/bin/bash: line 1: 3134535 Segmentation fault clang -Wp,-MMD,drivers/iio/humidity/.hdc3020.o.d -nostdinc -Iarch/mips/include -I./arch/mips/include/generated -Iinclude -I./include -Iarch/mips/include/uapi -I./arch/mips/include/generated/uapi -Iinclude...

kernel test robot <[email protected]> Sat, 18 Jul 2026 04:04:02 +0800
Newsgroups	dev.linux.lists.oe-kbuild
Message-ID	<[email protected]>
:::::: 
:::::: Manual check reason: "clang compiler bug"
:::::: 

BCC: [email protected]
CC: [email protected]
CC: [email protected]
TO: Dimitri Fedrau <[email protected]>
CC: Jonathan Cameron <[email protected]>
CC: Javier Carrasco <[email protected]>

Hi Dimitri,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   af5e34a41cd607c00ef752e00331736570992354
commit: cb372b4f46d4285e5d2c07ba734374151b8e34e7 iio: humditiy: hdc3020: fix units for thresholds and hysteresis
date:   9 months ago
:::::: branch date: 3 hours ago
:::::: commit date: 9 months ago
config: mips-randconfig-r113-20260717 (https://download.01.org/0day-ci/archive/20260718/[email protected]/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project 5c0dfced1adc55429e32b1db08570abd3a219d85)
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260718/[email protected]/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Fixes: cb372b4f46d4 ("iio: humditiy: hdc3020: fix units for thresholds and hysteresis")
| Reported-by: kernel test robot <[email protected]>
| Closes: https://lore.kernel.org/r/[email protected]/

Note: functions only called from assembly code should be annotated with the asmlinkage attribute
All errors (new ones prefixed by >>):

