FL-701, FL-715: add glibc-2.18 for testing, masked.

sys-libs/glibc/files/2.18/glibc-2.18-gentoo-chk_fail.c

@@ -0,0 +1,314 @@
+/* Copyright (C) 2004, 2005 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+/* Copyright (C) 2006-2013 Gentoo Foundation Inc.
+ * License terms as above.
+ *
+ * Hardened Gentoo SSP and FORTIFY handler
+ *
+ * An SSP failure handler that does not use functions from the rest of
+ * glibc; it uses the INTERNAL_SYSCALL methods directly.  This ensures
+ * no possibility of recursion into the handler.
+ *
+ * Direct all bug reports to http://bugs.gentoo.org/
+ *
+ * Re-written from the glibc-2.3 Hardened Gentoo SSP handler
+ * by Kevin F. Quinn - <kevquinn[@]gentoo.org>
+ *
+ * The following people contributed to the glibc-2.3 Hardened
+ * Gentoo SSP and FORTIFY handler, from which this implementation draws much:
+ *
+ * Ned Ludd - <solar[@]gentoo.org>
+ * Alexander Gabert - <pappy[@]gentoo.org>
+ * The PaX Team - <pageexec[@]freemail.hu>
+ * Peter S. Mazinger - <ps.m[@]gmx.net>
+ * Yoann Vandoorselaere - <yoann[@]prelude-ids.org>
+ * Robert Connolly - <robert[@]linuxfromscratch.org>
+ * Cory Visi <cory[@]visi.name>
+ * Mike Frysinger <vapier[@]gentoo.org>
+ * Magnus Granberg <zorry[@]ume.nu>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <unistd.h>
+#include <signal.h>
+
+#include <sys/types.h>
+
+#include <sysdep-cancel.h>
+#include <sys/syscall.h>
+
+#include <kernel-features.h>
+
+#include <alloca.h>
+/* from sysdeps */
+#include <socketcall.h>
+/* for the stuff in bits/socket.h */
+#include <sys/socket.h>
+#include <sys/un.h>
+
+/* Sanity check on SYSCALL macro names - force compilation
+ * failure if the names used here do not exist
+ */
+#if !defined __NR_socketcall && !defined __NR_socket
+# error Cannot do syscall socket or socketcall
+#endif
+#if !defined __NR_socketcall && !defined __NR_connect
+# error Cannot do syscall connect or socketcall
+#endif
+#ifndef __NR_write
+# error Cannot do syscall write
+#endif
+#ifndef __NR_close
+# error Cannot do syscall close
+#endif
+#ifndef __NR_getpid
+# error Cannot do syscall getpid
+#endif
+#ifndef __NR_kill
+# error Cannot do syscall kill
+#endif
+#ifndef __NR_exit
+# error Cannot do syscall exit
+#endif
+#ifdef SSP_SMASH_DUMPS_CORE
+# define ENABLE_SSP_SMASH_DUMPS_CORE 1
+# if !defined _KERNEL_NSIG && !defined _NSIG
+#  error No _NSIG or _KERNEL_NSIG for rt_sigaction
+# endif
+# if !defined __NR_sigaction && !defined __NR_rt_sigaction
+#  error Cannot do syscall sigaction or rt_sigaction
+# endif
+/* Although rt_sigaction expects sizeof(sigset_t) - it expects the size
+ * of the _kernel_ sigset_t which is not the same as the user sigset_t.
+ * Most arches have this as _NSIG bits - mips has _KERNEL_NSIG bits for
+ * some reason.
+ */
+# ifdef _KERNEL_NSIG
+#  define _SSP_NSIG _KERNEL_NSIG
+# else
+#  define _SSP_NSIG _NSIG
+# endif
+#else
+# define _SSP_NSIG 0
+# define ENABLE_SSP_SMASH_DUMPS_CORE 0
+#endif
+
+/* Define DO_SIGACTION - default to newer rt signal interface but
+ * fallback to old as needed.
+ */
+#ifdef __NR_rt_sigaction
+# define DO_SIGACTION(signum, act, oldact) \
+	INLINE_SYSCALL(rt_sigaction, 4, signum, act, oldact, _SSP_NSIG/8)
+#else
+# define DO_SIGACTION(signum, act, oldact) \
+	INLINE_SYSCALL(sigaction, 3, signum, act, oldact)
+#endif
+
+/* Define DO_SOCKET/DO_CONNECT functions to deal with socketcall vs socket/connect */
+#if defined(__NR_socket) && defined(__NR_connect)
+# define USE_OLD_SOCKETCALL 0
+#else
+# define USE_OLD_SOCKETCALL 1
+#endif
+
+/* stub out the __NR_'s so we can let gcc optimize away dead code */
+#ifndef __NR_socketcall
+# define __NR_socketcall 0
+#endif
+#ifndef __NR_socket
+# define __NR_socket 0
+#endif
+#ifndef __NR_connect
+# define __NR_connect 0
+#endif
+#define DO_SOCKET(result, domain, type, protocol) \
+	do { \
+		if (USE_OLD_SOCKETCALL) { \
+			socketargs[0] = domain; \
+			socketargs[1] = type; \
+			socketargs[2] = protocol; \
+			socketargs[3] = 0; \
+			result = INLINE_SYSCALL(socketcall, 2, SOCKOP_socket, socketargs); \
+		} else \
+			result = INLINE_SYSCALL(socket, 3, domain, type, protocol); \
+	} while (0)
+#define DO_CONNECT(result, sockfd, serv_addr, addrlen) \
+	do { \
+		if (USE_OLD_SOCKETCALL) { \
+			socketargs[0] = sockfd; \
+			socketargs[1] = (unsigned long int)serv_addr; \
+			socketargs[2] = addrlen; \
+			socketargs[3] = 0; \
+			result = INLINE_SYSCALL(socketcall, 2, SOCKOP_connect, socketargs); \
+		} else \
+			result = INLINE_SYSCALL(connect, 3, sockfd, serv_addr, addrlen); \
+	} while (0)
+
+#ifndef _PATH_LOG
+# define _PATH_LOG "/dev/log"
+#endif
+
+static const char path_log[] = _PATH_LOG;
+
+/* For building glibc with SSP switched on, define __progname to a
+ * constant if building for the run-time loader, to avoid pulling
+ * in more of libc.so into ld.so
+ */
+#ifdef IS_IN_rtld
+static char *__progname = "<rtld>";
+#else
+extern char *__progname;
+#endif
+
+/* Common handler code, used by chk_fail
+ * Inlined to ensure no self-references to the handler within itself.
+ * Data static to avoid putting more than necessary on the stack,
+ * to aid core debugging.
+ */
+__attribute__ ((__noreturn__ , __always_inline__))
+static inline void
+__hardened_gentoo_chk_fail(char func[], int damaged)
+{
+#define MESSAGE_BUFSIZ 256
+	static pid_t pid;
+	static int plen, i;
+	static char message[MESSAGE_BUFSIZ];
+	static const char msg_ssa[] = ": buffer overflow attack";
+	static const char msg_inf[] = " in function ";
+	static const char msg_ssd[] = "*** buffer overflow detected ***: ";
+	static const char msg_terminated[] = " - terminated\n";
+	static const char msg_report[] = "Report to http://bugs.gentoo.org/\n";
+	static const char msg_unknown[] = "<unknown>";
+	static int log_socket, connect_result;
+	static struct sockaddr_un sock;
+	static unsigned long int socketargs[4];
+
+	/* Build socket address
+	 */
+	sock.sun_family = AF_UNIX;
+	i = 0;
+	while ((path_log[i] != '\0') && (i<(sizeof(sock.sun_path)-1))) {
+		sock.sun_path[i] = path_log[i];
+		i++;
+	}
+	sock.sun_path[i] = '\0';
+
+	/* Try SOCK_DGRAM connection to syslog */
+	connect_result = -1;
+	DO_SOCKET(log_socket, AF_UNIX, SOCK_DGRAM, 0);
+	if (log_socket != -1)
+		DO_CONNECT(connect_result, log_socket, &sock, sizeof(sock));
+	if (connect_result == -1) {
+		if (log_socket != -1)
+			INLINE_SYSCALL(close, 1, log_socket);
+		/* Try SOCK_STREAM connection to syslog */
+		DO_SOCKET(log_socket, AF_UNIX, SOCK_STREAM, 0);
+		if (log_socket != -1)
+			DO_CONNECT(connect_result, log_socket, &sock, sizeof(sock));
+	}
+
+	/* Build message.  Messages are generated both in the old style and new style,
+	 * so that log watchers that are configured for the old-style message continue
+	 * to work.
