openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity
linux/Documentation/virtual
History
Paolo Bonzini 76d58e0f07 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: 98938aa8ed ("KVM: validate userspace input in kvm_clear_dirty_log_protect()", 2019-01-02)
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
 		2019-04-30 21:22:15 +02:00
..
kvm KVM: fix KVM_CLEAR_DIRTY_LOG for memory slots of unaligned size 2019-04-30 21:22:15 +02:00
uml Documentation: Update path to sysrq.txt 2017-03-03 15:48:38 -07:00
paravirt_ops.txt virtual: Documentation: simplify and generalize paravirt_ops.txt 2015-02-13 17:15:44 +10:30