   warning: MIPS-I support is experimental
   PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace and dumped files.
   Stack dump:
   0.	Program arguments: clang -Wp,-MMD,drivers/iio/humidity/.hdc3020.o.d -nostdinc -Iarch/mips/include -I./arch/mips/include/generated -Iinclude -I./include -Iarch/mips/include/uapi -I./arch/mips/include/generated/uapi -Iinclude/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=mipsel-linux-gnu -fintegrated-as -Werror=unknown-warning-option -Werror=ignored-optimization-argument -Werror=option-ignored -Werror=unused-command-line-argument -DVMLINUX_LOAD_ADDRESS=0xffffffff84000000 -DLINKER_LOAD_ADDRESS=0x84000000 -DDATAOFFSET=0 -fmacro-prefix-map== -Wundef -DKBUILD_EXTRA_WARN1 -std=gnu11 -fshort-wchar -funsigned-char -fno-common -fno-PIE -fno-strict-aliasing -mno-check-zero-division -mabi=32 -G 0 -mno-abicalls -fno-pic -pipe -msoft-float -Wa,-msoft-float -ffreestanding -EL -fno-stack-check -march=mips1 -DTOOLCHAIN_SUPPORTS_VIRT -Iarch/mips/include/asm/mach-dec -Iarch/mips/include/asm/mach-generic -fno-asynchronous-unwind-tables -fno-delete-null-pointer-checks -O2 -fno-stack-protector -fomit-frame-pointer -ftrivial-auto-var-init=zero -fstrict-flex-arrays=3 -fno-strict-overflow -fno-stack-check -fno-builtin-wcslen -Wall -Wextra -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-format-overflow-non-kprintf -Wno-format-truncation-non-kprintf -Wno-default-const-init-unsafe -Wno-pointer-sign -Wcast-function-type -Wno-unterminated-string-initialization -Wimplicit-fallthrough -Werror=date-time -Werror=incompatible-pointer-types -Wenum-conversion -Wunused -Wmissing-format-attribute -Wmissing-include-dirs -Wunused-const-variable -Wno-missing-field-initializers -Wno-type-limits -Wno-shift-negative-value -Wno-enum-enum-conversion -Wno-sign-compare -Wno-unused-parameter -gsplit-dwarf -g -gdwarf-5 -fno-var-tracking -DRANDSTRUCT -frandomize-layout-seed-file=./scripts/basic/randstruct.seed -fno-crash-diagnostics -Wno-error=return-type -Wreturn-type -funsigned-char -Wundef -falign-functions=64 -Idrivers/iio/common/hid-sensors -Idrivers/iio/humidity -Idrivers/iio/humidity -ffunction-sections -fdata-sections -DKBUILD_MODFILE=\"drivers/iio/humidity/hdc3020\" -DKBUILD_BASENAME=\"hdc3020\" -DKBUILD_MODNAME=\"hdc3020\" -D__KBUILD_MODNAME=kmod_hdc3020 -c -o drivers/iio/humidity/hdc3020.o drivers/iio/humidity/hdc3020.c
   1.	<eof> parser at end of file
   2.	Code generation
   3.	Running pass 'Function Pass Manager' on module 'drivers/iio/humidity/hdc3020.c'.
   4.	Running pass 'Shrink Wrapping analysis' on function '@hdc3020_write_thresh'
    #0 0x00005652d197014a llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (clang-24+0x38b514a)
    #1 0x00005652d196dd24 llvm::sys::CleanupOnSignal(unsigned long) (clang-24+0x38b2d24)
    #2 0x00005652d18a3240 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
    #3 0x00007f287ba9fdf0 (/lib/x86_64-linux-gnu/libc.so.6+0x3fdf0)
    #4 0x00005652d0f46bce (anonymous namespace)::ShrinkWrapImpl::useOrDefCSROrFI(llvm::MachineInstr const&, llvm::RegScavenger*, bool) const ShrinkWrap.cpp:0:0
    #5 0x00005652d0f4a02c (anonymous namespace)::ShrinkWrapImpl::run(llvm::MachineFunction&) ShrinkWrap.cpp:0:0
    #6 0x00005652d0f4b9e8 (anonymous namespace)::ShrinkWrapLegacy::runOnMachineFunction(llvm::MachineFunction&) (.part.0) ShrinkWrap.cpp:0:0
    #7 0x00005652d0d26273 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (clang-24+0x2c6b273)
    #8 0x00005652d127a179 llvm::FPPassManager::runOnFunction(llvm::Function&) (clang-24+0x31bf179)
    #9 0x00005652d127a5ac llvm::FPPassManager::runOnModule(llvm::Module&) (clang-24+0x31bf5ac)
   #10 0x00005652d127b14a (anonymous namespace)::MPPassManager::runOnModule(llvm::Module&) LegacyPassManager.cpp:0:0
   #11 0x00005652d127b81c llvm::legacy::PassManagerImpl::run(llvm::Module&) (clang-24+0x31c081c)
   #12 0x00005652d1d1f5bf (anonymous namespace)::EmitAssemblyHelper::TimeCodegenPasses(llvm::function_ref<void ()>) BackendUtil.cpp:0:0
   #13 0x00005652d1d309ba (anonymous namespace)::EmitAssemblyHelper::emitAssembly(clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream>>, clang::BackendConsumer*) (.constprop.0) BackendUtil.cpp:0:0
   #14 0x00005652d1d30baf clang::emitBackendOutput(clang::CompilerInstance&, clang::CodeGenOptions&, 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>>, clang::BackendConsumer*) (clang-24+0x3c75baf)
   #15 0x00005652d236b587 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (clang-24+0x42b0587)
