linux-kernel - Re: [PATCH] nitrox: avoid double free on error path in nitrox_sriov

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Message-ID: <Y1KDtUdjmEVRKPt9@gondor.apana.org.au>
Date:   Fri, 21 Oct 2022 19:34:13 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Natalia Petrova <n.petrova@...tech.ru>
Cc:     "David S. Miller" <davem@...emloft.net>,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
        ldv-project@...uxtesting.org,
        Alexey Khoroshilov <khoroshilov@...ras.ru>
Subject: Re: [PATCH] nitrox: avoid double free on error path in
 nitrox_sriov_init()

On Wed, Sep 28, 2022 at 01:25:05PM +0300, Natalia Petrova wrote:
> If alloc_workqueue() fails in nitrox_mbox_init() it deallocates
> ndev->iov.vfdev and returns error code, but then nitrox_sriov_init()
> calls nitrox_sriov_cleanup() where ndev->iov.vfdev is deallocated
> again.
> 
> Fix this by nulling ndev->iov.vfdev after the first deallocation.
> 
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
> 
> Signed-off-by: Natalia Petrova <n.petrova@...tech.ru>
> Signed-off-by: Alexey Khoroshilov <khoroshilov@...ras.ru>
> ---
>  drivers/crypto/cavium/nitrox/nitrox_mbx.c | 1 +
>  1 file changed, 1 insertion(+)

Patch 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