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* [dhowells-fs:netfs-folio-regions 11/28] fs/netfs/read_helper.c:979:13: warning: variable 'folio' is uninitialized when used here
@ 2021-08-19 19:07 kernel test robot
  2021-08-19 19:59 ` Nathan Chancellor
  0 siblings, 1 reply; 3+ messages in thread
From: kernel test robot @ 2021-08-19 19:07 UTC (permalink / raw)
  To: David Howells; +Cc: clang-built-linux, kbuild-all, linux-kernel

[-- Attachment #1: Type: text/plain, Size: 13860 bytes --]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git netfs-folio-regions
head:   215a4ee495a95cc73256ed76f91cb78bcabd6b8e
commit: 90417b52931da8cb4eb670c3cc22bfa12aabe55c [11/28] netfs: Use a buffer in netfs_read_request and add pages to it
config: hexagon-randconfig-r041-20210818 (attached as .config)
compiler: clang version 12.0.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/commit/?id=90417b52931da8cb4eb670c3cc22bfa12aabe55c
        git remote add dhowells-fs https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git
        git fetch --no-tags dhowells-fs netfs-folio-regions
        git checkout 90417b52931da8cb4eb670c3cc22bfa12aabe55c
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=hexagon SHELL=/bin/bash fs/netfs/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> fs/netfs/read_helper.c:979:13: warning: variable 'folio' is uninitialized when used here
   folio_get(folio);
   ^~~~~
   fs/netfs/read_helper.c:932:21: note: initialize the variable 'folio' to silence this warning
   struct folio
   ^
   = NULL
   fatal error: error in backend: Misaligned constant address: 0x0000001b has alignment 1, but the memory access requires 4
   PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace, preprocessed source, and associated run script.
   Stack dump:
   0. Program arguments: clang -Wp,-MMD,fs/netfs/.read_helper.o.d -nostdinc -isystem /opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/lib/clang/12.0.0/include -Iarch/hexagon/include -I./arch/hexagon/include/generated -Iinclude -I./include -Iarch/hexagon/include/uapi -I./arch/hexagon/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__ -Qunused-arguments -fmacro-prefix-map== -DKBUILD_EXTRA_WARN1 -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Werror=return-type -Wno-format-security -std=gnu89 --target=hexagon-unknown-linux-musl -integrated-as -Werror=unknown-warning-option -G0 -fno-short-enums -mlong-calls -ffixed-r19 -DTHREADINFO_REG=r19 -D__linux__ -fno-delete-null-pointer-checks -Wno-frame-address -Wno-address-of-packed-member -O2 -Wframe-larger-than=1024 -fno-stack-protector -Wno-format-invalid-specifier -Wno-gnu -mno-global-merge -Wno-unused-const-variable -fno-omit-frame-pointer -fno-optimize-sibling-calls -ftrivial-auto-var-init=pattern -fno-stack-clash-protection -falign-functions=64 -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-array-bounds -fno-strict-overflow -fno-stack-check -Werror=date-time -Werror=incompatible-pointer-types -Wextra -Wunused -Wno-unused-parameter -Wmissing-declarations -Wmissing-format-attribute -Wmissing-prototypes -Wold-style-definition -Wmissing-include-dirs -Wunused-const-variable -Wno-missing-field-initializers -Wno-sign-compare -Wno-type-limits -I fs/netfs -I ./fs/netfs -DKBUILD_MODFILE="fs/netfs/netfs" -DKBUILD_BASENAME="read_helper" -DKBUILD_MODNAME="netfs" -D__KBUILD_MODNAME=kmod_netfs -c -o fs/netfs/read_helper.o fs/netfs/read_helper.c