   #16 0x00005652d3d71a8c clang::ParseAST(clang::Sema&, bool, bool) (clang-24+0x5cb6a8c)
   #17 0x00005652d26ca8de clang::FrontendAction::Execute() (clang-24+0x460f8de)
   #18 0x00005652d2656ade clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (clang-24+0x459bade)
   #19 0x00005652d2799407 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (clang-24+0x46de407)
   #20 0x00005652ce995d88 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (clang-24+0x8dad88)
   #21 0x00005652ce98da53 ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>) driver.cpp:0:0
   #22 0x00005652ce98da93 int llvm::function_ref<int (llvm::SmallVectorImpl<char const*>&)>::callback_fn<clang_main(int, char**, llvm::ToolContext const&)::'lambda'(llvm::SmallVectorImpl<char const*>&)>(long, llvm::SmallVectorImpl<char const*>&) driver.cpp:0:0
   #23 0x00005652d23e91c9 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::'lambda'()>(long) Job.cpp:0:0
   #24 0x00005652d18a35a3 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (clang-24+0x37e85a3)
   #25 0x00005652d23ea74c clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const (.part.0) Job.cpp:0:0
   #26 0x00005652d23a2f58 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (clang-24+0x42e7f58)
   #27 0x00005652d23a7792 clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (clang-24+0x42ec792)
   #28 0x00005652d23b959c clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (clang-24+0x42fe59c)
   #29 0x00005652ce992712 clang_main(int, char**, llvm::ToolContext const&) (clang-24+0x8d7712)
   #30 0x00005652ce8adfd9 main (clang-24+0x7f2fd9)
   #31 0x00007f287ba89ca8 (/lib/x86_64-linux-gnu/libc.so.6+0x29ca8)
   #32 0x00007f287ba89d65 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29d65)
   #33 0x00005652ce98d4b1 _start (clang-24+0x8d24b1)
   clang: error: clang frontend command failed due to signal (use -v to see invocation)
>> /bin/bash: line 1: 3134535 Segmentation fault      clang -Wp,-MMD,drivers/iio/humidity/.hdc3020.o.d -nostdinc -Iarch/mips/include -I./arch/mips/include/generated -Iinclude -I./include -Iarch/mips/include/uapi -I./arch/mips/include/generated/uapi -Iinclude/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=mipsel-linux-gnu -fintegrated-as -Werror=unknown-warning-option -Werror=ignored-optimization-argument -Werror=option-ignored -Werror=unused-command-line-argument -DVMLINUX_LOAD_ADDRESS=0xffffffff84000000 -DLINKER_LOAD_ADDRESS=0x84000000 -DDATAOFFSET=0 -fmacro-prefix-map== -Wundef -DKBUILD_EXTRA_WARN1 -std=gnu11 -fshort-wchar -funsigned-char -fno-common -fno-PIE -fno-strict-aliasing -mno-check-zero-division -mabi=32 -G 0 -mno-abicalls -fno-pic -pipe -msoft-float -Wa,-msoft-float -ffreestanding -EL -fno-stack-check -march=mips1 -DTOOLCHAIN_SUPPORTS_VIRT -Iarch/mips/include/asm/mach-dec -Iarch/mips/include/asm/mach-generic -fno-asynchronous-unwind-tables -fno-delete-null-pointer-checks -O2 -fno-stack-protector -fomit-frame-pointer -ftrivial-auto-var-init=zero -fstrict-flex-arrays=3 -fno-strict-overflow -fno-stack-check -fno-builtin-wcslen -Wall -Wextra -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-format-overflow-non-kprintf -Wno-format-truncation-non-kprintf -Wno-default-const-init-unsafe -Wno-pointer-sign -Wcast-function-type -Wno-unterminated-string-initialization -Wimplicit-fallthrough -Werror=date-time -Werror=incompatible-pointer-types -Wenum-conversion -Wunused -Wmissing-format-attribute -Wmissing-include-dirs -Wunused-const-variable -Wno-missing-field-initializers -Wno-type-limits -Wno-shift-negative-value -Wno-enum-enum-conversion -Wno-sign-compare -Wno-unused-parameter -gsplit-dwarf -g -gdwarf-5 -fno-var-tracking -DRANDSTRUCT -frandomize-layout-seed-file=./scripts/basic/randstruct.seed -fno-crash-diagnostics -Wno-error=return-type -Wreturn-type -funsigned-char -Wundef -falign-functions=64 -Idrivers/iio/common/hid-sensors -Idrivers/iio/humidity -Idrivers/iio/humidity -ffunction-sections -fdata-sections -DKBUILD_MODFILE='"drivers/iio/humidity/hdc3020"' -DKBUILD_BASENAME='"hdc3020"' -DKBUILD_MODNAME='"hdc3020"' -D__KBUILD_MODNAME=kmod_hdc3020 -c -o drivers/iio/humidity/hdc3020.o drivers/iio/humidity/hdc3020.c

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for I2C_K1
   Depends on [n]: I2C [=y] && HAS_IOMEM [=y] && (ARCH_SPACEMIT || COMPILE_TEST [=y]) && OF [=n]
   Selected by [m]:
   - MFD_SPACEMIT_P1 [=m] && HAS_IOMEM [=y] && (ARCH_SPACEMIT || COMPILE_TEST [=y]) && I2C [=y]

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