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[WebAssembly] Fix overflow for input with missing version
Differential revision: https://reviews.llvm.org/D37070 llvm-svn: 311605
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@ -203,7 +203,16 @@ WasmObjectFile::WasmObjectFile(MemoryBufferRef Buffer, Error &Err)
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object_error::parse_failed);
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return;
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}
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const uint8_t *Eof = getPtr(getData().size());
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const uint8_t *Ptr = getPtr(4);
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if (Ptr + 4 > Eof) {
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Err = make_error<StringError>("Missing version number",
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object_error::parse_failed);
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return;
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}
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Header.Version = readUint32(Ptr);
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if (Header.Version != wasm::WasmVersion) {
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Err = make_error<StringError>("Bad version number",
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@ -211,7 +220,6 @@ WasmObjectFile::WasmObjectFile(MemoryBufferRef Buffer, Error &Err)
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return;
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}
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const uint8_t *Eof = getPtr(getData().size());
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WasmSection Sec;
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while (Ptr < Eof) {
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if ((Err = readSection(Sec, Ptr, getPtr(0))))
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BIN
test/Object/Inputs/WASM/missing-version.wasm
Normal file
BIN
test/Object/Inputs/WASM/missing-version.wasm
Normal file
Binary file not shown.
2
test/Object/wasm-missing-version.test
Normal file
2
test/Object/wasm-missing-version.test
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@ -0,0 +1,2 @@
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# RUN: not llvm-objdump -h %p/Inputs/WASM/missing-version.wasm 2>&1 | FileCheck %s
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# CHECK: {{.*}}: Missing version number
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