linux-kernel - Re: [PATCH] clk: stm32f4: avoid uninitialized variable access

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Message-ID: <20170112220627.GQ17126@codeaurora.org>
Date:   Thu, 12 Jan 2017 14:06:27 -0800
From:   Stephen Boyd <sboyd@...eaurora.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Michael Turquette <mturquette@...libre.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Gabriel Fernandez <gabriel.fernandez@...com>,
        Rob Herring <robh@...nel.org>,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] clk: stm32f4: avoid uninitialized variable access

On 01/11, Arnd Bergmann wrote:
> The failure path in the newly added function tries to free an
> uninitialized pointer:
> 
> drivers/clk/clk-stm32f4.c: In function 'stm32f4_rcc_init':
> drivers/clk/clk-stm32f4.c:1106:4: error: 'gate' may be used uninitialized in this function [-Werror=maybe-uninitialized]
> 
> I'm adding an initialization to NULL here to make the kfree()
> succeed, and I'm also rearranging the cleanup so that the
> same kfree() is used for any error path, making the function
> slightly more robust against newly introduced bugs in the
> error handling.
> 
> Fixes: daf2d117cbca ("clk: stm32f4: Add lcd-tft clock")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---

Applied to clk-next. Seems I need to update my compiler to find
these warnings.

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