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[Xen-devel] Re: [Qemu-devel] qemu/pci: Unaligned config read/write overf
| To: | qemu-devel@xxxxxxxxxx |
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| Subject: | [Xen-devel] Re: [Qemu-devel] qemu/pci: Unaligned config read/write overflow |
| From: | "andrzej zaborowski" <balrog@xxxxxxxxx> |
| Date: | Wed, 29 Nov 2006 14:51:24 +0000 |
| Cc: | Xen Development Mailing List <xen-devel@xxxxxxxxxxxxxxxxxxx>, Keir Fraser <keir@xxxxxxxxxxxxx> |
| Delivery-date: | Thu, 30 Nov 2006 05:21:41 -0800 |
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| Reply-to: | balrogg@xxxxxxxxx |
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Hi, On 28/11/06, Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> wrote: The default config read/write handlers allows a 4-byte read/write at address 255. This can clobber the field after the config area. This happens to be the PCIBus pointer in the PCIDevice structure. An easier way to prevent the clobbering is grow PCIDevice::config by three bytes. Regards, Andrew _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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