linux-kernel - Re: [PATCH v4] net: wan: Add checks for NULL for utdm in undo_uhdlc_init and unmap_si

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Message-ID: <Y7+yLgGr1GO/rXun@unreal>
Date:   Thu, 12 Jan 2023 09:09:34 +0200
From:   Leon Romanovsky <leon@...nel.org>
To:     Esina Ekaterina <eesina@...ralinux.ru>
Cc:     Zhao Qiang <qiang.zhao@....com>,
        "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        lvc-project@...uxtesting.org
Subject: Re: [PATCH v4] net: wan: Add checks for NULL for utdm in
 undo_uhdlc_init and unmap_si_regs

On Wed, Jan 11, 2023 at 10:55:33PM +0300, Esina Ekaterina wrote:
> If uhdlc_priv_tsa != 1 then utdm is not initialized.
> And if ret != NULL then goto undo_uhdlc_init, where
> utdm is dereferenced. Same if dev == NULL.
> 
> Found by Astra Linux on behalf of Linux Verification Center
> (linuxtesting.org) with SVACE.
> 
> Signed-off-by: Esina Ekaterina <eesina@...ralinux.ru>
>   ---
> v4: Fix style
> v3: Remove braces
> v2: Add check for NULL for unmap_si_regs
> ---
>  drivers/net/wan/fsl_ucc_hdlc.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)

In addition to what Jakub said, please don't send patches as reply-to.
Please sent them as new threads.

Thanks