Error when building Linux with latest LLVM (and CLang)

[alex-s168]

When trying to build linux zen (6.5/main) with LLVM (commit 05738a3), I get this error:

PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.	Program arguments: ld.lld -m elf_x86_64 -mllvm -import-instr-limit=5 -z noexecstack -r -o vmlinux.o -T .tmp_initcalls.lds --whole-archive vmlinux.a --no-whole-archive --start-group --end-group
1.	Running pass 'Function Pass Manager' on module 'ld-temp.o'.
2.	Running pass 'X86 DAG->DAG Instruction Selection' on function '@ip6_rcv_core'
 #0 0x000055698fdff53e llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/usr/local/bin/lld+0x382253e)
 #1 0x000055698fdfc9db SignalHandler(int) Signals.cpp:0:0
 #2 0x00007faca405c710 (/usr/lib/libc.so.6+0x3e710)
 #3 0x00007faca40bb575 __libc_realloc (/usr/lib/libc.so.6+0x9d575)
 #4 0x000055698fd69dc4 llvm::SmallVectorBase<unsigned int>::grow_pod(void*, unsigned long, unsigned long) (/usr/local/bin/lld+0x378cdc4)
 #5 0x00005569925c73b4 llvm::SUnit::addPred(llvm::SDep const&, bool) (/usr/local/bin/lld+0x5fea3b4)
 #6 0x0000556991fb830a llvm::ScheduleDAGSDNodes::AddSchedEdges() (/usr/local/bin/lld+0x59db30a)
 #7 0x0000556991fb09d2 (anonymous namespace)::ScheduleDAGRRList::Schedule() ScheduleDAGRRList.cpp:0:0
 #8 0x0000556991f9bf2e llvm::SelectionDAGISel::CodeGenAndEmitDAG() (/usr/local/bin/lld+0x59bef2e)
 #9 0x0000556991f9e86f llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/usr/local/bin/lld+0x59c186f)
#10 0x0000556991fa0e0a llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (.part.0) SelectionDAGISel.cpp:0:0
#11 0x0000556991ac6d40 (anonymous namespace)::X86DAGToDAGISel::runOnMachineFunction(llvm::MachineFunction&) X86ISelDAGToDAG.cpp:0:0
#12 0x00005569923b93c8 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (.part.0) MachineFunctionPass.cpp:0:0
#13 0x0000556993dfc271 llvm::FPPassManager::runOnFunction(llvm::Function&) (/usr/local/bin/lld+0x781f271)
#14 0x0000556993dfc5bc llvm::FPPassManager::runOnModule(llvm::Module&) (/usr/local/bin/lld+0x781f5bc)
#15 0x0000556993dfcfbe llvm::legacy::PassManagerImpl::run(llvm::Module&) (/usr/local/bin/lld+0x781ffbe)
#16 0x000055699211bcac codegen(llvm::lto::Config const&, llvm::TargetMachine*, std::function<llvm::Expected<std::unique_ptr<llvm::CachedFileStream, std::default_delete<llvm::CachedFileStream>>> (unsigned int, llvm::Twine const&)>, unsigned int, llvm::Module&, llvm::ModuleSummaryIndex const&) LTOBackend.cpp:0:0
#17 0x000055699211c3df llvm::lto::backend(llvm::lto::Config const&, std::function<llvm::Expected<std::unique_ptr<llvm::CachedFileStream, std::default_delete<llvm::CachedFileStream>>> (unsigned int, llvm::Twine const&)>, unsigned int, llvm::Module&, llvm::ModuleSummaryIndex&) (/usr/local/bin/lld+0x5b3f3df)
#18 0x000055699210edf2 llvm::lto::LTO::runRegularLTO(std::function<llvm::Expected<std::unique_ptr<llvm::CachedFileStream, std::default_delete<llvm::CachedFileStream>>> (unsigned int, llvm::Twine const&)>) (/usr/local/bin/lld+0x5b31df2)
#19 0x000055699210f35b llvm::lto::LTO::run(std::function<llvm::Expected<std::unique_ptr<llvm::CachedFileStream, std::default_delete<llvm::CachedFileStream>>> (unsigned int, llvm::Twine const&)>, std::function<llvm::Expected<std::function<llvm::Expected<std::unique_ptr<llvm::CachedFileStream, std::default_delete<llvm::CachedFileStream>>> (unsigned int, llvm::Twine const&)>> (unsigned int, llvm::StringRef, llvm::Twine const&)>) (/usr/local/bin/lld+0x5b3235b)
#20 0x000055699002d915 lld::elf::BitcodeCompiler::compile() (/usr/local/bin/lld+0x3a50915)
#21 0x000055698ff4e6ff void lld::elf::LinkerDriver::compileBitcodeFiles<llvm::object::ELFType<(llvm::endianness)1, true>>(bool) (/usr/local/bin/lld+0x39716ff)
#22 0x000055698ff5bed1 lld::elf::LinkerDriver::link(llvm::opt::InputArgList&) (/usr/local/bin/lld+0x397eed1)
#23 0x000055698ff5dfaf lld::elf::LinkerDriver::linkerMain(llvm::ArrayRef<char const*>) (/usr/local/bin/lld+0x3980faf)
#24 0x000055698ff5f77b lld::elf::link(llvm::ArrayRef<char const*>, llvm::raw_ostream&, llvm::raw_ostream&, bool, bool) (/usr/local/bin/lld+0x398277b)
#25 0x000055698fe011cc lld::unsafeLldMain(llvm::ArrayRef<char const*>, llvm::raw_ostream&, llvm::raw_ostream&, llvm::ArrayRef<lld::DriverDef>, bool) (/usr/local/bin/lld+0x38241cc)
#26 0x000055698fd408b6 lld_main(int, char**, llvm::ToolContext const&) (/usr/local/bin/lld+0x37638b6)
#27 0x000055698fd40b1f main (/usr/local/bin/lld+0x3763b1f)
#28 0x00007faca4045cd0 (/usr/lib/libc.so.6+0x27cd0)
#29 0x00007faca4045d8a __libc_start_main (/usr/lib/libc.so.6+0x27d8a)
#30 0x000055698fd400a5 _start (/usr/local/bin/lld+0x37630a5)

