From: Jens Axboe <axboe@kernel.dk>
Date: Mon, 1 Mar 2021 16:09:56 +0000 (-0700)
Subject: io-wq: fix error path leak of buffered write hash map
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=dc7bbc9ef361bea331bf5258a35abcdef619d44d;p=linux.git

io-wq: fix error path leak of buffered write hash map

The 'err' path should include the hash put, we already grabbed a reference
once we get that far.

Fixes: e941894eae31 ("io-wq: make buffered file write hashed work map per-ctx")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/fs/io-wq.c b/fs/io-wq.c
index 946826beefe6c..dc430381b6941 100644
--- a/fs/io-wq.c
+++ b/fs/io-wq.c
@@ -1047,8 +1047,8 @@ struct io_wq *io_wq_create(unsigned bounded, struct io_wq_data *data)
 	if (!ret)
 		return wq;
 
-	io_wq_put_hash(data->hash);
 err:
+	io_wq_put_hash(data->hash);
 	cpuhp_state_remove_instance_nocalls(io_wq_online, &wq->cpuhp_node);
 	for_each_node(node)
 		kfree(wq->wqes[node]);