From mboxrd@z Thu Jan 1 00:00:00 1970 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 Date: Thu, 20 Dec 2018 13:38:13 -0500 From: "Michael S. Tsirkin" Message-ID: <20181220183059.20726-10-mst@redhat.com> References: <20181220183059.20726-1-mst@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20181220183059.20726-1-mst@redhat.com> Subject: [Qemu-devel] [PULL v3 09/44] hw/pci-bridge: Fix invalid free() List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Peter Maydell , Matthias Weckbecker , Marcel Apfelbaum 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 = pci_bridge_region_init(br); memory_region_transaction_commit(); - pci_bridge_region_cleanup(br, w); } /* default write_config function for PCI-to-PCI bridge */ -- MST