netdev - Re: [PATCH v2 bpf-next 5/7] x86/alternative: introduce text_poke

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Message-ID: <YbmwEZub47vxlFT/@hirez.programming.kicks-ass.net>
Date:   Wed, 15 Dec 2021 10:06:25 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Song Liu <song@...nel.org>
Cc:     bpf@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, ast@...nel.org, daniel@...earbox.net,
        andrii@...nel.org, kernel-team@...com, x86@...nel.org
Subject: Re: [PATCH v2 bpf-next 5/7] x86/alternative: introduce text_poke_jit

On Tue, Dec 14, 2021 at 10:01:00PM -0800, Song Liu wrote:
> This will be used by BPF jit compiler to dump JITed binary to a RWX huge

RWX *must* not happen, ever. If you still rely on that full NAK.