https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101476
Bug ID: 101476 Summary: AddressSanitizer check failed, points out a (potentially) non-existing stack error Product: gcc Version: 11.1.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: sanitizer Assignee: unassigned at gcc dot gnu.org Reporter: franek.balcerak at o2 dot pl CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org, jakub at gcc dot gnu.org, kcc at gcc dot gnu.org, marxin at gcc dot gnu.org Target Milestone: --- Created attachment 51167 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51167&action=edit the preprocessed file Is an issue with GCC 10.3 and GCC 11.1 C language x86_64-linux-gnu Ubuntu 11.1.0-1ubuntu1~21.04 Configured with: ../src/configure -v --with-pkgversion='Ubuntu 11.1.0-1ubuntu1~21.04' --with-bugurl=file:///usr/share/doc/gcc-11/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++,m2 --prefix=/usr --with-gcc-major-version-only --program-suffix=-11 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-bootstrap --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-plugin --enable-default-pie --with-system-zlib --enable-libphobos-checking=release --with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch --disable-werror --enable-cet --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none=/build/gcc-11-RPS7jb/gcc-11-11.1.0/debian/tmp-nvptx/usr,amdgcn-amdhsa=/build/gcc-11-RPS7jb/gcc-11-11.1.0/debian/tmp-gcn/usr --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu --with-build-config=bootstrap-lto-lean --enable-link-serialization=2 Command: gcc bug.i -o bug -fsanitize=address -pthread && ./bug Output: ==164550==AddressSanitizer CHECK failed: ../../../../src/libsanitizer/asan/asan_thread.cpp:367 "((ptr[0] == kCurrentStackFrameMagic)) != (0)" (0x0, 0x0) #0 0x7f649a4fdd68 in AsanCheckFailed ../../../../src/libsanitizer/asan/asan_rtl.cpp:74 #1 0x7f649a51e69e in __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) ../../../../src/libsanitizer/sanitizer_common/sanitizer_termination.cpp:78 #2 0x7f649a5034ec in __asan::AsanThread::GetStackFrameAccessByAddr(unsigned long, __asan::AsanThread::StackFrameAccess*) ../../../../src/libsanitizer/asan/asan_thread.cpp:367 #3 0x7f649a46deab in __asan::GetStackAddressInformation(unsigned long, unsigned long, __asan::StackAddressDescription*) ../../../../src/libsanitizer/asan/asan_descriptions.cpp:203 #4 0x7f649a46f2e8 in __asan::AddressDescription::AddressDescription(unsigned long, unsigned long, bool) ../../../../src/libsanitizer/asan/asan_descriptions.cpp:455 #5 0x7f649a46f2e8 in __asan::AddressDescription::AddressDescription(unsigned long, unsigned long, bool) ../../../../src/libsanitizer/asan/asan_descriptions.cpp:439 #6 0x7f649a471a94 in __asan::ErrorGeneric::ErrorGeneric(unsigned int, unsigned long, unsigned long, unsigned long, unsigned long, bool, unsigned long) ../../../../src/libsanitizer/asan/asan_errors.cpp:389 #7 0x7f649a4fd385 in __asan::ReportGenericError(unsigned long, unsigned long, unsigned long, unsigned long, bool, unsigned long, unsigned int, bool) ../../../../src/libsanitizer/asan/asan_report.cpp:476 #8 0x7f649a494038 in __interceptor_sigaltstack ../../../../src/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc:9996 #9 0x7f649a512bfd in __sanitizer::UnsetAlternateSignalStack() ../../../../src/libsanitizer/sanitizer_common/sanitizer_posix_libcdep.cpp:194 #10 0x7f649a5029ec in __asan::AsanThread::Destroy() ../../../../src/libsanitizer/asan/asan_thread.cpp:104 #11 0x7f649a426430 in __nptl_deallocate_tsd nptl/pthread_create.c:303 #12 0x7f649a427470 in __nptl_deallocate_tsd nptl/pthread_create.c:258 #13 0x7f649a427470 in start_thread nptl/pthread_create.c:484 #14 0x7f649a349d52 in clone (/lib/x86_64-linux-gnu/libc.so.6+0x117d52) .i file attached. Additional notes: does not trigger a segfault when not using a sanitizer. Removing the sanitizer and then adding the -fstack-protector-all flag does not crash the program. That makes me think it might not be a problem with the code.