Patch "crypto: tcrypt - avoid signed overflow in byte count" has been added to the 4.19-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    crypto: tcrypt - avoid signed overflow in byte count

to the 4.19-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     crypto-tcrypt-avoid-signed-overflow-in-byte-count.patch
and it can be found in the queue-4.19 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 601143ca0763709a34510ee6ff59a948681d36ce
Author: Ard Biesheuvel <ardb@xxxxxxxxxx>
Date:   Tue Dec 8 15:34:41 2020 +0100

    crypto: tcrypt - avoid signed overflow in byte count
    
    [ Upstream commit 303fd3e1c771077e32e96e5788817f025f0067e2 ]
    
    The signed long type used for printing the number of bytes processed in
    tcrypt benchmarks limits the range to -/+ 2 GiB, which is not sufficient
    to cover the performance of common accelerated ciphers such as AES-NI
    when benchmarked with sec=1. So switch to u64 instead.
    
    While at it, fix up a missing printk->pr_cont conversion in the AEAD
    benchmark.
    
    Signed-off-by: Ard Biesheuvel <ardb@xxxxxxxxxx>
    Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/crypto/tcrypt.c b/crypto/tcrypt.c
index d332988eb8de..bf797c613ba2 100644
--- a/crypto/tcrypt.c
+++ b/crypto/tcrypt.c
@@ -202,8 +202,8 @@ static int test_mb_aead_jiffies(struct test_mb_aead_data *data, int enc,
 			goto out;
 	}
 
-	pr_cont("%d operations in %d seconds (%ld bytes)\n",
-		bcount * num_mb, secs, (long)bcount * blen * num_mb);
+	pr_cont("%d operations in %d seconds (%llu bytes)\n",
+		bcount * num_mb, secs, (u64)bcount * blen * num_mb);
 
 out:
 	kfree(rc);
@@ -472,8 +472,8 @@ static int test_aead_jiffies(struct aead_request *req, int enc,
 			return ret;
 	}
 
-	printk("%d operations in %d seconds (%ld bytes)\n",
-	       bcount, secs, (long)bcount * blen);
+	pr_cont("%d operations in %d seconds (%llu bytes)\n",
+	        bcount, secs, (u64)bcount * blen);
 	return 0;
 }
 
@@ -763,8 +763,8 @@ static int test_mb_ahash_jiffies(struct test_mb_ahash_data *data, int blen,
 			goto out;
 	}
 
-	pr_cont("%d operations in %d seconds (%ld bytes)\n",
-		bcount * num_mb, secs, (long)bcount * blen * num_mb);
+	pr_cont("%d operations in %d seconds (%llu bytes)\n",
+		bcount * num_mb, secs, (u64)bcount * blen * num_mb);
 
 out:
 	kfree(rc);
@@ -1200,8 +1200,8 @@ static int test_mb_acipher_jiffies(struct test_mb_skcipher_data *data, int enc,
 			goto out;
 	}
 
-	pr_cont("%d operations in %d seconds (%ld bytes)\n",
-		bcount * num_mb, secs, (long)bcount * blen * num_mb);
+	pr_cont("%d operations in %d seconds (%llu bytes)\n",
+		bcount * num_mb, secs, (u64)bcount * blen * num_mb);
 
 out:
 	kfree(rc);
@@ -1438,8 +1438,8 @@ static int test_acipher_jiffies(struct skcipher_request *req, int enc,
 			return ret;
 	}
 
-	pr_cont("%d operations in %d seconds (%ld bytes)\n",
-		bcount, secs, (long)bcount * blen);
+	pr_cont("%d operations in %d seconds (%llu bytes)\n",
+		bcount, secs, (u64)bcount * blen);
 	return 0;
 }