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 1CB1CC00454 for ; Wed, 11 Dec 2019 15:08:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E432D22527 for ; Wed, 11 Dec 2019 15:08:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576076882; bh=dXQVMFhSGEw7T+9WILp/lPQV9hSx1Pd5Ln5VX+6r5XQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=qRYYeHO2r8q5sXML54ukGR+MN0Mf/TWE3htzDIDgxriA5mxJF7HbXHwv06eR7eBAK +bLGWeyagJ9n3d3JebOxqMM5L5T3Uczon5RYTJMopA5T3Hnr/eqhHlmsINQ8WZZZWw VuwWi1Ez1okFm0Pdstd4Pj/rFSjOKk26xRPJWW3w= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730202AbfLKPIA (ORCPT ); Wed, 11 Dec 2019 10:08:00 -0500 Received: from mail.kernel.org ([198.145.29.99]:55278 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730170AbfLKPH5 (ORCPT ); Wed, 11 Dec 2019 10:07:57 -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 5700922B48; Wed, 11 Dec 2019 15:07:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576076876; bh=dXQVMFhSGEw7T+9WILp/lPQV9hSx1Pd5Ln5VX+6r5XQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QjzPlwOgADRY47BA3qb4pwfALONBfw4gpApi9BnTcPPrYOcGxJ0MDpCB2xkLbQKqP EXI6/MVOTa6h1vN2L1KUZwjG1iqcaBCMCTDX2FFSr2Mvaxx3kprvDkv5R9JTKDQbaF 4IaLhkQMsOvd4jUefQNC19mIo0w1WjjODsLV8e9w= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Miklos Szeredi Subject: [PATCH 5.4 24/92] fuse: verify write return Date: Wed, 11 Dec 2019 16:05:15 +0100 Message-Id: <20191211150229.716710056@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 8aab336b14c115c6bf1d4baeb9247e41ed9ce6de upstream. Make sure filesystem is not returning a bogus number of bytes written. Fixes: ea9b9907b82a ("fuse: implement perform_write") Cc: # v2.6.26 Signed-off-by: Miklos Szeredi Signed-off-by: Greg Kroah-Hartman --- fs/fuse/file.c | 2 ++ 1 file changed, 2 insertions(+) --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -1098,6 +1098,8 @@ static ssize_t fuse_send_write_pages(str ia->write.in.flags = fuse_write_flags(iocb); err = fuse_simple_request(fc, &ap->args); + if (!err && ia->write.out.size > count) + err = -EIO; offset = ap->descs[0].offset; count = ia->write.out.size;