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gh-132075: Fix possible use of sockaddr structures with uninitialized members (GH-132076)

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Now all structure members are initialized with zeroes by default.
This commit is contained in:
Serhiy Storchaka 2025-04-04 17:09:58 +03:00 • committed by GitHub
parent 255eb375a7
commit 345baa77ba
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2 changed files with 15 additions and 0 deletions
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13
Modules/socketmodule.c
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@ -1820,6 +1820,7 @@ getsockaddrarg(PySocketSockObject *s, PyObject *args,
assert(path.len >= 0);
struct sockaddr_un* addr = &addrbuf->un;
memset(addr, 0, sizeof(struct sockaddr_un));
#ifdef __linux__
if (path.len == 0 || *(const char *)path.buf == 0) {
/* Linux abstract namespace extension:
@ -1863,6 +1864,7 @@ getsockaddrarg(PySocketSockObject *s, PyObject *args,
{
int pid, groups;
struct sockaddr_nl* addr = &addrbuf->nl;
memset(addr, 0, sizeof(struct sockaddr_nl));
if (!PyTuple_Check(args)) {
PyErr_Format(
PyExc_TypeError,
@ -1890,6 +1892,7 @@ getsockaddrarg(PySocketSockObject *s, PyObject *args,
{
unsigned int node, port;
struct sockaddr_qrtr* addr = &addrbuf->sq;
memset(addr, 0, sizeof(struct sockaddr_qrtr));
if (!PyTuple_Check(args)) {
PyErr_Format(
PyExc_TypeError,
@ -1969,6 +1972,7 @@ getsockaddrarg(PySocketSockObject *s, PyObject *args,
return 0;
}
struct sockaddr_in* addr = &addrbuf->in;
memset(addr, 0, sizeof(struct sockaddr_in));
result = setipaddr(s->state, host.buf, (struct sockaddr *)addr,
sizeof(*addr), AF_INET);
idna_cleanup(&host);
@ -2014,6 +2018,7 @@ getsockaddrarg(PySocketSockObject *s, PyObject *args,
return 0;
}
struct sockaddr_in6* addr = &addrbuf->in6;
memset(addr, 0, sizeof(struct sockaddr_in6));
result = setipaddr(s->state, host.buf, (struct sockaddr *)addr,
sizeof(*addr), AF_INET6);
idna_cleanup(&host);
@ -2078,6 +2083,7 @@ getsockaddrarg(PySocketSockObject *s, PyObject *args,
{
const char *straddr;
struct sockaddr_rc *addr = &addrbuf->bt_rc;
memset(addr, 0, sizeof(struct sockaddr_rc));
_BT_RC_MEMB(addr, family) = AF_BLUETOOTH;
#ifdef MS_WINDOWS
unsigned long channel;
@ -2104,6 +2110,7 @@ getsockaddrarg(PySocketSockObject *s, PyObject *args,
case BTPROTO_HCI:
{
struct sockaddr_hci *addr = &addrbuf->bt_hci;
memset(addr, 0, sizeof(struct sockaddr_hci));
#if defined(__NetBSD__) || defined(__DragonFly__)
const char *straddr;
_BT_HCI_MEMB(addr, family) = AF_BLUETOOTH;
@ -2155,6 +2162,7 @@ getsockaddrarg(PySocketSockObject *s, PyObject *args,
const char *straddr;
struct sockaddr_sco *addr = &addrbuf->bt_sco;
memset(addr, 0, sizeof(struct sockaddr_sco));
_BT_SCO_MEMB(addr, family) = AF_BLUETOOTH;
if (!PyBytes_Check(args)) {
PyErr_Format(PyExc_OSError,
@ -2232,6 +2240,7 @@ getsockaddrarg(PySocketSockObject *s, PyObject *args,
return 0;
}
struct sockaddr_ll* addr = &addrbuf->ll;
memset(addr, 0, sizeof(struct sockaddr_ll));
addr->sll_family = AF_PACKET;
addr->sll_protocol = htons((short)protoNumber);
addr->sll_ifindex = ifr.ifr_ifindex;
@ -2318,6 +2327,7 @@ getsockaddrarg(PySocketSockObject *s, PyObject *args,
struct ifreq ifr;
Py_ssize_t len;
struct sockaddr_can *addr = &addrbuf->can;
memset(addr, 0, sizeof(struct sockaddr_can));
if (!PyTuple_Check(args)) {
PyErr_Format(PyExc_TypeError,
@ -2370,6 +2380,7 @@ getsockaddrarg(PySocketSockObject *s, PyObject *args,
unsigned long int rx_id, tx_id;
struct sockaddr_can *addr = &addrbuf->can;
memset(addr, 0, sizeof(struct sockaddr_can));
if (!PyArg_ParseTuple(args, "O&kk", PyUnicode_FSConverter,
&interfaceName,
@ -2417,6 +2428,7 @@ getsockaddrarg(PySocketSockObject *s, PyObject *args,
uint8_t j1939_addr;
struct sockaddr_can *addr = &addrbuf->can;
memset(addr, 0, sizeof(struct sockaddr_can));
if (!PyArg_ParseTuple(args, "O&KIB", PyUnicode_FSConverter,
&interfaceName,
@ -2469,6 +2481,7 @@ getsockaddrarg(PySocketSockObject *s, PyObject *args,
case SYSPROTO_CONTROL:
{
struct sockaddr_ctl *addr = &addrbuf->ctl;
memset(addr, 0, sizeof(struct sockaddr_ctl));
addr->sc_family = AF_SYSTEM;
addr->ss_sysaddr = AF_SYS_CONTROL;