From patchwork Tue Apr 7 10:22:09 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: 228150 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=-6.9 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 C342EC2BB54 for ; Tue, 7 Apr 2020 10:28:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 97FE020771 for ; Tue, 7 Apr 2020 10:28:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586255315; bh=o5+VVv/NdrgfdXFjKKdDinBsvD48G4NvcvDVyOKNL5A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=S5lUmCvQ/sPU9HIjyDn7wAww4nN9Kd+x0kvu9nfIH/K1JLeCczIcdkEdoCyFnhyDx tbdkJfXVYIvMj/ETM3f+U9ZOQ20le88vLY/hvc3lU/QLPTZV+M4bUAaOShJf6UEVnS /zIjEajLlOv5cJEogjQn/6EUWfxfS+8bmBO4WGZs= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728212AbgDGK2a (ORCPT ); Tue, 7 Apr 2020 06:28:30 -0400 Received: from mail.kernel.org ([198.145.29.99]:35882 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728919AbgDGKZU (ORCPT ); Tue, 7 Apr 2020 06:25:20 -0400 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 733F82074F; Tue, 7 Apr 2020 10:25:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586255119; bh=o5+VVv/NdrgfdXFjKKdDinBsvD48G4NvcvDVyOKNL5A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XzMI/GELhSra/yZ7N9G2I3Mh0DC8bBKtu4oTvQ1RDjs5+XtnRMfd71rEkQzKVvJyU uWmSJVbs26AgPYW84ZGgMKhIEQeH2Rf01bcN/mdtwEtLvECd2j2RbL15I8/zqRNnXx vzGXpxqUoWVSufYvg75GgVLaHq7UxIxBuvT65910= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, David Howells Subject: [PATCH 5.5 38/46] rxrpc: Fix sendmsg(MSG_WAITALL) handling Date: Tue, 7 Apr 2020 12:22:09 +0200 Message-Id: <20200407101503.512089696@linuxfoundation.org> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200407101459.502593074@linuxfoundation.org> References: <20200407101459.502593074@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: David Howells commit 498b577660f08cef5d9e78e0ed6dcd4c0939e98c upstream. Fix the handling of sendmsg() with MSG_WAITALL for userspace to round the timeout for when a signal occurs up to at least two jiffies as a 1 jiffy timeout may end up being effectively 0 if jiffies wraps at the wrong time. Fixes: bc5e3a546d55 ("rxrpc: Use MSG_WAITALL to tell sendmsg() to temporarily ignore signals") Signed-off-by: David Howells Signed-off-by: Greg Kroah-Hartman --- net/rxrpc/sendmsg.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/net/rxrpc/sendmsg.c +++ b/net/rxrpc/sendmsg.c @@ -58,8 +58,8 @@ static int rxrpc_wait_for_tx_window_wait rtt = READ_ONCE(call->peer->rtt); rtt2 = nsecs_to_jiffies64(rtt) * 2; - if (rtt2 < 1) - rtt2 = 1; + if (rtt2 < 2) + rtt2 = 2; timeout = rtt2; tx_start = READ_ONCE(call->tx_hard_ack);