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Issue #12287: Fix a stack corruption in ossaudiodev module when the FD is

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greater than FD_SETSIZE.
This commit is contained in:
Charles-François Natali 2011-08-28 18:10:27 +02:00
commit ac7e9e058d
6 changed files with 21 additions and 19 deletions
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12
Modules/socketmodule.c
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@ -485,18 +485,14 @@ static PyTypeObject sock_type;
#define SOCKLEN_T_LIMIT INT_MAX
#endif
#ifdef Py_SOCKET_FD_CAN_BE_GE_FD_SETSIZE
/* Platform can select file descriptors beyond FD_SETSIZE */
#define IS_SELECTABLE(s) 1
#elif defined(HAVE_POLL)
#ifdef HAVE_POLL
/* Instead of select(), we'll use poll() since poll() works on any fd. */
#define IS_SELECTABLE(s) 1
/* Can we call select() with this socket without a buffer overrun? */
#else
/* POSIX says selecting file descriptors beyond FD_SETSIZE
has undefined behaviour. If there's no timeout left, we don't have to
call select, so it's a safe, little white lie. */
#define IS_SELECTABLE(s) ((s)->sock_fd < FD_SETSIZE || s->sock_timeout <= 0.0)
/* If there's no timeout left, we don't have to call select, so it's a safe,
* little white lie. */
#define IS_SELECTABLE(s) (_PyIsSelectable_fd((s)->sock_fd) || (s)->sock_timeout <= 0.0)
#endif
static PyObject*