[PATCH 3/5] mm/vmalloc: Initialize VA's list node after unlink

From: "Uladzislau Rezki (Sony)" <urezki@gmail.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm@kvack.org, LKML <linux-kernel@vger.kernel.org>,
	Christoph Hellwig <hch@infradead.org>,
	Matthew Wilcox <willy@infradead.org>,
	Nicholas Piggin <npiggin@gmail.com>,
	Uladzislau Rezki <urezki@gmail.com>,
	Oleksiy Avramchenko <oleksiy.avramchenko@sony.com>
Subject: [PATCH 3/5] mm/vmalloc: Initialize VA's list node after unlink
Date: Tue,  7 Jun 2022 11:34:47 +0200	[thread overview]
Message-ID: <20220607093449.3100-4-urezki@gmail.com> (raw)
In-Reply-To: <20220607093449.3100-1-urezki@gmail.com>

A vmap_area can travel between different places. For example
attached/detached to/from different rb-trees. In order to
prevent fancy bugs, initialize a VA's list node after it is
removed from the list, so it pairs with VA's rb_node which
is also initialized.

There is no functional change as a result of this patch.

Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
---
 mm/vmalloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 745e89eb6ca1..82771e555273 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -978,7 +978,7 @@ __unlink_va(struct vmap_area *va, struct rb_root *root, bool augment)
 	else
 		rb_erase(&va->rb_node, root);
 
-	list_del(&va->list);
+	list_del_init(&va->list);
 	RB_CLEAR_NODE(&va->rb_node);
 }
 
-- 
2.30.2


