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[3.19.y-ckt,stable] Patch "crypto: af_alg - Allow af_af_alg_release_parent to be called on nokey path" has been added to the 3.19.y-ckt tree

Message ID 1454029790-13269-1-git-send-email-kamal@canonical.com
State New
Headers show

Commit Message

Kamal Mostafa Jan. 29, 2016, 1:09 a.m. UTC 
This is a note to let you know that I have just added a patch titled

    crypto: af_alg - Allow af_af_alg_release_parent to be called on nokey path

to the linux-3.19.y-queue branch of the 3.19.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.19.y-queue

This patch is scheduled to be released in version 3.19.8-ckt14.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.19.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

---8<------------------------------------------------------------

From 074bd2eddcc3eca7708107739f9002c2b82a1ab9 Mon Sep 17 00:00:00 2001
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Wed, 13 Jan 2016 14:59:03 +0800
Subject: crypto: af_alg - Allow af_af_alg_release_parent to be called on nokey
 path

commit 6a935170a980024dd29199e9dbb5c4da4767a1b9 upstream.

This patch allows af_alg_release_parent to be called even for
nokey sockets.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 crypto/af_alg.c         | 9 ++++++++-
 include/crypto/if_alg.h | 1 +
 2 files changed, 9 insertions(+), 1 deletion(-)

--
1.9.1
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Patch

diff --git a/crypto/af_alg.c b/crypto/af_alg.c
index 9174cb9..4ba75e7 100644
--- a/crypto/af_alg.c
+++ b/crypto/af_alg.c
@@ -133,6 +133,12 @@  void af_alg_release_parent(struct sock *sk)
 	bool last;

 	sk = ask->parent;
+
+	if (ask->nokey_refcnt && !ask->refcnt) {
+		sock_put(sk);
+		return;
+	}
+
 	ask = alg_sk(sk);

 	lock_sock(sk);
@@ -258,8 +264,8 @@  int af_alg_accept(struct sock *sk, struct socket *newsock)
 	struct alg_sock *ask = alg_sk(sk);
 	const struct af_alg_type *type;
 	struct sock *sk2;
+	unsigned int nokey;
 	int err;
-	bool nokey;

 	lock_sock(sk);
 	type = ask->type;
@@ -292,6 +298,7 @@  int af_alg_accept(struct sock *sk, struct socket *newsock)
 		sock_hold(sk);
 	alg_sk(sk2)->parent = sk;
 	alg_sk(sk2)->type = type;
+	alg_sk(sk2)->nokey_refcnt = nokey;

 	newsock->ops = type->ops;
 	newsock->state = SS_CONNECTED;
diff --git a/include/crypto/if_alg.h b/include/crypto/if_alg.h
index 35d6494..dd1c5ac 100644
--- a/include/crypto/if_alg.h
+++ b/include/crypto/if_alg.h
@@ -31,6 +31,7 @@  struct alg_sock {
 	struct sock *parent;

 	unsigned int refcnt;
+	unsigned int nokey_refcnt;

 	const struct af_alg_type *type;
 	void *private;