From: Pratyush Yadav (Google) <pratyush@kernel.org>
Date: Thu, 22 Jan 2026 15:18:41 +0000 (+0100)
Subject: mm: memfd_luo: restore and free memfd_luo_ser on failure
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c657c5dc1360fa1ed1b090aedb5883d9cf9f0a0f;p=thirdparty%2Fkernel%2Fstable.git

mm: memfd_luo: restore and free memfd_luo_ser on failure

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

Link: https://lkml.kernel.org/r/20260122151842.4069702-4-pratyush@kernel.org
Fixes: b3749f174d68 ("mm: memfd_luo: allow preserving memfd")
Signed-off-by: Pratyush Yadav (Google) <pratyush@kernel.org>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

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;
 }