iov_iter: fix memory leak in pipe_get_pages_alloc()

Make n signed to avoid leaking the pages array if __pipe_get_pages()
fails to allocate any pages.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/lib/iov_iter.c b/lib/iov_iter.c
index 4d5bf40..fdae394 100644 (file)
--- a/lib/iov_iter.c
+++ b/lib/iov_iter.c
@@ -1102,7 +1102,7 @@ static ssize_t pipe_get_pages_alloc(struct iov_iter *i,
                   size_t *start)
 {
        struct page **p;
-       size_t n;
+       ssize_t n;
        int idx;
        int npages;