This is a note to let you know that I've just added the patch titled
crypto: algif_aead - Do not set MAY_BACKLOG on the async path
to the 4.9-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_aead-do-not-set-may_backlog-on-the-async-path.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From cbdad1f246dd98e6c9c32a6e5212337f542aa7e0 Mon Sep 17 00:00:00 2001
From: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Date: Fri, 31 Jul 2020 17:03:50 +1000
Subject: crypto: algif_aead - Do not set MAY_BACKLOG on the async path
From: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
commit cbdad1f246dd98e6c9c32a6e5212337f542aa7e0 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.
Fixes: 83094e5e9e49 ("crypto: af_alg - add async support to...")
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
crypto/algif_aead.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/crypto/algif_aead.c
+++ b/crypto/algif_aead.c
@@ -455,7 +455,7 @@ static int aead_recvmsg_async(struct soc
memcpy(areq->iv, ctx->iv, crypto_aead_ivsize(tfm));
aead_request_set_tfm(req, tfm);
aead_request_set_ad(req, ctx->aead_assoclen);
- aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
+ aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_SLEEP,
aead_async_cb, req);
used -= ctx->aead_assoclen;
@@ -925,7 +925,7 @@ static int aead_accept_parent_nokey(void
ask->private = ctx;
aead_request_set_tfm(&ctx->aead_req, aead);
- aead_request_set_callback(&ctx->aead_req, CRYPTO_TFM_REQ_MAY_BACKLOG,
+ aead_request_set_callback(&ctx->aead_req, CRYPTO_TFM_REQ_MAY_SLEEP,
af_alg_complete, &ctx->completion);
sk->sk_destruct = aead_sock_destruct;
Patches currently in stable-queue which might be from herbert@xxxxxxxxxxxxxxxxxxx are
queue-4.9/crypto-algif_aead-do-not-set-may_backlog-on-the-async-path.patch
