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Replace valid memory checks with new myfault class "exception handling", almost 

everywhere.  Leave some thread.cc stuff alone for now.
* cygtls.h: Kludge some definitions to avoid including a problematic windows
header.
(_cygtls::_myfault): New entry.
(_cygtls::_myfault_errno): Ditto.
(_cygtls::fault_guarded): New function.
(_cygtls::setup_fault): Ditto.
(_cygtls::return_from_fault): Ditto.
(_cygtls::clear_fault): Ditto.
(myfault): New class.
* exceptions.cc (handle_exceptions): Handle case of guarded fault in system
routine.
* gendef: Add another entry point for setjmp that the compiler doesn't know
about and won't complain about.
* gentls_offsets: Just include windows.h rather than kludging a HANDLE def.
* miscfuncs.cc (check_null_str): Delete.
(check_null_empty_str): Ditto.
(check_null_empty_str_errno): Ditto.
(check_null_str_errno): Ditto.
(__check_null_invalid_struct): Ditto.
(__check_null_invalid_struct_errno): Ditto.
(__check_invalid_read_ptr): Ditto.
(__check_invalid_read_ptr_errno): Ditto.
(dummytest): New function.
(check_iovec_for_read): Delete.
(chec_iovec): Rename from check_iovec_for_write.  Take a read/write parameter.
* tlsoffsets.h: Regenerate.
* winsup.h: Remove check_* declarations.
(check_iovec_for_read): Delete declaration.  Turn into a define instead.
(check_iovec_for_write): Ditto.
(check_iovec): New declaration.
* thread.h: Use ifdef guard name consistent with other header files.
This commit is contained in:
Christopher Faylor 2005-07-03 02:40:30 +00:00
parent 766bda7133
commit 893ac8e03c
32 changed files with 514 additions and 446 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,44 @@
2005-07-02 Christopher Faylor <cgf@timesys.com>
Replace valid memory checks with new myfault class "exception
handling", almost everywhere. Leave some thread.cc stuff alone for
now.
* cygtls.h: Kludge some definitions to avoid including a problematic
windows header.
(_cygtls::_myfault): New entry.
(_cygtls::_myfault_errno): Ditto.
(_cygtls::fault_guarded): New function.
(_cygtls::setup_fault): Ditto.
(_cygtls::return_from_fault): Ditto.
(_cygtls::clear_fault): Ditto.
(myfault): New class.
* exceptions.cc (handle_exceptions): Handle case of guarded fault in
system routine.
* gendef: Add another entry point for setjmp that the compiler doesn't
know about and won't complain about.
* gentls_offsets: Just include windows.h rather than kludging a HANDLE
def.
* miscfuncs.cc (check_null_str): Delete.
(check_null_empty_str): Ditto.
(check_null_empty_str_errno): Ditto.
(check_null_str_errno): Ditto.
(__check_null_invalid_struct): Ditto.
(__check_null_invalid_struct_errno): Ditto.
(__check_invalid_read_ptr): Ditto.
(__check_invalid_read_ptr_errno): Ditto.
(dummytest): New function.
(check_iovec_for_read): Delete.
(chec_iovec): Rename from check_iovec_for_write. Take a read/write
parameter.
* tlsoffsets.h: Regenerate.
* winsup.h: Remove check_* declarations.
(check_iovec_for_read): Delete declaration. Turn into a define
instead.
(check_iovec_for_write): Ditto.
(check_iovec): New declaration.
* thread.h: Use ifdef guard name consistent with other header files.
2005-07-02 Christopher Faylor <cgf@timesys.com>
* include/cygwin/version.h: Bump DLL minor number to 19.

3
winsup/cygwin/cygtls.cc
View File

@ -7,6 +7,9 @@ Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include "winsup.h"
#include <sys/time.h>
#define USE_SYS_TYPES_FD_SET
#include <winsock.h>
#include "thread.h"
#include "cygtls.h"
#include "assert.h"

76
winsup/cygwin/cygtls.h
View File

@ -16,8 +16,34 @@ details. */
#define _NOMNTENT_FUNCS
#include <mntent.h>
#undef _NOMNTENT_FUNCS
#define USE_SYS_TYPES_FD_SET
#include <winsock.h>
#include <setjmp.h>
#ifndef _WINSOCK_H
/* Stupid hack: Including winsock.h explicitly causes too many problems. */
struct sockaddr_in
{
short sin_family;
u_short sin_port;
struct in_addr
{
union
{
struct
{
u_char s_b1, s_b2, s_b3, s_b4;
} S_un_b;
struct
{
u_short s_w1, s_w2;
} S_un_w;
u_long S_addr;
} S_un;
};
struct in_addr sin_addr;
char sin_zero[8];
};
typedef unsigned int SOCKET;
#endif
#define CYGTLS_INITIALIZED 0x43227
#define CYGTLS_EXCEPTION (0x43227 + true)
@ -118,6 +144,12 @@ typedef struct struct_waitq
of the compiler used to generate tlsoffsets.h and the cygwin cross compiler.
*/
/*gentls_offsets*/
#include "cygerrno.h"
extern "C" int __sjfault (jmp_buf);
/*gentls_offsets*/
typedef __uint32_t __stack_t;
struct _cygtls
{
@ -142,6 +174,8 @@ struct _cygtls
};
struct _local_storage locals;
class cygthread *_ctinfo;
void *_myfault;
int _myfault_errno;
waitq wq;
struct _cygtls *prev, *next;
__stack_t *stackptr;
@ -172,7 +206,9 @@ struct _cygtls
struct sigaction& siga)
__attribute__((regparm(3)));
void init_threadlist_exceptions (struct _exception_list *);
#ifdef _THREAD_H
operator HANDLE () const {return tid->win32_obj_id;}
#endif
void set_siginfo (struct sigpacket *) __attribute__ ((regparm (3)));
void set_threadkill () {threadkill = true;}
void reset_threadkill () {threadkill = false;}
@ -182,6 +218,26 @@ struct _cygtls
void lock () __attribute__ ((regparm (1)));
void unlock () __attribute__ ((regparm (1)));
bool locked () __attribute__ ((regparm (1)));
void*& fault_guarded () {return _myfault;}
void return_from_fault ()
{
if (_myfault_errno)
set_errno (_myfault_errno);
longjmp ((int *) _myfault, 1);
}
int setup_fault (jmp_buf j, int myerrno) __attribute__ ((always_inline))
{
if (_myfault)
return 0;
_myfault = (void *) j;
_myfault_errno = myerrno;
return __sjfault (j);
}
void clear_fault (jmp_buf j) __attribute__ ((always_inline))
{
if (j == _myfault)
_myfault = NULL;
}
/*gentls_offsets*/
};
#pragma pack(pop)
@ -191,6 +247,22 @@ extern char *_tlstop __asm__ ("%fs:8");
#define _my_tls (((_cygtls *) _tlsbase)[-1])
extern _cygtls *_main_tls;
/*gentls_offsets*/
class myfault
{
jmp_buf buf;
public:
~myfault () __attribute__ ((always_inline))
{
_my_tls.clear_fault (buf);
}
inline int faulted (int myerrno = 0) __attribute__ ((always_inline))
{
return _my_tls.setup_fault (buf, myerrno);
}
};
/*gentls_offsets*/
#define __getreent() (&_my_tls.local_clib)
const int CYGTLS_PADSIZE = (((char *) _main_tls->padding) - ((char *) _main_tls));

