linux-kernel - Re: Contextual conflict between kspp and rcu trees

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Message-ID: <202206151326.E34CDE453@keescook>
Date:   Wed, 15 Jun 2022 13:28:00 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Nathan Chancellor <nathan@...nel.org>
Cc:     Stephen Rothwell <sfr@...b.auug.org.au>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Frederic Weisbecker <frederic@...nel.org>,
        Sami Tolvanen <samitolvanen@...gle.com>, llvm@...ts.linux.dev,
        linux-kernel@...r.kernel.org, linux-next@...r.kernel.org
Subject: Re: Contextual conflict between kspp and rcu trees

On Wed, Jun 15, 2022 at 12:55:53PM -0700, Nathan Chancellor wrote:
> Per the above RCU commit and commit 6c5218715286 ("context_tracking:
> Take IRQ eqs entrypoints over RCU"), it appears that the following diff
> is the proper fix up. Would you mind applying it to the merge of
> whichever tree comes second if possible? I did build and boot test it
> but it would not be a bad idea for Sami and Frederic to verify that it
> is correct so that Kees/Paul can mention it to Linus :)

Actually, the CFI fix (and a few others) are meant to be sent for
-rc3, so if the ct_irq_enter() change is in -next, this can maybe get
sorted out?

-- 
Kees Cook