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| author | Paolo Bonzini <pbonzini@redhat.com> | 2019-04-17 15:28:44 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2019-04-30 21:32:19 +0200 |
| commit | 65c4189de8c1d995f6bc2cc96b22206405466b53 (patch) | |
| tree | 458839f13a2c760594db18f48c52cd9d1b267829 /block/blk.h | |
| parent | 0967fa1cd3769207cf74ae84144ce47fec65a317 (diff) | |
| download | linux-65c4189de8c1d995f6bc2cc96b22206405466b53.tar.bz2 | |
KVM: fix KVM_CLEAR_DIRTY_LOG for memory slots of unaligned size
If a memory slot's size is not a multiple of 64 pages (256K), then
the KVM_CLEAR_DIRTY_LOG API is unusable: clearing the final 64 pages
either requires the requested page range to go beyond memslot->npages,
or requires log->num_pages to be unaligned, and kvm_clear_dirty_log_protect
requires log->num_pages to be both in range and aligned.
To allow this case, allow log->num_pages not to be a multiple of 64 if
it ends exactly on the last page of the slot.
Reported-by: Peter Xu <peterx@redhat.com>
Fixes: 98938aa8edd6 ("KVM: validate userspace input in kvm_clear_dirty_log_protect()", 2019-01-02)
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'block/blk.h')
0 files changed, 0 insertions, 0 deletions