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| author | Fangrui Song <i@maskray.me> | 2023-06-15 10:34:33 -0700 |
|---|---|---|
| committer | Fangrui Song <i@maskray.me> | 2023-06-15 10:34:33 -0700 |
| commit | daba24ee7bd3d80f085e2e5f057af6b873a78a24 (patch) | |
| tree | 4ec76389c88bcdf0d624a2ef874373540ff3f5fa /llvm/lib/Bitcode/Reader/MetadataLoader.cpp | |
| parent | faf7cd97d07c6c2242a96f5daf94fb05cda0c115 (diff) | |
| download | llvm-daba24ee7bd3d80f085e2e5f057af6b873a78a24.zip llvm-daba24ee7bd3d80f085e2e5f057af6b873a78a24.tar.gz llvm-daba24ee7bd3d80f085e2e5f057af6b873a78a24.tar.bz2 | |
[ELF] << >>: make RHS less than 64
The left/right shift linker script operators may trigger UB.
E.g. in linkerscript/end-overflow-check.test, the initial REGION1__PADDED_SR_SHIFT is
uint64_t(-3), cause the following expression to trigger an out-of-range shift in
a ubsan build of lld.
REGION1__PADDED_SR_SIZE = MAX(1 << REGION1__PADDED_SR_SHIFT, 32);
Protect such UBs by making RHS less than 64.
Diffstat (limited to 'llvm/lib/Bitcode/Reader/MetadataLoader.cpp')
0 files changed, 0 insertions, 0 deletions