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[Qemu-devel] [PULL 1/3] cirrus_vga: adding sanity check for vram size
From: |
Gerd Hoffmann |
Subject: |
[Qemu-devel] [PULL 1/3] cirrus_vga: adding sanity check for vram size |
Date: |
Fri, 11 Jul 2014 12:24:36 +0200 |
From: Gonglei <address@hidden>
when configure a invalid vram size for cirrus card, such as less
2 MB, which will crash qemu. Follow the real hardware, the cirrus
card has 4 MB video memory. Also for backward compatibility, accept
8 MB and 16 MB vram size.
Signed-off-by: Gonglei <address@hidden>
Reviewed-by: Andreas Färber <address@hidden>
Signed-off-by: Gerd Hoffmann <address@hidden>
---
hw/display/cirrus_vga.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/hw/display/cirrus_vga.c b/hw/display/cirrus_vga.c
index 6fbe39d..52d039e 100644
--- a/hw/display/cirrus_vga.c
+++ b/hw/display/cirrus_vga.c
@@ -2911,6 +2911,14 @@ static void isa_cirrus_vga_realizefn(DeviceState *dev,
Error **errp)
ISACirrusVGAState *d = ISA_CIRRUS_VGA(dev);
VGACommonState *s = &d->cirrus_vga.vga;
+ /* follow real hardware, cirrus card emulated has 4 MB video memory.
+ Also accept 8 MB/16 MB for backward compatibility. */
+ if (s->vram_size_mb != 4 && s->vram_size_mb != 8 &&
+ s->vram_size_mb != 16) {
+ error_setg(errp, "Invalid cirrus_vga ram size '%u'",
+ s->vram_size_mb);
+ return;
+ }
vga_common_init(s, OBJECT(dev), true);
cirrus_init_common(&d->cirrus_vga, OBJECT(dev), CIRRUS_ID_CLGD5430, 0,
isa_address_space(isadev),
@@ -2957,6 +2965,14 @@ static int pci_cirrus_vga_initfn(PCIDevice *dev)
PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(dev);
int16_t device_id = pc->device_id;
+ /* follow real hardware, cirrus card emulated has 4 MB video memory.
+ Also accept 8 MB/16 MB for backward compatibility. */
+ if (s->vga.vram_size_mb != 4 && s->vga.vram_size_mb != 8 &&
+ s->vga.vram_size_mb != 16) {
+ error_report("Invalid cirrus_vga ram size '%u'",
+ s->vga.vram_size_mb);
+ return -1;
+ }
/* setup VGA */
vga_common_init(&s->vga, OBJECT(dev), true);
cirrus_init_common(s, OBJECT(dev), device_id, 1, pci_address_space(dev),
--
1.8.3.1
- [Qemu-devel] [PULL 0/3] vga: some cirrus fixes., Gerd Hoffmann, 2014/07/11
- [Qemu-devel] [PULL 1/3] cirrus_vga: adding sanity check for vram size,
Gerd Hoffmann <=
- [Qemu-devel] [PULL 2/3] cirrus: Fix build of debug code, Gerd Hoffmann, 2014/07/11
- [Qemu-devel] [PULL 3/3] cirrus: Fix host CPU blits, Gerd Hoffmann, 2014/07/11
- Re: [Qemu-devel] [PULL 3/3] cirrus: Fix host CPU blits, Peter Lieven, 2014/07/14
- Re: [Qemu-devel] [PULL 3/3] cirrus: Fix host CPU blits, Benjamin Herrenschmidt, 2014/07/14
- Re: [Qemu-devel] [PULL 3/3] cirrus: Fix host CPU blits, Benjamin Herrenschmidt, 2014/07/14
- Re: [Qemu-devel] [PULL 3/3] cirrus: Fix host CPU blits, Peter Lieven, 2014/07/14
- Re: [Qemu-devel] [PULL 3/3] cirrus: Fix host CPU blits, Gerd Hoffmann, 2014/07/14
- Re: [Qemu-devel] [PULL 3/3] cirrus: Fix host CPU blits, Peter Lieven, 2014/07/14
- Re: [Qemu-devel] [PULL 3/3] cirrus: Fix host CPU blits, Gerd Hoffmann, 2014/07/14
Re: [Qemu-devel] [PULL 0/3] vga: some cirrus fixes., Peter Maydell, 2014/07/11