linux-kernel - Re: [PATCH 1/2] crypto: hisilicon - Fix double free in sec_free_hw

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Date:   Fri, 20 Sep 2019 23:00:12 +1000
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Yunfeng Ye <yeyunfeng@...wei.com>
Cc:     davem@...emloft.net, john.garry@...wei.com,
        Jonathan.Cameron@...wei.com, mcgrof@...nel.org,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] crypto: hisilicon - Fix double free in
 sec_free_hw_sgl()

On Sun, Sep 15, 2019 at 05:26:56PM +0800, Yunfeng Ye wrote:
> There are two problems in sec_free_hw_sgl():
> 
> First, when sgl_current->next is valid, @hw_sgl will be freed in the
> first loop, but it free again after the loop.
> 
> Second, sgl_current and sgl_current->next_sgl is not match when
> dma_pool_free() is invoked, the third parameter should be the dma
> address of sgl_current, but sgl_current->next_sgl is the dma address
> of next chain, so use sgl_current->next_sgl is wrong.
> 
> Fix this by deleting the last dma_pool_free() in sec_free_hw_sgl(),
> modifying the condition for while loop, and matching the address for
> dma_pool_free().
> 
> Fixes: 915e4e8413da ("crypto: hisilicon - SEC security accelerator driver")
> Signed-off-by: Yunfeng Ye <yeyunfeng@...wei.com>
> ---
>  drivers/crypto/hisilicon/sec/sec_algs.c | 13 +++++++------
>  1 file changed, 7 insertions(+), 6 deletions(-)

All applied.  Thanks.
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt