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9d53457e59
Added checks for integer overflows, contributed by Google. Some are only available if asserts are left in the code, in cases where they can't be triggered from Python code.
64 lines
1.2 KiB
C
64 lines
1.2 KiB
C
#include "Python.h"
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#include "asdl.h"
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asdl_seq *
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asdl_seq_new(int size, PyArena *arena)
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{
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asdl_seq *seq = NULL;
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size_t n = (size ? (sizeof(void *) * (size - 1)) : 0);
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/* check size is sane */
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if (size < 0 || size == INT_MIN ||
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(size && ((size - 1) > (PY_SIZE_MAX / sizeof(void *))))) {
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PyErr_NoMemory();
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return NULL;
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}
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/* check if size can be added safely */
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if (n > PY_SIZE_MAX - sizeof(asdl_seq)) {
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PyErr_NoMemory();
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return NULL;
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}
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n += sizeof(asdl_seq);
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seq = (asdl_seq *)PyArena_Malloc(arena, n);
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if (!seq) {
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PyErr_NoMemory();
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return NULL;
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}
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memset(seq, 0, n);
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seq->size = size;
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return seq;
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}
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asdl_int_seq *
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asdl_int_seq_new(int size, PyArena *arena)
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{
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asdl_int_seq *seq = NULL;
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size_t n = (size ? (sizeof(void *) * (size - 1)) : 0);
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/* check size is sane */
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if (size < 0 || size == INT_MIN ||
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(size && ((size - 1) > (PY_SIZE_MAX / sizeof(void *))))) {
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PyErr_NoMemory();
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return NULL;
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}
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/* check if size can be added safely */
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if (n > PY_SIZE_MAX - sizeof(asdl_seq)) {
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PyErr_NoMemory();
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return NULL;
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}
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n += sizeof(asdl_seq);
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seq = (asdl_int_seq *)PyArena_Malloc(arena, n);
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if (!seq) {
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PyErr_NoMemory();
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return NULL;
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}
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memset(seq, 0, n);
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seq->size = size;
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return seq;
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}
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