Re: [Pkg-utopia-maintainers] Bug#1115070: libbytesize ftbfs on powerpc architecture

On Sat, 2025-09-13 at 22:47 +0200, Michael Biebl wrote:
> I don't intend to look into this issue myself but I'm happy to review a 
> patch if provided by a powerpc porter.

Crash occurs while calling bs_size_convert() with "unit" containing invalid data:

Core was generated by `/usr/bin/python3 ./tests/libbytesize_unittest.py'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x0fae2cd0 in bs_size_convert_to (size=0x11a1aec0, unit=<error reading variable: Cannot access memory at address 0x1>, error=0xf77e1b50) at bs_size.c:663
663     char* bs_size_convert_to (const BSSize size, BSUnit unit, BSError **error) {
(gdb) bt
#0  0x0fae2cd0 in bs_size_convert_to (size=0x11a1aec0, unit=<error reading variable: Cannot access memory at address 0x1>, error=0xf77e1b50) at bs_size.c:663
#1  0x0fb96f7c in ffi_call_SYSV () at ../src/powerpc/sysv.S:104
#2  0x0fb95e7c in ffi_call_int (cif=cif@entry=0xffa43c90, fn=fn@entry=0xfae2ca0 <bs_size_convert_to>, rvalue=rvalue@entry=0xffa43bf0, avalue=avalue@entry=0xffa43bd0, closure=closure@entry=0x0)
    at ../src/powerpc/ffi.c:110
#3  0x0fb95fa0 in ffi_call (cif=cif@entry=0xffa43c90, fn=fn@entry=0xfae2ca0 <bs_size_convert_to>, rvalue=rvalue@entry=0xffa43bf0, avalue=avalue@entry=0xffa43bd0) at ../src/powerpc/ffi.c:140
#4  0x0fbd3918 in _call_function_pointer (st=0xf79b6be8, flags=<optimized out>, pProc=0xfae2ca0 <bs_size_convert_to>, avalues=0xffa43bd0, atypes=<optimized out>, restype=0x11bc83f8, resmem=<optimized
out>, argcount=3,
    argtypecount=<optimized out>) at ../Modules/_ctypes/callproc.c:950
#5  _ctypes_callproc (st=st@entry=0xf79b6be8, pProc=0xfae2ca0 <bs_size_convert_to>, argtuple=argtuple@entry=(<SizeStruct() at remote 0xf77e1c60>, 1, <_ctypes.CArgObject at remote 0xf77d2760>),
flags=<optimized out>,
    argtypes=<optimized out>,
    restype=<_ctypes.PyCSimpleType(__module__='ctypes', __firstlineno__=241, _type_='z', __repr__=<function at remote 0xf788bc58>, __static_attributes__=(), __dict__=<getset_descriptor at remote
0xf7894c28>, __weakref__=<getset_descriptor at remote 0xf7894c48>, __doc__=None, from_param=<classmethod_descriptor at remote 0xf7896c80>) at remote 0x11bc8218>, checker=0x0) at
../Modules/_ctypes/callproc.c:1301

Could be a bug in libffi.

Adrian

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