c++
// Original Vulnerable Code:
// 9 	runLength = (*pbOrderHdr) & g_MaskRegularRunLength;
// 10 	if (runLength == 0)
// 12 		if (!buffer_within_range(pbOrderHdr, 1, pbEnd)) 

// Patch 1:  Advance Pointer Before Reading
// - Ensures data is read AFTER the bounds check
9   if (!buffer_within_range(pbOrderHdr + 1, 1, pbEnd)) { ... error handling ...}
10  runLength = (*pbOrderHdr) & g_MaskRegularRunLength; 
11  if (runLength == 0) { ... } 

// Patch 2:  Check Bounds Before Reading (Alternative)
9   if (pbOrderHdr + 1 >= pbEnd) { ... error handling ... }
10  runLength = (*pbOrderHdr) & g_MaskRegularRunLength;
11  if (runLength == 0) { ... } 

// Patch 3: Read Byte Conditionally
9   runLength = 0; // Initialize to a safe value
10  if (pbOrderHdr < pbEnd) {
11      runLength = (*pbOrderHdr) & g_MaskRegularRunLength;
12  } 
13  if (runLength == 0) { ... } 

// Patch 4: Use buffer_within_range for Single Byte Read
9   BYTE nextByte = 0; // Initialize to a safe value
10  if (buffer_within_range(pbOrderHdr, 1, pbEnd)) {
11      nextByte = *pbOrderHdr; 
12  }
13  runLength = nextByte & g_MaskRegularRunLength;
14  if (runLength == 0) { ... }

// Patch 5: Inline a Safe Single Byte Read
9   runLength = (pbOrderHdr < pbEnd) ? (*pbOrderHdr & g_MaskRegularRunLength) : 0;
10  if (runLength == 0) { ... } 
