From efca44b82b8fb6f732f224d9768f4ffc8acf894e Mon Sep 17 00:00:00 2001
From: Doug Ledford <dledford@redhat.com>
Date: Thu, 17 Nov 2011 10:41:08 +1100
Subject: [PATCH] ipc/mqueue: enforce hard limits

In two places we don't enforce the hard limits for CAP_SYS_RESOURCE apps.
In preparation for making more reasonable hard limits, start enforcing
them even on CAP_SYS_RESOURCE.

Signed-off-by: Doug Ledford <dledford@redhat.com>
Cc: Amerigo Wang <amwang@redhat.com>
Cc: Serge E. Hallyn <serue@us.ibm.com>
Cc: Joe Korty <joe.korty@ccur.com>
Cc: Manfred Spraul <manfred@colorfullife.com>
Cc: <stable@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
 ipc/mqueue.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index 7394468cde43..b9492556fd88 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -310,8 +310,9 @@ static int mqueue_create(struct inode *dir, struct dentry *dentry,
 		error = -EACCES;
 		goto out_unlock;
 	}
-	if (ipc_ns->mq_queues_count >= ipc_ns->mq_queues_max &&
-			!capable(CAP_SYS_RESOURCE)) {
+	if (ipc_ns->mq_queues_count >= HARD_QUEUESMAX ||
+	    (ipc_ns->mq_queues_count >= ipc_ns->mq_queues_max &&
+	     !capable(CAP_SYS_RESOURCE))) {
 		error = -ENOSPC;
 		goto out_unlock;
 	}
@@ -591,7 +592,8 @@ static int mq_attr_ok(struct ipc_namespace *ipc_ns, struct mq_attr *attr)
 	if (attr->mq_maxmsg <= 0 || attr->mq_msgsize <= 0)
 		return 0;
 	if (capable(CAP_SYS_RESOURCE)) {
-		if (attr->mq_maxmsg > HARD_MSGMAX)
+		if (attr->mq_maxmsg > HARD_MSGMAX ||
+		    attr->mq_msgsize > HARD_MSGSIZEMAX)
 			return 0;
 	} else {
 		if (attr->mq_maxmsg > ipc_ns->mq_msg_max ||
-- 
2.39.5