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Fix out-of-bound load in row scaling #3527

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Fix out-of-bound load in row scaling #3527

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4 changes: 3 additions & 1 deletion fbgemm_gpu/experimental/gemm/triton_gemm/fp8_gemm.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2232,7 +2232,9 @@ def _kernel_scale_fp8_row(

# Iterate over chunks of the row and apply scales.
for _k in range(0, tl.cdiv(N, BLOCK_SIZE)):
a = tl.load(A + pid * stride_am + n_offset * stride_an)
a = tl.load(
A + pid * stride_am + n_offset * stride_an, mask=n_offset < N, other=0.0
)
col_scale = tl.load(w_scale + n_offset)
scaled_a = a * row_scale * col_scale
tl.store(
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