linux-kernel - [PATCH] fuse: Put leaked request on error path of fuse

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Date:   Tue, 06 Nov 2018 12:13:14 +0300
From:   Kirill Tkhai <ktkhai@...tuozzo.com>
To:     miklos@...redi.hu, ktkhai@...tuozzo.com,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] fuse: Put leaked request on error path of fuse_retrieve()

fuse_request_send_notify_reply() may fail, and this case
it remains leaked (fuse_retrieve_end(), which is called
on error path, does not do that). Also, fc->num_waiting,
will never be decremented, and fuse_wait_aborted() will
never finish. So, put the request patently.

Signed-off-by: Kirill Tkhai <ktkhai@...tuozzo.com>
---
 fs/fuse/dev.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index ae813e609932..6fe330cc9709 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -1768,8 +1768,10 @@ static int fuse_retrieve(struct fuse_conn *fc, struct inode *inode,
 	req->in.args[1].size = total_len;
 
 	err = fuse_request_send_notify_reply(fc, req, outarg->notify_unique);
-	if (err)
+	if (err) {
 		fuse_retrieve_end(fc, req);
+		fuse_put_request(fc, req);
+	}
 
 	return err;
 }