[PATCH AUTOSEL 4.19 27/43] fuse: fix memleak in cuse_channel_open

Sasha Levin
2019-10-01T16:51:44Z

From: zhengbin <zhengbin13@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 <hulkci@huawei.com>
Signed-off-by: zhengbin <zhengbin13@huawei.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Sasha Levin <sashal@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 8f68181256c00..f057c213c453a 100644
--- a/fs/fuse/cuse.c
+++ b/fs/fuse/cuse.c
@@ -518,6 +518,7 @@ 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