linux-kernel - [PATCH] ovl: inode reference leak in "ovl_is

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Date:   Mon, 15 Jun 2020 08:56:45 -0700
From:   youngjun <her0gyugyu@...il.com>
To:     Miklos Szeredi <miklos@...redi.hu>
Cc:     linux-unionfs@...r.kernel.org, linux-kernel@...r.kernel.org,
        youngjun <her0gyugyu@...il.com>
Subject: [PATCH] ovl: inode reference leak in "ovl_is_inuse" true case.

When "ovl_is_inuse" true case, trap inode reference not put.

Signed-off-by: youngjun <her0gyugyu@...il.com>
---
 fs/overlayfs/super.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index 91476bc422f9..8837fc1ec3be 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -1499,8 +1499,10 @@ static int ovl_get_layers(struct super_block *sb, struct ovl_fs *ofs,
 
 		if (ovl_is_inuse(stack[i].dentry)) {
 			err = ovl_report_in_use(ofs, "lowerdir");
-			if (err)
+			if (err) {
+				iput(trap);
 				goto out;
+			}
 		}
 
 		mnt = clone_private_mount(&stack[i]);
-- 
2.17.1