I think I should probably not use the latest LLVM but the CI for that commit said that all tests were completed successfully.

[llvmbot]

@llvm/issue-subscribers-backend-x86

Author: alex_s168 (SuperCraftAlex)

When trying to build linux with LLVM (commit 05738a3), I get this error: ``` PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace. Stack dump: 0. Program arguments: ld.lld -m elf_x86_64 -mllvm -import-instr-limit=5 -z noexecstack -r -o vmlinux.o -T .tmp_initcalls.lds --whole-archive vmlinux.a --no-whole-archive --start-group --end-group 1. Running pass 'Function Pass Manager' on module 'ld-temp.o'. 2. Running pass 'X86 DAG->DAG Instruction Selection' on function '@ip6_rcv_core' #0 0x000055698fdff53e llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/usr/local/bin/lld+0x382253e) #1 0x000055698fdfc9db SignalHandler(int) Signals.cpp:0:0 #2 0x00007faca405c710 (/usr/lib/libc.so.6+0x3e710) #3 0x00007faca40bb575 __libc_realloc (/usr/lib/libc.so.6+0x9d575) #4 0x000055698fd69dc4 llvm::SmallVectorBase<unsigned int>::grow_pod(void*, unsigned long, unsigned long) (/usr/local/bin/lld+0x378cdc4) #5 0x00005569925c73b4 llvm::SUnit::addPred(llvm::SDep const&, bool) (/usr/local/bin/lld+0x5fea3b4) #6 0x0000556991fb830a llvm::ScheduleDAGSDNodes::AddSchedEdges() (/usr/local/bin/lld+0x59db30a) #7 0x0000556991fb09d2 (anonymous namespace)::ScheduleDAGRRList::Schedule() ScheduleDAGRRList.cpp:0:0 #8 0x0000556991f9bf2e llvm::SelectionDAGISel::CodeGenAndEmitDAG() (/usr/local/bin/lld+0x59bef2e) #9 0x0000556991f9e86f llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/usr/local/bin/lld+0x59c186f) #10 0x0000556991fa0e0a llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (.part.0) SelectionDAGISel.cpp:0:0 #11 0x0000556991ac6d40 (anonymous namespace)::X86DAGToDAGISel::runOnMachineFunction(llvm::MachineFunction&) X86ISelDAGToDAG.cpp:0:0 #12 0x00005569923b93c8 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (.part.0) MachineFunctionPass.cpp:0:0 #13 0x0000556993dfc271 llvm::FPPassManager::runOnFunction(llvm::Function&) (/usr/local/bin/lld+0x781f271) #14 0x0000556993dfc5bc llvm::FPPassManager::runOnModule(llvm::Module&) (/usr/local/bin/lld+0x781f5bc) #15 0x0000556993dfcfbe llvm::legacy::PassManagerImpl::run(llvm::Module&) (/usr/local/bin/lld+0x781ffbe) #16 0x000055699211bcac codegen(llvm::lto::Config const&, llvm::TargetMachine*, std::function<llvm::Expected<std::unique_ptr<llvm::CachedFileStream, std::default_delete<llvm::CachedFileStream>>> (unsigned int, llvm::Twine const&)>, unsigned int, llvm::Module&, llvm::ModuleSummaryIndex const&) LTOBackend.cpp:0:0 #17 0x000055699211c3df llvm::lto::backend(llvm::lto::Config const&, std::function<llvm::Expected<std::unique_ptr<llvm::CachedFileStream, std::default_delete<llvm::CachedFileStream>>> (unsigned int, llvm::Twine const&)>, unsigned int, llvm::Module&, llvm::ModuleSummaryIndex&) (/usr/local/bin/lld+0x5b3f3df) #18 0x000055699210edf2 llvm::lto::LTO::runRegularLTO(std::function<llvm::Expected<std::unique_ptr<llvm::CachedFileStream, std::default_delete<llvm::CachedFileStream>>> (unsigned int, llvm::Twine const&)>) (/usr/local/bin/lld+0x5b31df2) #19 0x000055699210f35b llvm::lto::LTO::run(std::function<llvm::Expected<std::unique_ptr<llvm::CachedFileStream, std::default_delete<llvm::CachedFileStream>>> (unsigned int, llvm::Twine const&)>, std::function<llvm::Expected<std::function<llvm::Expected<std::unique_ptr<llvm::CachedFileStream, std::default_delete<llvm::CachedFileStream>>> (unsigned int, llvm::Twine const&)>> (unsigned int, llvm::StringRef, llvm::Twine const&)>) (/usr/local/bin/lld+0x5b3235b) #20 0x000055699002d915 lld::elf::BitcodeCompiler::compile() (/usr/local/bin/lld+0x3a50915) #21 0x000055698ff4e6ff void lld::elf::LinkerDriver::compileBitcodeFiles<llvm::object::ELFType<(llvm::endianness)1, true>>(bool) (/usr/local/bin/lld+0x39716ff) #22 0x000055698ff5bed1 lld::elf::LinkerDriver::link(llvm::opt::InputArgList&) (/usr/local/bin/lld+0x397eed1) #23 0x000055698ff5dfaf lld::elf::LinkerDriver::linkerMain(llvm::ArrayRef<char const*>) (/usr/local/bin/lld+0x3980faf) #24 0x000055698ff5f77b lld::elf::link(llvm::ArrayRef<char const*>, llvm::raw_ostream&, llvm::raw_ostream&, bool, bool) (/usr/local/bin/lld+0x398277b) #25 0x000055698fe011cc lld::unsafeLldMain(llvm::ArrayRef<char const*>, llvm::raw_ostream&, llvm::raw_ostream&, llvm::ArrayRef<lld::DriverDef>, bool) (/usr/local/bin/lld+0x38241cc) #26 0x000055698fd408b6 lld_main(int, char**, llvm::ToolContext const&) (/usr/local/bin/lld+0x37638b6) #27 0x000055698fd40b1f main (/usr/local/bin/lld+0x3763b1f) #28 0x00007faca4045cd0 (/usr/lib/libc.so.6+0x27cd0) #29 0x00007faca4045d8a __libc_start_main (/usr/lib/libc.so.6+0x27d8a) #30 0x000055698fd400a5 _start (/usr/local/bin/lld+0x37630a5) ``` I think I should probably not use the latest LLVM but the CI for that commit said that all tests were completed successfully.

