The parameters start and size are transfered from QEMU memory
emulation layer. It can promise that they are TARGET_PAGE_SIZE
aligned. However, KVM needs they are qemu_real_page_size aligned.
Though no caller breaks this aligned requirement currently, we'd
better add an explicit check to avoid future breaking.
Signed-off-by: Keqian Zhu <zhukeqi...@huawei.com>
---
accel/kvm/kvm-all.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index c5e06288eb..3d0e3aa872 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -701,6 +701,11 @@ static int kvm_log_clear_one_slot(KVMSlot *mem, int as_id,
uint64_t start,
unsigned long *bmap_clear = NULL, psize = qemu_real_host_page_size;
int ret;
+ /* Make sure start and size are psize aligned */
+ if (!QEMU_IS_ALIGNED(start, psize) || !QEMU_IS_ALIGNED(size, psize)) {
+ return -EINVAL;
+ }
+
/*
* We need to extend either the start or the size or both to
* satisfy the KVM interface requirement. Firstly, do the start
--
2.23.0
