[PATCH 3/3] mm: memfd_luo: restore and free memfd_luo_ser on failure

[Pratyush Yadav <pratyush@kernel.org>]

From: "Pratyush Yadav (Google)" <pratyush@kernel.org>

memfd_luo_ser has the serialization metadata. It is of no use once
restoration fails. Free it on failure.

Fixes: b3749f174d68 ("mm: memfd_luo: allow preserving memfd")
Signed-off-by: Pratyush Yadav (Google) <pratyush@kernel.org>
---
 mm/memfd_luo.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/mm/memfd_luo.c b/mm/memfd_luo.c
index 01a72e4d3ef6..a34fccc23b6a 100644
--- a/mm/memfd_luo.c
+++ b/mm/memfd_luo.c
@@ -447,7 +447,8 @@ static int memfd_luo_retrieve(struct liveupdate_file_op_args *args)
 	file = memfd_alloc_file("", 0);
 	if (IS_ERR(file)) {
 		pr_err("failed to setup file: %pe\n", file);
-		return PTR_ERR(file);
+		err = PTR_ERR(file);
+		goto free_ser;
 	}
 
 	vfs_setpos(file, ser->pos, MAX_LFS_FILESIZE);
@@ -473,7 +474,8 @@ static int memfd_luo_retrieve(struct liveupdate_file_op_args *args)
 
 put_file:
 	fput(file);
-
+free_ser:
+	kho_restore_free(ser);
 	return err;
 }
 
-- 
2.52.0.457.g6b5491de43-goog