[PATCH 05/15] sign-extend mask in vm_map() with 32-bit userspace

[Luca Dariz]

* vm/vm_user.c: sign-extend mask with USER32

Signed-off-by: Luca Dariz <luca@orpolo.org>
---
 vm/vm_user.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/vm/vm_user.c b/vm/vm_user.c
index ad1fa75d..81c87d78 100644
--- a/vm/vm_user.c
+++ b/vm/vm_user.c
@@ -338,6 +338,11 @@ kern_return_t vm_map(
        if (size == 0)
                return KERN_INVALID_ARGUMENT;
 
+#ifdef USER32
+        if (mask & 0x80000000)
+            mask |= 0xffffffff00000000;
+#endif
+
        *address = trunc_page(*address);
        size = round_page(size);
 
-- 
2.30.2