   1. <eof> parser at end of file
   2. Code generation
   3. Running pass 'Function Pass Manager' on module 'fs/netfs/read_helper.c'.
   4. Running pass 'Hexagon DAG->DAG Pattern Instruction Selection' on function '@netfs_rreq_set_up_buffer'
   #0 0x000000000355d1fc llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x355d1fc)
   #1 0x000000000355afbe llvm::sys::RunSignalHandlers() (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x355afbe)
   #2 0x000000000355c55d llvm::sys::CleanupOnSignal(unsigned long) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x355c55d)
   #3 0x00000000034d5aed (anonymous namespace)::CrashRecoveryContextImpl::HandleCrash(int, unsigned long) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x34d5aed)
   #4 0x00000000034d5a79 llvm::CrashRecoveryContext::HandleExit(int) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x34d5a79)
   #5 0x0000000003557e07 llvm::sys::Process::Exit(int, bool) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3557e07)
   #6 0x0000000002107e10 llvm::DenseMapBase<llvm::DenseMap<llvm::AliasSetTracker::ASTCallbackVH, llvm::AliasSetTracker::ASTCallbackVHDenseMapInfo, llvm::detail::DenseMapPair<llvm::AliasSetTracker::ASTCallbackVH, >, llvm::AliasSetTracker::ASTCallbackVH, llvm::AliasSetTracker::ASTCallbackVHDenseMapInfo, llvm::detail::DenseMapPair<llvm::AliasSetTracker::ASTCallbackVH, >::destroyAll() (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x2107e10)
   #7 0x00000000034da319 llvm::report_fatal_error(llvm::Twine const&, bool) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x34da319)
   #8 0x00000000034da3e7 (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x34da3e7)
   #9 0x0000000002411b46 (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x2411b46)
   #10 0x00000000024183c0 llvm::HexagonTargetLowering::LowerLoad(llvm::SDValue, llvm::SelectionDAG&) const (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x24183c0)
   #11 0x0000000002419cbb llvm::HexagonTargetLowering::LowerOperation(llvm::SDValue, llvm::SelectionDAG&) const (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x2419cbb)
   #12 0x00000000042c3b6a (anonymous (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x42c3b6a)
   #13 0x00000000042a61af (anonymous (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x42a61af)
   #14 0x00000000042a5443 llvm::SelectionDAG::Legalize() (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x42a5443)
   #15 0x0000000004375361 llvm::SelectionDAGISel::CodeGenAndEmitDAG() (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x4375361)
   #16 0x0000000004373545 llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x4373545)
   #17 0x00000000043703b7 llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x43703b7)
   #18 0x00000000024690c4 llvm::HexagonDAGToDAGISel::runOnMachineFunction(llvm::MachineFunction&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x24690c4)
   #19 0x000000000290c1bd llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x290c1bd)
   #20 0x0000000002d6a745 llvm::FPPassManager::runOnFunction(llvm::Function&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x2d6a745)
   #21 0x0000000002d70c51 llvm::FPPassManager::runOnModule(llvm::Module&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x2d70c51)
   #22 0x0000000002d6adaa llvm::legacy::PassManagerImpl::run(llvm::Module&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x2d6adaa)
   #23 0x000000000378e9a0 clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::HeaderSearchOptions const&, clang::CodeGenOptions const&, clang::TargetOptions const&, clang::LangOptions const&, llvm::DataLayout const&, clang::BackendAction, std::__1::unique_ptr<llvm::raw_pwrite_stream, std::__1::default_delete<llvm::raw_pwrite_stream> >) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x378e9a0)
   #24 0x0000000003ebec56 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3ebec56)
   #25 0x0000000004dbbc84 clang::ParseAST(clang::Sema&, bool, bool) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x4dbbc84)
   #26 0x0000000003e0d560 clang::FrontendAction::Execute() (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3e0d560)
   #27 0x0000000003d596da clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3d596da)
   #28 0x0000000003eb890e (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3eb890e)
   #29 0x0000000002107abe cc1_main(llvm::ArrayRef<char char (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x2107abe)
   #30 0x00000000021054ee ExecuteCC1Tool(llvm::SmallVectorImpl<char (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x21054ee)
   #31 0x0000000003c04bd2 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optional<llvm::StringRef> >, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> const::$_1>(long) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3c04bd2)
   #32 0x00000000034d5a2b llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x34d5a2b)
   #33 0x0000000003c043c5 clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optional<llvm::StringRef> >, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> const (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3c043c5)
   #34 0x0000000003bcc196 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3bcc196)
   #35 0x0000000003bcc617 clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::__1::pair<int, clang::driver::Command >&) const (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3bcc617)
   #36 0x0000000003be5a81 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::__1::pair<int, clang::driver::Command >&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3be5a81)
   #37 0x0000000002104e21 main (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x2104e21)
   #38 0x00007f04bb011d0a __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x26d0a)
   #39 0x0000000002102299 _start (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x2102299)
   clang-12: error: clang frontend command failed with exit code 70 (use -v to see invocation)
   clang version 12.0.0
   Target: hexagon-unknown-linux-musl
   Thread model: posix
   InstalledDir: /opt/cross/clang_hexagon/x86_64-linux-gnu/bin
   clang-12: note: diagnostic msg:
   Makefile arch fs include kernel nr_bisected scripts source usr


vim +/folio +979 fs/netfs/read_helper.c

   947	
   948		ret = netfs_rreq_add_folios_to_buffer(rreq, want_index, have_index - 1,
   949						      gfp_mask);
   950		if (ret < 0)
   951			return ret;
   952		have_folios += have_index - want_index;
   953	
   954		ret = netfs_rreq_add_folios_to_buffer(rreq, have_index + have_folios,
   955						      want_index + want_folios - 1,
   956						      gfp_mask);
   957		if (ret < 0)
   958			return ret;
   959	
   960		/* Transfer the folios proposed by the VM into the buffer and take refs
   961		 * on them.  The locks will be dropped in netfs_rreq_unlock().
