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Potential memory leak in Objects/bytesobject.c #101056

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Potential memory leak in Objects/bytesobject.c#101056
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type-bugAn unexpected behavior, bug, or error
@RuiliF

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@RuiliF
RuiliF
opened on Jan 15, 2023

Bug report

cpython/Objects/bytesobject.c

Lines 429 to 443 in 206f05a

p = PyOS_double_to_string(x, type, prec, dtoa_flags, NULL);
if (p == NULL)
return NULL;
len = strlen(p);
if (writer != NULL) {
str = _PyBytesWriter_Prepare(writer, str, len);
if (str == NULL)
return NULL;
memcpy(str, p, len);
PyMem_Free(p);
str += len;
return str;
}

At line 438, object p won't be freed if _PyBytesWriter_Prepare fails (returns NULL) and thus become a memory leak.

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