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Re: [Qemu-devel] [PATCH v3] virtio: add check for descriptor's mapped ad
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From: |
Stefan Hajnoczi |
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Subject: |
Re: [Qemu-devel] [PATCH v3] virtio: add check for descriptor's mapped address |
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Date: |
Tue, 20 Sep 2016 14:57:09 +0100 |
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User-agent: |
Mutt/1.7.0 (2016-08-17) |
On Mon, Sep 19, 2016 at 11:55:45PM +0530, P J P wrote:
> From: Prasad J Pandit <address@hidden>
>
> virtio back end uses set of buffers to facilitate I/O operations.
> If its size is too large, 'cpu_physical_memory_map' could return
> a null address. This would result in a null dereference while
> un-mapping descriptors. Add check to avoid it.
>
> Reported-by: Qinghao Tang <address@hidden>
> Signed-off-by: Prasad J Pandit <address@hidden>
> ---
> hw/virtio/virtio.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> Update per:
> -> https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg04329.html
Reviewed-by: Stefan Hajnoczi <address@hidden>
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