   962		 */
   963		if (ractl) {
   964			while ((folio = readahead_folio(ractl))) {
   965				folio_get(folio);
   966				if (folio == keep)
   967					folio_get(folio);
   968				ret = xa_insert_set_mark(&rreq->buffer,
   969							 folio_index(folio), folio,
   970							 XA_MARK_0, gfp_mask);
   971				if (ret < 0) {
   972					if (folio != keep)
   973						folio_unlock(folio);
   974					folio_put(folio);
   975					return ret;
   976				}
   977			}
   978		} else {
 > 979			folio_get(folio);
   980			ret = xa_insert_set_mark(&rreq->buffer, keep->index, keep,
   981						 XA_MARK_0, gfp_mask);
   982			if (ret < 0) {
   983				folio_put(folio);
   984				return ret;
   985			}
   986		}
   987		return 0;
   988	}
   989	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 26608 bytes --]

^ permalink raw reply	[flat|nested] 3+ messages in thread
* Re: [dhowells-fs:netfs-folio-regions 11/28] fs/netfs/read_helper.c:979:13: warning: variable 'folio' is uninitialized when used here
  2021-08-19 19:07 [dhowells-fs:netfs-folio-regions 11/28] fs/netfs/read_helper.c:979:13: warning: variable 'folio' is uninitialized when used here kernel test robot
@ 2021-08-19 19:59 ` Nathan Chancellor
  2021-08-20  1:36   ` Philip Li
  0 siblings, 1 reply; 3+ messages in thread
From: Nathan Chancellor @ 2021-08-19 19:59 UTC (permalink / raw)
  To: kernel test robot, Philip Li
  Cc: David Howells, clang-built-linux, kbuild-all, linux-kernel

On Fri, Aug 20, 2021 at 03:07:06AM +0800, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git netfs-folio-regions
> head:   215a4ee495a95cc73256ed76f91cb78bcabd6b8e
> commit: 90417b52931da8cb4eb670c3cc22bfa12aabe55c [11/28] netfs: Use a buffer in netfs_read_request and add pages to it
> config: hexagon-randconfig-r041-20210818 (attached as .config)
> compiler: clang version 12.0.0
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/commit/?id=90417b52931da8cb4eb670c3cc22bfa12aabe55c
>         git remote add dhowells-fs https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git
>         git fetch --no-tags dhowells-fs netfs-folio-regions
>         git checkout 90417b52931da8cb4eb670c3cc22bfa12aabe55c
>         # save the attached .config to linux build tree
>         mkdir build_dir
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=hexagon SHELL=/bin/bash fs/netfs/
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
> 
> All warnings (new ones prefixed by >>):
> 
> >> fs/netfs/read_helper.c:979:13: warning: variable 'folio' is uninitialized when used here
>    folio_get(folio);
>    ^~~~~
>    fs/netfs/read_helper.c:932:21: note: initialize the variable 'folio' to silence this warning
>    struct folio
>    ^
>    = NULL
>    fatal error: error in backend: Misaligned constant address: 0x0000001b has alignment 1, but the memory access requires 4

This crash has been fixed in clang-13 [1]. Philip, would it be possible for
the robot to use the same clang version for Hexagon that you use for all of the
other architectures? It should have no issues, as we are using it in our
CI. If there are, please let me know so I can try to get them triaged
and fixed upstream,

[1] https://bugs.llvm.org/show_bug.cgi?id=50838

Cheers,
Nathan

>    PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace, preprocessed source, and associated run script.
