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| author | Peter Xu <peterx@redhat.com> | 2019-05-08 17:15:45 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2019-05-08 13:42:53 +0200 |
| commit | 4ddc9204572c33f2eb91fbdb1d99d8078388b67d (patch) | |
| tree | 84c5b7a326c8d083289afe89f410a78c6c73d3fd /virt | |
| parent | e9c16c78503dd0482b876761d60a3d2f50ac4d86 (diff) | |
| download | lwn-4ddc9204572c33f2eb91fbdb1d99d8078388b67d.tar.gz lwn-4ddc9204572c33f2eb91fbdb1d99d8078388b67d.zip | |
KVM: Fix the bitmap range to copy during clear dirty
kvm_dirty_bitmap_bytes() will return the size of the dirty bitmap of
the memslot rather than the size of bitmap passed over from the ioctl.
Here for KVM_CLEAR_DIRTY_LOG we should only copy exactly the size of
bitmap that covers kvm_clear_dirty_log.num_pages.
Signed-off-by: Peter Xu <peterx@redhat.com>
Cc: stable@vger.kernel.org
Fixes: 2a31b9db153530df4aa02dac8c32837bf5f47019
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/kvm_main.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 53de2f946f9e..ad39c57de82d 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -1251,7 +1251,7 @@ int kvm_clear_dirty_log_protect(struct kvm *kvm, if (!dirty_bitmap) return -ENOENT; - n = kvm_dirty_bitmap_bytes(memslot); + n = ALIGN(log->num_pages, BITS_PER_LONG) / 8; if (log->first_page > memslot->npages || log->num_pages > memslot->npages - log->first_page || |