https://llvm.org/bugs/show_bug.cgi?id=24644
Bug ID: 24644
Summary: Method Verifier::visitAliaseeSubExpr stack overflows
Product: new-bugs
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: new bugs
Assignee: unassignedb...@nondot.org
Reporter: kschi...@google.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
Created attachment 14800
--> https://llvm.org/bugs/attachment.cgi?id=14800&action=edit
Assembly file
See attached for test case (bug1.ll).
This bug was found using afl-fuzz.
To see error: build llvm-as using the following steps:
% cmake -GNinja -DLLVM_USE_SANITIZER=Address -DLLVM_USE_SANITIZE_COVERAGE=YES
-DCMAKE_BUILD_TYPE=Release /path/to/llvm
% ninja bin/llvm-as
Then run:
bin/llvm-as bug1.ll -o /dev/null
The output is:
ASAN:DEADLYSIGNAL
=================================================================
==24746==ERROR: AddressSanitizer: stack-overflow on address 0x7ffef9709fa0 (pc
0x000000b0c4e5 bp 0x7ffef970a090 sp 0x7ffef9709fa0 T0)
#0 0xb0c4e4 in (anonymous
namespace)::Verifier::VerifyConstantExprBitcastType(llvm::ConstantExpr const*)
/workspace/llvm-dev/llvm/lib/IR/Verifier.cpp:1500
#1 0xb48d23 in (anonymous
namespace)::Verifier::visitAliaseeSubExpr(llvm::SmallPtrSetImpl<llvm::GlobalAlias
const*>&, llvm::GlobalAlias const&, llvm::Constant const&)
/workspace/llvm-dev/llvm/lib/IR/Verifier.cpp:584:5
#2 0xb491df in (anonymous
namespace)::Verifier::visitAliaseeSubExpr(llvm::SmallPtrSetImpl<llvm::GlobalAlias
const*>&, llvm::GlobalAlias const&, llvm::Constant const&)
/workspace/llvm-dev/llvm/lib/IR/Verifier.cpp:591:7
...
#249 0xb491df in (anonymous
namespace)::Verifier::visitAliaseeSubExpr(llvm::SmallPtrSetImpl<llvm::GlobalAlias
const*>&, llvm::GlobalAlias const&, llvm::Constant const&)
/workspace/llvm-dev/llvm/lib/IR/Verifier.cpp:591:7
#250 0xb491df in (anonymous
namespace)::Verifier::visitAliaseeSubExpr(llvm::SmallPtrSetImpl<llvm::GlobalAlias
const*>&, llvm::GlobalAlias const&, llvm::Constant const&)
/workspace/llvm-dev/llvm/lib/IR/Verifier.cpp:591:7
#251 0xb491df in (anonymous
namespace)::Verifier::visitAliaseeSubExpr(llvm::SmallPtrSetImpl<llvm::GlobalAlias
const*>&, llvm::GlobalAlias const&, llvm::Constant const&)
/workspace/llvm-dev/llvm/lib/IR/Verifier.cpp:591:7
SUMMARY: AddressSanitizer: stack-overflow
/workspace/llvm-dev/llvm/lib/IR/Verifier.cpp:1500 in (anonymous
namespace)::Verifier::VerifyConstantExprBitcastType(llvm::ConstantExpr const*)
==24746==ABORTING
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