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=-10.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 25A8DC2BA2B for ; Tue, 7 Apr 2020 00:05:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E56552078C for ; Tue, 7 Apr 2020 00:05:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586217902; bh=jfwCsAvjDH3ZwiE9o8OYiI+Fbo15gpdgV44F0mGIzMU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=CFNPqZ6ILl9WukWjv1k7s2t5N8fzFolMYJCulxXKvr3tkkOZbVnPFsJs8GRp6qkfq hThWcR1MlehlAfya7nCQCQPJmpXI6sYfqyr2MFYWckk7JdsKcAvOc6WWIVI4vWSGCU BStumcedn2yt6cvyf1AbHEClG7oUnpI6SPKZS4w4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728180AbgDGACn (ORCPT ); Mon, 6 Apr 2020 20:02:43 -0400 Received: from mail.kernel.org ([198.145.29.99]:37536 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728159AbgDGACk (ORCPT ); Mon, 6 Apr 2020 20:02:40 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8B97720857; Tue, 7 Apr 2020 00:02:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586217760; bh=jfwCsAvjDH3ZwiE9o8OYiI+Fbo15gpdgV44F0mGIzMU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=r24j7I6PwCWm5LIQQz7YINNCPckTpHCliEQkHL4gXG/Uk2PkxZyeYYJqDkSjcKcoN eoLuDYjmfe3WHJXp2bUYJAAgN7Ok/BCQp4iH8XWKVSmZJFWM2VIYzOPmtRKuubHSM2 1sD5ugX0zvyVXFispUXkP119T/4cfaM4P8xY0XpU= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: David Howells , Sasha Levin , linux-afs@lists.infradead.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 04/13] rxrpc: Fix sendmsg(MSG_WAITALL) handling Date: Mon, 6 Apr 2020 20:02:25 -0400 Message-Id: <20200407000234.17088-4-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200407000234.17088-1-sashal@kernel.org> References: <20200407000234.17088-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: David Howells [ Upstream commit 498b577660f08cef5d9e78e0ed6dcd4c0939e98c ] 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: Sasha Levin --- net/rxrpc/sendmsg.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/rxrpc/sendmsg.c b/net/rxrpc/sendmsg.c index 68993439e1d91..7ee72053037a3 100644 --- a/net/rxrpc/sendmsg.c +++ b/net/rxrpc/sendmsg.c @@ -75,8 +75,8 @@ static int rxrpc_wait_for_tx_window_nonintr(struct rxrpc_sock *rx, 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); -- 2.20.1