+ mm-page_owner-fix-memory-leak-in-page_owner_stack_fops-release.patch added to mm-hotfixes-unstable branch

+ mm-page_owner-fix-memory-leak-in-page_owner_stack_fops-release.patch added to mm-hotfixes-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm/page_owner: fix memory leak in page_owner_stack_fops->release()
has been added to the -mm mm-hotfixes-unstable branch.  Its filename is
     mm-page_owner-fix-memory-leak-in-page_owner_stack_fops-release.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-page_owner-fix-memory-leak-in-page_owner_stack_fops-release.patch

This patch will later appear in the mm-hotfixes-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Ran Xiaokai <ran.xiaokai@zte.com.cn>
Subject: mm/page_owner: fix memory leak in page_owner_stack_fops->release()
Date: Fri, 19 Dec 2025 07:42:32 +0000

The page_owner_stack_fops->open() callback invokes seq_open_private(),
therefore its corresponding ->release() callback must call
seq_release_private().  Otherwise it will cause a memory leak of struct
stack_print_ctx.

Link: https://lkml.kernel.org/r/20251219074232.136482-1-ranxiaokai627@163.com
Fixes: 765973a098037 ("mm,page_owner: display all stacks and their count")
Signed-off-by: Ran Xiaokai <ran.xiaokai@zte.com.cn>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Brendan Jackman <jackmanb@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Marco Elver <elver@google.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Zi Yan <ziy@nvidia.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/page_owner.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/page_owner.c~mm-page_owner-fix-memory-leak-in-page_owner_stack_fops-release
+++ a/mm/page_owner.c
@@ -952,7 +952,7 @@ static const struct file_operations page
 	.open		= page_owner_stack_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
-	.release	= seq_release,
+	.release	= seq_release_private,
 };
 
 static int page_owner_threshold_get(void *data, u64 *val)
_

Patches currently in -mm which might be from ran.xiaokai@zte.com.cn are

mm-page_owner-fix-memory-leak-in-page_owner_stack_fops-release.patch