The out of bounds maple tree issue was actually a maple tree error being treated as a node. This was caused by the requested allocation of more nodes than was available while forking, but there was no memory available. This series adds one node to the calculated mas_expected_entries() to ensure there is enough nodes, adds a flag to WARN_ON() if a request for nodes is hit with zero nodes available during a preallocated operation, and also adds the necessary check in the fork operation to fail. Liam R. Howlett (2): maple_tree: Fix mas_expected_entries() off by one kernel/fork: Detect mas_store() failure in dup_mmap() include/linux/maple_tree.h | 1 + kernel/fork.c | 5 +++++ lib/maple_tree.c | 26 +++++++++++++++++++++----- 3 files changed, 27 insertions(+), 5 deletions(-) -- 2.35.1