19
winsup/cygwin/dir.cc
View File

@ -23,11 +23,13 @@ details. */
#include "fhandler.h"
#include "dtable.h"
#include "cygheap.h"
#include "cygtls.h"
extern "C" int
dirfd (DIR *dir)
{
if (check_null_invalid_struct_errno (dir))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
if (dir->__d_cookie != __DIRENT_COOKIE)
{
@ -67,7 +69,8 @@ opendir (const char *name)
extern "C" struct dirent *
readdir (DIR *dir)
{
if (check_null_invalid_struct_errno (dir))
myfault efault;
if (efault.faulted (EFAULT))
return NULL;
if (dir->__d_cookie != __DIRENT_COOKIE)
@ -141,7 +144,8 @@ readdir (DIR *dir)
extern "C" _off64_t
telldir64 (DIR *dir)
{
if (check_null_invalid_struct_errno (dir))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
if (dir->__d_cookie != __DIRENT_COOKIE)
@ -159,7 +163,8 @@ telldir (DIR *dir)
extern "C" void
seekdir64 (DIR *dir, _off64_t loc)
{
if (check_null_invalid_struct_errno (dir))
myfault efault;
if (efault.faulted (EFAULT))
return;
if (dir->__d_cookie != __DIRENT_COOKIE)
@ -179,7 +184,8 @@ seekdir (DIR *dir, _off_t loc)
extern "C" void
rewinddir (DIR *dir)
{
if (check_null_invalid_struct_errno (dir))
myfault efault;
if (efault.faulted (EFAULT))
return;
if (dir->__d_cookie != __DIRENT_COOKIE)
@ -192,7 +198,8 @@ rewinddir (DIR *dir)
extern "C" int
closedir (DIR *dir)
{
if (check_null_invalid_struct_errno (dir))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
if (dir->__d_cookie != __DIRENT_COOKIE)

40
winsup/cygwin/environ.cc
View File

@ -331,20 +331,18 @@ _addenv (const char *name, const char *value, int overwrite)
extern "C" int
putenv (char *str)
{
int res;
if ((res = check_null_empty_str (str)))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
if (*str)
{
if (res == ENOENT)
return 0;
set_errno (res);
return -1;
}
char *eq = strchr (str, '=');
if (eq)
return _addenv (str, eq + 1, -1);
char *eq = strchr (str, '=');
if (eq)
return _addenv (str, eq + 1, -1);
/* Remove str from the environment. */
unsetenv (str);
/* Remove str from the environment. */
unsetenv (str);
}
return 0;
}
@ -353,19 +351,11 @@ putenv (char *str)
extern "C" int
setenv (const char *name, const char *value, int overwrite)
{
int res;
if ((res = check_null_empty_str (value)) == EFAULT)
{
set_errno (res);
return -1;
}
if ((res = check_null_empty_str (name)))
{
if (res == ENOENT)
return 0;
set_errno (res);
return -1;
}
myfault efault;
if (efault.faulted (EFAULT))
return -1;
if (!*name)
return 0;
if (*value == '=')
value++;
return _addenv (name, value, !!overwrite);

19
winsup/cygwin/exceptions.cc
View File

@ -403,6 +403,7 @@ handle_exceptions (EXCEPTION_RECORD *e0, void *frame, CONTEXT *in0, void *)
{
static bool NO_COPY debugging;
static int NO_COPY recursed;
_cygtls& me = _my_tls;
if (debugging && ++debugging < 500000)
{
@ -520,11 +521,12 @@ handle_exceptions (EXCEPTION_RECORD *e0, void *frame, CONTEXT *in0, void *)
break;
}
if (!cygwin_finished_initializing
|| GetCurrentThreadId () == sigtid
|| (void *) global_sigs[si.si_signo].sa_handler == (void *) SIG_DFL
|| (void *) global_sigs[si.si_signo].sa_handler == (void *) SIG_IGN
|| (void *) global_sigs[si.si_signo].sa_handler == (void *) SIG_ERR)
if (!me.fault_guarded ()
&& (!cygwin_finished_initializing
|| GetCurrentThreadId () == sigtid
|| (void *) global_sigs[si.si_signo].sa_handler == (void *) SIG_DFL
|| (void *) global_sigs[si.si_signo].sa_handler == (void *) SIG_IGN
|| (void *) global_sigs[si.si_signo].sa_handler == (void *) SIG_ERR))
{
/* Print the exception to the console */
if (!myself->cygstarted)
@ -559,11 +561,14 @@ handle_exceptions (EXCEPTION_RECORD *e0, void *frame, CONTEXT *in0, void *)
RtlUnwind (frame, ret_here, e0, 0);
__asm__ volatile (".equ _ret_here,.");
if (me.fault_guarded ())
me.return_from_fault ();
si.si_addr = ebp;
si.si_code = SI_KERNEL;
si.si_errno = si.si_pid = si.si_uid = 0;
_my_tls.push ((__stack_t) ebp, true);
sig_send (NULL, si, &_my_tls); // Signal myself
me.push ((__stack_t) ebp, true);
sig_send (NULL, si, &me); // Signal myself
return 1;
}

3
winsup/cygwin/external.cc
View File

@ -199,7 +199,8 @@ cygwin_internal (cygwin_getinfo_types t, ...)
case CW_SET_CYGWIN_REGISTRY_NAME:
{
const char *cr = va_arg (arg, char *);
if (check_null_empty_str_errno (cr))
myfault efault;
if (efault.faulted (EFAULT) || !*cr)
return (DWORD) NULL;
cygheap->cygwin_regname = (char *) crealloc (cygheap->cygwin_regname,
strlen (cr) + 1);

10
winsup/cygwin/fhandler_socket.cc
View File

@ -35,6 +35,7 @@
#include "wininfo.h"
#include <unistd.h>
#include <sys/acl.h>
#include "cygtls.h"
#define ASYNC_MASK (FD_READ|FD_WRITE|FD_OOB|FD_ACCEPT|FD_CONNECT)
@ -1659,11 +1660,14 @@ fhandler_socket::getpeereid (pid_t *pid, __uid32_t *euid, __gid32_t *egid)
return -1;
}
if (!check_null_invalid_struct (pid))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
if (pid)
*pid = sec_peer_pid;
if (!check_null_invalid_struct (euid))
if (euid)
*euid = sec_peer_uid;
if (!check_null_invalid_struct (egid))
if (egid)
*egid = sec_peer_gid;
return 0;
}

21
winsup/cygwin/fhandler_tape.cc
View File

@ -10,6 +10,7 @@ Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include "winsup.h"
#include "cygtls.h"
#include <sys/termios.h>
#include <unistd.h>
#include <stdlib.h>
@ -967,10 +968,11 @@ mtinfo_drive::set_options (HANDLE mt, long options)
int
mtinfo_drive::ioctl (HANDLE mt, unsigned int cmd, void *buf)
{
myfault efault;
if (efault.faulted ())
return ERROR_NOACCESS;
if (cmd == MTIOCTOP)
{
if (__check_invalid_read_ptr (buf, sizeof (struct mtop)))
return ERROR_NOACCESS;
struct mtop *op = (struct mtop *) buf;
if (lasterr == ERROR_BUS_RESET)
{
@ -1115,18 +1117,9 @@ mtinfo_drive::ioctl (HANDLE mt, unsigned int cmd, void *buf)
}
}
else if (cmd == MTIOCGET)
{
if (__check_null_invalid_struct (buf, sizeof (struct mtget)))
return ERROR_NOACCESS;
get_status (mt, (struct mtget *) buf);
}
else if (cmd == MTIOCPOS)
{
if (__check_null_invalid_struct (buf, sizeof (struct mtpos)))
return ERROR_NOACCESS;
if (!get_pos (mt))
((struct mtpos *) buf)->mt_blkno = block;
}
get_status (mt, (struct mtget *) buf);
else if (cmd == MTIOCPOS && !get_pos (mt))
((struct mtpos *) buf)->mt_blkno = block;
return lasterr;
}

3
winsup/cygwin/gendef
View File

@ -271,8 +271,9 @@ EOF
sub longjmp {
return <<EOF;
.globl _setjmp
.globl _setjmp, ___sjfault
_setjmp:
___sjfault:
pushl %ebp
movl %esp,%ebp
pushl %edi

2
winsup/cygwin/gentls_offsets
View File

@ -41,7 +41,7 @@ print TMP <<EOF;
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
typedef void *HANDLE;
#include <windows.h>
$pre
$def
int

3
winsup/cygwin/libc/bsdlib.cc
View File

@ -248,7 +248,8 @@ getprogname (void)
extern "C" void
setprogname (const char *newprogname)
{
if (!check_null_str_errno (newprogname))
myfault efault;
if (!efault.faulted (EFAULT))
{
/* Per BSD man page, setprogname keeps a pointer to the last
path component of the argument. It does *not* copy the

