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Issue #28387: Fixed possible crash in _io.TextIOWrapper deallocator when

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the garbage collector is invoked in other thread.
Based on patch by Sebastian Cufre.
This commit is contained in:
Serhiy Storchaka 2016-11-03 15:38:58 +02:00
commit d63f1f757c
3 changed files with 10 additions and 12 deletions
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1
Misc/ACKS
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@ -321,6 +321,7 @@ Felipe Cruz
Drew Csillag Drew Csillag
Alessandro Cucci Alessandro Cucci
Joaquin Cuenca Abela Joaquin Cuenca Abela
Sebastian Cufre
John Cugini John Cugini
Tom Culliton Tom Culliton
Raúl Cumplido Raúl Cumplido

4
Misc/NEWS
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@ -106,6 +106,10 @@ Core and Builtins
Library Library
------- -------
- Issue #28387: Fixed possible crash in _io.TextIOWrapper deallocator when
the garbage collector is invoked in other thread. Based on patch by
Sebastian Cufre.
- Issue #27517: LZMA compressor and decompressor no longer raise exceptions if - Issue #27517: LZMA compressor and decompressor no longer raise exceptions if
given empty data twice. Patch by Benjamin Fogle. given empty data twice. Patch by Benjamin Fogle.

17
Modules/_io/textio.c
View file

@ -1103,7 +1103,7 @@ _io_TextIOWrapper___init___impl(textio *self, PyObject *buffer,
} }
static int static int
_textiowrapper_clear(textio *self) textiowrapper_clear(textio *self)
{ {
self->ok = 0; self->ok = 0;
Py_CLEAR(self->buffer); Py_CLEAR(self->buffer);
@ -1116,6 +1116,8 @@ _textiowrapper_clear(textio *self)
Py_CLEAR(self->snapshot); Py_CLEAR(self->snapshot);
Py_CLEAR(self->errors); Py_CLEAR(self->errors);
Py_CLEAR(self->raw); Py_CLEAR(self->raw);
Py_CLEAR(self->dict);
return 0; return 0;
} }
@ -1125,11 +1127,11 @@ textiowrapper_dealloc(textio *self)
self->finalizing = 1; self->finalizing = 1;
if (_PyIOBase_finalize((PyObject *) self) < 0) if (_PyIOBase_finalize((PyObject *) self) < 0)
return; return;
_textiowrapper_clear(self); self->ok = 0;
_PyObject_GC_UNTRACK(self); _PyObject_GC_UNTRACK(self);
if (self->weakreflist != NULL) if (self->weakreflist != NULL)
PyObject_ClearWeakRefs((PyObject *)self); PyObject_ClearWeakRefs((PyObject *)self);
Py_CLEAR(self->dict); textiowrapper_clear(self);
Py_TYPE(self)->tp_free((PyObject *)self); Py_TYPE(self)->tp_free((PyObject *)self);
} }
@ -1151,15 +1153,6 @@ textiowrapper_traverse(textio *self, visitproc visit, void *arg)
return 0; return 0;
} }
static int
textiowrapper_clear(textio *self)
{
if (_textiowrapper_clear(self) < 0)
return -1;
Py_CLEAR(self->dict);
return 0;
}
static PyObject * static PyObject *
textiowrapper_closed_get(textio *self, void *context); textiowrapper_closed_get(textio *self, void *context);