| commit | 31c6c80f10a4d09fba8ad8d4c57ac2eb2bd23335 | |
| author | Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> | |
| Thu, 28 Oct 2010 18:48:10 +0000 (28 16:48 -0200) | ||
| committer | Greg Kroah-Hartman <gregkh@suse.de> | |
| Mon, 22 Nov 2010 18:47:33 +0000 (22 10:47 -0800) | ||
| tree | 23fff37dbe20f19e8cdc5c79eb7ac85028ab750a | treesnapshot (tar.gz zip) |
| parent | 004ff730b84c2f35a69871fe3bcde07232ed8610 | commitdiff |
KVM: MMU: fix direct sps access corrupted
commit 9e7b0e7fba45ca3c6357aeb7091ebc281f1de365 upstream.
If the mapping is writable but the dirty flag is not set, we will find
the read-only direct sp and setup the mapping, then if the write #PF
occur, we will mark this mapping writable in the read-only direct sp,
now, other real read-only mapping will happily write it without #PF.
It may hurt guest's COW
Fixed by re-install the mapping when write #PF occur.
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
commit 9e7b0e7fba45ca3c6357aeb7091ebc281f1de365 upstream.
If the mapping is writable but the dirty flag is not set, we will find
the read-only direct sp and setup the mapping, then if the write #PF
occur, we will mark this mapping writable in the read-only direct sp,
now, other real read-only mapping will happily write it without #PF.
It may hurt guest's COW
Fixed by re-install the mapping when write #PF occur.
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| arch/x86/kvm/paging_tmpl.h | diffblobblamehistory |