From mboxrd@z Thu Jan 1 00:00:00 1970 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=-7.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 C38EFC43441 for ; Mon, 19 Nov 2018 16:32:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8BEBC20870 for ; Mon, 19 Nov 2018 16:32:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="XYj2wupN" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8BEBC20870 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730646AbeKTC4O (ORCPT ); Mon, 19 Nov 2018 21:56:14 -0500 Received: from mail.kernel.org ([198.145.29.99]:54326 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729979AbeKTC4O (ORCPT ); Mon, 19 Nov 2018 21:56:14 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.ziggo.nl [83.86.89.107]) (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 A68AF20831; Mon, 19 Nov 2018 16:32:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1542645127; bh=RhTKSX7cAXXjN/I4gV5xDcfOZzBieRqWLKYrueZ1UPk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XYj2wupNPes3jLWLbxc35HPCI9CF7dbU2YXMicn81RHmdFeq7AhZ4BiAjxRxKQvii 5NesjAfcwKsfxGscBDb4JWc61ynACuYl1lXW+tVnL8B2nCQhwLsVbAiYMFUMd4b+Wa Me53yDcvl82xuBZNQKmSSaJZ6BRDCCcMrXameAfY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, syzbot+ff03fe05c717b82502d0@syzkaller.appspotmail.com, Amir Goldstein , Miklos Szeredi Subject: [PATCH 4.19 046/205] ovl: fix error handling in ovl_verify_set_fh() Date: Mon, 19 Nov 2018 17:25:53 +0100 Message-Id: <20181119162625.590450047@linuxfoundation.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181119162616.586062722@linuxfoundation.org> References: <20181119162616.586062722@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Amir Goldstein commit babf4770be0adc69e6d2de150f4040f175e24beb upstream. We hit a BUG on kfree of an ERR_PTR()... Reported-by: syzbot+ff03fe05c717b82502d0@syzkaller.appspotmail.com Fixes: 8b88a2e64036 ("ovl: verify upper root dir matches lower root dir") Cc: # v4.13 Signed-off-by: Amir Goldstein Signed-off-by: Miklos Szeredi Signed-off-by: Greg Kroah-Hartman --- fs/overlayfs/namei.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/fs/overlayfs/namei.c +++ b/fs/overlayfs/namei.c @@ -422,8 +422,10 @@ int ovl_verify_set_fh(struct dentry *den fh = ovl_encode_real_fh(real, is_upper); err = PTR_ERR(fh); - if (IS_ERR(fh)) + if (IS_ERR(fh)) { + fh = NULL; goto fail; + } err = ovl_verify_fh(dentry, name, fh); if (set && err == -ENODATA)