Re: [PATCH 1/2] scsi-mq: Only show the CDB if available

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On Mon, Dec 04, 2017 at 10:42:28PM -0500, Martin K. Petersen wrote:
> 
> Hi Ming,
> 
> > Please cook a patch for fixing the crash issue only, since we need
> > to backport the fix to stable kernel.
> 
> I thought you were going to submit a V5 that addressed James' concerns?
> 
> -- 
> Martin K. Petersen	Oracle Linux Engineering

Hi Martin,

I replied in the following link for James's concerns:

	https://marc.info/?l=linux-block&m=151074751321108&w=2

The fact is that use-after-free can't avoided at all, no matter if
we set the cmnd to NULL before calling free, that means we have to
handle use-after-free well in scsi_show_rq(), so we don't need to
touch the free code.

So V4 is well enough for merge, IMO.


Thanks,
Ming



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