From: Liam R. Howlett <Liam.Howlett@Oracle.com>
Date: Fri, 4 Sep 2020 15:27:31 +0000 (-0400)
Subject: mm and fork: Fix mtree_destroy path
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=f62a1bce9b4938dc5dd022fa9a3d9ea2aa34b83c;p=users%2Fjedix%2Flinux-maple.git

mm and fork: Fix mtree_destroy path

Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
---

diff --git a/kernel/fork.c b/kernel/fork.c
index 44a154f95746..2abc65388afa 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1079,6 +1079,7 @@ static inline void __mmput(struct mm_struct *mm)
 {
 	VM_BUG_ON(atomic_read(&mm->mm_users));
 
+	mt_clear_in_rcu(&mm->mm_mt);
 	uprobe_clear_state(mm);
 	exit_aio(mm);
 	ksm_exit(mm);
@@ -1093,7 +1094,6 @@ static inline void __mmput(struct mm_struct *mm)
 	}
 	if (mm->binfmt)
 		module_put(mm->binfmt->module);
-	mt_clear_in_rcu(&mm->mm_mt);
 	mmdrop(mm);
 }
 
diff --git a/mm/mmap.c b/mm/mmap.c
index c78317c8fdca..24537cc57c1f 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -3009,7 +3009,7 @@ void exit_mmap(struct mm_struct *mm)
 	}
 
 	trace_exit_mmap(mm);
-	mtree_direct_destroy(&mm->mm_mt);
+	mtree_destroy(&mm->mm_mt);
 	vm_unacct_memory(nr_accounted);
 }