gdrdrv: fix use-after-free of variable mr in case of error

This used to crash the kernel when something went wrong.
NVIDIA · Jul 3, 2018 · 37a2e2f · 37a2e2f
1 parent 158ae88
commit 37a2e2f
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/gdrdrv/gdrdrv.c b/gdrdrv/gdrdrv.c
@@ -418,8 +418,8 @@ static int gdrdrv_pin_buffer(gdr_info_t *info, void __user *_params)
     }
 
     if (ret && mr) {
-        kfree(mr);
         memset(mr, 0, sizeof(*mr));
+        kfree(mr);
         mr = NULL;
     }