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

cary-ilm · peterhillman · commit e69bf4b929b9 · 2026-02-26T14:22:47.000+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
@@ -519,6 +519,10 @@ 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
`@@ -519,6 +519,10 @@ CompositeDeepScanLine::readPixels (int start, int end)`
`519`	`519`	`num_sources[ptr] = 0;`
`520`	`520`	`for (size_t j = 0; j < parts; j++)`
`521`	`521`	`{`
	`522`	`+ if (total_sizes[ptr] > std::numeric_limits<unsigned int>::max() - counts[j][ptr])`
	`523`	`+ throw IEX_NAMESPACE::ArgExc (`
	`524`	`+ "Cannot composite scanline: pixel cannot have more than UINT_MAX samples");`
	`525`	`+`
`522`	`526`	`total_sizes[ptr] += counts[j][ptr];`
`523`	`527`	`if (counts[j][ptr] > 0) num_sources[ptr]++;`
`524`	`528`	`}`