linux-kernel - Re: [PATCH] vdpa/mlx5: Fix erroneous null pointer checks

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Date:   Fri, 7 Aug 2020 11:59:29 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Alex Dewar <alex.dewar90@...il.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Parav Pandit <parav@...lanox.com>,
        Eli Cohen <eli@...lanox.com>,
        virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] vdpa/mlx5: Fix erroneous null pointer checks


On 2020/8/7 上午11:37, Jason Wang wrote:
>
> On 2020/8/7 上午3:18, Alex Dewar wrote:
>> In alloc_inout() in net/mlx5_vnet.c, there are a few places where memory
>> is allocated to *in and *out, but only the values of in and out are
>> null-checked (i.e. there is a missing dereference). Fix this.
>>
>> Addresses-Coverity: ("CID 1496603: (REVERSE_INULL)")
>> Fixes: 1a86b377aa21 ("vdpa/mlx5: Add VDPA driver for supported mlx5 
>> devices")
>> Signed-off-by: Alex Dewar <alex.dewar90@...il.com>
>
>
> Acked-by: Jason Wang <jasowang@...hat.com>


Colin posted something similar: [PATCH][next] vdpa/mlx5: fix memory 
allocation failure checks

And I think his fix is better since it prevent raw pointers to be freed.

Thanks