Merge pull request #15494 from Snuffleupagus/issue-15492

Tweak the heuristic that handles JPEG images with a wildly incorrect SOF (Start of Frame) `scanLines` parameter (issue 15492)

src/core/jpg.js

@@ -163,11 +163,11 @@ function decodeScan(
             // Heuristic to attempt to handle corrupt JPEG images with too
             // large `scanLines` parameter, by falling back to the currently
             // parsed number of scanLines when it's at least (approximately)
-            // one order of magnitude smaller than expected (fixes
-            // issue10880.pdf and issue10989.pdf).
+            // one "half" order of magnitude smaller than expected (fixes
+            // issue10880.pdf, issue10989.pdf, issue15492.pdf).
             if (
               maybeScanLines > 0 &&
-              Math.round(frame.scanLines / maybeScanLines) >= 10
+              Math.round(frame.scanLines / maybeScanLines) >= 5
             ) {
               throw new DNLMarkerError(
                 "Found EOI marker (0xFFD9) while parsing scan data, " +

test/pdfs/issue15492.pdf.link

@@ -0,0 +1 @@
+https://github.com/mozilla/pdf.js/files/9624549/EP_Kandzetovic.pdf

test/test_manifest.json

@@ -5166,6 +5166,14 @@
        "lastPage": 1,
        "type": "eq"
     },
+    {  "id": "issue15492",
+       "file": "pdfs/issue15492.pdf",
+       "md5": "968d36ef340852a4c0e6fa22ced96798",
+       "rounds": 1,
+       "link": true,
+       "lastPage": 1,
+       "type": "eq"
+    },
     {  "id": "issue9650",
        "file": "pdfs/issue9650.pdf",
        "md5": "20d50bda6b1080b6d9088811299c791e",