Assert there are no holders of VMA lock for reading when it is about to be
destroyed.
Signed-off-by: Suren Baghdasaryan <surenb@xxxxxxxxxx>
---
kernel/fork.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/kernel/fork.c b/kernel/fork.c
index e1dd79c7738c..bdb55f25895d 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -491,6 +491,9 @@ static void vm_area_free_rcu_cb(struct rcu_head *head)
{
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
--
2.39.2.722.g9855ee24e9-goog
