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c2aca7d8e6
* Fix local memory out of bounds in atomic_fence
In the error condition, the atomic_fence kernel can illegally access local memory addresses.
In this snippet, localValues is in the local address space and provided as a kernel argument. Its size is effectively get_local_size(0) * sizeof(int). The stores to localValues lead to OoB accesses.
size_t myId = get_local_id(0);
...
if(hisAtomicValue != hisValue)
{ // fail
atomic_store(&destMemory[myId], myValue-1);
hisId = (hisId+get_local_size(0)-1)%get_local_size(0);
if(myValue+1 < 1)
localValues[myId*1+myValue+1] = hisId;
if(myValue+2 < 1)
localValues[myId*1+myValue+2] = hisAtomicValue;
if(myValue+3 < 1)
localValues[myId*1+myValue+3] = hisValue;
}
* Fix formatting
* Fix formatting again
* Formatting