On Mon, Dec 26, 2016 at 05:26:19PM -0500, David Miller wrote:
> From: Anatoly Pugachev <matorola@xxxxxxxxx>
> Date: Sun, 25 Dec 2016 20:56:08 +0300
>
> > Disabling kernel config option
> > CRYPTO_MANAGER_DISABLE_TESTS
> > i.e. enable run-time self tests, makes kernel unbootable:
> >
> > tested with git kernels v4.9-8648-g5cc60aeedf31 and v4.9-12259-g7c0f6ba682b9
>
> I think the testing code for the new synchronous compression module is
> putting kernel image pointers into scatterlists, which in turn we
> attempt to transform to and from page structs.
>
> That doesn't work.
>
> It's coming from the test input buffers:
>
> static int test_acomp(struct crypto_acomp *tfm, struct comp_testvec *ctemplate,
> struct comp_testvec *dtemplate, int ctcount, int dtcount)
> {
> ...
> sg_init_one(&src, ctemplate[i].input, ilen);
>
> These have to be copied into kmalloc() buffers or similar, just like
> the skchiper tests do.
>
> The crash on sparc64 shows that we try to dereference a page struct at
> a bogus vmemmap address for a page that doesn't exist.
>
> I hacked up the following and this makes the crashes go away:
Thanks Dave. I've just applied the patch
https://patchwork.kernel.org/patch/9483763/
which should fix this.
Cheers,
--
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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