From patchwork Thu Oct 10 08:35:00 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 11182975 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 147381709 for ; Thu, 10 Oct 2019 09:01:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E91282246A for ; Thu, 10 Oct 2019 09:01:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570698104; bh=zws2NfICo8i79kq3giIGcUyMD4BfkP5hx0wv0zz3sis=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=OYK71syuctwB685O2l4ILSOnyDHwtHayY6Kfcgwg6EU6iswzzUC3v3eJ77V1uLA72 mWzDFmxPaMwtv/5PYs1RifRMAnWNGegz5iPOFufQEwSA0UTg8LTrMunZZCv9MyPOU7 43BmZSpc0i4Ml70gyknTnqgB0xCLki73pxkmEHpQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388286AbfJJIlP (ORCPT ); Thu, 10 Oct 2019 04:41:15 -0400 Received: from mail.kernel.org ([198.145.29.99]:45590 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388281AbfJJIlP (ORCPT ); Thu, 10 Oct 2019 04:41:15 -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 1085522479; Thu, 10 Oct 2019 08:41:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570696873; bh=zws2NfICo8i79kq3giIGcUyMD4BfkP5hx0wv0zz3sis=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Dybwz2l6+SRIw0z312H5R5EjoNdcGSxnC5HEx9lzuEAd1b2rL5EiUYphim8kXJ3Cm Xybgwte68gm1sDaWhllRc/GrNGwuJM9HT7o0zkzX+/X65R7v/H7CSHmpz/ebDoOTQc 171/0tyD9f0A/0iPV2ojj5te0CRhkIXU9E4G3TYA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, "Steven Rostedt (VMware)" , Andrew Morton , Jiri Olsa , Namhyung Kim , linux-trace-devel@vger.kernel.org, Arnaldo Carvalho de Melo Subject: [PATCH 5.3 039/148] tools lib traceevent: Do not free tep->cmdlines in add_new_comm() on failure Date: Thu, 10 Oct 2019 10:35:00 +0200 Message-Id: <20191010083613.518791014@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191010083609.660878383@linuxfoundation.org> References: <20191010083609.660878383@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: linux-trace-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org From: Steven Rostedt (VMware) commit b0215e2d6a18d8331b2d4a8b38ccf3eff783edb1 upstream. If the re-allocation of tep->cmdlines succeeds, then the previous allocation of tep->cmdlines will be freed. If we later fail in add_new_comm(), we must not free cmdlines, and also should assign tep->cmdlines to the new allocation. Otherwise when freeing tep, the tep->cmdlines will be pointing to garbage. Fixes: a6d2a61ac653a ("tools lib traceevent: Remove some die() calls") Signed-off-by: Steven Rostedt (VMware) Cc: Andrew Morton Cc: Jiri Olsa Cc: Namhyung Kim Cc: linux-trace-devel@vger.kernel.org Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/20190828191819.970121417@goodmis.org Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Greg Kroah-Hartman --- tools/lib/traceevent/event-parse.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) --- a/tools/lib/traceevent/event-parse.c +++ b/tools/lib/traceevent/event-parse.c @@ -269,10 +269,10 @@ static int add_new_comm(struct tep_handl errno = ENOMEM; return -1; } + tep->cmdlines = cmdlines; cmdlines[tep->cmdline_count].comm = strdup(comm); if (!cmdlines[tep->cmdline_count].comm) { - free(cmdlines); errno = ENOMEM; return -1; } @@ -283,7 +283,6 @@ static int add_new_comm(struct tep_handl tep->cmdline_count++; qsort(cmdlines, tep->cmdline_count, sizeof(*cmdlines), cmdline_cmp); - tep->cmdlines = cmdlines; return 0; }