freebsd-src/contrib/tcpdump/machdep.c
Gleb Smirnoff 3340d77368 Update tcpdump to 4.9.0.
It fixes many buffer overflow in different protocol parsers, but none of
them are critical, even in absense of Capsicum.

Security:	CVE-2016-7922, CVE-2016-7923, CVE-2016-7924, CVE-2016-7925
Security:	CVE-2016-7926, CVE-2016-7927, CVE-2016-7928, CVE-2016-7929
Security:	CVE-2016-7930, CVE-2016-7931, CVE-2016-7932, CVE-2016-7933
Security:	CVE-2016-7934, CVE-2016-7935, CVE-2016-7936, CVE-2016-7937
Security:	CVE-2016-7938, CVE-2016-7939, CVE-2016-7940, CVE-2016-7973
Security:	CVE-2016-7974, CVE-2016-7975, CVE-2016-7983, CVE-2016-7984
Security:	CVE-2016-7985, CVE-2016-7986, CVE-2016-7992, CVE-2016-7993
Security:	CVE-2016-8574, CVE-2016-8575, CVE-2017-5202, CVE-2017-5203
Security:	CVE-2017-5204, CVE-2017-5205, CVE-2017-5341, CVE-2017-5342
Security:	CVE-2017-5482, CVE-2017-5483, CVE-2017-5484, CVE-2017-5485
Security:	CVE-2017-5486
2017-02-01 20:26:42 +00:00

75 lines
2.6 KiB
C

/*
* Copyright (c) 1996, 1997
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior
* written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
/*
* XXX - all we need, on platforms other than DEC OSF/1 (a/k/a Digital UNIX,
* a/k/a Tru64 UNIX), is "size_t", which is a standard C type; what do we
* need to do to get it defined? This is clearly wrong, as we shouldn't
* have to include UNIX or Windows system header files to get it.
*/
#include <netdissect-stdinc.h>
#ifndef HAVE___ATTRIBUTE__
#define __attribute__(x)
#endif /* HAVE___ATTRIBUTE__ */
#ifdef __osf__
#include <sys/sysinfo.h>
#include <sys/proc.h>
#if !defined(HAVE_SNPRINTF)
int snprintf(char *, size_t, const char *, ...)
#ifdef __ATTRIBUTE___FORMAT_OK
__attribute__((format(printf, 3, 4)))
#endif /* __ATTRIBUTE___FORMAT_OK */
;
#endif /* !defined(HAVE_SNPRINTF) */
#endif /* __osf__ */
#include "machdep.h"
/*
* On platforms where the CPU doesn't support unaligned loads, force
* unaligned accesses to abort with SIGBUS, rather than being fixed
* up (slowly) by the OS kernel; on those platforms, misaligned accesses
* are bugs, and we want tcpdump to crash so that the bugs are reported.
*
* The only OS on which this is necessary is DEC OSF/1^W^WDigital
* UNIX^W^WTru64 UNIX.
*/
int
abort_on_misalignment(char *ebuf _U_, size_t ebufsiz _U_)
{
#ifdef __osf__
static int buf[2] = { SSIN_UACPROC, UAC_SIGBUS };
if (setsysinfo(SSI_NVPAIRS, (caddr_t)buf, 1, 0, 0) < 0) {
(void)snprintf(ebuf, ebufsiz, "setsysinfo: errno %d", errno);
return (-1);
}
#endif
return (0);
}