1 files changed, 24 insertions, 0 deletions
diff --git a/external/pdfium/ubsan.patch b/external/pdfium/ubsan.patch
new file mode 100644
index 000000000..bc9868244
--- /dev/null
+++ b/external/pdfium/ubsan.patch
@@ -0,0 +1,24 @@
+--- core/fxcrt/string_data_template.cpp
++++ core/fxcrt/string_data_template.cpp
+@@ -82,7 +82,8 @@ void StringDataTemplate<CharType>::CopyContentsAt(size_t offset,
+   DCHECK_GE(offset, 0);
+   DCHECK_GE(nLen, 0);
+   DCHECK_LE(offset + nLen, m_nAllocLength);
+-  memcpy(m_String + offset, pStr, nLen * sizeof(CharType));
++  if (nLen != 0)
++    memcpy(m_String + offset, pStr, nLen * sizeof(CharType));
+   m_String[offset + nLen] = 0;
+ }
+ 
+--- core/fxge/cfx_glyphcache.cpp
++++ core/fxge/cfx_glyphcache.cpp
+@@ -183,7 +183,8 @@ std::unique_ptr<CFX_GlyphBitmap> CFX_GlyphCache::RenderGlyph(
+       }
+     }
+   } else {
+-    memset(pDestBuf, 0, dest_pitch * bmheight);
++    if (dest_pitch != 0 && bmheight != 0)
++      memset(pDestBuf, 0, dest_pitch * bmheight);
+     int rowbytes = std::min(abs(src_pitch), dest_pitch);
+     for (int row = 0; row < bmheight; row++)
+       memcpy(pDestBuf + row * dest_pitch, pSrcBuf + row * src_pitch, rowbytes);