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-rw-r--r--drivers/virt/vboxguest/vboxguest_linux.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/virt/vboxguest/vboxguest_linux.c b/drivers/virt/vboxguest/vboxguest_linux.c
index 398d22693234..6e2a9619192d 100644
--- a/drivers/virt/vboxguest/vboxguest_linux.c
+++ b/drivers/virt/vboxguest/vboxguest_linux.c
@@ -121,7 +121,9 @@ static long vbg_misc_device_ioctl(struct file *filp, unsigned int req,
if (!buf)
return -ENOMEM;
- if (copy_from_user(buf, (void *)arg, hdr.size_in)) {
+ *((struct vbg_ioctl_hdr *)buf) = hdr;
+ if (copy_from_user(buf + sizeof(hdr), (void *)arg + sizeof(hdr),
+ hdr.size_in - sizeof(hdr))) {
ret = -EFAULT;
goto out;
}