From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Mon, 15 Apr 2019 06:37:34 +0000 (+0800)
Subject: crypto: lrw - Fix atomic sleep when walking skcipher
X-Git-Tag: v5.4-rc1~1188^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b257b48cd5830c5b1d0c347eb281f9c28056f881;p=platform%2Fkernel%2Flinux-rpi.git

crypto: lrw - Fix atomic sleep when walking skcipher

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@vger.kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Ondrej Mosnacek <omosnace@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

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);
 }