[nathanchance]

When trying to build linux zen (6.5/main) with LLVM (commit 05738a3), I get this error:

Can you post your .config file and Linux kernel build command? I cannot reproduce this with Arch Linux's configuration + CONFIG_LTO_CLANG_FULL=y with Zen's source @ zen-kernel/zen-kernel@7c9dcf6 and LLVM @ 05738a3.

$ git show -s --format='%h ("%s")'
7c9dcf6494cf ("Merge v6.5.11 into 6.5/main")

$ clang --version | head -1
clang version 18.0.0 (https://github.com/llvm/llvm-project 05738a38820ffbe5b95e747db0e19b1104fc29f8)

$ curl -LSso .config https://gitlab.archlinux.org/archlinux/packaging/packages/linux-zen/-/raw/main/config

$ scripts/config -d LTO_NONE -e LTO_CLANG_FULL

$ make -skj"$(nproc)" ARCH=x86_64 LLVM=1 olddefconfig vmlinux

$ rg CONFIG_LTO .config
881:CONFIG_LTO=y
882:CONFIG_LTO_CLANG=y
886:# CONFIG_LTO_NONE is not set
887:CONFIG_LTO_CLANG_FULL=y
888:# CONFIG_LTO_CLANG_THIN is not set

[vtta]

Another failed attempt here with clang 17.0.5 and linux v6.6 and LTO off:

