linux-kernel - [PATCH 2/2] fanotify: do not leak user reference on allocation failure

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Message-Id: <1290575499-32724-2-git-send-email-eparis@redhat.com>
Date:	Wed, 24 Nov 2010 00:11:39 -0500
From:	Eric Paris <eparis@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	viro@...iv.linux.org.uk, eugene@...hat.com,
	vegard.nossum@...il.com, Eric Paris <eparis@...hat.com>
Subject: [PATCH 2/2] fanotify: do not leak user reference on allocation failure

If fanotify_init is unable to allocate a new fsnotify group it will
return but will not drop its reference on the associated user struct.
Drop that reference on error.

Reported-by: Vegard Nossum <vegard.nossum@...il.com>
Signed-off-by: Eric Paris <eparis@...hat.com>
---
 fs/notify/fanotify/fanotify_user.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index a2538b6..eddad55 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c
@@ -695,8 +695,10 @@ SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags)
 
 	/* fsnotify_alloc_group takes a ref.  Dropped in fanotify_release */
 	group = fsnotify_alloc_group(&fanotify_fsnotify_ops);
-	if (IS_ERR(group))
+	if (IS_ERR(group)) {
+		free_uid(user);
 		return PTR_ERR(group);
+	}
 
 	group->fanotify_data.user = user;
 	atomic_inc(&user->fanotify_listeners);
-- 
1.7.1

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