The patch titled
Subject: mm/vmalloc: initialize VA's list node after unlink
has been added to the -mm mm-unstable branch. Its filename is
mm-vmalloc-initialize-vas-list-node-after-unlink.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-vmalloc-initialize-vas-list-node-after-unlink.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: "Uladzislau Rezki (Sony)" <urezki@xxxxxxxxx>
Subject: mm/vmalloc: initialize VA's list node after unlink
Date: Tue, 7 Jun 2022 11:34:47 +0200
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.
Link: https://lkml.kernel.org/r/20220607093449.3100-4-urezki@xxxxxxxxx
Signed-off-by: Uladzislau Rezki (Sony) <urezki@xxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Nicholas Piggin <npiggin@xxxxxxxxx>
Cc: Oleksiy Avramchenko <oleksiy.avramchenko@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmalloc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/vmalloc.c~mm-vmalloc-initialize-vas-list-node-after-unlink
+++ a/mm/vmalloc.c
@@ -977,7 +977,7 @@ __unlink_va(struct vmap_area *va, struct
else
rb_erase(&va->rb_node, root);
- list_del(&va->list);
+ list_del_init(&va->list);
RB_CLEAR_NODE(&va->rb_node);
}
_
Patches currently in -mm which might be from urezki@xxxxxxxxx are
mm-vmalloc-make-link_va-unlink_va-common-to-different-rb_root.patch
mm-vmalloc-extend-__alloc_vmap_area-with-extra-arguments.patch
mm-vmalloc-initialize-vas-list-node-after-unlink.patch
mm-vmalloc-extend-__find_vmap_area-with-one-more-argument.patch
lib-test_vmalloc-switch-to-prandom_u32.patch
