kernel: device: Harden cdev mmap() bounds checks

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/sys/vm/vm_map.c b/sys/vm/vm_map.c
index 112f4b0..a3a6f39 100644
--- a/sys/vm/vm_map.c
+++ b/sys/vm/vm_map.c
@@ -216,7 +216,7 @@ mmap(void *addr, size_t len, int prot, int flags, int fildes, off_t off)
         }
 
         cdevp = map_obj->data;
-        if ((pa = cdevp->mmap(vp->dev, off, 0)) == 0) {
+        if ((pa = cdevp->mmap(vp->dev, len, off, 0)) == 0) {
             kprintf("mmap: dev mmap() gave 0\n");
             return NULL;
         }