linux-kernel - Re: [PATCH] ibmvnic: fix: NULL pointer dereference.

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Date:   Wed, 30 Dec 2020 16:00:47 -0600
From:   Lijun Pan <lijunp213@...il.com>
To:     YANG LI <abaci-bugfix@...ux.alibaba.com>
Cc:     davem@...emloft.net, Jakub Kicinski <kuba@...nel.org>,
        drt@...ux.ibm.com, Lijun Pan <ljp@...ux.ibm.com>,
        sukadev@...ux.ibm.com, mpe@...erman.id.au,
        benh@...nel.crashing.org, paulus@...ba.org, netdev@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ibmvnic: fix: NULL pointer dereference.

On Wed, Dec 30, 2020 at 1:25 AM YANG LI <abaci-bugfix@...ux.alibaba.com> wrote:
>
> The error is due to dereference a null pointer in function
> reset_one_sub_crq_queue():
>
> if (!scrq) {
>     netdev_dbg(adapter->netdev,
>                "Invalid scrq reset. irq (%d) or msgs(%p).\n",
>                 scrq->irq, scrq->msgs);
>                 return -EINVAL;
> }
>
> If the expression is true, scrq must be a null pointer and cannot
> dereference.
>
> Signed-off-by: YANG LI <abaci-bugfix@...ux.alibaba.com>
> Reported-by: Abaci <abaci@...ux.alibaba.com>
> ---

Acked-by: Lijun Pan <ljp@...ux.ibm.com>