+ /usr/bin/time --verbose make WERROR=0 LLVM=-17 CFLAGS=-w HOSTCC=clang HOSTCXX=clang++ CC=clang AS=llvm-as LD=ld.lld AR=llvm-ar NM=llvm-nm STRIP=llvm-strip OBJCOPY=llvm-objcopy OBJDUMP=llvm-objdump READELF=llvm-readelf CONFIG_RUST=y MRPROPER=no CLEAN=no
 -C /data/projects/kernel/vtta O=/data/projects/kernel/build/vtta -j 1 bzImage modules compile_commands.json rust-analyzer
make: Entering directory '/data/projects/kernel/vtta'
make[1]: Entering directory '/data/projects/kernel/build/vtta'
  GEN     Makefile
  CALL    /data/projects/kernel/vtta/scripts/checksyscalls.sh
  DESCEND objtool
make[5]: 'install_headers' is up to date.
  DESCEND bpf/resolve_btfids
make[5]: 'install_headers' is up to date.
  CC      arch/x86/kvm/../../../virt/kvm/async_pf.o
  CC      arch/x86/kvm/../../../virt/kvm/pfncache.o
  CC      arch/x86/kvm/x86.o
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.      Program arguments: clang -Wp,-MMD,arch/x86/kvm/.x86.o.d -nostdinc -I/data/projects/kernel/vtta/arch/x86/include -I./arch/x86/include/generated -I/data/projects/kernel/vtta/include -I./include -I/data/projects/kernel/vtta/arch/x86/include/uapi -I.
/arch/x86/include/generated/uapi -I/data/projects/kernel/vtta/include/uapi -I./include/generated/uapi -include /data/projects/kernel/vtta/include/linux/compiler-version.h -include /data/projects/kernel/vtta/include/linux/kconfig.h -include /data/projects
/kernel/vtta/include/linux/compiler_types.h -D__KERNEL__ --target=x86_64-linux-gnu -fintegrated-as -Werror=unknown-warning-option -Werror=ignored-optimization-argument -Werror=option-ignored -Werror=unused-command-line-argument -fmacro-prefix-map=/data/p
rojects/kernel/vtta/= -std=gnu11 -fshort-wchar -funsigned-char -fno-common -fno-PIE -fno-strict-aliasing -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -fcf-protection=branch -fno-jump-tables -m64 -falign-loops=1 -mno-80387 -mno-fp-ret-in-387 -mstack-al
ignment=8 -mskip-rax-setup -march=core2 -mno-red-zone -mcmodel=kernel -Wno-sign-compare -fno-asynchronous-unwind-tables -fno-delete-null-pointer-checks -O2 -fstack-protector -fno-stack-clash-protection -fzero-call-used-regs=used-gpr -pg -mfentry -DCC_USI
NG_NOP_MCOUNT -DCC_USING_FENTRY -falign-functions=64 -fstrict-flex-arrays=3 -fno-strict-overflow -fno-stack-check -Wall -Wundef -Werror=implicit-function-declaration -Werror=implicit-int -Werror=return-type -Werror=strict-prototypes -Wno-format-security 
-Wno-trigraphs -Wno-frame-address -Wno-address-of-packed-member -Wframe-larger-than=1024 -Wno-gnu -Wno-unused-but-set-variable -Wno-unused-const-variable -Wvla -Wno-pointer-sign -Wcast-function-type -Wimplicit-fallthrough -Werror=date-time -Werror=incomp
atible-pointer-types -Wenum-conversion -Wno-unused-but-set-variable -Wno-unused-const-variable -Wno-pointer-to-enum-cast -Wno-tautological-constant-out-of-range-compare -Wno-unaligned-access -Wno-cast-function-type-strict -Wno-missing-field-initializers 
-Wno-type-limits -Wno-shift-negative-value -Wno-initializer-overrides -Wno-sign-compare -g -gdwarf-5 -I /data/projects/kernel/vtta/arch/x86/kvm -Werror -I /data/projects/kernel/vtta/arch/x86/kvm -I ./arch/x86/kvm -DKBUILD_MODFILE=\"arch/x86/kvm/kvm\" -DK
BUILD_BASENAME=\"x86\" -DKBUILD_MODNAME=\"kvm\" -D__KBUILD_MODNAME=kmod_kvm -c -o arch/x86/kvm/x86.o /data/projects/kernel/vtta/arch/x86/kvm/x86.c
1.      <eof> parser at end of file
2.      Code generation
3.      Running pass 'Function Pass Manager' on module '/data/projects/kernel/vtta/arch/x86/kvm/x86.c'.
4.      Running pass 'Prologue/Epilogue Insertion & Frame Finalization' on function '@kvm_check_nested_events'
 #0 0x00007f08ad44d6d8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /builddir/build/BUILD/llvm-project-17.0.5.src/llvm/lib/Support/Unix/Signals.inc:602:13
 #1 0x00007f08ad44ba70 llvm::sys::RunSignalHandlers() /builddir/build/BUILD/llvm-project-17.0.5.src/llvm/lib/Support/Signals.cpp:105:18
 #2 0x00007f08ad3a6c79 (anonymous namespace)::CrashRecoveryContextImpl::HandleCrash(int, unsigned long) /builddir/build/BUILD/llvm-project-17.0.5.src/llvm/lib/Support/CrashRecoveryContext.cpp:73:5
 #3 0x00007f08ad3a6c79 CrashRecoverySignalHandler(int) /builddir/build/BUILD/llvm-project-17.0.5.src/llvm/lib/Support/CrashRecoveryContext.cpp:390:51
 #4 0x00007f08ac58e720 __restore_rt libc_sigaction.c:0:0
 #5 0x00007f08ad8f1f11 llvm::BitVector::reset(unsigned int) /builddir/build/BUILD/llvm-project-17.0.5.src/llvm/include/llvm/ADT/BitVector.h:398:30
 #6 0x00007f08ad8f1f11 (anonymous namespace)::PEI::insertZeroCallUsedRegs(llvm::MachineFunction&) /builddir/build/BUILD/llvm-project-17.0.5.src/llvm/lib/CodeGen/PrologEpilogInserter.cpp:1291:22
 #7 0x00007f08ad8f1f11 (anonymous namespace)::PEI::insertPrologEpilogCode(llvm::MachineFunction&) /builddir/build/BUILD/llvm-project-17.0.5.src/llvm/lib/CodeGen/PrologEpilogInserter.cpp:1169:3
 #8 0x00007f08ad8f1f11 (anonymous namespace)::PEI::runOnMachineFunction(llvm::MachineFunction&) /builddir/build/BUILD/llvm-project-17.0.5.src/llvm/lib/CodeGen/PrologEpilogInserter.cpp:263:5
 #9 0x00007f08ad7e409f llvm::MachineFunctionPass::runOnFunction(llvm::Function&) /builddir/build/BUILD/llvm-project-17.0.5.src/llvm/lib/CodeGen/MachineFunctionPass.cpp:0:13
#10 0x00007f08ad581016 llvm::FPPassManager::runOnFunction(llvm::Function&) /builddir/build/BUILD/llvm-project-17.0.5.src/llvm/lib/IR/LegacyPassManager.cpp:1435:27
#11 0x00007f08ad586a83 llvm::FPPassManager::runOnModule(llvm::Module&) /builddir/build/BUILD/llvm-project-17.0.5.src/llvm/lib/IR/LegacyPassManager.cpp:1481:13
#12 0x00007f08ad5816b1 (anonymous namespace)::MPPassManager::runOnModule(llvm::Module&) /builddir/build/BUILD/llvm-project-17.0.5.src/llvm/lib/IR/LegacyPassManager.cpp:0:27
#13 0x00007f08ad5816b1 llvm::legacy::PassManagerImpl::run(llvm::Module&) /builddir/build/BUILD/llvm-project-17.0.5.src/llvm/lib/IR/LegacyPassManager.cpp:535:44
#14 0x00007f08b53ccac4 llvm::TimeTraceScope::~TimeTraceScope() /builddir/build/BUILD/llvm-project-17.0.5.src/llvm/include/llvm/Support/TimeProfiler.h:155:9
#15 0x00007f08b53ccac4 (anonymous namespace)::EmitAssemblyHelper::RunCodegenPipeline(clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream>>&, std::unique_ptr<llvm::ToolOutputFile, std::default_delete<
llvm::ToolOutputFile>>&) /builddir/build/BUILD/llvm-project-17.0.5.src/clang/lib/CodeGen/BackendUtil.cpp:1116:3
#16 0x00007f08b53ccac4 (anonymous namespace)::EmitAssemblyHelper::EmitAssembly(clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream>>) /builddir/build/BUILD/llvm-project-17.0.5.src/clang/lib/CodeGen/B
