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 79ACEAD48 for ; Wed, 4 Jan 2023 16:23:54 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DB1AFC433D2; Wed, 4 Jan 2023 16:23:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1672849434; bh=kDLBUV+Ye7w3eLOQ3Co93J5anMhbj5TxHng32TQWiYg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=xCunwhS92F5CzJifL9cehNZkpO0JCF0PqCZT8wfZN0WAy7DUPHRnUFBO5K6odSn45 YUQAadlUzc8Y4AeNsiE6VvZaXSTxmmWrzAjjeOdFP/csEm8YjEE/i1sRPdSwTmOryU bQw4oD0P1fcP7R4PIMhGOKssV4t0Rawd3eY0xbk0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, stable@kernel.org, Jiaming Li , Huaxin Lu , Stefan Berger , Mimi Zohar Subject: [PATCH 6.0 097/177] ima: Fix a potential NULL pointer access in ima_restore_measurement_list Date: Wed, 4 Jan 2023 17:06:28 +0100 Message-Id: <20230104160510.575144778@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230104160507.635888536@linuxfoundation.org> References: <20230104160507.635888536@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: Huaxin Lu commit 11220db412edae8dba58853238f53258268bdb88 upstream. In restore_template_fmt, when kstrdup fails, a non-NULL value will still be returned, which causes a NULL pointer access in template_desc_init_fields. Fixes: c7d09367702e ("ima: support restoring multiple template formats") Cc: stable@kernel.org Co-developed-by: Jiaming Li Signed-off-by: Jiaming Li Signed-off-by: Huaxin Lu Reviewed-by: Stefan Berger Signed-off-by: Mimi Zohar Signed-off-by: Greg Kroah-Hartman --- security/integrity/ima/ima_template.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/security/integrity/ima/ima_template.c +++ b/security/integrity/ima/ima_template.c @@ -340,8 +340,11 @@ static struct ima_template_desc *restore template_desc->name = ""; template_desc->fmt = kstrdup(template_name, GFP_KERNEL); - if (!template_desc->fmt) + if (!template_desc->fmt) { + kfree(template_desc); + template_desc = NULL; goto out; + } spin_lock(&template_list); list_add_tail_rcu(&template_desc->list, &defined_templates);