On Mon, Apr 15, 2019 at 8:37 AM Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> wrote:
>
> When we perform a walk in the completion function, we need to ensure
> that it is atomic.
>
> Fixes: ac3c8f36c31d ("crypto: lrw - Do not use auxiliary buffer")
> Cc: <stable@xxxxxxxxxxxxxxx>
> Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Acked-by: Ondrej Mosnacek <omosnace@xxxxxxxxxx>
>
> diff --git a/crypto/lrw.c b/crypto/lrw.c
> index 0430ccd08728..08a0e458bc3e 100644
> --- a/crypto/lrw.c
> +++ b/crypto/lrw.c
> @@ -212,8 +212,12 @@ static void crypt_done(struct crypto_async_request *areq, int err)
> {
> struct skcipher_request *req = areq->data;
>
> - if (!err)
> + if (!err) {
> + struct rctx *rctx = skcipher_request_ctx(req);
> +
> + rctx->subreq.base.flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
> err = xor_tweak_post(req);
> + }
>
> skcipher_request_complete(req, err);
> }
> --
> Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
> Home Page: http://gondor.apana.org.au/~herbert/
> PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
--
Ondrej Mosnacek <omosnace at redhat dot com>
Software Engineer, Security Technologies
Red Hat, Inc.
