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[Qemu-devel] [PATCH] pci: mark ROMs read-only

From: Michael S. Tsirkin
Subject: [Qemu-devel] [PATCH] pci: mark ROMs read-only
Date: Thu, 19 Jan 2017 23:00:44 +0200

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 <address@hidden>
 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 
         snprintf(name, sizeof(name), "%s.rom", 
     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);

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