ackendUtil.cpp:1137:3
#17 0x00007f08b53ccac4 clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::HeaderSearchOptions const&, clang::CodeGenOptions const&, clang::TargetOptions const&, clang::LangOptions const&, llvm::StringRef, llvm::Module*, clang::BackendAction, llvm
::IntrusiveRefCntPtr<llvm::vfs::FileSystem>, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream>>) /builddir/build/BUILD/llvm-project-17.0.5.src/clang/lib/CodeGen/BackendUtil.cpp:1299:13
#18 0x00007f08b5733b4d std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream>>::~unique_ptr() /usr/lib64/gcc/x86_64-generic-linux/13/../../../../include/c++/13/bits/unique_ptr.h:403:6
#19 0x00007f08b5733b4d clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) /builddir/build/BUILD/llvm-project-17.0.5.src/clang/lib/CodeGen/CodeGenAction.cpp:386:7
#20 0x00007f08b44b2a56 __gnu_cxx::__normal_iterator<std::unique_ptr<clang::TemplateInstantiationCallback, std::default_delete<clang::TemplateInstantiationCallback>>*, std::vector<std::unique_ptr<clang::TemplateInstantiationCallback, std::default_delete<c
lang::TemplateInstantiationCallback>>, std::allocator<std::unique_ptr<clang::TemplateInstantiationCallback, std::default_delete<clang::TemplateInstantiationCallback>>>>>::__normal_iterator(std::unique_ptr<clang::TemplateInstantiationCallback, std::defaul
t_delete<clang::TemplateInstantiationCallback>>* const&) /usr/lib64/gcc/x86_64-generic-linux/13/../../../../include/c++/13/bits/stl_iterator.h:1077:20
#21 0x00007f08b44b2a56 std::vector<std::unique_ptr<clang::TemplateInstantiationCallback, std::default_delete<clang::TemplateInstantiationCallback>>, std::allocator<std::unique_ptr<clang::TemplateInstantiationCallback, std::default_delete<clang::TemplateI
nstantiationCallback>>>>::begin() /usr/lib64/gcc/x86_64-generic-linux/13/../../../../include/c++/13/bits/stl_vector.h:871:16
#22 0x00007f08b44b2a56 void clang::finalize<std::vector<std::unique_ptr<clang::TemplateInstantiationCallback, std::default_delete<clang::TemplateInstantiationCallback>>, std::allocator<std::unique_ptr<clang::TemplateInstantiationCallback, std::default_de
lete<clang::TemplateInstantiationCallback>>>>>(std::vector<std::unique_ptr<clang::TemplateInstantiationCallback, std::default_delete<clang::TemplateInstantiationCallback>>, std::allocator<std::unique_ptr<clang::TemplateInstantiationCallback, std::default
_delete<clang::TemplateInstantiationCallback>>>>&, clang::Sema const&) /builddir/build/BUILD/llvm-project-17.0.5.src/clang/include/clang/Sema/TemplateInstCallback.h:54:16
#23 0x00007f08b44b2a56 clang::ParseAST(clang::Sema&, bool, bool) /builddir/build/BUILD/llvm-project-17.0.5.src/clang/lib/Parse/ParseAST.cpp:183:3
#24 0x00007f08b60b1a87 clang::FrontendAction::Execute() /builddir/build/BUILD/llvm-project-17.0.5.src/clang/lib/Frontend/FrontendAction.cpp:1063:10
#25 0x00007f08b602bff4 llvm::Error::getPtr() const /builddir/build/BUILD/llvm-project-17.0.5.src/llvm/include/llvm/Support/Error.h:273:12
#26 0x00007f08b602bff4 llvm::Error::operator bool() /builddir/build/BUILD/llvm-project-17.0.5.src/llvm/include/llvm/Support/Error.h:233:16
#27 0x00007f08b602bff4 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /builddir/build/BUILD/llvm-project-17.0.5.src/clang/lib/Frontend/CompilerInstance.cpp:1053:23
#28 0x00007f08b6124344 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /builddir/build/BUILD/llvm-project-17.0.5.src/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:272:25
#29 0x00005649cc27fc89 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /builddir/build/BUILD/llvm-project-17.0.5.src/clang/tools/driver/cc1_main.cpp:249:15
#30 0x00005649cc27d7c3 ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) /builddir/build/BUILD/llvm-project-17.0.5.src/clang/tools/driver/driver.cpp:366:12
#31 0x00007f08b5d08239 clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const::$_0::operator()() const /builddir/build/BUILD/llvm-pr
oject-17.0.5.src/clang/lib/Driver/Job.cpp:440:30
#32 0x00007f08b5d08239 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const::$_0>(lo
ng) /builddir/build/BUILD/llvm-project-17.0.5.src/llvm/include/llvm/ADT/STLFunctionalExtras.h:45:12
#33 0x00007f08ad3a6a5c llvm::function_ref<void ()>::operator()() const /builddir/build/BUILD/llvm-project-17.0.5.src/llvm/include/llvm/ADT/STLFunctionalExtras.h:0:12
#34 0x00007f08ad3a6a5c llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) /builddir/build/BUILD/llvm-project-17.0.5.src/llvm/lib/Support/CrashRecoveryContext.cpp:426:3
#35 0x00007f08b5d07ade clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const /builddir/build/BUILD/llvm-project-17.0.5.src/clang/li
b/Driver/Job.cpp:440:7
#36 0x00007f08b5cd225e clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const /builddir/build/BUILD/llvm-project-17.0.5.src/clang/lib/Driver/Compilation.cpp:199:15
#37 0x00007f08b5cd249e clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const /builddir/build/BUILD/llvm-project-17.0.5.src/clang/lib/Driver/Compilation.cp
p:253:13
#38 0x00007f08b5ced10e llvm::SmallVectorBase<unsigned int>::empty() const /builddir/build/BUILD/llvm-project-17.0.5.src/llvm/include/llvm/ADT/SmallVector.h:94:46
#39 0x00007f08b5ced10e clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) /builddir/build/BUILD/llvm-project-17.0.5.src/clang/lib/Driver/Driver.cpp:1906:23
#40 0x00005649cc27d136 clang_main(int, char**, llvm::ToolContext const&) /builddir/build/BUILD/llvm-project-17.0.5.src/clang/tools/driver/driver.cpp:542:21
#41 0x00005649cc2898c1 main /builddir/build/BUILD/llvm-project-17.0.5.src/llvm/clr-build/tools/clang/tools/driver/clang-driver.cpp:15:3
#42 0x00007f08ac574d77 __libc_start_call_main /builddir/build/BUILD/glibc-2.38/csu/../sysdeps/nptl/libc_start_call_main.h:74:3
#43 0x00007f08ac574e35 call_init /builddir/build/BUILD/glibc-2.38/csu/../csu/libc-start.c:128:20
#44 0x00007f08ac574e35 __libc_start_main@GLIBC_2.2.5 /builddir/build/BUILD/glibc-2.38/csu/../csu/libc-start.c:347:5
#45 0x00005649cc27a1c1 _start /builddir/build/BUILD/glibc-2.38/csu/../sysdeps/x86_64/start.S:117:0
clang: error: clang frontend command failed with exit code 139 (use -v to see invocation)
clang version 17.0.5
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
clang: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg: /tmp/x86-f3aa9f.c
clang: note: diagnostic msg: /tmp/x86-f3aa9f.sh
clang: note: diagnostic msg: 

