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[BitcodeReader] Sanity check on Comdat ID

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Shouldn't be an assert, since user input can trigger it.

Bug found with AFL fuzz.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238261 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Filipe Cabecinhas
2015-05-26 23:00:56 +00:00
parent 116e31ffbe
commit 1c74d4768a
4 changed files with 14 additions and 2 deletions
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6
lib/Bitcode/Reader/BitcodeReader.cpp
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@ -2956,7 +2956,8 @@ std::error_code BitcodeReader::ParseModule(bool Resume,
if (Record.size() > 11) {
if (unsigned ComdatID = Record[11]) {
assert(ComdatID <= ComdatList.size());
if (ComdatID > ComdatList.size())
return Error("Invalid global variable comdat ID");
NewGV->setComdat(ComdatList[ComdatID - 1]);
}
} else if (hasImplicitComdat(RawLinkage)) {
@ -3020,7 +3021,8 @@ std::error_code BitcodeReader::ParseModule(bool Resume,
if (Record.size() > 12) {
if (unsigned ComdatID = Record[12]) {
assert(ComdatID <= ComdatList.size());
if (ComdatID > ComdatList.size())
return Error("Invalid function comdat ID");
Func->setComdat(ComdatList[ComdatID - 1]);
}
} else if (hasImplicitComdat(RawLinkage)) {