+	 */
+#define strconcat(str) \
+		{i=0; while ((str[i] != '\0') && ((i+plen)<(MESSAGE_BUFSIZ-1))) \
+		{\
+			message[plen+i]=str[i];\
+			i++;\
+		}\
+		plen+=i;}
+
+	/* R.Henderson post-gcc-4 style message */
+	plen = 0;
+	strconcat(msg_ssd);
+	if (__progname != (char *)0)
+		strconcat(__progname)
+	else
+		strconcat(msg_unknown);
+	strconcat(msg_terminated);
+
+	/* Write out error message to STDERR, to syslog if open */
+	INLINE_SYSCALL(write, 3, STDERR_FILENO, message, plen);
+	if (connect_result != -1)
+		INLINE_SYSCALL(write, 3, log_socket, message, plen);
+
+	/* Dr. Etoh pre-gcc-4 style message */
+	plen = 0;
+	if (__progname != (char *)0)
+		strconcat(__progname)
+	else
+		strconcat(msg_unknown);
+	strconcat(msg_ssa);
+	strconcat(msg_inf);
+	if (func != NULL)
+		strconcat(func)
+	else
+		strconcat(msg_unknown);
+	strconcat(msg_terminated);
+	/* Write out error message to STDERR, to syslog if open */
+	INLINE_SYSCALL(write, 3, STDERR_FILENO, message, plen);
+	if (connect_result != -1)
+		INLINE_SYSCALL(write, 3, log_socket, message, plen);
+
+	/* Direct reports to bugs.gentoo.org */
+	plen=0;
+	strconcat(msg_report);
+	message[plen++]='\0';
+
+	/* Write out error message to STDERR, to syslog if open */
+	INLINE_SYSCALL(write, 3, STDERR_FILENO, message, plen);
+	if (connect_result != -1)
+		INLINE_SYSCALL(write, 3, log_socket, message, plen);
+
+	if (log_socket != -1)
+		INLINE_SYSCALL(close, 1, log_socket);
+
+	/* Suicide */
+	pid = INLINE_SYSCALL(getpid, 0);
+
+	if (ENABLE_SSP_SMASH_DUMPS_CORE) {
+		static struct sigaction default_abort_act;
+		/* Remove any user-supplied handler for SIGABRT, before using it */
+		default_abort_act.sa_handler = SIG_DFL;
+		default_abort_act.sa_sigaction = NULL;
+		__sigfillset(&default_abort_act.sa_mask);
+		default_abort_act.sa_flags = 0;
+		if (DO_SIGACTION(SIGABRT, &default_abort_act, NULL) == 0)
+			INLINE_SYSCALL(kill, 2, pid, SIGABRT);
+	}
+
+	/* Note; actions cannot be added to SIGKILL */
+	INLINE_SYSCALL(kill, 2, pid, SIGKILL);
+
+	/* In case the kill didn't work, exit anyway
+	 * The loop prevents gcc thinking this routine returns
+	 */
+	while (1)
+		INLINE_SYSCALL(exit, 0);
+}
+
+__attribute__ ((__noreturn__))
+void __chk_fail(void)
+{
+	__hardened_gentoo_chk_fail(NULL, 0);
+}
+