********************
make[5]: *** [/data/projects/kernel/vtta/scripts/Makefile.build:243: arch/x86/kvm/x86.o] Error 1
make[4]: *** [/data/projects/kernel/vtta/scripts/Makefile.build:480: arch/x86/kvm] Error 2
make[3]: *** [/data/projects/kernel/vtta/scripts/Makefile.build:480: arch/x86] Error 2
make[2]: *** [/data/projects/kernel/vtta/Makefile:1913: .] Error 2
make[1]: *** [/data/projects/kernel/vtta/Makefile:234: __sub-make] Error 2
make[1]: Leaving directory '/data/projects/kernel/build/vtta'
make: *** [Makefile:234: __sub-make] Error 2
make: Leaving directory '/data/projects/kernel/vtta'
Command exited with non-zero status 2
        Command being timed: "make WERROR=0 LLVM=-17 CFLAGS=-w HOSTCC=clang HOSTCXX=clang++ CC=clang AS=llvm-as LD=ld.lld AR=llvm-ar NM=llvm-nm STRIP=llvm-strip OBJCOPY=llvm-objcopy OBJDUMP=llvm-objdump READELF=llvm-readelf CONFIG_RUST=y MRPROPER=no CLEA
N=no -C /data/projects/kernel/vtta O=/data/projects/kernel/build/vtta -j 1 bzImage modules compile_commands.json rust-analyzer"
        User time (seconds): 9.24
        System time (seconds): 3.52
        Percent of CPU this job got: 96%
        Elapsed (wall clock) time (h:mm:ss or m:ss): 0:13.20
        Average shared text size (kbytes): 0
        Average unshared data size (kbytes): 0
        Average stack size (kbytes): 0
        Average total size (kbytes): 0
        Maximum resident set size (kbytes): 604544
        Average resident set size (kbytes): 0
        Major (requiring I/O) page faults: 4301
        Minor (reclaiming a frame) page faults: 470178
        Voluntary context switches: 5872
        Involuntary context switches: 163
        Swaps: 0
        File system inputs: 0
        File system outputs: 2568
        Socket messages sent: 0
        Socket messages received: 0
        Signals delivered: 0
        Page size (bytes): 4096
        Exit status: 2

