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py/objint: Fix left-shift overflow in checking for large int.

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Damien George 2017-01-25 14:39:13 +11:00
parent b32a38e373
commit eaa77455c3
1 changed files with 1 additions and 1 deletions
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py/objint.c
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@ -383,7 +383,7 @@ STATIC mp_obj_t int_from_bytes(size_t n_args, const mp_obj_t *args) {
#if MICROPY_LONGINT_IMPL != MICROPY_LONGINT_IMPL_NONE #if MICROPY_LONGINT_IMPL != MICROPY_LONGINT_IMPL_NONE
// If result guaranteedly fits in small int, use that // If result guaranteedly fits in small int, use that
if (!MP_SMALL_INT_FITS(1 << (bufinfo.len * 8 - 1))) { if (bufinfo.len >= sizeof(mp_uint_t) || !MP_SMALL_INT_FITS(1 << (bufinfo.len * 8 - 1))) {
return mp_obj_int_from_bytes_impl(args[2] != MP_OBJ_NEW_QSTR(MP_QSTR_little), bufinfo.len, bufinfo.buf); return mp_obj_int_from_bytes_impl(args[2] != MP_OBJ_NEW_QSTR(MP_QSTR_little), bufinfo.len, bufinfo.buf);
} else } else
#endif #endif