>    Stack dump:
>    0. Program arguments: clang -Wp,-MMD,fs/netfs/.read_helper.o.d -nostdinc -isystem /opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/lib/clang/12.0.0/include -Iarch/hexagon/include -I./arch/hexagon/include/generated -Iinclude -I./include -Iarch/hexagon/include/uapi -I./arch/hexagon/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__ -Qunused-arguments -fmacro-prefix-map== -DKBUILD_EXTRA_WARN1 -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Werror=return-type -Wno-format-security -std=gnu89 --target=hexagon-unknown-linux-musl -integrated-as -Werror=unknown-warning-option -G0 -fno-short-enums -mlong-calls -ffixed-r19 -DTHREADINFO_REG=r19 -D__linux__ -fno-delete-null-pointer-checks -Wno-frame-address -Wno-address-of-packed-member -O2 -Wframe-larger-than=1024 -fno-stack-protector -Wno-format-invalid-specifier -Wno-gnu -mno-global-merge -Wno-unused-const-variable -fno-omit-frame-pointer -fno-optimize-sibling-calls -ftrivial-auto-var-init=pattern -fno-stack-clash-protection -falign-functions=64 -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-array-bounds -fno-strict-overflow -fno-stack-check -Werror=date-time -Werror=incompatible-pointer-types -Wextra -Wunused -Wno-unused-parameter -Wmissing-declarations -Wmissing-format-attribute -Wmissing-prototypes -Wold-style-definition -Wmissing-include-dirs -Wunused-const-variable -Wno-missing-field-initializers -Wno-sign-compare -Wno-type-limits -I fs/netfs -I ./fs/netfs -DKBUILD_MODFILE="fs/netfs/netfs" -DKBUILD_BASENAME="read_helper" -DKBUILD_MODNAME="netfs" -D__KBUILD_MODNAME=kmod_netfs -c -o fs/netfs/read_helper.o fs/netfs/read_helper.c
>    1. <eof> parser at end of file
>    2. Code generation
>    3. Running pass 'Function Pass Manager' on module 'fs/netfs/read_helper.c'.
>    4. Running pass 'Hexagon DAG->DAG Pattern Instruction Selection' on function '@netfs_rreq_set_up_buffer'
>    #0 0x000000000355d1fc llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x355d1fc)
>    #1 0x000000000355afbe llvm::sys::RunSignalHandlers() (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x355afbe)
>    #2 0x000000000355c55d llvm::sys::CleanupOnSignal(unsigned long) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x355c55d)
>    #3 0x00000000034d5aed (anonymous namespace)::CrashRecoveryContextImpl::HandleCrash(int, unsigned long) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x34d5aed)
>    #4 0x00000000034d5a79 llvm::CrashRecoveryContext::HandleExit(int) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x34d5a79)
>    #5 0x0000000003557e07 llvm::sys::Process::Exit(int, bool) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3557e07)
>    #6 0x0000000002107e10 llvm::DenseMapBase<llvm::DenseMap<llvm::AliasSetTracker::ASTCallbackVH, llvm::AliasSetTracker::ASTCallbackVHDenseMapInfo, llvm::detail::DenseMapPair<llvm::AliasSetTracker::ASTCallbackVH, >, llvm::AliasSetTracker::ASTCallbackVH, llvm::AliasSetTracker::ASTCallbackVHDenseMapInfo, llvm::detail::DenseMapPair<llvm::AliasSetTracker::ASTCallbackVH, >::destroyAll() (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x2107e10)
>    #7 0x00000000034da319 llvm::report_fatal_error(llvm::Twine const&, bool) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x34da319)
>    #8 0x00000000034da3e7 (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x34da3e7)
>    #9 0x0000000002411b46 (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x2411b46)
>    #10 0x00000000024183c0 llvm::HexagonTargetLowering::LowerLoad(llvm::SDValue, llvm::SelectionDAG&) const (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x24183c0)
>    #11 0x0000000002419cbb llvm::HexagonTargetLowering::LowerOperation(llvm::SDValue, llvm::SelectionDAG&) const (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x2419cbb)
>    #12 0x00000000042c3b6a (anonymous (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x42c3b6a)
>    #13 0x00000000042a61af (anonymous (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x42a61af)
>    #14 0x00000000042a5443 llvm::SelectionDAG::Legalize() (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x42a5443)
>    #15 0x0000000004375361 llvm::SelectionDAGISel::CodeGenAndEmitDAG() (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x4375361)
>    #16 0x0000000004373545 llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x4373545)
