arch_vm member of struct acrn_vm is page aligned. memset used in create_vm
subtracts only 8 bytes, sizeof(spinlock_t) from the size of acrn_vm and uses
the vm->arch_vm as the destination address. To do it right, it should subtract
4096 bytes. This would result in writing memory beyond the acrn_vm struct.
This patch fixes the issue by using offsetof compiler macro and subtracts the
right amount of size corresponding to the beginning of arch_vm member in
struct acrn_vm.
Tracked-On: #5107
Signed-off-by: Sainath Grandhi <sainath.grandhi@intel.com>
9251c7bee3