From patchwork Wed Dec 27 08:16:12 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shannon Zhao X-Patchwork-Id: 853092 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=nongnu.org (client-ip=2001:4830:134:3::11; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3z65LM0PyKz9sQm for ; Wed, 27 Dec 2017 19:17:12 +1100 (AEDT) Received: from localhost ([::1]:51002 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eU6th-000820-1j for incoming@patchwork.ozlabs.org; Wed, 27 Dec 2017 03:17:09 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50140) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eU6tG-00080Q-Ew for qemu-devel@nongnu.org; Wed, 27 Dec 2017 03:16:43 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eU6tF-0002qv-9g for qemu-devel@nongnu.org; Wed, 27 Dec 2017 03:16:42 -0500 Received: from [45.249.212.35] (port=58131 helo=huawei.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eU6tA-0002eQ-3w; Wed, 27 Dec 2017 03:16:36 -0500 Received: from DGGEMS404-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 8F88C97AC2694; Wed, 27 Dec 2017 16:16:29 +0800 (CST) Received: from HGHY1Z002260041.china.huawei.com (10.177.16.142) by DGGEMS404-HUB.china.huawei.com (10.3.19.204) with Microsoft SMTP Server id 14.3.361.1; Wed, 27 Dec 2017 16:16:24 +0800 From: Shannon Zhao To: , , Date: Wed, 27 Dec 2017 16:16:12 +0800 Message-ID: <1514362572-1624-1-git-send-email-zhaoshenglong@huawei.com> X-Mailer: git-send-email 1.9.0.msysgit.0 MIME-Version: 1.0 X-Originating-IP: [10.177.16.142] X-CFilter-Loop: Reflected X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 45.249.212.35 Subject: [Qemu-devel] [PATCH v2] Virt: ACPI: fix qemu assert due to re-assigned table data address 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: drjones@redhat.com, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" From: Zhaoshenglong acpi_data_push uses g_array_set_size to resize the memory size. If there is no enough contiguous memory, the address will be changed. If we use the old value, it will assert. qemu-kvm: hw/acpi/bios-linker-loader.c:214: bios_linker_loader_add_checksum: Assertion `start_offset < file->blob->len' failed.` This issue only happens in building SRAT table now but here we unify the pattern for other tables as well to avoid possible issues in the future. Signed-off-by: Zhaoshenglong --- v2: update the commit message according to Andrew's comments --- hw/arm/virt-acpi-build.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c index 3d78ff6..5901142 100644 --- a/hw/arm/virt-acpi-build.c +++ b/hw/arm/virt-acpi-build.c @@ -453,6 +453,7 @@ build_spcr(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms) AcpiSerialPortConsoleRedirection *spcr; const MemMapEntry *uart_memmap = &vms->memmap[VIRT_UART]; int irq = vms->irqmap[VIRT_UART] + ARM_SPI_BASE; + int spcr_start = table_data->len; spcr = acpi_data_push(table_data, sizeof(*spcr)); @@ -476,8 +477,8 @@ build_spcr(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms) spcr->pci_device_id = 0xffff; /* PCI Device ID: not a PCI device */ spcr->pci_vendor_id = 0xffff; /* PCI Vendor ID: not a PCI device */ - build_header(linker, table_data, (void *)spcr, "SPCR", sizeof(*spcr), 2, - NULL, NULL); + build_header(linker, table_data, (void *)(table_data->data + spcr_start), + "SPCR", table_data->len - spcr_start, 2, NULL, NULL); } static void @@ -512,8 +513,8 @@ build_srat(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms) mem_base += numa_info[i].node_mem; } - build_header(linker, table_data, (void *)srat, "SRAT", - table_data->len - srat_start, 3, NULL, NULL); + build_header(linker, table_data, (void *)(table_data->data + srat_start), + "SRAT", table_data->len - srat_start, 3, NULL, NULL); } static void @@ -522,6 +523,7 @@ build_mcfg(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms) AcpiTableMcfg *mcfg; const MemMapEntry *memmap = vms->memmap; int len = sizeof(*mcfg) + sizeof(mcfg->allocation[0]); + int mcfg_start = table_data->len; mcfg = acpi_data_push(table_data, len); mcfg->allocation[0].address = cpu_to_le64(memmap[VIRT_PCIE_ECAM].base); @@ -532,7 +534,8 @@ build_mcfg(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms) mcfg->allocation[0].end_bus_number = (memmap[VIRT_PCIE_ECAM].size / PCIE_MMCFG_SIZE_MIN) - 1; - build_header(linker, table_data, (void *)mcfg, "MCFG", len, 1, NULL, NULL); + build_header(linker, table_data, (void *)(table_data->data + mcfg_start), + "MCFG", len, 1, NULL, NULL); } /* GTDT */ @@ -651,6 +654,7 @@ build_madt(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms) static void build_fadt(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms, unsigned dsdt_tbl_offset) { + int fadt_start = table_data->len; AcpiFadtDescriptorRev5_1 *fadt = acpi_data_push(table_data, sizeof(*fadt)); unsigned xdsdt_entry_offset = (char *)&fadt->x_dsdt - table_data->data; uint16_t bootflags; @@ -681,8 +685,8 @@ static void build_fadt(GArray *table_data, BIOSLinker *linker, ACPI_BUILD_TABLE_FILE, xdsdt_entry_offset, sizeof(fadt->x_dsdt), ACPI_BUILD_TABLE_FILE, dsdt_tbl_offset); - build_header(linker, table_data, - (void *)fadt, "FACP", sizeof(*fadt), 5, NULL, NULL); + build_header(linker, table_data, (void *)(table_data->data + fadt_start), + "FACP", table_data->len - fadt_start, 5, NULL, NULL); } /* DSDT */