vbatts/llama.cpp
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CUDA: fix FA out-of-bounds writes (#7465)

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Johannes Gäßler 2024-05-22 17:58:25 +02:00 • committed by GitHub
parent b18532a4ef
commit 38c03478a3
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4 changed files with 18 additions and 2 deletions
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ggml-cuda/fattn-tile-f16.cu
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@ -238,6 +238,10 @@ static __global__ void flash_attn_tile_ext_f16(
for (int j_VKQ_0 = 0; j_VKQ_0 < ncols; j_VKQ_0 += nwarps) {
const int j_VKQ = j_VKQ_0 + threadIdx.y;
if (ic0 + j_VKQ >= ne01) {
return;
}
half kqsum_j = __low2half(kqsum[j_VKQ_0/nwarps]) + __high2half(kqsum[j_VKQ_0/nwarps]);
kqsum_j = warp_reduce_sum(kqsum_j);