* [Qemu-devel] [PATCH] pci: mark ROMs read-only
@ 2017-01-19 21:00 Michael S. Tsirkin
2017-01-23 19:07 ` Marcel Apfelbaum
2017-01-24 16:12 ` Laurent Vivier
0 siblings, 2 replies; 3+ messages in thread
From: Michael S. Tsirkin @ 2017-01-19 21:00 UTC (permalink / raw)
To: qemu-devel; +Cc: Marcel Apfelbaum
Looks like we didn't mark PCI ROMs as RO allowing
mischief such as guests writing there.
Further, e.g. vhost gets confused trying to allocate
enough space to log writes there. Fix it up.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
hw/pci/pci.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index 637d545..eaac185 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -2199,7 +2199,7 @@ static void pci_add_option_rom(PCIDevice *pdev, bool is_default_rom,
snprintf(name, sizeof(name), "%s.rom", object_get_typename(OBJECT(pdev)));
}
pdev->has_rom = true;
- memory_region_init_ram(&pdev->rom, OBJECT(pdev), name, size, &error_fatal);
+ memory_region_init_rom(&pdev->rom, OBJECT(pdev), name, size, &error_fatal);
vmstate_register_ram(&pdev->rom, &pdev->qdev);
ptr = memory_region_get_ram_ptr(&pdev->rom);
load_image(path, ptr);
--
MST
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [Qemu-devel] [PATCH] pci: mark ROMs read-only
2017-01-19 21:00 [Qemu-devel] [PATCH] pci: mark ROMs read-only Michael S. Tsirkin
@ 2017-01-23 19:07 ` Marcel Apfelbaum
2017-01-24 16:12 ` Laurent Vivier
1 sibling, 0 replies; 3+ messages in thread
From: Marcel Apfelbaum @ 2017-01-23 19:07 UTC (permalink / raw)
To: Michael S. Tsirkin, qemu-devel; +Cc: Marcel Apfelbaum
On 01/19/2017 11:00 PM, Michael S. Tsirkin wrote:
> Looks like we didn't mark PCI ROMs as RO allowing
> mischief such as guests writing there.
> Further, e.g. vhost gets confused trying to allocate
> enough space to log writes there. Fix it up.
>
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
> ---
> hw/pci/pci.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/hw/pci/pci.c b/hw/pci/pci.c
> index 637d545..eaac185 100644
> --- a/hw/pci/pci.c
> +++ b/hw/pci/pci.c
> @@ -2199,7 +2199,7 @@ static void pci_add_option_rom(PCIDevice *pdev, bool is_default_rom,
> snprintf(name, sizeof(name), "%s.rom", object_get_typename(OBJECT(pdev)));
> }
> pdev->has_rom = true;
> - memory_region_init_ram(&pdev->rom, OBJECT(pdev), name, size, &error_fatal);
> + memory_region_init_rom(&pdev->rom, OBJECT(pdev), name, size, &error_fatal);
> vmstate_register_ram(&pdev->rom, &pdev->qdev);
> ptr = memory_region_get_ram_ptr(&pdev->rom);
> load_image(path, ptr);
>
Reviewed-by: Marcel Apfelbaum <marcel@redhat.com>
Thanks,
Marcel
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [Qemu-devel] [PATCH] pci: mark ROMs read-only
2017-01-19 21:00 [Qemu-devel] [PATCH] pci: mark ROMs read-only Michael S. Tsirkin
2017-01-23 19:07 ` Marcel Apfelbaum
@ 2017-01-24 16:12 ` Laurent Vivier
1 sibling, 0 replies; 3+ messages in thread
From: Laurent Vivier @ 2017-01-24 16:12 UTC (permalink / raw)
To: Michael S. Tsirkin, qemu-devel; +Cc: Marcel Apfelbaum
On 19/01/2017 22:00, Michael S. Tsirkin wrote:
> Looks like we didn't mark PCI ROMs as RO allowing
> mischief such as guests writing there.
> Further, e.g. vhost gets confused trying to allocate
> enough space to log writes there. Fix it up.
>
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
> ---
> hw/pci/pci.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/hw/pci/pci.c b/hw/pci/pci.c
> index 637d545..eaac185 100644
> --- a/hw/pci/pci.c
> +++ b/hw/pci/pci.c
> @@ -2199,7 +2199,7 @@ static void pci_add_option_rom(PCIDevice *pdev, bool is_default_rom,
> snprintf(name, sizeof(name), "%s.rom", object_get_typename(OBJECT(pdev)));
> }
> pdev->has_rom = true;
> - memory_region_init_ram(&pdev->rom, OBJECT(pdev), name, size, &error_fatal);
> + memory_region_init_rom(&pdev->rom, OBJECT(pdev), name, size, &error_fatal);
> vmstate_register_ram(&pdev->rom, &pdev->qdev);
> ptr = memory_region_get_ram_ptr(&pdev->rom);
> load_image(path, ptr);
>
Tested-by: Laurent Vivier <lvivier@redhat.com>
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2017-01-24 16:13 UTC | newest]
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2017-01-19 21:00 [Qemu-devel] [PATCH] pci: mark ROMs read-only Michael S. Tsirkin
2017-01-23 19:07 ` Marcel Apfelbaum
2017-01-24 16:12 ` Laurent Vivier
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