$ rg CONFIG_LTO .config
799:CONFIG_LTO_NONE=y
800:# CONFIG_LTO_CLANG_FULL is not set
801:# CONFIG_LTO_CLANG_THIN is not set

.config
x86-f3aa9f.tgz

[nathanchance]

@vtta I am not sure your crash is the same issue as the one initially reported here, as it is reproducible on release/17.x but not main, which doesn't line up with the OP. I bisected the fix for your crash to f800c1f but unfortunately, as far as I am aware, there are no further planned updates to release/17.x, so there isn't much to do about it. You can disable CONFIG_ZERO_CALL_USED_REGS to avoid it if you are not able to patch your LLVM with that fix.

[vtta]

@vtta I am not sure your crash is the same issue as the one initially reported here, as it is reproducible on release/17.x but not main, which doesn't line up with the OP. I bisected the fix for your crash to f800c1f but unfortunately, as far as I am aware, there are no further planned updates to release/17.x, so there isn't much to do about it. You can disable CONFIG_ZERO_CALL_USED_REGS to avoid it if you are not able to patch your LLVM with that fix.

Thanks for the fix, I can compile with CONFIG_ZERO_CALL_USED_REGS disabled. The llvm I am using is from clearlinux, I have created an issue on their site.

[KyunLFA]

Hey,

I think I narrowed down the issue that is affecting the kernel compile here.
The problem is when LLVM Clang tries to compile C files under net/ipv6 with the Zen(1-4) scheduler model. Given linux-next 1st of Dec 2023, LLVM commit b6d0ee05, and error

PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: clang -Wp,-MMD,net/ipv6/.ip6_input.o.d -nostdinc -I./arch/x86/include -I./arch/x86/include/generated -I./include -I./arch/x86/include/uapi -I./arch/x86/include/generated/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/compiler-version.h -include ./include/linux/kconfig.h -include ./include/linux/compiler_types.h -D__KERNEL__ --target=x86_64-linux-gnu -fintegrated-as -Werror=unknown-warning-option -Werror=ignored-optimization-argument -Werror=option-ignored -Werror=unused-command-line-argument -fmacro-prefix-map=./= -std=gnu11 -fshort-wchar -funsigned-char -fno-common -fno-PIE -fno-strict-aliasing -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -fcf-protection=branch -fno-jump-tables -m64 -falign-loops=1 -mno-80387 -mno-fp-ret-in-387 -mstack-alignment=8 -mskip-rax-setup -march=znver4 -mno-red-zone -mcmodel=kernel -Wno-sign-compare -fno-asynchronous-unwind-tables -fno-delete-null-pointer-checks -O3 -mllvm -polly -fno-semantic-interposition -pipe -fstack-protector-strong -fomit-frame-pointer -ftrivial-auto-var-init=zero -fno-stack-clash-protection -fsanitize=kcfi -falign-functions=16 -fstrict-flex-arrays=3 -fno-strict-overflow -fno-stack-check -Wall -Wundef -Werror=implicit-function-declaration -Werror=implicit-int -Werror=return-type -Werror=strict-prototypes -Wno-format-security -Wno-trigraphs -Wno-frame-address -Wno-address-of-packed-member -Wmissing-declarations -Wmissing-prototypes -Wno-gnu -Wno-unused-but-set-variable -Wno-unused-const-variable -Wvla -Wno-pointer-sign -Wcast-function-type -Wimplicit-fallthrough -Werror=date-time -Werror=incompatible-pointer-types -Wenum-conversion -Wno-unused-but-set-variable -Wno-unused-const-variable -Wno-format-overflow -Wno-format-truncation -Wno-pointer-to-enum-cast -Wno-tautological-constant-out-of-range-compare -Wno-unaligned-access -Wno-cast-function-type-strict -Wno-missing-field-initializers -Wno-type-limits -Wno-shift-negative-value -Wno-initializer-overrides -Wno-sign-compare -DRANDSTRUCT -frandomize-layout-seed-file=./scripts/basic/randstruct.seed -DKBUILD_MODFILE=\"net/ipv6/ipv6\" -DKBUILD_BASENAME=\"ip6_input\" -DKBUILD_MODNAME=\"ipv6\" -D__KBUILD_MODNAME=kmod_ipv6 -c -o net/ipv6/ip6_input.o net/ipv6/ip6_input.c
1.	<eof> parser at end of file
2.	Code generation
3.	Running pass 'Function Pass Manager' on module 'net/ipv6/ip6_input.c'.
4.	Running pass 'X86 DAG->DAG Instruction Selection' on function '@ip6_rcv_core'
 #0 0x00007ff03dcbdf3d llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/usr/bin/../lib/libLLVM-18.so+0x26bdf3d)
 #1 0x00007ff03dcbbb64 llvm::sys::RunSignalHandlers() (/usr/bin/../lib/libLLVM-18.so+0x26bbb64)
 #2 0x00007ff03dbfb0b6 (/usr/bin/../lib/libLLVM-18.so+0x25fb0b6)
 #3 0x00007ff03b2437c0 (/usr/bin/../lib/libc.so.6+0x437c0)
 #4 0x00007ff03e3ca82e llvm::SUnit::setHeightDirty() (/usr/bin/../lib/libLLVM-18.so+0x2dca82e)
 #5 0x00007ff03e3ca5b3 llvm::SUnit::addPred(llvm::SDep const&, bool) (/usr/bin/../lib/libLLVM-18.so+0x2dca5b3)
 #6 0x00007ff03e6987cb llvm::ScheduleDAGSDNodes::AddSchedEdges() (/usr/bin/../lib/libLLVM-18.so+0x30987cb)
 #7 0x00007ff03e68bcf9 (/usr/bin/../lib/libLLVM-18.so+0x308bcf9)
 #8 0x00007ff03e74aa52 llvm::SelectionDAGISel::CodeGenAndEmitDAG() (/usr/bin/../lib/libLLVM-18.so+0x314aa52)
 #9 0x00007ff03e749dd7 llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/usr/bin/../lib/libLLVM-18.so+0x3149dd7)
#10 0x00007ff03e747ba9 llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (/usr/bin/../lib/libLLVM-18.so+0x3147ba9)
#11 0x00007ff03ff39ee6 (/usr/bin/../lib/libLLVM-18.so+0x4939ee6)
#12 0x00007ff03e1905b6 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (/usr/bin/../lib/libLLVM-18.so+0x2b905b6)
#13 0x00007ff03de535e3 llvm::FPPassManager::runOnFunction(llvm::Function&) (/usr/bin/../lib/libLLVM-18.so+0x28535e3)
#14 0x00007ff03de5a923 llvm::FPPassManager::runOnModule(llvm::Module&) (/usr/bin/../lib/libLLVM-18.so+0x285a923)
#15 0x00007ff03de5436e llvm::legacy::PassManagerImpl::run(llvm::Module&) (/usr/bin/../lib/libLLVM-18.so+0x285436e)
#16 0x00007ff04356abb8 clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::HeaderSearchOptions const&, clang::CodeGenOptions const&, clang::TargetOptions const&, clang::LangOptions const&, llvm::StringRef, llvm::Module*, clang::BackendAction, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>, std::__1::unique_ptr<llvm::raw_pwrite_stream, std::__1::default_delete<llvm::raw_pwrite_stream>>, clang::BackendConsumer*) (/usr/bin/../lib/libclang-cpp.so.18+0x276abb8)
#17 0x00007ff043920020 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/usr/bin/../lib/libclang-cpp.so.18+0x2b20020)
#18 0x00007ff0423da746 clang::ParseAST(clang::Sema&, bool, bool) (/usr/bin/../lib/libclang-cpp.so.18+0x15da746)
#19 0x00007ff044456ccd clang::FrontendAction::Execute() (/usr/bin/../lib/libclang-cpp.so.18+0x3656ccd)
#20 0x00007ff0443c1303 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/usr/bin/../lib/libclang-cpp.so.18+0x35c1303)
#21 0x00007ff0444cec03 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/usr/bin/../lib/libclang-cpp.so.18+0x36cec03)
#22 0x000056258e910d00 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/usr/bin/clang-18+0x11d00)
#23 0x000056258e90e69b (/usr/bin/clang-18+0xf69b)
#24 0x00007ff04400abdd (/usr/bin/../lib/libclang-cpp.so.18+0x320abdd)
#25 0x00007ff03dbfae83 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/usr/bin/../lib/libLLVM-18.so+0x25fae83)
#26 0x00007ff04400a404 clang::driver::CC1Command::Execute(llvm::ArrayRef<std::__1::optional<llvm::StringRef>>, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>*, bool*) const (/usr/bin/../lib/libclang-cpp.so.18+0x320a404)
#27 0x00007ff043fc9fe9 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/usr/bin/../lib/libclang-cpp.so.18+0x31c9fe9)
#28 0x00007ff043fca23e clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::__1::pair<int, clang::driver::Command const*>>&, bool) const (/usr/bin/../lib/libclang-cpp.so.18+0x31ca23e)
#29 0x00007ff043feaf00 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::__1::pair<int, clang::driver::Command const*>>&) (/usr/bin/../lib/libclang-cpp.so.18+0x31eaf00)
#30 0x000056258e90daa0 clang_main(int, char**, llvm::ToolContext const&) (/usr/bin/clang-18+0xeaa0)
#31 0x000056258e91cb06 main (/usr/bin/clang-18+0x1db06)
#32 0x00007ff03b227f50 (/usr/bin/../lib/libc.so.6+0x27f50)
#33 0x00007ff03b22800a __libc_start_main (/usr/bin/../lib/libc.so.6+0x2800a)
#34 0x000056258e90a7a5 _start (/usr/bin/clang-18+0xb7a5)
clang: error: clang frontend command failed with exit code 139 (use -v to see invocation)
clang version 18.0.0 (/home/smol/.cache/paru/clone/llvm-git/llvm-project b6d0ee056d247e1ecfd4ecd3f97fb2d31740d79b)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /sbin
clang: note: diagnostic msg:
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg: /tmp/ip6_input-bf5cb7.c
clang: note: diagnostic msg: /tmp/ip6_input-bf5cb7.sh
clang: note: diagnostic msg:

********************

, deleting all compiler arguments except -march=znver4 yields the same error. Deleting it solves the error. Replacing -march= with any non-AMD CPU including x86 feature levels fixes the problem. Using x86-64-v4 and manually adding gfni and shstk instructions (which are AFAI-could-find the remaining instructions in znver4 not in x86-64-v4) also passes. Merely disabling CONFIG_ZERO_CALL_USED_REGS does not fix. But choosing znver1-4 triggers the error.

Anyone want to try to reproduce and investigate further?

[RKSimon]

I'm not familiar enough with linux kernel builds to reproduce this, but if its happening with any znver* model suggests it could be something to do with the PostRAScheduler which AMD models enable by default.

[nathanchance]

I can reproduce this now, I'll try to have a trivial reproducer later today.