>    #17 0x00000000043703b7 llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x43703b7)
>    #18 0x00000000024690c4 llvm::HexagonDAGToDAGISel::runOnMachineFunction(llvm::MachineFunction&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x24690c4)
>    #19 0x000000000290c1bd llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x290c1bd)
>    #20 0x0000000002d6a745 llvm::FPPassManager::runOnFunction(llvm::Function&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x2d6a745)
>    #21 0x0000000002d70c51 llvm::FPPassManager::runOnModule(llvm::Module&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x2d70c51)
>    #22 0x0000000002d6adaa llvm::legacy::PassManagerImpl::run(llvm::Module&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x2d6adaa)
>    #23 0x000000000378e9a0 clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::HeaderSearchOptions const&, clang::CodeGenOptions const&, clang::TargetOptions const&, clang::LangOptions const&, llvm::DataLayout const&, clang::BackendAction, std::__1::unique_ptr<llvm::raw_pwrite_stream, std::__1::default_delete<llvm::raw_pwrite_stream> >) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x378e9a0)
>    #24 0x0000000003ebec56 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3ebec56)
>    #25 0x0000000004dbbc84 clang::ParseAST(clang::Sema&, bool, bool) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x4dbbc84)
>    #26 0x0000000003e0d560 clang::FrontendAction::Execute() (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3e0d560)
>    #27 0x0000000003d596da clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3d596da)
>    #28 0x0000000003eb890e (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3eb890e)
>    #29 0x0000000002107abe cc1_main(llvm::ArrayRef<char char (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x2107abe)
>    #30 0x00000000021054ee ExecuteCC1Tool(llvm::SmallVectorImpl<char (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x21054ee)
>    #31 0x0000000003c04bd2 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optional<llvm::StringRef> >, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> const::$_1>(long) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3c04bd2)
>    #32 0x00000000034d5a2b llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x34d5a2b)
>    #33 0x0000000003c043c5 clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optional<llvm::StringRef> >, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> const (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3c043c5)
>    #34 0x0000000003bcc196 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3bcc196)
>    #35 0x0000000003bcc617 clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::__1::pair<int, clang::driver::Command >&) const (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3bcc617)
>    #36 0x0000000003be5a81 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::__1::pair<int, clang::driver::Command >&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3be5a81)
>    #37 0x0000000002104e21 main (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x2104e21)
>    #38 0x00007f04bb011d0a __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x26d0a)
>    #39 0x0000000002102299 _start (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x2102299)
>    clang-12: error: clang frontend command failed with exit code 70 (use -v to see invocation)
>    clang version 12.0.0
>    Target: hexagon-unknown-linux-musl
>    Thread model: posix
>    InstalledDir: /opt/cross/clang_hexagon/x86_64-linux-gnu/bin
>    clang-12: note: diagnostic msg:
>    Makefile arch fs include kernel nr_bisected scripts source usr
> 
> 
> vim +/folio +979 fs/netfs/read_helper.c
> 
>    947	
>    948		ret = netfs_rreq_add_folios_to_buffer(rreq, want_index, have_index - 1,
>    949						      gfp_mask);
>    950		if (ret < 0)
>    951			return ret;
>    952		have_folios += have_index - want_index;
>    953	
>    954		ret = netfs_rreq_add_folios_to_buffer(rreq, have_index + have_folios,
>    955						      want_index + want_folios - 1,
>    956						      gfp_mask);
>    957		if (ret < 0)
>    958			return ret;
>    959	
>    960		/* Transfer the folios proposed by the VM into the buffer and take refs
>    961		 * on them.  The locks will be dropped in netfs_rreq_unlock().
