Index: lib/Object/WasmObjectFile.cpp
===================================================================
--- lib/Object/WasmObjectFile.cpp
+++ lib/Object/WasmObjectFile.cpp
@@ -178,6 +178,11 @@
   if (Ptr + Size > Eof)
     return make_error<StringError>("Section too large",
                                    object_error::parse_failed);
+  if (Section.Type == wasm::WASM_SEC_CUSTOM) {
+    const uint8_t *NameStart = Ptr;
+    Section.Name = readString(Ptr);
+    Size -= Ptr - NameStart;
+  }
   Section.Content = ArrayRef<uint8_t>(Ptr, Size);
   Ptr += Size;
   return Error::success();
@@ -618,7 +623,6 @@
 
 Error WasmObjectFile::parseCustomSection(WasmSection &Sec,
                                          const uint8_t *Ptr, const uint8_t *End) {
-  Sec.Name = readString(Ptr);
   if (Sec.Name == "name") {
     if (Error Err = parseNameSection(Ptr, End))
       return Err;
Index: test/MC/WebAssembly/custom-sections.ll
===================================================================
--- test/MC/WebAssembly/custom-sections.ll
+++ test/MC/WebAssembly/custom-sections.ll
@@ -11,13 +11,13 @@
 
 ; CHECK:  Section {
 ; CHECK:    Type: CUSTOM (0x0)
-; CHECK:    Size: 7
+; CHECK:    Size: 3
 ; CHECK:    Offset: 72
 ; CHECK:    Name: red
 ; CHECK:  }
 ; CHECK:  Section {
 ; CHECK:    Type: CUSTOM (0x0)
-; CHECK:    Size: 12
+; CHECK:    Size: 6
 ; CHECK:    Offset: 85
 ; CHECK:    Name: green
 ; CHECK:  }