126
winsup/cygwin/miscfuncs.cc
View File

@ -19,6 +19,7 @@ details. */
#include <winbase.h>
#include <winnls.h>
#include "cygthread.h"
#include "cygtls.h"
long tls_ix = -1;
@ -145,76 +146,6 @@ strcasestr (const char *searchee, const char *lookfor)
return NULL;
}
int __stdcall
check_null_str (const char *name)
{
if (name && !IsBadStringPtr (name, CYG_MAX_PATH))
return 0;
return EFAULT;
}
int __stdcall
check_null_empty_str (const char *name)
{
if (name && !IsBadStringPtr (name, CYG_MAX_PATH))
return !*name ? ENOENT : 0;
return EFAULT;
}
int __stdcall
check_null_empty_str_errno (const char *name)
{
int __err;
if ((__err = check_null_empty_str (name)))
set_errno (__err);
return __err;
}
int __stdcall
check_null_str_errno (const char *name)
{
int __err;
if ((__err = check_null_str (name)))
set_errno (__err);
return __err;
}
int __stdcall
__check_null_invalid_struct (void *s, unsigned sz)
{
if (s && !IsBadWritePtr (s, sz))
return 0;
return EFAULT;
}
int __stdcall
__check_null_invalid_struct_errno (void *s, unsigned sz)
{
int err;
if ((err = __check_null_invalid_struct (s, sz)))
set_errno (err);
return err;
}
int __stdcall
__check_invalid_read_ptr (const void *s, unsigned sz)
{
if (s && !IsBadReadPtr (s, sz))
return 0;
return EFAULT;
}
int __stdcall
__check_invalid_read_ptr_errno (const void *s, unsigned sz)
{
if (s && !IsBadReadPtr (s, sz))
return 0;
return set_errno (EFAULT);
}
int __stdcall
check_invalid_virtual_addr (const void *s, unsigned sz)
{
@ -228,43 +159,13 @@ check_invalid_virtual_addr (const void *s, unsigned sz)
return 0;
}
ssize_t
check_iovec_for_read (const struct iovec *iov, int iovcnt)
static char __attribute__ ((noinline))
dummytest (volatile char *p)
{
if (iovcnt <= 0 || iovcnt > IOV_MAX)
{
set_errno (EINVAL);
return -1;
}
if (__check_invalid_read_ptr_errno (iov, iovcnt * sizeof (*iov)))
return -1;
size_t tot = 0;
while (iovcnt != 0)
{
if (iov->iov_len > SSIZE_MAX || (tot += iov->iov_len) > SSIZE_MAX)
{
set_errno (EINVAL);
return -1;
}
if (iov->iov_len
&& __check_null_invalid_struct_errno (iov->iov_base, iov->iov_len))
return -1;
iov += 1;
iovcnt -= 1;
}
assert (tot <= SSIZE_MAX);
return (ssize_t) tot;
return *p;
}
ssize_t
check_iovec_for_write (const struct iovec *iov, int iovcnt)
check_iovec (const struct iovec *iov, int iovcnt, bool forwrite)
{
if (iovcnt <= 0 || iovcnt > IOV_MAX)
{
@ -272,7 +173,8 @@ check_iovec_for_write (const struct iovec *iov, int iovcnt)
return -1;
}
if (__check_invalid_read_ptr_errno (iov, iovcnt * sizeof (*iov)))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
size_t tot = 0;
@ -285,12 +187,16 @@ check_iovec_for_write (const struct iovec *iov, int iovcnt)
return -1;
}
if (iov->iov_len
&& __check_invalid_read_ptr_errno (iov->iov_base, iov->iov_len))
return -1;
volatile char *p = ((char *) iov->iov_base) + iov->iov_len - 1;
if (!iov->iov_len)
/* nothing to do */;
else if (!forwrite)
*p = dummytest (p);
else
(void) dummytest (p);
iov += 1;
iovcnt -= 1;
iov++;
iovcnt--;
}
assert (tot <= SSIZE_MAX);

25
winsup/cygwin/msg.cc
View File

@ -12,11 +12,11 @@ details. */
#include "cygerrno.h"
#include <signal.h>
#ifdef USE_SERVER
#include <sys/types.h>
#include <stdio.h>
#include <unistd.h>
#include "sigproc.h"
#include "cygtls.h"
#include "cygserver_ipc.h"
#include "cygserver_msg.h"
@ -100,31 +100,20 @@ msgctl (int msqid, int cmd, struct msqid_ds *buf)
#ifdef USE_SERVER
syscall_printf ("msgctl (msqid = %d, cmd = 0x%x, buf = %p)",
msqid, cmd, buf);
myfault efault;
if (efault.faulted (EFAULT))
return -1;
switch (cmd)
{
case IPC_STAT:
if (__check_null_invalid_struct_errno (buf, sizeof *buf))
return -1;
break;
case IPC_SET:
if (__check_invalid_read_ptr_errno (buf, sizeof *buf))
return -1;
break;
case IPC_RMID:
break;
case IPC_INFO:
/* msqid == 0: Request for msginfo struct. */
if (!msqid
&& __check_null_invalid_struct_errno (buf, sizeof (struct msginfo)))
return -1;
/* Otherwise, request msqid entries from internal msqid_ds array. */
if (msqid)
if (__check_null_invalid_struct_errno (buf, msqid * sizeof (struct msqid_ds)))
return -1;
break;
case MSG_INFO:
if (__check_null_invalid_struct_errno (buf, sizeof (struct msg_info)))
return -1;
break;
default:
syscall_printf ("-1 [%d] = msgctl ()", EINVAL);
@ -177,7 +166,8 @@ msgrcv (int msqid, void *msgp, size_t msgsz, long msgtyp, int msgflg)
syscall_printf ("msgrcv (msqid = %d, msgp = %p, msgsz = %d, "
"msgtyp = %d, msgflg = 0x%x)",
msqid, msgp, msgsz, msgtyp, msgflg);
if (__check_null_invalid_struct_errno (msgp, msgsz))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
client_request_msg request (msqid, msgp, msgsz, msgtyp, msgflg);
if (request.make_request () == -1 || request.rcvval () == -1)
@ -202,7 +192,8 @@ msgsnd (int msqid, const void *msgp, size_t msgsz, int msgflg)
#ifdef USE_SERVER
syscall_printf ("msgsnd (msqid = %d, msgp = %p, msgsz = %d, msgflg = 0x%x)",
msqid, msgp, msgsz, msgflg);
if (__check_invalid_read_ptr_errno (msgp, msgsz))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
client_request_msg request (msqid, msgp, msgsz, msgflg);
if (request.make_request () == -1 || request.retval () == -1)

