Report an error if a deep pixel as more than UINT_MAX samples (#2256)

cary-ilm · peterhillman · commit 41b4c3e656bf · 2026-02-26T10:54:15.000+13:00
Signed-off-by: Peter Hillman &lt;peterh@wetafx.co.nz&gt;
diff --git a/src/lib/OpenEXR/ImfCompositeDeepScanLine.cpp b/src/lib/OpenEXR/ImfCompositeDeepScanLine.cpp
@@ -508,6 +508,10 @@ CompositeDeepScanLine::readPixels (int start, int end)
         num_sources[ptr] = 0;
         for (size_t j = 0; j < parts; j++)
         {
+            if (total_sizes[ptr] > std::numeric_limits<unsigned int>::max() - counts[j][ptr])
+                throw IEX_NAMESPACE::ArgExc (
+                    "Cannot composite scanline: pixel cannot have more than UINT_MAX samples");
+                
             total_sizes[ptr] += counts[j][ptr];
             if (counts[j][ptr] > 0) num_sources[ptr]++;
         }

Original file line number	Diff line number	Diff line change
`@@ -508,6 +508,10 @@ CompositeDeepScanLine::readPixels (int start, int end)`
`508`	`508`	`num_sources[ptr] = 0;`
`509`	`509`	`for (size_t j = 0; j < parts; j++)`
`510`	`510`	`{`
	`511`	`+ if (total_sizes[ptr] > std::numeric_limits<unsigned int>::max() - counts[j][ptr])`
	`512`	`+ throw IEX_NAMESPACE::ArgExc (`
	`513`	`+ "Cannot composite scanline: pixel cannot have more than UINT_MAX samples");`
	`514`	`+`
`511`	`515`	`total_sizes[ptr] += counts[j][ptr];`
`512`	`516`	`if (counts[j][ptr] > 0) num_sources[ptr]++;`
`513`	`517`	`}`