The quilt patch titled
Subject: kernel/fork: assert no VMA readers during its destruction
has been removed from the -mm tree. Its filename was
kernel-fork-assert-no-vma-readers-during-its-destruction.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Suren Baghdasaryan <surenb@xxxxxxxxxx>
Subject: kernel/fork: assert no VMA readers during its destruction
Date: Mon, 27 Feb 2023 09:36:19 -0800
Assert there are no holders of VMA lock for reading when it is about to be
destroyed.
Link: https://lkml.kernel.org/r/20230227173632.3292573-21-surenb@xxxxxxxxxx
Signed-off-by: Suren Baghdasaryan <surenb@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/fork.c | 3 +++
1 file changed, 3 insertions(+)
--- a/kernel/fork.c~kernel-fork-assert-no-vma-readers-during-its-destruction
+++ a/kernel/fork.c
@@ -491,6 +491,9 @@ static void vm_area_free_rcu_cb(struct r
{
struct vm_area_struct *vma = container_of(head, struct vm_area_struct,
vm_rcu);
+
+ /* The vma should not be locked while being destroyed. */
+ VM_BUG_ON_VMA(rwsem_is_locked(&vma->lock), vma);
__vm_area_free(vma);
}
#endif
_
Patches currently in -mm which might be from surenb@xxxxxxxxxx are
