[dm-devel] [PATCH 01/15] virtio_blk: avoid DMA to stack for the sense buffer

[Johannes Thumshirn]

On Tue, Jan 10, 2017 at 04:06:06PM +0100, Christoph Hellwig wrote:
> Most users of BLOCK_PC requests allocate the sense buffer on the stack,
> so to avoid DMA to the stack copy them to a field in the heap allocated
> virtblk_req structure.  Without that any attempt at SCSI passthrough I/O,
> including the SG_IO ioctl from userspace will crash the kernel.  Note that
> this includes running tools like hdparm even when the host does not have
> SCSI passthrough enabled.
> 
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> ---

Isn't that one already queued in Jens' tree?

Byte,
	Johannes

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Johannes Thumshirn                                          Storage
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