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Release buffer if function returns prematurely #4381

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merged 1 commit into from Mar 25, 2020
Merged

Release buffer if function returns prematurely #4381

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6 changes: 5 additions & 1 deletion src/map.c
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Expand Up @@ -355,17 +355,21 @@ PyImaging_MapBuffer(PyObject* self, PyObject* args)

if (view.len < 0) {
PyErr_SetString(PyExc_ValueError, "buffer has negative size");
PyBuffer_Release(&view);
return NULL;
}
if (offset + size > view.len) {
PyErr_SetString(PyExc_ValueError, "buffer is not large enough");
PyBuffer_Release(&view);
return NULL;
}

im = ImagingNewPrologueSubtype(
mode, xsize, ysize, sizeof(ImagingBufferInstance));
if (!im)
if (!im) {
PyBuffer_Release(&view);
return NULL;
}

/* setup file pointers */
if (ystep > 0)
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