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| author | Dmitry Vassiliev <dvassiliev@accesssoftek.com> | 2022-03-11 13:16:58 +0400 |
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| committer | Dmitry Vassiliev <dvassiliev@accesssoftek.com> | 2022-03-11 13:16:58 +0400 |
| commit | dfeb9781557ca655bb99a31f4bcf4d0187d7dd38 (patch) | |
| tree | bd3c34dca1011c86fee51a58888c9e8bfef3cad7 /llvm/lib/Support/MemoryBuffer.cpp | |
| parent | 374bb6dd8090ffaca5aad86b2d1cd9acad401f3a (diff) | |
| download | llvm-dfeb9781557ca655bb99a31f4bcf4d0187d7dd38.zip llvm-dfeb9781557ca655bb99a31f4bcf4d0187d7dd38.tar.gz llvm-dfeb9781557ca655bb99a31f4bcf4d0187d7dd38.tar.bz2 | |
Fixed a roll-over on size_t in getNewUninitMemBuffer()
Reviewed By: serge-sans-paille
Differential Revision: https://reviews.llvm.org/D121399
Diffstat (limited to 'llvm/lib/Support/MemoryBuffer.cpp')
| -rw-r--r-- | llvm/lib/Support/MemoryBuffer.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/Support/MemoryBuffer.cpp b/llvm/lib/Support/MemoryBuffer.cpp index 5003822..872b874 100644 --- a/llvm/lib/Support/MemoryBuffer.cpp +++ b/llvm/lib/Support/MemoryBuffer.cpp @@ -286,6 +286,8 @@ WritableMemoryBuffer::getNewUninitMemBuffer(size_t Size, const Twine &BufferName StringRef NameRef = BufferName.toStringRef(NameBuf); size_t AlignedStringLen = alignTo(sizeof(MemBuffer) + NameRef.size() + 1, 16); size_t RealLen = AlignedStringLen + Size + 1; + if (RealLen <= Size) // Check for rollover. + return nullptr; char *Mem = static_cast<char*>(operator new(RealLen, std::nothrow)); if (!Mem) return nullptr; |