Patch "crypto: algif_skcipher - Do not set MAY_BACKLOG on the async path" has been added to the 4.3-stable tree

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

crypto: algif_skcipher - Do not set MAY_BACKLOG on the async path

to the 4.3-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-algif_skcipher-do-not-set-may_backlog-on-the-async-path.patch
and it can be found in the queue-4.3 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: Wed, 3 Feb 2016 21:39:27 +0800
Subject: crypto: algif_skcipher - Do not set MAY_BACKLOG on the async path

From: Herbert Xu <[email protected]>

commit dad41997063723eaf5f77bc2015606a5a9bce320 upstream.

The async path cannot use MAY_BACKLOG because it is not meant to block, which is what MAY_BACKLOG does. On the other hand, both the sync and async paths can make use of MAY_SLEEP.

---
 crypto/algif_skcipher.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

@@ -536,7 +536,7 @@ static int skcipher_recvmsg_async(struct
 	sg_init_table(sreq->tsg, tx_nents);
 	memcpy(iv, ctx->iv, ivsize);
 	skcipher_request_set_tfm(req, tfm);
-	skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
+	skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_SLEEP,
 				      skcipher_async_cb, sreq);
 
 	while (iov_iter_count(&msg->msg_iter)) {

@@ -950,7 +950,8 @@ static int skcipher_accept_parent_nokey(
 	ask->private = ctx;
 
 	skcipher_request_set_tfm(&ctx->req, skcipher);
-	skcipher_request_set_callback(&ctx->req, CRYPTO_TFM_REQ_MAY_BACKLOG,
+	skcipher_request_set_callback(&ctx->req, CRYPTO_TFM_REQ_MAY_SLEEP |
+						 CRYPTO_TFM_REQ_MAY_BACKLOG,
 				      af_alg_complete, &ctx->completion);
 
 	sk->sk_destruct = skcipher_sock_destruct;

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

queue-4.3/crypto-fix-test-vector-for-rsa.patch queue-4.3/crypto-algif_skcipher-use-new-skcipher-interface.patch queue-4.3/crypto-af_alg-disallow-bind-setkey-...-after-accept-2.patch queue-4.3/crypto-crc32c-fix-crc32c-soft-dependency.patch queue-4.3/crypto-af_alg-forbid-bind-2-when-nokey-child-sockets-are-present.patch queue-4.3/crypto-crc32c-pclmul-use-.rodata-instead-of-.rotata.patch queue-4.3/crypto-caam-fix-non-block-aligned-hash-calculation.patch queue-4.3/crypto-nx-fix-timing-leak-in-gcm-and-ccm-decryption.patch queue-4.3/crypto-skcipher-copy-iv-from-desc-even-for-0-len-walks.patch queue-4.3/crypto-algif_hash-fix-race-condition-in-hash_check_key.patch queue-4.3/crypto-skcipher-add-crypto_skcipher_has_setkey.patch queue-4.3/crypto-chacha20-ssse3-align-stack-pointer-to-64-bytes.patch queue-4.3/crypto-algif_skcipher-add-key-check-exception-for-cipher_null.patch queue-4.3/crypto-algif_skcipher-do-not-assume-that-req-is-unchanged.patch queue-4.3/crypto-algif_hash-remove-custom-release-parent-function.patch queue-4.3/crypto-algif_skcipher-load-tx-sg-list-after-waiting.patch queue-4.3/crypto-algif_skcipher-require-setkey-before-accept-2.patch queue-4.3/crypto-user-lock-crypto_alg_list-on-alg-dump.patch queue-4.3/crypto-marvell-cesa-fix-test-in-mv_cesa_dev_dma_init.patch queue-4.3/crypto-algif_skcipher-add-nokey-compatibility-path.patch queue-4.3/crypto-shash-fix-has_key-setting.patch queue-4.3/crypto-algif_skcipher-do-not-dereference-ctx-without-socket-lock.patch queue-4.3/crypto-algif_skcipher-remove-custom-release-parent-function.patch queue-4.3/crypto-af_alg-allow-af_af_alg_release_parent-to-be-called-on-nokey-path.patch queue-4.3/crypto-hash-add-crypto_ahash_has_setkey.patch queue-4.3/crypto-af_alg-add-nokey-compatibility-path.patch queue-4.3/crypto-algif_skcipher-do-not-set-may_backlog-on-the-async-path.patch queue-4.3/crypto-sun4i-ss-add-missing-statesize.patch queue-4.3/crypto-algif_hash-require-setkey-before-accept-2.patch queue-4.3/crypto-algif_skcipher-sendmsg-sg-marking-is-off-by-one.patch queue-4.3/crypto-qat-don-t-use-userspace-pointer.patch queue-4.3/crypto-talitos-fix-timing-leak-in-esp-icv-verification.patch queue-4.3/crypto-algif_hash-only-export-and-import-on-sockets-with-data.patch queue-4.3/crypto-algif_skcipher-fix-race-condition-in-skcipher_check_key.patch queue-4.3/crypto-algif_hash-wait-for-crypto_ahash_init-to-complete.patch queue-4.3/crypto-caam-make-write-transactions-bufferable-on-ppc-platforms.patch queue-4.3/crypto-af_alg-fix-socket-double-free-when-accept-fails.patch