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

Hello,

>> I don't intend to look into this issue myself but I'm happy to review 
>> a
>> patch if provided by a powerpc porter.

   I will look into this issue and provide you a patch for review as soon 
as possible.


> 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.


Thank you very much for finding the main cause. I will try to reproduce 
this issue and come with the better solution.


Thanks,
Trupti.