119
winsup/cygwin/net.cc
View File

@ -134,7 +134,8 @@ cygwin_inet_ntoa (struct in_addr in)
extern "C" unsigned long
cygwin_inet_addr (const char *cp)
{
if (check_null_str_errno (cp))
myfault efault;
if (efault.faulted (EFAULT))
return INADDR_NONE;
unsigned long res = inet_addr (cp);
@ -147,7 +148,8 @@ cygwin_inet_addr (const char *cp)
extern "C" int
cygwin_inet_aton (const char *cp, struct in_addr *inp)
{
if (check_null_str_errno (cp) || check_null_invalid_struct_errno (inp))
myfault efault;
if (efault.faulted (EFAULT))
return 0;
unsigned long res = inet_addr (cp);
@ -165,7 +167,8 @@ extern "C" unsigned int WINAPI inet_network (const char *);
extern "C" unsigned int
cygwin_inet_network (const char *cp)
{
if (check_null_str_errno (cp))
myfault efault;
if (efault.faulted (EFAULT))
return INADDR_NONE;
unsigned int res = inet_network (cp);
@ -536,7 +539,8 @@ __dup_ent (unionent *&dst, unionent *src, struct_type type)
extern "C" struct protoent *
cygwin_getprotobyname (const char *p)
{
if (check_null_str_errno (p))
myfault efault;
if (efault.faulted (EFAULT))
return NULL;
return (protoent *) dup_ent (protoent_buf, getprotobyname (p), t_protoent);
}
@ -625,9 +629,8 @@ cygwin_sendto (int fd, const void *buf, int len, int flags,
fhandler_socket *fh = get (fd);
if ((len && __check_invalid_read_ptr_errno (buf, (unsigned) len))
|| (to && __check_invalid_read_ptr_errno (to, tolen))
|| !fh)
myfault efault;
if (efault.faulted (EFAULT) || !fh)
res = -1;
else if ((res = len) != 0)
res = fh->sendto (buf, len, flags, to, tolen);
@ -648,11 +651,8 @@ cygwin_recvfrom (int fd, void *buf, int len, int flags,
fhandler_socket *fh = get (fd);
if ((len && __check_null_invalid_struct_errno (buf, (unsigned) len))
|| (from
&& (check_null_invalid_struct_errno (fromlen)
|| __check_null_invalid_struct_errno (from, (unsigned) *fromlen)))
|| !fh)
myfault efault;
if (efault.faulted (EFAULT) || !fh)
res = -1;
else if ((res = len) != 0)
res = fh->recvfrom (buf, len, flags, from, fromlen);
@ -707,7 +707,8 @@ cygwin_setsockopt (int fd, int level, int optname, const void *optval,
break;
}
if ((optval && __check_invalid_read_ptr_errno (optval, optlen)) || !fh)
myfault efault;
if (efault.faulted (EFAULT) || !fh)
res = -1;
else
{
@ -771,10 +772,8 @@ cygwin_getsockopt (int fd, int level, int optname, void *optval, int *optlen)
name = "SO_PEERCRED";
}
if ((optval
&& (check_null_invalid_struct_errno (optlen)
|| __check_null_invalid_struct_errno (optval, (unsigned) *optlen)))
|| !fh)
myfault efault;
if (efault.faulted (EFAULT) || !fh)
res = -1;
else if (optname == SO_PEERCRED)
{
@ -822,7 +821,8 @@ cygwin_connect (int fd, const struct sockaddr *name, int namelen)
fhandler_socket *fh = get (fd);
if (__check_invalid_read_ptr_errno (name, namelen) || !fh)
myfault efault;
if (efault.faulted (EFAULT) || !fh)
res = -1;
else
{
@ -886,8 +886,8 @@ extern "C" struct servent *
cygwin_getservbyname (const char *name, const char *proto)
{
sig_dispatch_pending ();
if (check_null_str_errno (name)
|| (proto != NULL && check_null_str_errno (proto)))
myfault efault;
if (efault.faulted (EFAULT))
return NULL;
servent *res = (servent *) dup_ent (servent_buf, getservbyname (name, proto), t_servent);
@ -900,7 +900,8 @@ extern "C" struct servent *
cygwin_getservbyport (int port, const char *proto)
{
sig_dispatch_pending ();
if (proto != NULL && check_null_str_errno (proto))
myfault efault;
if (efault.faulted (EFAULT))
return NULL;
servent *res = (servent *) dup_ent (servent_buf, getservbyport (port, proto), t_servent);
@ -912,7 +913,8 @@ extern "C" int
cygwin_gethostname (char *name, size_t len)
{
sig_dispatch_pending ();
if (__check_null_invalid_struct_errno (name, len))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
if (gethostname (name, len))
@ -934,7 +936,8 @@ extern "C" struct hostent *
cygwin_gethostbyname (const char *name)
{
sig_dispatch_pending ();
if (check_null_str_errno (name))
myfault efault;
if (efault.faulted (EFAULT))
return NULL;
unsigned char tmp_addr[4];
@ -980,7 +983,8 @@ extern "C" struct hostent *
cygwin_gethostbyaddr (const char *addr, int len, int type)
{
sig_dispatch_pending ();
if (__check_invalid_read_ptr_errno (addr, len))
myfault efault;
if (efault.faulted (EFAULT))
return NULL;
hostent *res = (hostent *) dup_ent (hostent_buf, gethostbyaddr (addr, len, type), t_hostent);
@ -1000,9 +1004,8 @@ cygwin_accept (int fd, struct sockaddr *peer, int *len)
fhandler_socket *fh = get (fd);
if ((peer && (check_null_invalid_struct_errno (len)
|| __check_null_invalid_struct_errno (peer, (unsigned) *len)))
|| !fh)
myfault efault;
if (efault.faulted (EFAULT) || !fh)
res = -1;
else
{
@ -1031,7 +1034,8 @@ cygwin_bind (int fd, const struct sockaddr *my_addr, int addrlen)
sig_dispatch_pending ();
fhandler_socket *fh = get (fd);
if (__check_invalid_read_ptr_errno (my_addr, addrlen) || !fh)
myfault efault;
if (efault.faulted (EFAULT) || !fh)
res = -1;
else
res = fh->bind (my_addr, addrlen);
@ -1049,9 +1053,8 @@ cygwin_getsockname (int fd, struct sockaddr *addr, int *namelen)
fhandler_socket *fh = get (fd);
if (check_null_invalid_struct_errno (namelen)
|| __check_null_invalid_struct_errno (addr, (unsigned) *namelen)
|| !fh)
myfault efault;
if (efault.faulted (EFAULT) || !fh)
res = -1;
else
res = fh->getsockname (addr, namelen);
@ -1112,7 +1115,8 @@ cygwin_hstrerror (int err)
extern "C" void
cygwin_herror (const char *s)
{
if (s && check_null_str (s))
myfault efault;
if (efault.faulted ())
return;
if (cygheap->fdtab.not_open (2))
return;
@ -1151,9 +1155,8 @@ cygwin_getpeername (int fd, struct sockaddr *name, int *len)
fhandler_socket *fh = get (fd);
if (check_null_invalid_struct_errno (len)
|| __check_null_invalid_struct_errno (name, (unsigned) *len)
|| !fh)
myfault efault;
if (efault.faulted (EFAULT) || !fh)
res = -1;
else
res = fh->getpeername (name, len);
@ -1188,7 +1191,8 @@ getdomainname (char *domain, size_t len)
* Punt for now and assume MS-TCP on Win95.
*/
sig_dispatch_pending ();
if (__check_null_invalid_struct_errno (domain, len))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
PFIXED_INFO info = NULL;
@ -1801,7 +1805,8 @@ get_ifconf (struct ifconf *ifc, int what)
struct sockaddr_in *sa;
sig_dispatch_pending ();
if (check_null_invalid_struct_errno (ifc))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
/* Union maps buffer to correct struct */
@ -1880,11 +1885,14 @@ cygwin_rcmd (char **ahost, unsigned short inport, char *locuser,
sig_dispatch_pending ();
if (check_null_invalid_struct_errno (ahost) ||
check_null_empty_str_errno (*ahost) ||
(locuser && check_null_empty_str_errno (locuser)) ||
(remuser && check_null_str_errno (remuser)))
myfault efault;
if (efault.faulted (EFAULT))
return (int) INVALID_SOCKET;
if (!*locuser)
{
set_errno (EINVAL);
return (int) INVALID_SOCKET;
}
res = rcmd (ahost, inport, locuser, remuser, cmd, fd2p ? &fd2s : NULL);
if (res != (int) INVALID_SOCKET)
@ -1932,7 +1940,8 @@ cygwin_rresvport (int *port)
int res;
sig_dispatch_pending ();
if (check_null_invalid_struct_errno (port))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
res = rresvport (port);
@ -1960,10 +1969,8 @@ cygwin_rexec (char **ahost, unsigned short inport, char *locuser,
SOCKET fd2s;
sig_dispatch_pending ();
if (check_null_invalid_struct_errno (ahost) ||
check_null_empty_str_errno (*ahost) ||
(locuser && check_null_empty_str_errno (locuser)) ||
(password && check_null_str_errno (password)))
myfault efault;
if (efault.faulted (EFAULT))
return (int) INVALID_SOCKET;
res = rexec (ahost, inport, locuser, password, cmd, fd2p ? &fd2s : NULL);
@ -2016,7 +2023,8 @@ socketpair (int family, int type, int protocol, int *sb)
int len;
sig_dispatch_pending ();
if (__check_null_invalid_struct_errno (sb, 2 * sizeof (int)))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
if (family != AF_LOCAL && family != AF_INET)
@ -2217,11 +2225,8 @@ cygwin_recvmsg (int fd, struct msghdr *msg, int flags)
fhandler_socket *fh = get (fd);
if (check_null_invalid_struct_errno (msg)
|| (msg->msg_name
&& __check_null_invalid_struct_errno (msg->msg_name,
(unsigned) msg->msg_namelen))
|| !fh)
myfault efault;
if (efault.faulted (EFAULT) || !fh)
res = -1;
else
{
@ -2243,11 +2248,8 @@ cygwin_sendmsg (int fd, const struct msghdr *msg, int flags)
fhandler_socket *fh = get (fd);
if (__check_invalid_read_ptr_errno (msg, sizeof msg)
|| (msg->msg_name
&& __check_invalid_read_ptr_errno (msg->msg_name,
(unsigned) msg->msg_namelen))
|| !fh)
myfault efault;
if (efault.faulted (EFAULT) || !fh)
res = -1;
else
{
@ -2287,7 +2289,8 @@ cygwin_inet_ntop (int family, const void *addrptr, char *strptr, size_t len)
{
const u_char *p = (const u_char *) addrptr;
if (__check_null_invalid_struct_errno (strptr, len))
myfault efault;
if (efault.faulted (EFAULT))
return NULL;
if (family == AF_INET)
{

