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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 28066C00454 for ; Wed, 11 Dec 2019 15:26:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F074722527 for ; Wed, 11 Dec 2019 15:26:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576077961; bh=11YfEesQ22zjzVX7b1esNFekBN6+1CBi/OhlK+DC5tk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=xFtBZXPvR6xDl154YQdVRbtDYbf470M0IobWQ98AjxPQsTYrHvvUWm+Ce3EUM2A5a QMn9eTqRFt2TvmVR5gKO0FOK1tvA9aP9cgnOPXmaP8xbsBix7y4cgskoio955yjRq+ R29rty5KpiXXQctiqJqCAfCLCMh82qUb05s2bs88= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733065AbfLKPZ7 (ORCPT ); Wed, 11 Dec 2019 10:25:59 -0500 Received: from mail.kernel.org ([198.145.29.99]:58610 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733055AbfLKPZz (ORCPT ); Wed, 11 Dec 2019 10:25:55 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.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 77068222C4; Wed, 11 Dec 2019 15:25:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576077954; bh=11YfEesQ22zjzVX7b1esNFekBN6+1CBi/OhlK+DC5tk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Gt+EiS21PKDFeCbafjyeilspj+7WkVPSFL77DY3ZA3h926L+kje14qEhMzOzZChfL QBfh+U57VBIyHM7v8VQiJLH+tXs8asq4OxzsQ+Og7C1rPlPFISS35JLBmZ31fvA1f9 hTtiZbkC4tTgD/U0OacRSUU3bbSgmNU91GkQYZqQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Miklos Szeredi Subject: [PATCH 4.19 197/243] fuse: verify nlink Date: Wed, 11 Dec 2019 16:05:59 +0100 Message-Id: <20191211150352.477406642@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191211150339.185439726@linuxfoundation.org> References: <20191211150339.185439726@linuxfoundation.org> User-Agent: quilt/0.66 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 From: Miklos Szeredi commit c634da718db9b2fac201df2ae1b1b095344ce5eb upstream. When adding a new hard link, make sure that i_nlink doesn't overflow. Fixes: ac45d61357e8 ("fuse: fix nlink after unlink") Cc: # v3.4 Signed-off-by: Miklos Szeredi Signed-off-by: Greg Kroah-Hartman --- fs/fuse/dir.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -837,7 +837,8 @@ static int fuse_link(struct dentry *entr spin_lock(&fc->lock); fi->attr_version = ++fc->attr_version; - inc_nlink(inode); + if (likely(inode->i_nlink < UINT_MAX)) + inc_nlink(inode); spin_unlock(&fc->lock); fuse_invalidate_attr(inode); fuse_update_ctime(inode);