From: Boris Brezillon <boris.brezillon@free-electrons.com>
To: Han Xu <han.xu@nxp.com>
Cc: <richard@nod.at>, <dwmw2@infradead.org>,
<computersforpeace@gmail.com>, <linux-mtd@lists.infradead.org>,
<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] mtd: gpmi: fix raw_buffer pointer double free issue
Date: Tue, 5 Apr 2016 17:43:41 +0200 [thread overview]
Message-ID: <20160405174341.673e1141@bbrezillon> (raw)
In-Reply-To: <1459802489-30382-1-git-send-email-han.xu@nxp.com>
On Mon, 4 Apr 2016 15:41:29 -0500
Han Xu <han.xu@nxp.com> wrote:
> fix the raw_buffer pointer double free issue found by coverify.
>
> CID 18344 (#2 of 2): Double free (USE_AFTER_FREE)
> 3. double_free: Calling gpmi_alloc_dma_buffer frees pointer
> this->raw_buffer which has already been freed
>
> Signed-off-by: Han Xu <han.xu@nxp.com>
Applied.
Thanks,
Boris
> ---
>
> changes in v2:
> - add coverity check log
> ---
> drivers/mtd/nand/gpmi-nand/gpmi-nand.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
> index 8122c69..dcb60b0 100644
> --- a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
> +++ b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
> @@ -797,6 +797,7 @@ static void gpmi_free_dma_buffer(struct gpmi_nand_data *this)
>
> this->cmd_buffer = NULL;
> this->data_buffer_dma = NULL;
> + this->raw_buffer = NULL;
> this->page_buffer_virt = NULL;
> this->page_buffer_size = 0;
> }
--
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
next prev parent reply other threads:[~2016-04-05 15:43 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-04 20:41 [PATCH] mtd: gpmi: fix raw_buffer pointer double free issue Han Xu
2016-04-04 21:31 ` Richard Weinberger
2016-04-05 15:43 ` Boris Brezillon [this message]
-- strict thread matches above, loose matches on Subject: below --
2016-04-04 17:25 Han Xu
2016-04-04 18:18 ` Richard Weinberger
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