[PATCH AUTOSEL 4.14 19/29] fuse: fix memleak in cuse_channel_open

[Sasha Levin]

From: zhengbin <zhengbi...@huawei.com>

[ Upstream commit 9ad09b1976c562061636ff1e01bfc3a57aebe56b ]

If cuse_send_init fails, need to fuse_conn_put cc->fc.

cuse_channel_open->fuse_conn_init->refcount_set(&fc->count, 1)
                 ->fuse_dev_alloc->fuse_conn_get
                 ->fuse_dev_free->fuse_conn_put

Fixes: cc080e9e9be1 ("fuse: introduce per-instance fuse_dev structure")
Reported-by: Hulk Robot <hul...@huawei.com>
Signed-off-by: zhengbin <zhengbi...@huawei.com>
Signed-off-by: Miklos Szeredi <mszer...@redhat.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 fs/fuse/cuse.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/fuse/cuse.c b/fs/fuse/cuse.c
index e9e97803442a6..55db06c7c587e 100644
--- a/fs/fuse/cuse.c
+++ b/fs/fuse/cuse.c
@@ -513,6 +513,7 @@ static int cuse_channel_open(struct inode *inode, struct 
file *file)
        rc = cuse_send_init(cc);
        if (rc) {
                fuse_dev_free(fud);
+               fuse_conn_put(&cc->fc);
                return rc;
        }
        file->private_data = fud;
-- 
2.20.1