linux-kernel - [PATCH 4.19 231/243] crypto: af_alg - cast ki

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Message-Id: <20191211150354.927140672@linuxfoundation.org>
Date:   Wed, 11 Dec 2019 16:06:33 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Ayush Sawal <ayush.sawal@...lsio.com>,
        Atul Gupta <atul.gupta@...lsio.com>,
        Herbert Xu <herbert@...dor.apana.org.au>
Subject: [PATCH 4.19 231/243] crypto: af_alg - cast ki_complete ternary op to int

From: Ayush Sawal <ayush.sawal@...lsio.com>

commit 64e7f852c47ce99f6c324c46d6a299a5a7ebead9 upstream.

when libkcapi test is executed  using HW accelerator, cipher operation
return -74.Since af_alg_async_cb->ki_complete treat err as unsigned int,
libkcapi receive 429467222 even though it expect -ve value.

Hence its required to cast resultlen to int so that proper
error is returned to libkcapi.

AEAD one shot non-aligned test 2(libkcapi test)
./../bin/kcapi   -x 10   -c "gcm(aes)" -i 7815d4b06ae50c9c56e87bd7
-k ea38ac0c9b9998c80e28fb496a2b88d9 -a
"853f98a750098bec1aa7497e979e78098155c877879556bb51ddeb6374cbaefc"
-t "c4ce58985b7203094be1d134c1b8ab0b" -q
"b03692f86d1b8b39baf2abb255197c98"

Fixes: d887c52d6ae4 ("crypto: algif_aead - overhaul memory management")
Cc: <stable@...r.kernel.org>
Signed-off-by: Ayush Sawal <ayush.sawal@...lsio.com>
Signed-off-by: Atul Gupta <atul.gupta@...lsio.com>
Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
Signed-off-by: Ayush Sawal <ayush.sawal@...lsio.com>
Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 crypto/af_alg.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/crypto/af_alg.c
+++ b/crypto/af_alg.c
@@ -1058,7 +1058,7 @@ void af_alg_async_cb(struct crypto_async
 	af_alg_free_resources(areq);
 	sock_put(sk);
 
-	iocb->ki_complete(iocb, err ? err : resultlen, 0);
+	iocb->ki_complete(iocb, err ? err : (int)resultlen, 0);
 }
 EXPORT_SYMBOL_GPL(af_alg_async_cb);