From patchwork Tue Dec 1 08:52:14 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 335795 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7A397C83016 for ; Tue, 1 Dec 2020 09:20:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 23AA6206C0 for ; Tue, 1 Dec 2020 09:20:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="rZaNlXbq" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389489AbgLAJTe (ORCPT ); Tue, 1 Dec 2020 04:19:34 -0500 Received: from mail.kernel.org ([198.145.29.99]:47590 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389618AbgLAJKA (ORCPT ); Tue, 1 Dec 2020 04:10:00 -0500 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 68062206D8; Tue, 1 Dec 2020 09:09:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1606813760; bh=Xz7ZAgNXRZZqiaTWQSGl8K/kPFExL0zwfzesaSKfLng=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rZaNlXbqPxfxOn/nQ6MRY5LLvt2Rh45qVG98k65dEBmk27r1oKIclpgrf14uomBcf exCIXMdiqe7LhkbQIXmg9KvsAXC7K/C1VMXUJb3holCiil50Bav+wBU2eCw1xAWmBH JIOCBX0A2wvKwTmESiDA7faXWSQpxiVqfbr8SrMs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Namjae Jeon , Aurelien Aptel , Steve French Subject: [PATCH 5.9 019/152] cifs: fix a memleak with modefromsid Date: Tue, 1 Dec 2020 09:52:14 +0100 Message-Id: <20201201084714.380468831@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201201084711.707195422@linuxfoundation.org> References: <20201201084711.707195422@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Namjae Jeon commit 98128572084c3dd8067f48bb588aa3733d1355b5 upstream. kmemleak reported a memory leak allocated in query_info() when cifs is working with modefromsid. backtrace: [<00000000aeef6a1e>] slab_post_alloc_hook+0x58/0x510 [<00000000b2f7a440>] __kmalloc+0x1a0/0x390 [<000000006d470ebc>] query_info+0x5b5/0x700 [cifs] [<00000000bad76ce0>] SMB2_query_acl+0x2b/0x30 [cifs] [<000000001fa09606>] get_smb2_acl_by_path+0x2f3/0x720 [cifs] [<000000001b6ebab7>] get_smb2_acl+0x75/0x90 [cifs] [<00000000abf43904>] cifs_acl_to_fattr+0x13b/0x1d0 [cifs] [<00000000a5372ec3>] cifs_get_inode_info+0x4cd/0x9a0 [cifs] [<00000000388e0a04>] cifs_revalidate_dentry_attr+0x1cd/0x510 [cifs] [<0000000046b6b352>] cifs_getattr+0x8a/0x260 [cifs] [<000000007692c95e>] vfs_getattr_nosec+0xa1/0xc0 [<00000000cbc7d742>] vfs_getattr+0x36/0x40 [<00000000de8acf67>] vfs_statx_fd+0x4a/0x80 [<00000000a58c6adb>] __do_sys_newfstat+0x31/0x70 [<00000000300b3b4e>] __x64_sys_newfstat+0x16/0x20 [<000000006d8e9c48>] do_syscall_64+0x37/0x80 This patch add missing kfree for pntsd when mounting modefromsid option. Cc: Stable # v5.4+ Signed-off-by: Namjae Jeon Reviewed-by: Aurelien Aptel Signed-off-by: Steve French Signed-off-by: Greg Kroah-Hartman --- fs/cifs/cifsacl.c | 1 + 1 file changed, 1 insertion(+) --- a/fs/cifs/cifsacl.c +++ b/fs/cifs/cifsacl.c @@ -1266,6 +1266,7 @@ cifs_acl_to_fattr(struct cifs_sb_info *c cifs_dbg(VFS, "%s: error %d getting sec desc\n", __func__, rc); } else if (mode_from_special_sid) { rc = parse_sec_desc(cifs_sb, pntsd, acllen, fattr, true); + kfree(pntsd); } else { /* get approximated mode from ACL */ rc = parse_sec_desc(cifs_sb, pntsd, acllen, fattr, false);