linux-kernel - Forwarded: [PATCH] mm/vmscan: test build to verify VM_WARN_ON

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Message-ID: <696c6976.a70a0220.34546f.0224.GAE@google.com>
Date: Sat, 17 Jan 2026 21:02:46 -0800
From: syzbot <syzbot+079a3b213add54dd18a7@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Forwarded: [PATCH] mm/vmscan: test build to verify VM_WARN_ON_ONCE fix

For archival purposes, forwarding an incoming command email to
linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com.

***

Subject: [PATCH] mm/vmscan: test build to verify VM_WARN_ON_ONCE fix
Author: kartikey406@...il.com

#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master

Test build to verify that VM_WARN_ON_ONCE in memcg1_swapout() no
longer triggers after Kairui Song's reordering patch.

This is a local test commit only and should NOT be submitted upstream.

Signed-off-by: Deepanshu Kartikey <kartikey406@...il.com>
---
 mm/vmscan.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index a0e3f51de749..ac8cffddc2ea 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -760,6 +760,7 @@ static int __remove_mapping(struct address_space *mapping, struct folio *folio,
 
 		if (reclaimed && !mapping_exiting(mapping))
 			shadow = workingset_eviction(folio, target_memcg);
+
 		memcg1_swapout(folio, swap);
 		__swap_cache_del_folio(ci, folio, swap, shadow);
 		swap_cluster_unlock_irq(ci);
-- 
2.43.0