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 96610C4727C for ; Tue, 29 Sep 2020 11:08:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 49FE221D43 for ; Tue, 29 Sep 2020 11:08:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601377716; bh=36ND2MmTltSqR4U5avLiXByONROkFkTO7XP6GSV8vrA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=PYBzlGusxvupmPhytOUTx/VwIfzJ+lIxr2XfqFkLfhO3GbzjZPgqOY14qSDeSrlbW Jw9AgvbM6hYqVoTq3inppoB+7P/ZYH130o1pNDrOQc47BbV2LyVWJgMZE+AWT6oS9x XJLQ+g5gzbcLeSG5juWASEHEgwVQbfguDmV5Hp80= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728469AbgI2LIf (ORCPT ); Tue, 29 Sep 2020 07:08:35 -0400 Received: from mail.kernel.org ([198.145.29.99]:46580 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728978AbgI2LHz (ORCPT ); Tue, 29 Sep 2020 07:07:55 -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 31BBA21D7F; Tue, 29 Sep 2020 11:07:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601377674; bh=36ND2MmTltSqR4U5avLiXByONROkFkTO7XP6GSV8vrA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PdhRIVhuDGwOUqJZJ3Cgra7n50GZn0x3bjxDOpuOq36d1kSd48u7BxRWacNljzqi3 XfyfdvZ2ix7KRd64aZAWIH8+WXE9JwRPPl2h3t2uOhkoAsF+ZlWK2j6QlkIWfz54Ks M6Szsj5gjtO5hB6v414bQzA3hwyxngd4A/s16t74= 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 4.9 031/121] neigh_stat_seq_next() should increase position index Date: Tue, 29 Sep 2020 12:59:35 +0200 Message-Id: <20200929105931.722066488@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200929105930.172747117@linuxfoundation.org> References: <20200929105930.172747117@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: stable@vger.kernel.org From: Vasily Averin [ Upstream commit 1e3f9f073c47bee7c23e77316b07bc12338c5bba ] 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/core/neighbour.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/core/neighbour.c b/net/core/neighbour.c index 6578d1f8e6c4a..d267dc04d9f74 100644 --- a/net/core/neighbour.c +++ b/net/core/neighbour.c @@ -2797,6 +2797,7 @@ static void *neigh_stat_seq_next(struct seq_file *seq, void *v, loff_t *pos) *pos = cpu+1; return per_cpu_ptr(tbl->stats, cpu); } + (*pos)++; return NULL; } -- 2.25.1