linux-kernel - [PATCH v2] kernel: audit_tree: resource management: need put

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Message-ID: <516E1F32.6010009@asianux.com>
Date:	Wed, 17 Apr 2013 12:04:02 +0800
From:	Chen Gang <gang.chen@...anux.com>
To:	Eric Paris <eparis@...hat.com>, Al Viro <viro@...iv.linux.org.uk>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH v2] kernel: audit_tree: resource management: need put_tree
 and goto Err when failure occures


  since "normally audit_add_tree_rule() will free it on failure",
  need free it completely, when failure occures.

    need additional put_tree before return, since get_tree was called.
    always need goto error processing area for list_del_init.

Signed-off-by: Chen Gang <gang.chen@...anux.com>
---
 kernel/audit_tree.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/kernel/audit_tree.c b/kernel/audit_tree.c
index 642a89c..9dfb0da 100644
--- a/kernel/audit_tree.c
+++ b/kernel/audit_tree.c
@@ -694,13 +694,15 @@ int audit_add_tree_rule(struct audit_krule *rule)
 		spin_unlock(&hash_lock);
 	} else {
 		trim_marked(tree);
+		put_tree(tree);
 		goto Err;
 	}
 
 	mutex_lock(&audit_filter_mutex);
 	if (list_empty(&rule->rlist)) {
 		put_tree(tree);
-		return -ENOENT;
+		err = -ENOENT;
+		goto Err1;
 	}
 	rule->tree = tree;
 	put_tree(tree);
@@ -708,6 +710,7 @@ int audit_add_tree_rule(struct audit_krule *rule)
 	return 0;
 Err:
 	mutex_lock(&audit_filter_mutex);
+Err1:
 	list_del_init(&tree->list);
 	list_del_init(&tree->rules);
 	put_tree(tree);
-- 
1.7.7.6
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