From owner-freebsd-bugs@FreeBSD.ORG Mon Oct 17 20:00:30 2011 Return-Path: Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 0E30E10656F0 for ; Mon, 17 Oct 2011 20:00:30 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id CB9CA8FC13 for ; Mon, 17 Oct 2011 20:00:26 +0000 (UTC) Received: from freefall.freebsd.org (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.4/8.14.4) with ESMTP id p9HK0QcZ004958 for ; Mon, 17 Oct 2011 20:00:26 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.4/8.14.4/Submit) id p9HK0QHl004957; Mon, 17 Oct 2011 20:00:26 GMT (envelope-from gnats) Resent-Date: Mon, 17 Oct 2011 20:00:26 GMT Resent-Message-Id: <201110172000.p9HK0QHl004957@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-bugs@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Arnaud Lacombe Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 16FC61065672 for ; Mon, 17 Oct 2011 19:57:51 +0000 (UTC) (envelope-from nobody@FreeBSD.org) Received: from red.freebsd.org (red.freebsd.org [IPv6:2001:4f8:fff6::22]) by mx1.freebsd.org (Postfix) with ESMTP id 029208FC0C for ; Mon, 17 Oct 2011 19:57:51 +0000 (UTC) Received: from red.freebsd.org (localhost [127.0.0.1]) by red.freebsd.org (8.14.4/8.14.4) with ESMTP id p9HJvo8L091468 for ; Mon, 17 Oct 2011 19:57:50 GMT (envelope-from nobody@red.freebsd.org) Received: (from nobody@localhost) by red.freebsd.org (8.14.4/8.14.4/Submit) id p9HJvoRh091465; Mon, 17 Oct 2011 19:57:50 GMT (envelope-from nobody) Message-Id: <201110171957.p9HJvoRh091465@red.freebsd.org> Date: Mon, 17 Oct 2011 19:57:50 GMT From: Arnaud Lacombe To: freebsd-gnats-submit@FreeBSD.org X-Send-Pr-Version: www-3.1 Cc: Subject: kern/161755: Kernel fails to report negative malloc type statistics X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 17 Oct 2011 20:00:30 -0000 >Number: 161755 >Category: kern >Synopsis: Kernel fails to report negative malloc type statistics >Confidential: no >Severity: non-critical >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Mon Oct 17 20:00:26 UTC 2011 >Closed-Date: >Last-Modified: >Originator: Arnaud Lacombe >Release: 10-current >Organization: n/a >Environment: >Description: When malloc-type are uninit, a verification is made to ensure that no memory has been leaked, however, it fails to report if memory allocation have been badly accounted (ie `malloc(X, M_FOO)' followed by `free(Y, M_BAR)'). from `sys/kern/kern_malloc.c': if (temp_allocs > 0 || temp_bytes > 0) { printf("Warning: memory type %s leaked memory on destroy " "(%ld allocations, %ld bytes leaked).\n", mtp->ks_shortdesc, this do not report whenever `temp_allocs' or `temp_bytes' are negative, which should be reported, else, whatever is printed can not be trusted. >How-To-Repeat: >Fix: Patch available at: https://github.com/lacombar/freebsd/commit/8b498200a0389ec48021959e32eaf198c075b6ca >Release-Note: >Audit-Trail: >Unformatted: