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List:       linux-hardening
Subject:    Re: [PATCH] exit: Use READ_ONCE() for all oops/warn limit reads
From:       Peter Zijlstra <peterz () infradead ! org>
Date:       2022-12-19 11:39:49
Message-ID: Y6BNhQ2C2huPaOqa () hirez ! programming ! kicks-ass ! net
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On Fri, Dec 16, 2022 at 12:30:28PM -0800, Kees Cook wrote:
> Use a temporary variable to take full advantage of READ_ONCE() behavior.
> Without this, the report (and even the test) might be out of sync with
> the initial test.
> 
> Reported-by: Peter Zijlstra <peterz@infradead.org>
> Link: https://lore.kernel.org/lkml/Y5x7GXeluFmZ8E0E@hirez.programming.kicks-ass.net
> Fixes: 9fc9e278a5c0 ("panic: Introduce warn_limit")
> Fixes: d4ccd54d28d3 ("exit: Put an upper limit on how often we can oops")

Thanks!

Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
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