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| author | Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> | 2010-09-17 13:13:15 -0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-09-26 17:18:33 -0700 |
| commit | 724b86b0bcd26cda145915e2991952f23e0775d2 (patch) | |
| tree | ecf13c32784f92dc3afe44cbfd9727a639fe0fdd /tools | |
| parent | aaf270ed0cb87db6a037a682a3d2f860efb32f59 (diff) | |
KVM: MMU: fix direct sp's 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>
Diffstat (limited to 'tools')
0 files changed, 0 insertions, 0 deletions