Am Freitag, 3. April 2015, 17:58:28 schrieb Herbert Xu: Hi Herbert,
> On Thu, Apr 02, 2015 at 07:05:27PM +0200, Stephan Mueller wrote: > > diff --git a/crypto/algapi.c b/crypto/algapi.c > > index 83b04e0..215c604 100644 > > --- a/crypto/algapi.c > > +++ b/crypto/algapi.c > > > > @@ -545,6 +545,10 @@ unlock: > > goto err; > > > > crypto_wait_for_test(larval); > > > > + > > + /* Remove instance if test failed */ > > + if (!(inst->alg.cra_flags & CRYPTO_ALG_TESTED)) > > + crypto_unregister_instance(inst); > > Unfortunately I don't think this is safe because the moment you > release the mutex the instance can be freed. So you'll need to > hold a reference to it. > > Cheers, Wpuldn't crypto_del_alg suffer from the same issue? I see that the cra_refcnt is checked. But I guess there would be the same kind of race? -- Ciao Stephan -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
