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| author | Paolo Bonzini <pbonzini@redhat.com> | 2019-04-17 15:28:44 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-25 18:22:29 +0200 |
| commit | fb654d0763c83406347588f4544d6507c7ee51d7 (patch) | |
| tree | 47b65cda053b3ed96f48c5a3d53a1c03478a20c4 /net/lapb/lapb_timer.c | |
| parent | 497ce5c7f5387d7cc0a17c414b247b1e7ef7e288 (diff) | |
KVM: fix KVM_CLEAR_DIRTY_LOG for memory slots of unaligned size
[ Upstream commit 76d58e0f07ec203bbdfcaabd9a9fc10a5a3ed5ea ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net/lapb/lapb_timer.c')
0 files changed, 0 insertions, 0 deletions