From: zhengbin <zhengbin13@huawei.com>
Date: Wed, 14 Aug 2019 15:59:09 +0800
Subject: fuse: fix memleak in cuse_channel_open
Git-commit: 9ad09b1976c562061636ff1e01bfc3a57aebe56b
Patch-mainline: v5.4-rc1
References: bsc#1174926

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 <hulkci@huawei.com>
Signed-off-by: zhengbin <zhengbin13@huawei.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Acked-by: Luis Henriques <lhenriques@suse.com>
---
 fs/fuse/cuse.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/fuse/cuse.c b/fs/fuse/cuse.c
index 45762bb7a934..00015d851382 100644
--- a/fs/fuse/cuse.c
+++ b/fs/fuse/cuse.c
@@ -521,6 +521,7 @@ 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;