diff options
| -rw-r--r-- | drivers/virt/fsl_hypervisor.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/virt/fsl_hypervisor.c b/drivers/virt/fsl_hypervisor.c index 0742e98d6cf8..9f96c7e61387 100644 --- a/drivers/virt/fsl_hypervisor.c +++ b/drivers/virt/fsl_hypervisor.c @@ -215,6 +215,9 @@ static long ioctl_memcpy(struct fsl_hv_ioctl_memcpy __user *p) * hypervisor. */ lb_offset = param.local_vaddr & (PAGE_SIZE - 1); + if (param.count == 0 || + param.count > U64_MAX - lb_offset - PAGE_SIZE + 1) + return -EINVAL; num_pages = (param.count + lb_offset + PAGE_SIZE - 1) >> PAGE_SHIFT; /* Allocate the buffers we need */ |