linux-kernel - Re: [PATCH] bug: avoid Kconfig warning for BUG_ON_DATA

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Message-ID: <1472226423.2751.57.camel@redhat.com>
Date:   Fri, 26 Aug 2016 11:47:03 -0400
From:   Rik van Riel <riel@...hat.com>
To:     Arnd Bergmann <arnd@...db.de>,
        "Paul E . McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:     Kees Cook <keescook@...omium.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] bug: avoid Kconfig warning for BUG_ON_DATA_CORRUPTION

On Fri, 2016-08-26 at 17:42 +0200, Arnd Bergmann wrote:
> The CONFIG_DEBUG_LIST option is normally meant for kernel developers
> rather than production machines and is guarded by
> CONFIG_DEBUG_KERNEL.
> 
> In contrast, the newly added CONFIG_BUG_ON_DATA_CORRUPTION is meant
> for security hardening and may be used on systems that intentionally
> do not enable CONFIG_DEBUG_KERNEL. In this configuration, we get
> a warning from Kconfig about the mismatched dependencies:
> 
> warning: (BUG_ON_DATA_CORRUPTION) selects DEBUG_LIST which has unmet
> direct dependencies (DEBUG_KERNEL)
> 
> This annotates the DEBUG_LIST option to be selectable by
> BUG_ON_DATA_CORRUPTION when DEBUG_KERNEL is disabled.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Fixes: 40cd725cfc7f ("bug: Provide toggle for BUG on data
> corruption")
> 
Acked-by: Rik van Riel <riel@...hat.com>