Here are five possible patches for the CWE-190 vulnerability in the given code:

Patch 1: Add bounds checking before the calculation
```c
if (nXDst > (UINT32_MAX / dstBytesPerPixel) || nYDst > (UINT32_MAX / nDstStep))
    return FALSE;
const BYTE* pDstStart = &pDstData[nXDst * dstBytesPerPixel + nYDst * nDstStep];
```

Patch 2: Use safe integer multiplication function
```c
UINT64 offset;
if (!winpr_mul_u64_u32(&offset, nXDst, dstBytesPerPixel) || !winpr_add_u64_u32(&offset, offset, nYDst * nDstStep))
    return FALSE;
const BYTE* pDstStart = &pDstData[offset];
```

Patch 3: Use size_t for calculations and add overflow check
```c
size_t offset = (size_t)nXDst * dstBytesPerPixel;
if (offset / dstBytesPerPixel != nXDst) return FALSE;
offset += (size_t)nYDst * nDstStep;
if (offset < (size_t)nYDst * nDstStep) return FALSE;
const BYTE* pDstStart = &pDstData[offset];
```

Patch 4: Separate calculations and add checks
```c
UINT64 xOffset = (UINT64)nXDst * dstBytesPerPixel;
UINT64 yOffset = (UINT64)nYDst * nDstStep;
if (xOffset > UINT32_MAX || yOffset > UINT32_MAX || (xOffset + yOffset) > UINT32_MAX)
    return FALSE;
const BYTE* pDstStart = &pDstData[xOffset + yOffset];
```

Patch 5: Use a custom safe addition function
```c
UINT32 SafeAdd(UINT32 a, UINT32 b, BOOL* overflow) {
    UINT32 result = a + b;
    *overflow = result < a;
    return result;
}

UINT32 xOffset, yOffset, totalOffset;
BOOL overflow = FALSE;

xOffset = nXDst * dstBytesPerPixel;
yOffset = nYDst * nDstStep;
totalOffset = SafeAdd(xOffset, yOffset, &overflow);

if (overflow)
    return FALSE;

const BYTE* pDstStart = &pDstData[totalOffset];
```