bel@...ori.io, 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, bpf@...r.kernel.org,
        syzbot+b1e1f7feb407b56d0355@...kaller.appspotmail.com,
        linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH] bpf: Always use maximal size for copy_array()

Hello:

This patch was applied to bpf/bpf.git (master)
by Alexei Starovoitov <ast@...nel.org>:

On Fri, 23 Dec 2022 10:28:44 -0800 you wrote:
> Instead of counting on prior allocations to have sized allocations to
> the next kmalloc bucket size, always perform a krealloc that is at least
> ksize(dst) in size (which is a no-op), so the size can be correctly
> tracked by all the various allocation size trackers (KASAN,
> __alloc_size, etc).
> 
> Reported-by: Hyunwoo Kim <v4bel@...ori.io>
> Link: https://lore.kernel.org/bpf/20221223094551.GA1439509@ubuntu
> Fixes: ceb35b666d42 ("bpf/verifier: Use kmalloc_size_roundup() to match ksize() usage")
> Cc: Alexei Starovoitov <ast@...nel.org>
> Cc: Daniel Borkmann <daniel@...earbox.net>
> Cc: John Fastabend <john.fastabend@...il.com>
> Cc: Andrii Nakryiko <andrii@...nel.org>
> Cc: Martin KaFai Lau <martin.lau@...ux.dev>
> Cc: Song Liu <song@...nel.org>
> Cc: Yonghong Song <yhs@...com>
> Cc: KP Singh <kpsingh@...nel.org>
> Cc: Stanislav Fomichev <sdf@...gle.com>
> Cc: Hao Luo <haoluo@...gle.com>
> Cc: Jiri Olsa <jolsa@...nel.org>
> Cc: bpf@...r.kernel.org
> Signed-off-by: Kees Cook <keescook@...omium.org>
> 
> [...]

Here is the summary with links:
  - bpf: Always use maximal size for copy_array()
    https://git.kernel.org/bpf/bpf/c/45435d8da71f

You are awesome, thank you!
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