Messages in this thread Patch in this message | | | From | jglisse@redhat ... | Subject | [PATCH] mm/mmu_notifier: fix deadlock from typo vm_lock_anon_vma() | Date | Tue, 8 Aug 2017 18:57:19 -0400 |
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From: Jérôme Glisse <jglisse@redhat.com>
Fix typo introduced by 0c67e6038580e343bd5af12b7ac6548634f05f0d which result in dead lock when mm_take_all_locks() is call (only user being mmu_notifier at this time)
Signed-off-by: Jérôme Glisse <jglisse@redhat.com> Cc: Davidlohr Bueso <dbueso@suse.de> Cc: Andrew Morton <akpm@linux-foundation.org> --- mm/mmap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/mmap.c b/mm/mmap.c index 74abfd382478..2d906a8f67ac 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -3314,7 +3314,7 @@ 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. -- 2.13.4
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