What do I do about a failed CHECK "((IsAligned(reinterpret_cast<uptr>(p), page_size_))) != (0)"?

[themightyoarfish]

same issue as #1468.

I don't have a minimal example, but a Qt program compiled on macos 15.1 (arm) with llvm 19.1.4 exhibits this problem on startup:

LeakSanitizer: bad pointer 0x00011f706480
LeakSanitizer: CHECK failed: sanitizer_allocator_secondary.h:177 "((IsAligned(reinterpret_cast<uptr>(p), page_size_))) != (0)" (0x0, 0x0) (tid=3366981)
Process 90392 stopped
* thread #2, stop reason = signal SIGABRT
    frame #0: 0x0000000182636600 libsystem_kernel.dylib`__pthread_kill + 8
libsystem_kernel.dylib`__pthread_kill:
->  0x182636600 <+8>:  b.lo   0x182636620    ; <+40>
    0x182636604 <+12>: pacibsp
    0x182636608 <+16>: stp    x29, x30, [sp, #-0x10]!
    0x18263660c <+20>: mov    x29, sp
Target 0: (myprogram) stopped.
(lldb) bt
* thread #2, stop reason = signal SIGABRT
  * frame #0: 0x0000000182636600 libsystem_kernel.dylib`__pthread_kill + 8
    frame #1: 0x000000018266ef70 libsystem_pthread.dylib`pthread_kill + 288
    frame #2: 0x000000018257b908 libsystem_c.dylib`abort + 128
    frame #3: 0x0000000105f01a0c libclang_rt.lsan_osx_dynamic.dylib`__sanitizer::Abort() + 80
    frame #4: 0x0000000105f0104c libclang_rt.lsan_osx_dynamic.dylib`__sanitizer::Die() + 104
    frame #5: 0x0000000105f01160 libclang_rt.lsan_osx_dynamic.dylib`__sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) + 152
    frame #6: 0x0000000105f0fe10 libclang_rt.lsan_osx_dynamic.dylib`__sanitizer::CombinedAllocator<__sanitizer::SizeClassAllocator64<__lsan::AP64<__sanitizer::LocalAddressSpaceView>>, __sanitizer::LargeMmapAllocatorPtrArrayDynamic>::GetMetaData(void const*) + 348
    frame #7: 0x0000000105f0e8c4 libclang_rt.lsan_osx_dynamic.dylib`__lsan::Deallocate(void*) + 36
    frame #8: 0x0000000182627e60 libc++abi.dylib`__cxa_decrement_exception_refcount + 124
    frame #9: 0x00000001858ca35c Security`Security::CodeSigning::SecStaticCode::staticValidateCore(unsigned int, Security::CodeSigning::SecRequirement const*) + 3064
    frame #10: 0x00000001858c881c Security`Security::CodeSigning::SecStaticCode::staticValidate(unsigned int, Security::CodeSigning::SecRequirement const*) + 308
    frame #11: 0x00000001858bd8a0 Security`SecStaticCodeCheckValidityWithErrors + 228
    frame #12: 0x0000000105aa4278 QtCore`void* std::__1::__thread_proxy[abi:ne180100]<std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct>>, (anonymous namespace)::SandboxChecker::SandboxChecker()::'lambda'()>>(void*) + 148
    frame #13: 0x0000000105f130d4 libclang_rt.lsan_osx_dynamic.dylib`void* ThreadStartFunc<false>(void*) + 100
    frame #14: 0x000000018266f2e4 libsystem_pthread.dylib`_pthread_start + 136

I'm not sure what to do about this.

[fmayer]

Is it possible that you are trying to free a pointer that you didn't get back from malloc (e.g. inside of the allocation that you got rather than the start)?

[themightyoarfish]

Its possible of course that apple's or Qt code is buggy, this problem appears before any of my own code gets executed.

[themightyoarfish]

This also happens when no Qt is involved, maybe this is just an llvm bug.