[PATCH] fs/iomap: fix memory leak on error condition

[Garry McNulty]

If the call to is_sync_kiocb() fails an error is returned without
freeing dio. Set the return code and jump to out_free_dio.

Detected by CoverityScan, CID 1429424 ("Resource leak")

Signed-off-by: Garry McNulty <garrm...@gmail.com>
---
 fs/iomap.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/fs/iomap.c b/fs/iomap.c
index afd163586aa0..65c5db38c15a 100644
--- a/fs/iomap.c
+++ b/fs/iomap.c
@@ -1063,8 +1063,10 @@ iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
                iomap_dio_set_error(dio, ret);
 
        if (!atomic_dec_and_test(&dio->ref)) {
-               if (!is_sync_kiocb(iocb))
-                       return -EIOCBQUEUED;
+               if (!is_sync_kiocb(iocb)) {
+                       ret = -EIOCBQUEUED;
+                       goto out_free_dio;
+               }
 
                for (;;) {
                        set_current_state(TASK_UNINTERRUPTIBLE);
-- 
2.14.3