1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/fork.c b/kernel/fork.c
index a6d243a50be3..ec913b13c5ed 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -617,6 +617,7 @@ static __latent_entropy int dup_mmap(struct mm_struct *mm,
 	if (retval)
 		goto out;
 
+	mt_clear_in_rcu(mas.tree);
 	mas_for_each(&old_mas, mpnt, ULONG_MAX) {
 		struct file *file;
 
@@ -703,6 +704,8 @@ static __latent_entropy int dup_mmap(struct mm_struct *mm,
 	retval = arch_dup_mmap(oldmm, mm);
 loop_out:
 	mas_destroy(&mas);
+	if (!retval)
+		mt_set_in_rcu(mas.tree);
 out:
 	mmap_write_unlock(mm);
 	flush_tlb_mm(oldmm);