Re: [v2 PATCH] crypto: caam - fix DKP detection logic

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Thu, May 30, 2019 at 11:36:25AM +0000, Horia Geanta wrote:
> On 5/6/2019 11:06 AM, Horia Geanta wrote:
> > On 5/6/2019 9:40 AM, Herbert Xu wrote:
> >> On Fri, May 03, 2019 at 03:05:48PM +0300, Horia Geantă wrote:
> >>> The detection whether DKP (Derived Key Protocol) is used relies on
> >>> the setkey callback.
> >>> Since "aead_setkey" was replaced in some cases with "des3_aead_setkey"
> >>> (for 3DES weak key checking), the logic has to be updated - otherwise
> >>> the DMA mapping direction is incorrect (leading to faults in case caam
> >>> is behind an IOMMU).
> >>>
> >>> Fixes: 1b52c40919e6 ("crypto: caam - Forbid 2-key 3DES in FIPS mode")
> >>> Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
> >>> ---
> >>>
> >>> This issue was noticed when testing with previously submitted IOMMU support:
> >>> https://patchwork.kernel.org/project/linux-crypto/list/?series=110277&state=*
> >>
> >> Thanks for catching this Horia!
> >>
> >> My preference would be to encode this logic separately rather than
> >> relying on the setkey test.  How about this patch?
> >>
> > This is probably more reliable.
> > 
> >> ---8<---
> >> The detection for DKP (Derived Key Protocol) relied on the value
> >> of the setkey function.  This was broken by the recent change which
> >> added des3_aead_setkey.
> >>
> >> This patch fixes this by introducing a new flag for DKP and setting
> >> that where needed.
> >>
> >> Reported-by: Horia Geantă <horia.geanta@nxp.com>
> >> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
> > Tested-by: Horia Geantă <horia.geanta@nxp.com>
> > 
> Unfortunately the commit message dropped the tag provided in v1:
> Fixes: 1b52c40919e6 ("crypto: caam - Forbid 2-key 3DES in FIPS mode")
> 
> This fix was merged in v5.2-rc1 (commit 24586b5feaf17ecf85ae6259fe3ea7815dee432d
> upstream) but should also be queued up for 5.1.y.

I do not understand, sorry.  What exact patches need to be applied to
5.1.y?

thanks,

greg k-h