crypto: testmgr - Validate output length in (de)compression tests

When self-testing (de)compression algorithms, make sure the actual size of
the (de)compressed output data matches the expected output size.
Otherwise, in case the actual output size would be smaller than the expected
output size, the subsequent buffer compare test would still succeed, and no
error would be reported.
Signed-off-by: NGeert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

crypto/testmgr.c

@@ -843,6 +843,14 @@ static int test_comp(struct crypto_comp *tfm, struct comp_testvec *ctemplate,
 			goto out;
 		}
 
+		if (dlen != ctemplate[i].outlen) {
+			printk(KERN_ERR "alg: comp: Compression test %d "
+			       "failed for %s: output len = %d\n", i + 1, algo,
+			       dlen);
+			ret = -EINVAL;
+			goto out;
+		}
+
 		if (memcmp(result, ctemplate[i].output, dlen)) {
 			printk(KERN_ERR "alg: comp: Compression test %d "
 			       "failed for %s\n", i + 1, algo);
@@ -867,6 +875,14 @@ static int test_comp(struct crypto_comp *tfm, struct comp_testvec *ctemplate,
 			goto out;
 		}
 
+		if (dlen != dtemplate[i].outlen) {
+			printk(KERN_ERR "alg: comp: Decompression test %d "
+			       "failed for %s: output len = %d\n", i + 1, algo,
+			       dlen);
+			ret = -EINVAL;
+			goto out;
+		}
+
 		if (memcmp(result, dtemplate[i].output, dlen)) {
 			printk(KERN_ERR "alg: comp: Decompression test %d "
 			       "failed for %s\n", i + 1, algo);