From patchwork Mon May 31 13:14:10 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 451295 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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, 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 9E8D1C47080 for ; Mon, 31 May 2021 13:23:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8138E6108D for ; Mon, 31 May 2021 13:23:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232140AbhEaNZZ (ORCPT ); Mon, 31 May 2021 09:25:25 -0400 Received: from mail.kernel.org ([198.145.29.99]:55814 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231784AbhEaNXT (ORCPT ); Mon, 31 May 2021 09:23:19 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 812AC613EA; Mon, 31 May 2021 13:19:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1622467190; bh=MMnFp0T8Q5Qa7GEVvTicWKpu6W2R1PK1VHfWtYeSJy4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tiorAll7X6fe9tDBoVHoXUEoHCabg/EMnlIwnsSN28cnOJJoh9lSANLjntYzTGd/a 32onf9jsISU3+7ip0Y4BkcJQsON1+B+D/ufI4+WoXMGmPXEvVpaFEc8kgDXwDCiqBV BZ/JNfxl/bpDJdc83LmTbEwiFONrVrCNwGj1Ew64= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Felix Fietkau , Alexander Shishkin , Andi Kleen , Jiri Olsa , Mark Rutland , Namhyung Kim , Peter Zijlstra , Sukadev Bhattiprolu , Arnaldo Carvalho de Melo Subject: [PATCH 4.9 37/66] perf jevents: Fix getting maximum number of fds Date: Mon, 31 May 2021 15:14:10 +0200 Message-Id: <20210531130637.433041731@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210531130636.254683895@linuxfoundation.org> References: <20210531130636.254683895@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Felix Fietkau commit 75ea44e356b5de8c817f821c9dd68ae329e82add upstream. On some hosts, rlim.rlim_max can be returned as RLIM_INFINITY. By casting it to int, it is interpreted as -1, which will cause get_maxfds to return 0, causing "Invalid argument" errors in nftw() calls. Fix this by casting the second argument of min() to rlim_t instead. Fixes: 80eeb67fe577 ("perf jevents: Program to convert JSON file") Signed-off-by: Felix Fietkau Cc: Alexander Shishkin Cc: Andi Kleen Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Sukadev Bhattiprolu Link: http://lore.kernel.org/lkml/20210525160758.97829-1-nbd@nbd.name Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Greg Kroah-Hartman --- tools/perf/pmu-events/jevents.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/tools/perf/pmu-events/jevents.c +++ b/tools/perf/pmu-events/jevents.c @@ -603,7 +603,7 @@ static int get_maxfds(void) struct rlimit rlim; if (getrlimit(RLIMIT_NOFILE, &rlim) == 0) - return min((int)rlim.rlim_max / 2, 512); + return min(rlim.rlim_max / 2, (rlim_t)512); return 512; }