From owner-svn-src-stable@freebsd.org Fri May 13 08:46:14 2016 Return-Path: Delivered-To: svn-src-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 71F1CB39CBA; Fri, 13 May 2016 08:46:14 +0000 (UTC) (envelope-from ngie@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 441A41DF3; Fri, 13 May 2016 08:46:14 +0000 (UTC) (envelope-from ngie@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id u4D8kDTJ068470; Fri, 13 May 2016 08:46:13 GMT (envelope-from ngie@FreeBSD.org) Received: (from ngie@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id u4D8kDC0068469; Fri, 13 May 2016 08:46:13 GMT (envelope-from ngie@FreeBSD.org) Message-Id: <201605130846.u4D8kDC0068469@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: ngie set sender to ngie@FreeBSD.org using -f From: Garrett Cooper Date: Fri, 13 May 2016 08:46:13 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org Subject: svn commit: r299626 - stable/9/sys/kern X-SVN-Group: stable-9 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 May 2016 08:46:14 -0000 Author: ngie Date: Fri May 13 08:46:13 2016 New Revision: 299626 URL: https://svnweb.freebsd.org/changeset/base/299626 Log: MFstable/10 r299625: MFC r298677: r298677 (by cem): subr_mbpool: Don't free bogus pointer in error paths An mbpool is allocated with a contiguous array of mbpages. Freeing an individual mbpage has never been valid. Don't do it. This bug has been present since this code was introduced in r117624 (2003). CID: 1009687 Modified: stable/9/sys/kern/subr_mbpool.c Directory Properties: stable/9/ (props changed) stable/9/sys/ (props changed) Modified: stable/9/sys/kern/subr_mbpool.c ============================================================================== --- stable/9/sys/kern/subr_mbpool.c Fri May 13 08:44:59 2016 (r299625) +++ stable/9/sys/kern/subr_mbpool.c Fri May 13 08:46:13 2016 (r299626) @@ -209,16 +209,13 @@ mbp_alloc_page(struct mbpool *p) pg = &p->pages[p->npages]; error = bus_dmamem_alloc(p->dmat, &pg->va, BUS_DMA_NOWAIT, &pg->map); - if (error != 0) { - free(pg, M_MBPOOL); + if (error != 0) return; - } error = bus_dmamap_load(p->dmat, pg->map, pg->va, p->page_size, mbp_callback, &pg->phy, 0); if (error != 0) { bus_dmamem_free(p->dmat, pg->va, pg->map); - free(pg, M_MBPOOL); return; }