>    962		 */
>    963		if (ractl) {
>    964			while ((folio = readahead_folio(ractl))) {
>    965				folio_get(folio);
>    966				if (folio == keep)
>    967					folio_get(folio);
>    968				ret = xa_insert_set_mark(&rreq->buffer,
>    969							 folio_index(folio), folio,
>    970							 XA_MARK_0, gfp_mask);
>    971				if (ret < 0) {
>    972					if (folio != keep)
>    973						folio_unlock(folio);
>    974					folio_put(folio);
>    975					return ret;
>    976				}
>    977			}
>    978		} else {
>  > 979			folio_get(folio);
>    980			ret = xa_insert_set_mark(&rreq->buffer, keep->index, keep,
>    981						 XA_MARK_0, gfp_mask);
>    982			if (ret < 0) {
>    983				folio_put(folio);
>    984				return ret;
>    985			}
>    986		}
>    987		return 0;
>    988	}
>    989	
> 
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org



^ permalink raw reply	[flat|nested] 3+ messages in thread
* Re: [dhowells-fs:netfs-folio-regions 11/28] fs/netfs/read_helper.c:979:13: warning: variable 'folio' is uninitialized when used here
  2021-08-19 19:59 ` Nathan Chancellor
@ 2021-08-20  1:36   ` Philip Li
  0 siblings, 0 replies; 3+ messages in thread
From: Philip Li @ 2021-08-20  1:36 UTC (permalink / raw)
  To: Nathan Chancellor
  Cc: kernel test robot, David Howells, clang-built-linux, kbuild-all,
	linux-kernel

On Thu, Aug 19, 2021 at 12:59:06PM -0700, Nathan Chancellor wrote:
> On Fri, Aug 20, 2021 at 03:07:06AM +0800, kernel test robot wrote:
> > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git netfs-folio-regions
> > head:   215a4ee495a95cc73256ed76f91cb78bcabd6b8e
> > commit: 90417b52931da8cb4eb670c3cc22bfa12aabe55c [11/28] netfs: Use a buffer in netfs_read_request and add pages to it
> > config: hexagon-randconfig-r041-20210818 (attached as .config)
> > compiler: clang version 12.0.0
> > reproduce (this is a W=1 build):
> >         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> >         chmod +x ~/bin/make.cross
> >         # https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/commit/?id=90417b52931da8cb4eb670c3cc22bfa12aabe55c
> >         git remote add dhowells-fs https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git
> >         git fetch --no-tags dhowells-fs netfs-folio-regions
> >         git checkout 90417b52931da8cb4eb670c3cc22bfa12aabe55c
> >         # save the attached .config to linux build tree
> >         mkdir build_dir
> >         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=hexagon SHELL=/bin/bash fs/netfs/
> > 
> > If you fix the issue, kindly add following tag as appropriate
> > Reported-by: kernel test robot <lkp@intel.com>
> > 
> > All warnings (new ones prefixed by >>):
> > 
> > >> fs/netfs/read_helper.c:979:13: warning: variable 'folio' is uninitialized when used here
> >    folio_get(folio);
> >    ^~~~~
> >    fs/netfs/read_helper.c:932:21: note: initialize the variable 'folio' to silence this warning
> >    struct folio
> >    ^
> >    = NULL
> >    fatal error: error in backend: Misaligned constant address: 0x0000001b has alignment 1, but the memory access requires 4
> 
> This crash has been fixed in clang-13 [1]. Philip, would it be possible for
> the robot to use the same clang version for Hexagon that you use for all of the
> other architectures? It should have no issues, as we are using it in our
got it Nathan, we will switch hexagon to the same as other archs today.

> CI. If there are, please let me know so I can try to get them triaged
> and fixed upstream,
> 
> [1] https://bugs.llvm.org/show_bug.cgi?id=50838
> 
> Cheers,
> Nathan
> 
> >    PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace, preprocessed source, and associated run script.
> >    Stack dump:
> >    0. Program arguments: clang -Wp,-MMD,fs/netfs/.read_helper.o.d -nostdinc -isystem /opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/lib/clang/12.0.0/include -Iarch/hexagon/include -I./arch/hexagon/include/generated -Iinclude -I./include -Iarch/hexagon/include/uapi -I./arch/hexagon/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__ -Qunused-arguments -fmacro-prefix-map== -DKBUILD_EXTRA_WARN1 -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Werror=return-type -Wno-format-security -std=gnu89 --target=hexagon-unknown-linux-musl -integrated-as -Werror=unknown-warning-option -G0 -fno-short-enums -mlong-calls -ffixed-r19 -DTHREADINFO_REG=r19 -D__linux__ -fno-delete-null-pointer-checks -Wno-frame-
 address -Wno-address-of-packed-member -O2 -Wframe-larger-than=1024 -fno-stack-protector -Wno-format-invalid-specifier -Wno-gnu -mno-global-merge -Wno-unused-const-variable -fno-omit-frame-pointer -fno-optimize-sibling-calls -ftrivial-auto-var-init=pattern -fno-stack-clash-protection -falign-functions=64 -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-array-bounds -fno-strict-overflow -fno-stack-check -Werror=date-time -Werror=incompatible-pointer-types -Wextra -Wunused -Wno-unused-parameter -Wmissing-declarations -Wmissing-format-attribute -Wmissing-prototypes -Wold-style-definition -Wmissing-include-dirs -Wunused-const-variable -Wno-missing-field-initializers -Wno-sign-compare -Wno-type-limits -I fs/netfs -I ./fs/netfs -DKBUILD_MODFILE="fs/netfs/netfs" -DKBUILD_BASENAME="read_helper" -DKBUILD_MODNAME="netfs" -D__KBUILD_MODNAME=kmod_netfs -c -o fs/netfs/read_helper.o fs/netfs/read_helper.c
> >    1. <eof> parser at end of file
> >    2. Code generation
> >    3. Running pass 'Function Pass Manager' on module 'fs/netfs/read_helper.c'.
