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由 Jan Schmidt 提交于
The tree mod log functions were accessing root->node->... directly, without use of btrfs_root_node() or explicit rcu locking. This could lead to an extent buffer reference being leaked and another reference being freed too early when preemtion was enabled. Signed-off-by: NJan Schmidt <list.btrfs@jan-o-sch.net> Signed-off-by: NJosef Bacik <jbacik@fusionio.com>
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