fs: afs: Fix a possible null-pointer dereference in afs_put_read()

[linux.git] / fs / afs / file.c

diff --git a/fs/afs/file.c b/fs/afs/file.c
index 56b69576274d5b64cae3be2192f01838f201507d..dd3c55c9101c4e8475eca6a66e789a5f991d845d 100644 (file)
--- a/fs/afs/file.c
+++ b/fs/afs/file.c
@@ -191,11 +191,13 @@ void afs_put_read(struct afs_read *req)
        int i;
 
        if (refcount_dec_and_test(&req->usage)) {
-               for (i = 0; i < req->nr_pages; i++)
-                       if (req->pages[i])
-                               put_page(req->pages[i]);
-               if (req->pages != req->array)
-                       kfree(req->pages);
+               if (req->pages) {
+                       for (i = 0; i < req->nr_pages; i++)
+                               if (req->pages[i])
+                                       put_page(req->pages[i]);
+                       if (req->pages != req->array)
+                               kfree(req->pages);
+               }
                kfree(req);
        }
 }