69
winsup/cygwin/path.cc
View File

@ -542,6 +542,12 @@ path_conv::check (const char *src, unsigned opt,
}
#endif
myfault efault;
if (efault.faulted ())
{
error = EFAULT;
return;
}
int loop = 0;
path_flags = 0;
known_suffix = NULL;
@ -554,8 +560,12 @@ path_conv::check (const char *src, unsigned opt,
if (!(opt & PC_NULLEMPTY))
error = 0;
else if ((error = check_null_empty_str (src)))
return;
else if (!*src)
{
error = ENOENT;
return;
}
/* This loop handles symlink expansion. */
for (;;)
{
@ -2473,8 +2483,11 @@ mount (const char *win32_path, const char *posix_path, unsigned flags)
{
int res = -1;
if (check_null_empty_str_errno (posix_path))
myfault efault;
if (efault.faulted (EFAULT))
/* errno set */;
else if (!*posix_path || !*win32_path)
set_errno (EINVAL);
else if (strpbrk (posix_path, "\\:"))
set_errno (EINVAL);
else if (flags & MOUNT_CYGDRIVE) /* normal mount */
@ -2485,7 +2498,7 @@ mount (const char *win32_path, const char *posix_path, unsigned flags)
res = mount_table->write_cygdrive_info_to_registry (posix_path, flags);
win32_path = NULL;
}
else if (!check_null_empty_str_errno (win32_path))
else
res = mount_table->add_item (win32_path, posix_path, flags, true);
syscall_printf ("%d = mount (%s, %s, %p)", res, win32_path, posix_path, flags);
@ -2500,8 +2513,14 @@ mount (const char *win32_path, const char *posix_path, unsigned flags)
extern "C" int
umount (const char *path)
{
if (check_null_empty_str_errno (path))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
if (!*path)
{
set_errno (EINVAL);
return -1;
}
return cygwin_umount (path, 0);
}
@ -2619,9 +2638,14 @@ symlink_worker (const char *topath, const char *frompath, bool use_winsym,
/* POSIX says that empty 'frompath' is invalid input while empty
'topath' is valid -- it's symlink resolver job to verify if
symlink contents point to existing filesystem object */
if (check_null_empty_str_errno (topath) == EFAULT ||
check_null_empty_str_errno (frompath))
myfault efault;
if (efault.faulted (EFAULT))
goto done;
if (!*topath || !*frompath)
{
set_errno (EINVAL);
goto done;
}
if (strlen (topath) >= CYG_MAX_PATH)
{
@ -3424,9 +3448,12 @@ char *
getcwd (char *buf, size_t ulen)
{
char* res = NULL;
if (ulen == 0 && buf)
myfault efault;
if (efault.faulted (EFAULT))
/* errno set */;
else if (ulen == 0 && buf)
set_errno (EINVAL);
else if (buf == NULL || !__check_null_invalid_struct_errno (buf, ulen))
else
res = cygheap->cwd.get (buf, 1, 1, ulen);
return res;
}
@ -3442,8 +3469,14 @@ getwd (char *buf)
extern "C" int
chdir (const char *in_dir)
{
if (check_null_empty_str_errno (in_dir))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
if (!*in_dir)
{
set_errno (ENOENT);
return -1;
}
syscall_printf ("dir '%s'", in_dir);
@ -3566,16 +3599,28 @@ cygwin_conv_to_full_win32_path (const char *path, char *win32_path)
extern "C" int
cygwin_conv_to_posix_path (const char *path, char *posix_path)
{
if (check_null_empty_str_errno (path))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
if (!*path)
{
set_errno (ENOENT);
return -1;
}
return_with_errno (mount_table->conv_to_posix_path (path, posix_path, 1));
}
extern "C" int
cygwin_conv_to_full_posix_path (const char *path, char *posix_path)
{
if (check_null_empty_str_errno (path))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
if (!*path)
{
set_errno (ENOENT);
return -1;
}
return_with_errno (mount_table->conv_to_posix_path (path, posix_path, 0));
}

9
winsup/cygwin/pthread.cc
View File

@ -15,6 +15,7 @@
#include "cygerrno.h"
#include <stdarg.h>
#include <sys/fcntl.h>
#include "cygtls.h"
extern "C"
{
@ -165,8 +166,14 @@ sem_destroy (sem_t * sem)
static bool
mangle_sem_name (char *mangled, const char *name)
{
if (check_null_empty_str_errno (name))
myfault efault;
if (efault.faulted (EFAULT))
return false;
if (!*name)
{
set_errno (ENOENT);
return false;
}
int len = strlen (name);
if (len >= CYG_MAX_PATH
|| (wincap.has_terminal_services () && len >= CYG_MAX_PATH - 7))

7
winsup/cygwin/resource.cc
View File

@ -18,6 +18,7 @@ details. */
#include "cygerrno.h"
#include "pinfo.h"
#include "psapi.h"
#include "cygtls.h"
/* add timeval values */
static void
@ -113,7 +114,8 @@ getrlimit (int resource, struct rlimit *rlp)
{
MEMORY_BASIC_INFORMATION m;
if (check_null_invalid_struct_errno (rlp))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
rlp->rlim_cur = RLIM_INFINITY;
@ -157,7 +159,8 @@ getrlimit (int resource, struct rlimit *rlp)
extern "C" int
setrlimit (int resource, const struct rlimit *rlp)
{
if (__check_invalid_read_ptr_errno (rlp, sizeof (*rlp)))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
struct rlimit oldlimits;

1
winsup/cygwin/sec_helper.cc
View File

@ -16,7 +16,6 @@ details. */
#include <unistd.h>
#include <stdlib.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/acl.h>
#include <ctype.h>

11
winsup/cygwin/select.cc
View File

@ -166,19 +166,16 @@ pselect(int maxfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
struct timeval tv;
sigset_t oldset = myself->getsigmask ();
myfault efault;
if (efault.faulted (EFAULT))
return -1;
if (ts)
{
if (check_invalid_read_struct_errno (ts))
return -1;
tv.tv_sec = ts->tv_sec;
tv.tv_usec = ts->tv_nsec / 1000;
}
if (set)
{
if (check_invalid_read_struct_errno (set))
return -1;
set_signal_mask (*set);
}
set_signal_mask (*set);
int ret = cygwin_select (maxfds, readfds, writefds, exceptfds,
ts ? &tv : NULL);
if (set)

