### What this PR does / why we need it? The triton operator does not perform boundary checks on the global position within the loop, leading to the memory overflow in scenarios with multiple concurrency + 1-step MTP launch. Solution: Add a check that global_pos < vec_len, and strictly limit the boundaries of all memory accesses to avoid out-of-bounds writes. backport:#7459 Signed-off-by: Bowen-Leee <caoshankuangren@gmail.com>