[PATCH AUTOSEL 5.15 09/65] orangefs: Fix sb refcount leak when allocate sb info failed.

From: Sasha Levin
Date: Tue Nov 16 2021 - 14:06:23 EST

From: Chenyuan Mi <cymi20@xxxxxxxxxxxx>

[ Upstream commit ac2c63757f4f413980d6c676dbe1ae2941b94afa ]

The reference counting issue happens in one exception handling
path of orangefs_mount(). When failing to allocate sb info, the
function forgets to decrease the refcount of sb increased by
sget(), causing a refcount leak.

Fix this issue by jumping to the label "free_sb_and_op" instead
of "free_op"

Signed-off-by: Chenyuan Mi <cymi20@xxxxxxxxxxxx>
Signed-off-by: Xiyu Yang <xiyuyang19@xxxxxxxxxxxx>
Signed-off-by: Xin Tan <tanxin.ctf@xxxxxxxxx>
Signed-off-by: Mike Marshall <hubcap@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
fs/orangefs/super.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/orangefs/super.c b/fs/orangefs/super.c
index 2f2e430461b21..c46a9005fc445 100644
--- a/fs/orangefs/super.c
+++ b/fs/orangefs/super.c
@@ -526,7 +526,7 @@ struct dentry *orangefs_mount(struct file_system_type *fst,
sb->s_fs_info = kzalloc(sizeof(struct orangefs_sb_info_s), GFP_KERNEL);
if (!ORANGEFS_SB(sb)) {
- goto free_op;
+ goto free_sb_and_op;

ret = orangefs_fill_sb(sb,