22
winsup/cygwin/sem.cc
View File

@ -21,6 +21,7 @@ details. */
#include "cygserver_ipc.h"
#include "cygserver_sem.h"
#include "cygtls.h"
/*
* client_request_sem Constructors
@ -93,22 +94,8 @@ semctl (int semid, int semnum, int cmd, ...)
}
syscall_printf ("semctl (semid = %d, semnum = %d, cmd = %d, arg.val = 0x%x)",
semid, semnum, cmd, arg.val);
if ((cmd == IPC_STAT || cmd == IPC_SET)
&& __check_null_invalid_struct_errno (arg.buf, sizeof (struct semid_ds)))
return -1;
if (cmd == IPC_INFO)
{
/* semid == 0: Request for seminfo struct. */
if (!semid
&& __check_null_invalid_struct_errno (arg.buf, sizeof (struct seminfo)))
return -1;
/* Otherwise, request semid entries from internal semid_ds array. */
if (semid)
if (__check_null_invalid_struct_errno (arg.buf, semid * sizeof (struct semid_ds)))
return -1;
}
if (cmd == SEM_INFO
&& __check_null_invalid_struct_errno (arg.buf, sizeof (struct sem_info)))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
client_request_sem request (semid, semnum, cmd, &arg);
if (request.make_request () == -1 || request.retval () == -1)
@ -156,7 +143,8 @@ semop (int semid, struct sembuf *sops, size_t nsops)
#ifdef USE_SERVER
syscall_printf ("semop (semid = %d, sops = %p, nsops = %d)",
semid, sops, nsops);
if (__check_null_invalid_struct_errno (sops, nsops * sizeof (struct sembuf)))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
client_request_sem request (semid, sops, nsops);
if (request.make_request () == -1 || request.retval () == -1)

26
winsup/cygwin/shm.cc
View File

@ -22,6 +22,7 @@ details. */
#include "cygserver_ipc.h"
#include "cygserver_shm.h"
#include "cygtls.h"
/*
* client_request_shm Constructors
@ -244,28 +245,9 @@ shmctl (int shmid, int cmd, struct shmid_ds *buf)
#ifdef USE_SERVER
syscall_printf ("shmctl (shmid = %d, cmd = %d, buf = 0x%x)",
shmid, cmd, buf);
switch (cmd)
{
case IPC_STAT:
case IPC_SET:
if (__check_null_invalid_struct_errno (buf, sizeof (struct shmid_ds)))
return -1;
break;
case IPC_INFO:
/* shmid == 0: Request for shminfo struct. */
if (!shmid
&& __check_null_invalid_struct_errno (buf, sizeof (struct shminfo)))
return -1;
/* Otherwise, request shmid entries from internal shmid_ds array. */
if (shmid)
if (__check_null_invalid_struct_errno (buf, shmid * sizeof (struct shmid_ds)))
return -1;
break;
case SHM_INFO:
if (__check_null_invalid_struct_errno (buf, sizeof (struct shm_info)))
return -1;
break;
}
myfault efault;
if (efault.faulted (EFAULT))
return -1;
client_request_shm request (shmid, cmd, buf);
if (request.make_request () == -1 || request.retval () == -1)
{

12
winsup/cygwin/signal.cc
View File

@ -147,17 +147,15 @@ handle_sigprocmask (int how, const sigset_t *set, sigset_t *oldset, sigset_t& op
return -1;
}
myfault efault;
if (efault.faulted (EFAULT))
return -1;
if (oldset)
{
if (check_null_invalid_struct_errno (oldset))
return -1;
*oldset = opmask;
}
*oldset = opmask;
if (set)
{
if (check_invalid_read_struct_errno (set))
return -1;
sigset_t newmask = opmask;
switch (how)
{

95
winsup/cygwin/syscalls.cc
View File

@ -550,7 +550,12 @@ open (const char *unix_path, int flags, ...)
sig_dispatch_pending ();
syscall_printf ("open (%s, %p)", unix_path, flags);
if (!check_null_empty_str_errno (unix_path))
myfault efault;
if (efault.faulted (EFAULT))
/* errno already set */;
else if (!*unix_path)
set_errno (ENOENT);
else
{
/* check for optional mode argument */
va_start (ap, flags);
@ -1008,7 +1013,8 @@ stat_worker (const char *name, struct __stat64 *buf, int nofollow)
int res = -1;
fhandler_base *fh = NULL;
if (check_null_invalid_struct_errno (buf))
myfault efault;
if (efault.faulted (EFAULT))
goto error;
if (!(fh = build_fh_name (name, NULL, nofollow ? PC_SYM_NOFOLLOW : PC_SYM_FOLLOW,
@ -1299,13 +1305,14 @@ system (const char *cmdstring)
{
pthread_testcancel ();
if (check_null_empty_str_errno (cmdstring))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
int res;
const char* command[4];
if (cmdstring == (const char *) NULL)
if (cmdstring == NULL)
return 1;
command[0] = "sh";
@ -1437,11 +1444,17 @@ fpathconf (int fd, int v)
extern "C" long int
pathconf (const char *file, int v)
{
myfault efault;
if (efault.faulted (EFAULT))
return -1;
if (!*file)
{
set_errno (ENOENT);
return -1;
}
switch (v)
{
case _PC_PATH_MAX:
if (check_null_empty_str_errno (file))
return -1;
return PATH_MAX - strlen (file);
case _PC_NAME_MAX:
return PATH_MAX;
@ -1483,8 +1496,9 @@ extern "C" int
ttyname_r (int fd, char *buf, size_t buflen)
{
int ret = 0;
if (__check_null_invalid_struct (buf, buflen))
ret = EINVAL;
myfault efault;
if (efault.faulted ())
ret = EFAULT;
else
{
cygheap_fdget cfd (fd, true);
@ -1713,9 +1727,14 @@ statvfs (const char *fname, struct statvfs *sfs)
int ret = -1;
char root[CYG_MAX_PATH];
if (check_null_empty_str_errno (fname)
|| check_null_invalid_struct_errno (sfs))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
if (!*fname)
{
set_errno (ENOENT);
return -1;
}
syscall_printf ("statfs %s", fname);
@ -1798,7 +1817,8 @@ fstatvfs (int fd, struct statvfs *sfs)
extern "C" int
statfs (const char *fname, struct statfs *sfs)
{
if (check_null_invalid_struct_errno (sfs))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
struct statvfs vfs;
int ret = statvfs (fname, &vfs);
@ -1837,33 +1857,27 @@ setpgid (pid_t pid, pid_t pgid)
pgid = pid;
if (pgid < 0)
{
set_errno (EINVAL);
goto out;
}
set_errno (EINVAL);
else
{
pinfo p (pid, PID_MAP_RW);
if (!p)
{
set_errno (ESRCH);
goto out;
}
set_errno (ESRCH);
else if (p->pgid == pgid)
res = 0;
/* A process may only change the process group of itself and its children */
if (p == myself || p->ppid == myself->pid)
else if (p != myself && p->ppid != myself->pid)
set_errno (EPERM);
else
{
p->pgid = pgid;
if (p->pid != p->pgid)
p->set_has_pgid_children (0);
res = 0;
}
else
{
set_errno (EPERM);
goto out;
// init_console_handler (FALSE);
}
}
out:
syscall_printf ("pid %d, pgid %d, res %d", pid, pgid, res);
return res;
}
@ -1924,8 +1938,14 @@ mknod_worker (const char *path, mode_t type, mode_t mode, _major_t major,
extern "C" int
mknod32 (const char *path, mode_t mode, __dev32_t dev)
{
if (check_null_empty_str_errno (path))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
if (!*path)
{
set_errno (ENOENT);
return -1;
}
if (strlen (path) >= CYG_MAX_PATH)
return -1;
@ -2627,7 +2647,8 @@ endutent ()
extern "C" void
utmpname (const char *file)
{
if (check_null_empty_str (file))
myfault efault;
if (efault.faulted () || !*file)
{
debug_printf ("Invalid file");
return;
@ -2678,7 +2699,8 @@ getutent ()
extern "C" struct utmp *
getutid (struct utmp *id)
{
if (check_null_invalid_struct_errno (id))
myfault efault;
if (efault.faulted (EFAULT))
return NULL;
if (utmp_fd < 0)
{
@ -2716,7 +2738,8 @@ getutid (struct utmp *id)
extern "C" struct utmp *
getutline (struct utmp *line)
{
if (check_null_invalid_struct_errno (line))
myfault efault;
if (efault.faulted (EFAULT))
return NULL;
if (utmp_fd < 0)
{
@ -2738,7 +2761,8 @@ getutline (struct utmp *line)
extern "C" struct utmp *
pututline (struct utmp *ut)
{
if (check_null_invalid_struct (ut))
myfault efault;
if (efault.faulted (EFAULT))
return NULL;
internal_setutent (true);
if (utmp_fd < 0)
@ -2786,7 +2810,8 @@ getutxid (const struct utmpx *id)
{
static struct utmpx utx;
if (__check_invalid_read_ptr (id, sizeof *id))
myfault efault;
if (efault.faulted (EFAULT))
return NULL;
((struct utmpx *)id)->ut_time = id->ut_tv.tv_sec;
return copy_ut_to_utx (getutid ((struct utmp *) id), &utx);
@ -2797,7 +2822,8 @@ getutxline (const struct utmpx *line)
{
static struct utmpx utx;
if (__check_invalid_read_ptr (line, sizeof *line))
myfault efault;
if (efault.faulted (EFAULT))
return NULL;
((struct utmpx *)line)->ut_time = line->ut_tv.tv_sec;
return copy_ut_to_utx (getutline ((struct utmp *) line), &utx);
@ -2808,7 +2834,8 @@ pututxline (const struct utmpx *utmpx)
{
static struct utmpx utx;
if (__check_invalid_read_ptr (utmpx, sizeof *utmpx))
myfault efault;
if (efault.faulted (EFAULT))
return NULL;
((struct utmpx *)utmpx)->ut_time = utmpx->ut_tv.tv_sec;
return copy_ut_to_utx (pututline ((struct utmp *) utmpx), &utx);

