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• W3112502950 abstract "Rich thread-level parallelism of GPU has motivated co-running GPU kernels on a single GPU. However, when GPU kernels co-run, it is possible that one kernel can leverage buffer overflow to attack another kernel running on the same GPU. There is very limited work aiming to detect buffer overflow for GPU. Existing work has either large performance overhead or limited capability in detecting buffer overflow. In this article, we introduce GMODx, a runtime software system that can detect GPU buffer overflow. GMODx performs always-on monitoring on allocated memory based on a canary-based design. First, for the fine-grained memory management, GMODx introduces a set of byte arrays to store buffer information for overflow detection. Techniques, such as lock-free accesses to the byte arrays, delayed memory free, efficient memory reallocation, and garbage collection for the byte arrays, are proposed to achieve high performance. Second, for the coarse-grained memory management, GMODx utilizes unified memory to delegate the always-on monitoring to the CPU. To reduce performance overhead, we propose several techniques, including customized list data structure and specific optimizations against the unified memory. For micro-benchmarking, our experiments show that GMODx is capable of detecting buffer overflow for the fine-grained memory management without performance loss, and that it incurs small runtime overhead (4.2 percent on average and up to 9.7 percent) for the coarse-grained memory management. For real workloads, we deploy GMODx on the TensorFlow framework, it only causes 0.8 percent overhead on average (up to 1.8 percent)." @default.
• W3112502950 created "2020-12-21" @default.
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• W3112502950 date "2021-05-01" @default.
• W3112502950 modified "2023-10-15" @default.
• W3112502950 title "Efficient Buffer Overflow Detection on GPU" @default.
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• W3112502950 doi "https://doi.org/10.1109/tpds.2020.3042965" @default.
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