Re: [PATCH for 5.10.y 0/2] backports of ddbd89deb7d3 and aa6f8dcbab47

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On Tue, Mar 22, 2022 at 11:02:16AM +0100, Halil Pasic wrote:
> Dear Stable Team,
> 
> This is a backport of ddbd89deb7d3 ("swiotlb: fix info leak with
> DMA_FROM_DEVICE") and aa6f8dcbab47 ("swiotlb: rework "fix info leak with
> DMA_FROM_DEVICE"") to 5.10.y.  
> 
> I had to handle some merge conflicts, and at this point we have
> swiotlb_tbl_sync_single() as opposed to swiotlb_sync_single_for_device()
> so I had to handle that as well.
> 
> Halil Pasic (2):
>   swiotlb: fix info leak with DMA_FROM_DEVICE
>   swiotlb: rework "fix info leak with DMA_FROM_DEVICE"
> 
>  kernel/dma/swiotlb.c | 24 ++++++++++++++++--------
>  1 file changed, 16 insertions(+), 8 deletions(-)

Thanks for these.

What about for kernels older than 5.10?  Do they matter for this issue?

thanks,

greg k-h



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