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=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 D3798C43603 for ; Wed, 11 Dec 2019 15:07:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A922722527 for ; Wed, 11 Dec 2019 15:07:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576076878; bh=gXARI7YL3GAncgeBJs6Fnde+C0qoulYIfCAepgl0a+g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=0ARQNzmFpqYzwK5d/8+YjQ+1xWA45yQ5vqR4PzZ8wWVlPNueouEPZTiTFFseiDubk RvxtJCvKATLse2RG8/F3iF6iMmASGfEcLTxyT2bGtS0ISg4XrqitW3C4YK/gZ6RCLd pyGa7IJ5cjkgkF5muRdFhG+r6mKVzhWkVskV50og= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730188AbfLKPH4 (ORCPT ); Wed, 11 Dec 2019 10:07:56 -0500 Received: from mail.kernel.org ([198.145.29.99]:55220 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730170AbfLKPHy (ORCPT ); Wed, 11 Dec 2019 10:07:54 -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 D39AB24654; Wed, 11 Dec 2019 15:07:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576076874; bh=gXARI7YL3GAncgeBJs6Fnde+C0qoulYIfCAepgl0a+g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DjN02p9d87S1TB63/SOGswWXArTm6HdrXcG2MdXKI7jdm03J/JgBDDIZ0tdHrX+aq Q0T5c2pVLfYGIwuCrnYHGnCDH+XQuZbmI+NCUmSrXwy5IOGVAlzfjsH7/LkYFIzYga ZAHpBbXeWSYL8cIAINsTHlsIgL4Oa8VheWikTdm4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Miklos Szeredi Subject: [PATCH 5.4 23/92] fuse: verify nlink Date: Wed, 11 Dec 2019 16:05:14 +0100 Message-Id: <20191211150229.424302645@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191211150221.977775294@linuxfoundation.org> References: <20191211150221.977775294@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 @@ -862,7 +862,8 @@ static int fuse_link(struct dentry *entr spin_lock(&fi->lock); fi->attr_version = atomic64_inc_return(&fc->attr_version); - inc_nlink(inode); + if (likely(inode->i_nlink < UINT_MAX)) + inc_nlink(inode); spin_unlock(&fi->lock); fuse_invalidate_attr(inode); fuse_update_ctime(inode);