From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E04601C07 for ; Wed, 28 Dec 2022 16:06:29 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 620FAC433EF; Wed, 28 Dec 2022 16:06:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1672243589; bh=Fur5jFiopM4rsM8Gi92ftfD6oHd7siyojgCUBjlYClc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NBfy1CceJtv6Tz8vy4xYB0T2uUJ8Ikb/1cro6BcI4revqqgSG0T+f9FWHkiETSnIl u7mKkfffpHwTXNXK9UEzGAFteQKrF4ZES0uQdL6VugP2XDF87GcU3si+z2p8e3I8pb 7O0H78dke6lmbFOX1vV/wFctFHrneJPRvg0KHhsQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Gaosheng Cui , John Johansen , Sasha Levin Subject: [PATCH 6.0 0553/1073] apparmor: fix a memleak in multi_transaction_new() Date: Wed, 28 Dec 2022 15:35:41 +0100 Message-Id: <20221228144343.074380780@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20221228144328.162723588@linuxfoundation.org> References: <20221228144328.162723588@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Gaosheng Cui [ Upstream commit c73275cf6834787ca090317f1d20dbfa3b7f05aa ] In multi_transaction_new(), the variable t is not freed or passed out on the failure of copy_from_user(t->data, buf, size), which could lead to a memleak. Fix this bug by adding a put_multi_transaction(t) in the error path. Fixes: 1dea3b41e84c5 ("apparmor: speed up transactional queries") Signed-off-by: Gaosheng Cui Signed-off-by: John Johansen Signed-off-by: Sasha Levin --- security/apparmor/apparmorfs.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/security/apparmor/apparmorfs.c b/security/apparmor/apparmorfs.c index d066ccc219e2..7160e7aa58b9 100644 --- a/security/apparmor/apparmorfs.c +++ b/security/apparmor/apparmorfs.c @@ -868,8 +868,10 @@ static struct multi_transaction *multi_transaction_new(struct file *file, if (!t) return ERR_PTR(-ENOMEM); kref_init(&t->count); - if (copy_from_user(t->data, buf, size)) + if (copy_from_user(t->data, buf, size)) { + put_multi_transaction(t); return ERR_PTR(-EFAULT); + } return t; } -- 2.35.1