[PATCH 4.18 238/350] crypto: tcrypt - fix ghash-generic speed test

[Greg Kroah-Hartman]

4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Horia GeantÄ <horia.geanta@xxxxxxx>

commit 331351f89c36bf7d03561a28b6f64fa10a9f6f3a upstream.

ghash is a keyed hash algorithm, thus setkey needs to be called.
Otherwise the following error occurs:
$ modprobe tcrypt mode=318 sec=1
testing speed of async ghash-generic (ghash-generic)
tcrypt: test  0 (   16 byte blocks,   16 bytes per update,   1 updates):
tcrypt: hashing failed ret=-126

Cc: <stable@xxxxxxxxxxxxxxx> # 4.6+
Fixes: 0660511c0bee ("crypto: tcrypt - Use ahash")
Tested-by: Franck Lenormand <franck.lenormand@xxxxxxx>
Signed-off-by: Horia GeantÄ <horia.geanta@xxxxxxx>
Acked-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 crypto/tcrypt.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/crypto/tcrypt.c
+++ b/crypto/tcrypt.c
@@ -1097,6 +1097,9 @@ static void test_ahash_speed_common(cons
 			break;
 		}
 
+		if (speed[i].klen)
+			crypto_ahash_setkey(tfm, tvmem[0], speed[i].klen);
+
 		pr_info("test%3u "
 			"(%5u byte blocks,%5u bytes per update,%4u updates): ",
 			i, speed[i].blen, speed[i].plen, speed[i].blen / speed[i].plen);