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gh-69214: Fix fcntl.ioctl() request type (#119498)

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Use an 'unsigned long' instead of an 'unsigned int' for the request
parameter of fcntl.ioctl() to support requests larger than UINT_MAX.
This commit is contained in:
Victor Stinner 2024-05-24 14:31:40 +02:00 committed by GitHub
parent b48a3dbff4
commit 92fab3356f
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GPG Key ID: B5690EEEBB952194
3 changed files with 12 additions and 8 deletions
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3
Misc/NEWS.d/next/Library/2024-05-24-11-47-08.gh-issue-69214.Grl6zF.rst Normal file
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@ -0,0 +1,3 @@
Fix ``fcntl.ioctl()`` *request* parameter: use an ``unsigned long`` instead of
an ``unsigned int`` for the *request* parameter of :func:`fcntl.ioctl` to
support requests larger than ``UINT_MAX``. Patch by Victor Stinner.

11
Modules/clinic/fcntlmodule.c.h generated
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@ -96,7 +96,7 @@ PyDoc_STRVAR(fcntl_ioctl__doc__,
{"ioctl", (PyCFunction)(void(*)(void))fcntl_ioctl, METH_FASTCALL, fcntl_ioctl__doc__},
static PyObject *
fcntl_ioctl_impl(PyObject *module, int fd, unsigned int code,
fcntl_ioctl_impl(PyObject *module, int fd, unsigned long code,
PyObject *ob_arg, int mutate_arg);
static PyObject *
@ -104,7 +104,7 @@ fcntl_ioctl(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
{
PyObject *return_value = NULL;
int fd;
unsigned int code;
unsigned long code;
PyObject *ob_arg = NULL;
int mutate_arg = 1;
@ -120,10 +120,11 @@ fcntl_ioctl(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
if (fd < 0) {
goto exit;
}
code = (unsigned int)PyLong_AsUnsignedLongMask(args[1]);
if (code == (unsigned int)-1 && PyErr_Occurred()) {
if (!PyLong_Check(args[1])) {
PyErr_Format(PyExc_TypeError, "ioctl() argument 2 must be int, not %T", args[1]);
goto exit;
}
code = PyLong_AsUnsignedLongMask(args[1]);
if (nargs < 3) {
goto skip_optional;
}
@ -263,4 +264,4 @@ skip_optional:
exit:
return return_value;
}
/*[clinic end generated code: output=26793691ab1c75ba input=a9049054013a1b77]*/
/*[clinic end generated code: output=45a56f53fd17ff3c input=a9049054013a1b77]*/

6
Modules/fcntlmodule.c
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@ -112,7 +112,7 @@ fcntl_fcntl_impl(PyObject *module, int fd, int code, PyObject *arg)
fcntl.ioctl
fd: fildes
request as code: unsigned_int(bitwise=True)
request as code: unsigned_long(bitwise=True)
arg as ob_arg: object(c_default='NULL') = 0
mutate_flag as mutate_arg: bool = True
/
@ -148,9 +148,9 @@ code.
[clinic start generated code]*/
static PyObject *
fcntl_ioctl_impl(PyObject *module, int fd, unsigned int code,
fcntl_ioctl_impl(PyObject *module, int fd, unsigned long code,
PyObject *ob_arg, int mutate_arg)
/*[clinic end generated code: output=7f7f5840c65991be input=967b4a4cbeceb0a8]*/
/*[clinic end generated code: output=3d8eb6828666cea1 input=cee70f6a27311e58]*/
{
#define IOCTL_BUFSZ 1024
/* We use the unsigned non-checked 'I' format for the 'code' parameter