Re: [Qemu-devel] [PATCH v2 7/8] fdc: Fix MSR.RQM flag

2015-05-21 Thread John Snow
On 05/21/2015 09:19 AM, Kevin Wolf wrote: > The RQM bit in MSR should be set whenever the guest is supposed to > access the FIFO, and it should be cleared in all other cases. This is > important so the guest can't continue writing/reading the FIFO beyond > the length that it's suppossed to access

[Qemu-devel] [PATCH v2 7/8] fdc: Fix MSR.RQM flag

2015-05-21 Thread Kevin Wolf
The RQM bit in MSR should be set whenever the guest is supposed to access the FIFO, and it should be cleared in all other cases. This is important so the guest can't continue writing/reading the FIFO beyond the length that it's suppossed to access (see CVE-2015-3456). Commit e9077462 fixed the CVE