8
winsup/cygwin/thread.cc
View File

@ -1771,7 +1771,8 @@ semaphore::_timedwait (const struct timespec *abstime)
struct timeval tv;
long waitlength;
if (__check_invalid_read_ptr (abstime, sizeof *abstime))
myfault efault;
if (efault.faulted ())
{
/* According to SUSv3, abstime need not be checked for validity,
if the semaphore can be locked immediately. */
@ -3233,9 +3234,8 @@ semaphore::post (sem_t *sem)
int
semaphore::getvalue (sem_t *sem, int *sval)
{
if (!is_good_object (sem)
|| __check_null_invalid_struct (sval, sizeof (int)))
myfault efault;
if (efault.faulted () || !is_good_object (sem))
{
set_errno (EINVAL);
return -1;

6
winsup/cygwin/thread.h
View File

@ -11,8 +11,8 @@ This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#ifndef _CYGNUS_THREADS_
#define _CYGNUS_THREADS_
#ifndef _THREAD_H
#define _THREAD_H
#define LOCK_MMAP_LIST 1
@ -707,4 +707,4 @@ struct MTinterface
};
#define MT_INTERFACE user_data->threadinterface
#endif // _CYGNUS_THREADS_
#endif // _THREAD_H

28
winsup/cygwin/timer.cc
View File

@ -216,10 +216,10 @@ timer_tracker::settime (int in_flags, const itimerspec *value, itimerspec *ovalu
return -1;
}
if (__check_invalid_read_ptr_errno (value, sizeof (*value))
myfault efault;
if (efault.faulted (EFAULT)
|| it_bad (value->it_value)
|| it_bad (value->it_interval)
|| (ovalue && check_null_invalid_struct_errno (ovalue)))
|| it_bad (value->it_interval))
return -1;
long long now = in_flags & TIMER_ABSTIME ? 0 : gtod.usecs (false);
@ -271,11 +271,12 @@ timer_tracker::gettime (itimerspec *ovalue)
extern "C" int
timer_gettime (timer_t timerid, struct itimerspec *ovalue)
{
if (check_null_invalid_struct_errno (ovalue))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
timer_tracker *tt = (timer_tracker *) timerid;
if (check_null_invalid_struct (tt) || tt->magic != TT_MAGIC)
if (tt->magic != TT_MAGIC)
{
set_errno (EINVAL);
return -1;
@ -288,8 +289,8 @@ timer_gettime (timer_t timerid, struct itimerspec *ovalue)
extern "C" int
timer_create (clockid_t clock_id, struct sigevent *evp, timer_t *timerid)
{
if (evp && check_null_invalid_struct_errno (evp)
|| check_null_invalid_struct_errno (timerid))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
if (clock_id != CLOCK_REALTIME)
{
@ -306,7 +307,10 @@ timer_settime (timer_t timerid, int flags, const struct itimerspec *value,
struct itimerspec *ovalue)
{
timer_tracker *tt = (timer_tracker *) timerid;
if (check_null_invalid_struct (tt) || tt->magic != TT_MAGIC)
myfault efault;
if (efault.faulted (EFAULT))
return -1;
if (tt->magic != TT_MAGIC)
{
set_errno (EINVAL);
return -1;
@ -319,7 +323,10 @@ extern "C" int
timer_delete (timer_t timerid)
{
timer_tracker *in_tt = (timer_tracker *) timerid;
if (check_null_invalid_struct (in_tt) || in_tt->magic != TT_MAGIC)
myfault efault;
if (efault.faulted (EFAULT))
return -1;
if (in_tt->magic != TT_MAGIC)
{
set_errno (EINVAL);
return -1;
@ -386,7 +393,8 @@ getitimer (int which, struct itimerval *ovalue)
set_errno (EINVAL);
return -1;
}
if (check_null_invalid_struct_errno (ovalue))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
struct itimerspec spec_ovalue;
int ret = timer_gettime ((timer_t) &ttstart, &spec_ovalue);

3
winsup/cygwin/times.cc
View File

@ -53,7 +53,8 @@ times (struct tms *buf)
{
FILETIME creation_time, exit_time, kernel_time, user_time;
if (check_null_invalid_struct_errno (buf))
myfault efault;
if (efault.faulted (EFAULT))
return ((clock_t) -1);
DWORD ticks = GetTickCount ();

