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=-13.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, 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 78690C4727C for ; Tue, 29 Sep 2020 11:14:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 23A2921D41 for ; Tue, 29 Sep 2020 11:14:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601378066; bh=BvrBulDWqskHunvqNXC5RxApFO6otqoEsmBN5M0rjEE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=vrBhTWo0SCMgxDDf+BIctp5ciol/o69ICDztsIgeVXT8Hud6crcRwqdpCnBIvaTSh uOogPEAHhOPXDQyXrP9SNY8puXb+WJ+3HlD6CzxSergbr/FfIqUVF61xrKJb5SggOf Is1OE5bLWVJiWhJsGD98PhUL+X6KnGqoI4NHUhsI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728952AbgI2LOZ (ORCPT ); Tue, 29 Sep 2020 07:14:25 -0400 Received: from mail.kernel.org ([198.145.29.99]:57056 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729399AbgI2LOO (ORCPT ); Tue, 29 Sep 2020 07:14:14 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (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 BC67A221E8; Tue, 29 Sep 2020 11:14:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601378051; bh=BvrBulDWqskHunvqNXC5RxApFO6otqoEsmBN5M0rjEE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Z/m5oJY9OlEB4Gi207493srkn2goY/0vmuu/Kn9NmhlsNLAjmius0hGCP4tuRDEy0 BDejMoxQVh5/bPqBCVG9uGIN3VfAXsBQR58CJFK6MiP6j+IBPp+P6exg98UeukNQYO 5x+VrGV6jrp9QbsdxnMROSmV4dyAS6n1ShRmaUzY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Vasily Averin , "David S. Miller" , Sasha Levin Subject: [PATCH 4.14 044/166] rt_cpu_seq_next should increase position index Date: Tue, 29 Sep 2020 12:59:16 +0200 Message-Id: <20200929105937.404309998@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200929105935.184737111@linuxfoundation.org> References: <20200929105935.184737111@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Vasily Averin [ Upstream commit a3ea86739f1bc7e121d921842f0f4a8ab1af94d9 ] if seq_file .next fuction does not change position index, read after some lseek can generate unexpected output. https://bugzilla.kernel.org/show_bug.cgi?id=206283 Signed-off-by: Vasily Averin Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- net/ipv4/route.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/ipv4/route.c b/net/ipv4/route.c index ed835ca068798..6fcb12e083d99 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -276,6 +276,7 @@ static void *rt_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos) *pos = cpu+1; return &per_cpu(rt_cache_stat, cpu); } + (*pos)++; return NULL; } -- 2.25.1