.

wcfs/internal/wcfs_virtmem.cpp

@@ -278,12 +278,14 @@ error _Mapping::_remmapblk(int64_t blk, Tid at) {
     // after file.size will raise SIGBUS. (assumes head/f size ↑=)
     if ((blk+1)*f->blksize > st.st_size) {
         err = mmap_zero_into_ro(blkmem, 1*f->blksize);
-        // XXX err handle
+        if (err != nil)
+            return err;
     }
     // block is inside file - mmap file data
     else {
         err = mm::map_into(blkmem, 1*f->blksize, PROT_READ, MAP_SHARED, fsfile, blk*f->blksize);
-        // XXX err handle
+        if (err != nil)
+            return err;
     }
 
     return nil;