> >    4. Running pass 'Hexagon DAG->DAG Pattern Instruction Selection' on function '@netfs_rreq_set_up_buffer'
> >    #0 0x000000000355d1fc llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x355d1fc)
> >    #1 0x000000000355afbe llvm::sys::RunSignalHandlers() (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x355afbe)
> >    #2 0x000000000355c55d llvm::sys::CleanupOnSignal(unsigned long) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x355c55d)
> >    #3 0x00000000034d5aed (anonymous namespace)::CrashRecoveryContextImpl::HandleCrash(int, unsigned long) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x34d5aed)
> >    #4 0x00000000034d5a79 llvm::CrashRecoveryContext::HandleExit(int) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x34d5a79)
> >    #5 0x0000000003557e07 llvm::sys::Process::Exit(int, bool) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3557e07)
> >    #6 0x0000000002107e10 llvm::DenseMapBase<llvm::DenseMap<llvm::AliasSetTracker::ASTCallbackVH, llvm::AliasSetTracker::ASTCallbackVHDenseMapInfo, llvm::detail::DenseMapPair<llvm::AliasSetTracker::ASTCallbackVH, >, llvm::AliasSetTracker::ASTCallbackVH, llvm::AliasSetTracker::ASTCallbackVHDenseMapInfo, llvm::detail::DenseMapPair<llvm::AliasSetTracker::ASTCallbackVH, >::destroyAll() (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x2107e10)
> >    #7 0x00000000034da319 llvm::report_fatal_error(llvm::Twine const&, bool) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x34da319)
> >    #8 0x00000000034da3e7 (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x34da3e7)
> >    #9 0x0000000002411b46 (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x2411b46)
> >    #10 0x00000000024183c0 llvm::HexagonTargetLowering::LowerLoad(llvm::SDValue, llvm::SelectionDAG&) const (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x24183c0)
> >    #11 0x0000000002419cbb llvm::HexagonTargetLowering::LowerOperation(llvm::SDValue, llvm::SelectionDAG&) const (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x2419cbb)
> >    #12 0x00000000042c3b6a (anonymous (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x42c3b6a)
> >    #13 0x00000000042a61af (anonymous (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x42a61af)
> >    #14 0x00000000042a5443 llvm::SelectionDAG::Legalize() (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x42a5443)
> >    #15 0x0000000004375361 llvm::SelectionDAGISel::CodeGenAndEmitDAG() (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x4375361)
> >    #16 0x0000000004373545 llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x4373545)
> >    #17 0x00000000043703b7 llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x43703b7)
> >    #18 0x00000000024690c4 llvm::HexagonDAGToDAGISel::runOnMachineFunction(llvm::MachineFunction&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x24690c4)
> >    #19 0x000000000290c1bd llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x290c1bd)
> >    #20 0x0000000002d6a745 llvm::FPPassManager::runOnFunction(llvm::Function&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x2d6a745)
> >    #21 0x0000000002d70c51 llvm::FPPassManager::runOnModule(llvm::Module&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x2d70c51)
> >    #22 0x0000000002d6adaa llvm::legacy::PassManagerImpl::run(llvm::Module&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x2d6adaa)
> >    #23 0x000000000378e9a0 clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::HeaderSearchOptions const&, clang::CodeGenOptions const&, clang::TargetOptions const&, clang::LangOptions const&, llvm::DataLayout const&, clang::BackendAction, std::__1::unique_ptr<llvm::raw_pwrite_stream, std::__1::default_delete<llvm::raw_pwrite_stream> >) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x378e9a0)
> >    #24 0x0000000003ebec56 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3ebec56)
> >    #25 0x0000000004dbbc84 clang::ParseAST(clang::Sema&, bool, bool) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x4dbbc84)
> >    #26 0x0000000003e0d560 clang::FrontendAction::Execute() (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3e0d560)
> >    #27 0x0000000003d596da clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3d596da)
