The patch titled
Subject: mm/mmu_notifier: fix deadlock from typo vm_lock_anon_vma()
has been added to the -mm tree. Its filename is
lib-interval_tree-fast-overlap-detection-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/lib-interval_tree-fast-overlap-detection-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/lib-interval_tree-fast-overlap-detection-fix.patch
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------------------------------------------------------
From: Jérôme Glisse <jglisse@xxxxxxxxxx>
Subject: mm/mmu_notifier: fix deadlock from typo vm_lock_anon_vma()
Fix typo introduced by 0c67e6038580e343bd ("lib/interval_tree: fast
overlap detection") which result in deadlock when mm_take_all_locks() is
call (only user being mmu_notifier at this time).
Link: http://lkml.kernel.org/r/20170808225719.20723-1-jglisse@xxxxxxxxxx
Signed-off-by: Jérôme Glisse <jglisse@xxxxxxxxxx>
Cc: Davidlohr Bueso <dbueso@xxxxxxx>
Cc: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mmap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/mmap.c~lib-interval_tree-fast-overlap-detection-fix mm/mmap.c
--- a/mm/mmap.c~lib-interval_tree-fast-overlap-detection-fix
+++ a/mm/mmap.c
@@ -3322,7 +3322,7 @@ static DEFINE_MUTEX(mm_all_locks_mutex);
static void vm_lock_anon_vma(struct mm_struct *mm, struct anon_vma *anon_vma)
{
- if (!test_bit(0, (unsigned long *) &anon_vma->rb_root.rb_root.rb_node)) {
+ if (!test_bit(0, (unsigned long *) &anon_vma->root->rb_root.rb_root.rb_node)) {
/*
* The LSB of head.next can't change from under us
* because we hold the mm_all_locks_mutex.
_
Patches currently in -mm which might be from jglisse@xxxxxxxxxx are
lib-interval_tree-fast-overlap-detection-fix.patch
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