From nobody Mon Feb 9 01:20:16 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 154533161536180.95268988203645; Thu, 20 Dec 2018 10:46:55 -0800 (PST) Received: from localhost ([::1]:39306 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ga3LR-00024h-N1 for importer@patchew.org; Thu, 20 Dec 2018 13:46:53 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59123) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ga3D8-000404-O8 for qemu-devel@nongnu.org; Thu, 20 Dec 2018 13:38:20 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ga3D6-0007O4-CH for qemu-devel@nongnu.org; Thu, 20 Dec 2018 13:38:18 -0500 Received: from mx1.redhat.com ([209.132.183.28]:48298) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ga3D6-0007MM-4T for qemu-devel@nongnu.org; Thu, 20 Dec 2018 13:38:16 -0500 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 2D9D28E67A; Thu, 20 Dec 2018 18:38:15 +0000 (UTC) Received: from redhat.com (ovpn-122-182.rdu2.redhat.com [10.10.122.182]) by smtp.corp.redhat.com (Postfix) with SMTP id 4CE4C27BDF; Thu, 20 Dec 2018 18:38:14 +0000 (UTC) Date: Thu, 20 Dec 2018 13:38:13 -0500 From: "Michael S. Tsirkin" To: qemu-devel@nongnu.org Message-ID: <20181220183059.20726-10-mst@redhat.com> References: <20181220183059.20726-1-mst@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20181220183059.20726-1-mst@redhat.com> X-Mutt-Fcc: =sent X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Thu, 20 Dec 2018 18:38:15 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL v3 09/44] hw/pci-bridge: Fix invalid free() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Matthias Weckbecker Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Matthias Weckbecker When loadvm'ing a *running* snapshot qemu crashes due to an invalid free. It's fortunately caught early by glibc heap memory corruption protection and qemu gets killed with SIGABRT. Steps to reproduce: 1) Create VM (e.g w/ virsh define) 2) Start the VM and take a snapshot while it's running and having a PCI bridge attached 3) Destroy the VM and revert the running snapshot. This commit fixes the issue. Signed-off-by: Matthias Weckbecker Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/pci/pci_bridge.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/pci/pci_bridge.c b/hw/pci/pci_bridge.c index ee9dff2d3a..b9143ac88b 100644 --- a/hw/pci/pci_bridge.c +++ b/hw/pci/pci_bridge.c @@ -241,9 +241,9 @@ void pci_bridge_update_mappings(PCIBridge *br) * while another accesses an unaffected region. */ memory_region_transaction_begin(); pci_bridge_region_del(br, br->windows); + pci_bridge_region_cleanup(br, w); br->windows =3D pci_bridge_region_init(br); memory_region_transaction_commit(); - pci_bridge_region_cleanup(br, w); } =20 /* default write_config function for PCI-to-PCI bridge */ --=20 MST