diff options
Diffstat (limited to 'Python/compile.c')
| -rw-r--r-- | Python/compile.c | 32 |
1 files changed, 28 insertions, 4 deletions
diff --git a/Python/compile.c b/Python/compile.c index 6017b2ca43..942ca1f525 100644 --- a/Python/compile.c +++ b/Python/compile.c @@ -227,6 +227,10 @@ _Py_Mangle(PyObject *privateobj, PyObject *ident) return ident; /* Don't mangle if class is just underscores */ } plen = Py_UNICODE_strlen(p); + + assert(1 <= PY_SSIZE_T_MAX - nlen); + assert(1 + nlen <= PY_SSIZE_T_MAX - plen); + ident = PyUnicode_FromStringAndSize(NULL, 1 + nlen + plen); if (!ident) return 0; @@ -635,6 +639,12 @@ compiler_next_instr(struct compiler *c, basicblock *b) size_t oldsize, newsize; oldsize = b->b_ialloc * sizeof(struct instr); newsize = oldsize << 1; + + if (oldsize > (PY_SIZE_MAX >> 1)) { + PyErr_NoMemory(); + return -1; + } + if (newsize == 0) { PyErr_NoMemory(); return -1; @@ -3711,6 +3721,10 @@ assemble_init(struct assembler *a, int nblocks, int firstlineno) a->a_lnotab = PyBytes_FromStringAndSize(NULL, DEFAULT_LNOTAB_SIZE); if (!a->a_lnotab) return 0; + if (nblocks > PY_SIZE_MAX / sizeof(basicblock *)) { + PyErr_NoMemory(); + return 0; + } a->a_postorder = (basicblock **)PyObject_Malloc( sizeof(basicblock *) * nblocks); if (!a->a_postorder) { @@ -3819,10 +3833,14 @@ assemble_lnotab(struct assembler *a, struct instr *i) nbytes = a->a_lnotab_off + 2 * ncodes; len = PyBytes_GET_SIZE(a->a_lnotab); if (nbytes >= len) { - if (len * 2 < nbytes) + if ((len <= INT_MAX / 2) && (len * 2 < nbytes)) len = nbytes; - else + else if (len <= INT_MAX / 2) len *= 2; + else { + PyErr_NoMemory(); + return 0; + } if (_PyBytes_Resize(&a->a_lnotab, len) < 0) return 0; } @@ -3841,10 +3859,14 @@ assemble_lnotab(struct assembler *a, struct instr *i) nbytes = a->a_lnotab_off + 2 * ncodes; len = PyBytes_GET_SIZE(a->a_lnotab); if (nbytes >= len) { - if (len * 2 < nbytes) + if ((len <= INT_MAX / 2) && len * 2 < nbytes) len = nbytes; - else + else if (len <= INT_MAX / 2) len *= 2; + else { + PyErr_NoMemory(); + return 0; + } if (_PyBytes_Resize(&a->a_lnotab, len) < 0) return 0; } @@ -3903,6 +3925,8 @@ assemble_emit(struct assembler *a, struct instr *i) if (i->i_lineno && !assemble_lnotab(a, i)) return 0; if (a->a_offset + size >= len) { + if (len > PY_SSIZE_T_MAX / 2) + return 0; if (_PyBytes_Resize(&a->a_bytecode, len * 2) < 0) return 0; } |