Check for buffer overflow in prim_ops::et_copy_index()

[pytorchbot]

Stack from ghstack (oldest at bottom):

• -> Check for buffer overflow in prim_ops::et_copy_index() #12697

^
Test on top of D78676341.

Differential Revision: D78701418

[pytorch-bot]

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❌ 2 New Failures, 2 Cancelled Jobs

As of commit 0a130f3 with merge base de24489 ():

NEW FAILURES - The following jobs have failed:

• pull / test-eval_llama-mmlu-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 8fd956345d4ff74e2df3b11e3a67e4b1ec8d4f47e58e0f1c4a0936d846bd174b /exec failed with exit code 1
• pull / test-llava-runner-linux / linux-job (gh)
  RuntimeError: Command docker exec -t ec6b194a91a9f03ded911d6b58a7f5ed3e271f652f53116eaf0b0dd09d6fd9c7 /exec failed with exit code 139

CANCELLED JOBS - The following jobs were cancelled. Please retry:

• pull / test-models-linux (mobilebert, portable, linux.2xlarge) / linux-job (gh)
  ##[error]The operation was canceled.
• pull / test-models-linux (mobilebert, xnnpack-quantization-delegation, linux.2xlarge) / linux-job (gh)
  ##[error]The operation was canceled.

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