122
winsup/cygwin/tlsoffsets.h
View File

@ -1,117 +1,125 @@
//;# autogenerated: Do not edit.
//; $tls::sizeof__cygtls = 3972;
//; $tls::func = -3972;
//; $tls::sizeof__cygtls = 3980;
//; $tls::func = -3980;
//; $tls::pfunc = 0;
//; $tls::saved_errno = -3968;
//; $tls::saved_errno = -3976;
//; $tls::psaved_errno = 4;
//; $tls::sa_flags = -3964;
//; $tls::sa_flags = -3972;
//; $tls::psa_flags = 8;
//; $tls::oldmask = -3960;
//; $tls::oldmask = -3968;
//; $tls::poldmask = 12;
//; $tls::deltamask = -3956;
//; $tls::deltamask = -3964;
//; $tls::pdeltamask = 16;
//; $tls::event = -3952;
//; $tls::event = -3960;
//; $tls::pevent = 20;
//; $tls::errno_addr = -3948;
//; $tls::errno_addr = -3956;
//; $tls::perrno_addr = 24;
//; $tls::initialized = -3944;
//; $tls::initialized = -3952;
//; $tls::pinitialized = 28;
//; $tls::sigmask = -3940;
//; $tls::sigmask = -3948;
//; $tls::psigmask = 32;
//; $tls::sigwait_mask = -3936;
//; $tls::sigwait_mask = -3944;
//; $tls::psigwait_mask = 36;
//; $tls::sigwait_info = -3932;
//; $tls::sigwait_info = -3940;
//; $tls::psigwait_info = 40;
//; $tls::threadkill = -3928;
//; $tls::threadkill = -3936;
//; $tls::pthreadkill = 44;
//; $tls::infodata = -3924;
//; $tls::infodata = -3932;
//; $tls::pinfodata = 48;
//; $tls::tid = -3776;
//; $tls::tid = -3784;
//; $tls::ptid = 196;
//; $tls::local_clib = -3772;
//; $tls::local_clib = -3780;
//; $tls::plocal_clib = 200;
//; $tls::__dontuse = -3772;
//; $tls::__dontuse = -3780;
//; $tls::p__dontuse = 200;
//; $tls::locals = -2708;
//; $tls::locals = -2716;
//; $tls::plocals = 1264;
//; $tls::_ctinfo = -1084;
//; $tls::_ctinfo = -1092;
//; $tls::p_ctinfo = 2888;
//; $tls::_myfault = -1088;
//; $tls::p_myfault = 2892;
//; $tls::_myfault_errno = -1084;
//; $tls::p_myfault_errno = 2896;
//; $tls::wq = -1080;
//; $tls::pwq = 2892;
//; $tls::pwq = 2900;
//; $tls::prev = -1052;
//; $tls::pprev = 2920;
//; $tls::pprev = 2928;
//; $tls::next = -1048;
//; $tls::pnext = 2924;
//; $tls::pnext = 2932;
//; $tls::stackptr = -1044;
//; $tls::pstackptr = 2928;
//; $tls::pstackptr = 2936;
//; $tls::sig = -1040;
//; $tls::psig = 2932;
//; $tls::psig = 2940;
//; $tls::incyg = -1036;
//; $tls::pincyg = 2936;
//; $tls::pincyg = 2944;
//; $tls::spinning = -1032;
//; $tls::pspinning = 2940;
//; $tls::pspinning = 2948;
//; $tls::stacklock = -1028;
//; $tls::pstacklock = 2944;
//; $tls::pstacklock = 2952;
//; $tls::stack = -1024;
//; $tls::pstack = 2948;
//; $tls::pstack = 2956;
//; $tls::padding = 0;
//; $tls::ppadding = 3972;
//; $tls::ppadding = 3980;
//; __DATA__
#define tls_func (-3972)
#define tls_func (-3980)
#define tls_pfunc (0)
#define tls_saved_errno (-3968)
#define tls_saved_errno (-3976)
#define tls_psaved_errno (4)
#define tls_sa_flags (-3964)
#define tls_sa_flags (-3972)
#define tls_psa_flags (8)
#define tls_oldmask (-3960)
#define tls_oldmask (-3968)
#define tls_poldmask (12)
#define tls_deltamask (-3956)
#define tls_deltamask (-3964)
#define tls_pdeltamask (16)
#define tls_event (-3952)
#define tls_event (-3960)
#define tls_pevent (20)
#define tls_errno_addr (-3948)
#define tls_errno_addr (-3956)
#define tls_perrno_addr (24)
#define tls_initialized (-3944)
#define tls_initialized (-3952)
#define tls_pinitialized (28)
#define tls_sigmask (-3940)
#define tls_sigmask (-3948)
#define tls_psigmask (32)
#define tls_sigwait_mask (-3936)
#define tls_sigwait_mask (-3944)
#define tls_psigwait_mask (36)
#define tls_sigwait_info (-3932)
#define tls_sigwait_info (-3940)
#define tls_psigwait_info (40)
#define tls_threadkill (-3928)
#define tls_threadkill (-3936)
#define tls_pthreadkill (44)
#define tls_infodata (-3924)
#define tls_infodata (-3932)
#define tls_pinfodata (48)
#define tls_tid (-3776)
#define tls_tid (-3784)
#define tls_ptid (196)
#define tls_local_clib (-3772)
#define tls_local_clib (-3780)
#define tls_plocal_clib (200)
#define tls___dontuse (-3772)
#define tls___dontuse (-3780)
#define tls_p__dontuse (200)
#define tls_locals (-2708)
#define tls_locals (-2716)
#define tls_plocals (1264)
#define tls__ctinfo (-1084)
#define tls__ctinfo (-1092)
#define tls_p_ctinfo (2888)
#define tls__myfault (-1088)
#define tls_p_myfault (2892)
#define tls__myfault_errno (-1084)
#define tls_p_myfault_errno (2896)
#define tls_wq (-1080)
#define tls_pwq (2892)
#define tls_pwq (2900)
#define tls_prev (-1052)
#define tls_pprev (2920)
#define tls_pprev (2928)
#define tls_next (-1048)
#define tls_pnext (2924)
#define tls_pnext (2932)
#define tls_stackptr (-1044)
#define tls_pstackptr (2928)
#define tls_pstackptr (2936)
#define tls_sig (-1040)
#define tls_psig (2932)
#define tls_psig (2940)
#define tls_incyg (-1036)
#define tls_pincyg (2936)
#define tls_pincyg (2944)
#define tls_spinning (-1032)
#define tls_pspinning (2940)
#define tls_pspinning (2948)
#define tls_stacklock (-1028)
#define tls_pstacklock (2944)
#define tls_pstacklock (2952)
#define tls_stack (-1024)
#define tls_pstack (2948)
#define tls_pstack (2956)
#define tls_padding (0)
#define tls_ppadding (3972)
#define tls_ppadding (3980)

6
winsup/cygwin/uinfo.cc
View File

@ -169,9 +169,9 @@ getlogin_r (char *name, size_t namesize)
size_t len = strlen (login) + 1;
if (len > namesize)
return ERANGE;
int err = __check_null_invalid_struct (name, len);
if (err)
return err;
myfault efault;
if (efault.faulted ())
return EFAULT;
strncpy (name, login, len);
return 0;
}

4
winsup/cygwin/uname.cc
View File

@ -14,6 +14,7 @@ details. */
#include <stdio.h>
#include <sys/utsname.h>
#include "cygwin_version.h"
#include "cygtls.h"
/* uname: POSIX 4.4.1.1 */
extern "C" int
@ -21,7 +22,8 @@ uname (struct utsname *name)
{
SYSTEM_INFO sysinfo;
if (check_null_invalid_struct_errno (name))
myfault efault;
if (efault.faulted (EFAULT))
return -1;
char *snp = strstr (cygwin_version.dll_build_date, "SNP");

21
winsup/cygwin/winsup.h
View File

@ -266,26 +266,11 @@ void __stdcall set_console_title (char *);
void init_console_handler (BOOL);
void init_global_security ();
int __stdcall check_null_str (const char *name) __attribute__ ((regparm(1)));
int __stdcall check_null_empty_str (const char *name) __attribute__ ((regparm(1)));
int __stdcall check_null_empty_str_errno (const char *name) __attribute__ ((regparm(1)));
int __stdcall check_null_str_errno (const char *name) __attribute__ ((regparm(1)));
int __stdcall __check_null_invalid_struct (void *s, unsigned sz) __attribute__ ((regparm(2)));
int __stdcall __check_null_invalid_struct_errno (void *s, unsigned sz) __attribute__ ((regparm(2)));
int __stdcall __check_invalid_read_ptr (const void *s, unsigned sz) __attribute__ ((regparm(2)));
int __stdcall __check_invalid_read_ptr_errno (const void *s, unsigned sz) __attribute__ ((regparm(2)));
int __stdcall check_invalid_virtual_addr (const void *s, unsigned sz) __attribute__ ((regparm(2)));
#define check_null_invalid_struct(s) \
__check_null_invalid_struct ((s), sizeof (*(s)))
#define check_null_invalid_struct_errno(s) \
__check_null_invalid_struct_errno ((s), sizeof (*(s)))
#define check_invalid_read_struct_errno(s) \
__check_invalid_read_ptr_errno ((s), sizeof (*(s)))
struct iovec;
ssize_t check_iovec_for_read (const struct iovec *, int) __attribute__ ((regparm(2)));
ssize_t check_iovec_for_write (const struct iovec *, int) __attribute__ ((regparm(2)));
ssize_t check_iovec (const struct iovec *, int, bool) __attribute__ ((regparm(3)));
#define check_iovec_for_read(a, b) check_iovec ((a), (b), false)
#define check_iovec_for_write(a, b) check_iovec ((a), (b), true)
#define set_winsock_errno() __set_winsock_errno (__FUNCTION__, __LINE__)
void __set_winsock_errno (const char *fn, int ln) __attribute__ ((regparm(2)));