Patch "crypto: ahash - Fix early termination in hash walk" has been added to the 4.4-stable tree

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

crypto: ahash - Fix early termination in hash walk

to the 4.4-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-ahash-fix-early-termination-in-hash-walk.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Herbert Xu <[email protected]>
Date: Mon, 26 Mar 2018 08:53:25 +0800
Subject: crypto: ahash - Fix early termination in hash walk

From: Herbert Xu <[email protected]>

commit 900a081f6912a8985dc15380ec912752cb66025a upstream.

When we have an unaligned SG list entry where there is no leftover aligned data, the hash walk code will incorrectly return zero as if the entire SG list has been processed.

This patch fixes it by moving onto the next page instead.

---
 crypto/ahash.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

@@ -91,13 +91,14 @@ int crypto_hash_walk_done(struct crypto_
 
 	if (nbytes && walk->offset & alignmask && !err) {
 		walk->offset = ALIGN(walk->offset, alignmask + 1);
-		walk->data += walk->offset;
-
 		nbytes = min(nbytes,
 			     ((unsigned int)(PAGE_SIZE)) - walk->offset);
 		walk->entrylen -= nbytes;
 
-		return nbytes;
+		if (nbytes) {
+			walk->data += walk->offset;
+			return nbytes;
+		}
 	}
 
 	if (walk->flags & CRYPTO_ALG_ASYNC)

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/crypto-x86-cast5-avx-fix-ecb-encryption-when-long-sg-follows-short-one.patch queue-4.4/crypto-ahash-fix-early-termination-in-hash-walk.patch