> >    #28 0x0000000003eb890e (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3eb890e)
> >    #29 0x0000000002107abe cc1_main(llvm::ArrayRef<char char (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x2107abe)
> >    #30 0x00000000021054ee ExecuteCC1Tool(llvm::SmallVectorImpl<char (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x21054ee)
> >    #31 0x0000000003c04bd2 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optional<llvm::StringRef> >, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> const::$_1>(long) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3c04bd2)
> >    #32 0x00000000034d5a2b llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x34d5a2b)
> >    #33 0x0000000003c043c5 clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optional<llvm::StringRef> >, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> const (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3c043c5)
> >    #34 0x0000000003bcc196 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3bcc196)
> >    #35 0x0000000003bcc617 clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::__1::pair<int, clang::driver::Command >&) const (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3bcc617)
> >    #36 0x0000000003be5a81 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::__1::pair<int, clang::driver::Command >&) (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x3be5a81)
> >    #37 0x0000000002104e21 main (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x2104e21)
> >    #38 0x00007f04bb011d0a __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x26d0a)
> >    #39 0x0000000002102299 _start (/opt/cross/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/clang-12+0x2102299)
> >    clang-12: error: clang frontend command failed with exit code 70 (use -v to see invocation)
> >    clang version 12.0.0
> >    Target: hexagon-unknown-linux-musl
> >    Thread model: posix
> >    InstalledDir: /opt/cross/clang_hexagon/x86_64-linux-gnu/bin
> >    clang-12: note: diagnostic msg:
> >    Makefile arch fs include kernel nr_bisected scripts source usr
> > 
> > 
> > vim +/folio +979 fs/netfs/read_helper.c
> > 
> >    947	
> >    948		ret = netfs_rreq_add_folios_to_buffer(rreq, want_index, have_index - 1,
> >    949						      gfp_mask);
> >    950		if (ret < 0)
> >    951			return ret;
> >    952		have_folios += have_index - want_index;
> >    953	
> >    954		ret = netfs_rreq_add_folios_to_buffer(rreq, have_index + have_folios,
> >    955						      want_index + want_folios - 1,
> >    956						      gfp_mask);
> >    957		if (ret < 0)
> >    958			return ret;
> >    959	
> >    960		/* Transfer the folios proposed by the VM into the buffer and take refs
> >    961		 * on them.  The locks will be dropped in netfs_rreq_unlock().
> >    962		 */
> >    963		if (ractl) {
> >    964			while ((folio = readahead_folio(ractl))) {
> >    965				folio_get(folio);
> >    966				if (folio == keep)
> >    967					folio_get(folio);
> >    968				ret = xa_insert_set_mark(&rreq->buffer,
> >    969							 folio_index(folio), folio,
> >    970							 XA_MARK_0, gfp_mask);
> >    971				if (ret < 0) {
> >    972					if (folio != keep)
> >    973						folio_unlock(folio);
> >    974					folio_put(folio);
> >    975					return ret;
> >    976				}
> >    977			}
> >    978		} else {
> >  > 979			folio_get(folio);
> >    980			ret = xa_insert_set_mark(&rreq->buffer, keep->index, keep,
> >    981						 XA_MARK_0, gfp_mask);
> >    982			if (ret < 0) {
> >    983				folio_put(folio);
> >    984				return ret;
> >    985			}
> >    986		}
> >    987		return 0;
> >    988	}
> >    989	
> > 
> > ---
> > 0-DAY CI Kernel Test Service, Intel Corporation
> > https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
> 
> 

^ permalink raw reply	[flat|nested] 3+ messages in thread
end of thread, other threads:[~2021-08-20  1:46 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2021-08-19 19:07 [dhowells-fs:netfs-folio-regions 11/28] fs/netfs/read_helper.c:979:13: warning: variable 'folio' is uninitialized when used here kernel test robot
2021-08-19 19:59 ` Nathan Chancellor
2021-08-20  1:36   ` Philip Li

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