diff options
Diffstat (limited to 'sys-libs/glibc/files/2.5/glibc-2.5-gentoo-stack_chk_fail.c')
| -rw-r--r-- | sys-libs/glibc/files/2.5/glibc-2.5-gentoo-stack_chk_fail.c | 311 |
1 files changed, 0 insertions, 311 deletions
diff --git a/sys-libs/glibc/files/2.5/glibc-2.5-gentoo-stack_chk_fail.c b/sys-libs/glibc/files/2.5/glibc-2.5-gentoo-stack_chk_fail.c deleted file mode 100644 index e304440..0000000 --- a/sys-libs/glibc/files/2.5/glibc-2.5-gentoo-stack_chk_fail.c +++ /dev/null @@ -1,311 +0,0 @@ -/* Copyright (C) 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 Gentoo Foundation Inc. - * License terms as above. - * - * Hardened Gentoo SSP 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 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> - */ - -#include <errno.h> -#include <stdlib.h> -#include <unistd.h> -#include <signal.h> - -#include <sys/types.h> - -#include <sysdep-cancel.h> -#include <sys/syscall.h> -#include <bp-checks.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 -# if !defined _KERNEL_NSIG && !defined _NSIG -# error No _NSIG or _KERNEL_NSIG for rt_sigaction -# endif -# if !defined __NR_sigation && !defined __NR_rt_sigaction -# error Cannot do syscall sigaction or rt_sigaction -# endif -#endif - - - -/* Define DO_SOCKET/DO_CONNECT macros to deal with socketcall vs socket/connect */ -#ifdef __NR_socketcall - -# define DO_SOCKET(result,domain,type,protocol) \ - {socketargs[0] = domain; \ - socketargs[1] = type; \ - socketargs[2] = protocol; \ - socketargs[3] = 0; \ - result = INLINE_SYSCALL(socketcall,2,SOCKOP_socket,socketargs);} - -# define DO_CONNECT(result,sockfd,serv_addr,addrlen) \ - {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 - -# define DO_SOCKET(result,domain,type,protocol) \ - {result = INLINE_SYSCALL(socket,3,domain,type,protocol);} - -# define DO_CONNECT(result,sockfd,serv_addr,addrlen) \ - {result = INLINE_SYSCALL(connect,3,sockfd,serv_addr,addrlen);} - -#endif -/* __NR_socketcall */ - - -#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 stack_chk_fail and __stack_smash_handler - * 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. - */ -static inline void -__attribute__ ((__noreturn__ , __always_inline__)) -__hardened_gentoo_stack_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[]=": stack smashing attack"; - static const char msg_inf[]=" in function "; - static const char msg_ssd[]="*** stack smashing 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>"; -#ifdef SSP_SMASH_DUMPS_CORE - static struct sigaction default_abort_act; -#endif - static int log_socket, connect_result; - static struct sockaddr_un sock; -#ifdef __NR_socketcall - static unsigned long int socketargs[4]; -#endif - - /* 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); -#ifdef SSP_SMASH_DUMPS_CORE - /* 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; - /* sigaction doesn't exist on amd64; however rt_sigaction seems to - * exist everywhere. rt_sigaction has an extra parameter - the - * size of sigset_t. - */ -# ifdef __NR_sigation - if (INLINE_SYSCALL(sigaction,3,SIGABRT,&default_abort_act,NULL) == 0) -# else - /* 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 - if (INLINE_SYSCALL(rt_sigaction,4,SIGABRT,&default_abort_act,NULL,_KERNEL_NSIG/8) == 0) -# else - if (INLINE_SYSCALL(rt_sigaction,4,SIGABRT,&default_abort_act,NULL,_NSIG/8) == 0) -# endif -# endif - INLINE_SYSCALL(kill,2,pid,SIGABRT); -#endif - /* 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); -} - -void -__attribute__ ((__noreturn__)) - __stack_chk_fail (void) -{ - __hardened_gentoo_stack_chk_fail(NULL,0); -} - -#ifdef ENABLE_OLD_SSP_COMPAT -void -__attribute__ ((__noreturn__)) -__stack_smash_handler(char func[], int damaged) -{ - __hardened_gentoo_stack_chk_fail(func,damaged); -} -#endif - |