robert.swiecki | 3bb518c | 2010-10-14 00:48:24 +0000 | [diff] [blame] | 1 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 2 | * |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 3 | * honggfuzz - architecture dependent code (MAC OS X) |
| 4 | * ----------------------------------------- |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 5 | * |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 6 | * Author: Robert Swiecki <swiecki@google.com> Felix Gröbert |
| 7 | * <groebert@google.com> |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 8 | * |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 9 | * Copyright 2010-2015 by Google Inc. All Rights Reserved. |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 10 | * |
| 11 | * Licensed under the Apache License, Version 2.0 (the "License"); you may |
| 12 | * not use this file except in compliance with the License. You may obtain |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 13 | * a copy of the License at |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 14 | * |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 15 | * http://www.apache.org/licenses/LICENSE-2.0 |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 16 | * |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 17 | * Unless required by applicable law or agreed to in writing, software |
| 18 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 19 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
| 20 | * implied. See the License for the specific language governing |
| 21 | * permissions and limitations under the License. |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 22 | * |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 23 | */ |
robert.swiecki | 3bb518c | 2010-10-14 00:48:24 +0000 | [diff] [blame] | 24 | |
robert.swiecki@gmail.com | ba85c3e | 2015-02-02 14:55:16 +0000 | [diff] [blame] | 25 | #include "common.h" |
| 26 | #include "arch.h" |
| 27 | |
robert.swiecki | 3bb518c | 2010-10-14 00:48:24 +0000 | [diff] [blame] | 28 | #include <ctype.h> |
groebert@google.com | b857deb | 2010-10-21 19:09:29 +0000 | [diff] [blame] | 29 | #include <dirent.h> |
robert.swiecki@gmail.com | ba85c3e | 2015-02-02 14:55:16 +0000 | [diff] [blame] | 30 | #include <errno.h> |
groebert@google.com | b857deb | 2010-10-21 19:09:29 +0000 | [diff] [blame] | 31 | #include <fcntl.h> |
robert.swiecki@gmail.com | ba85c3e | 2015-02-02 14:55:16 +0000 | [diff] [blame] | 32 | #include <signal.h> |
| 33 | #include <stdio.h> |
| 34 | #include <stdlib.h> |
| 35 | #include <string.h> |
| 36 | #include <sys/cdefs.h> |
| 37 | #include <sys/mman.h> |
| 38 | #include <sys/time.h> |
| 39 | #include <sys/types.h> |
| 40 | #include <sys/wait.h> |
| 41 | #include <sys/resource.h> |
| 42 | #include <time.h> |
| 43 | #include <unistd.h> |
robert.swiecki | 3bb518c | 2010-10-14 00:48:24 +0000 | [diff] [blame] | 44 | |
robert.swiecki | 3bb518c | 2010-10-14 00:48:24 +0000 | [diff] [blame] | 45 | #include "log.h" |
robert.swiecki | 3bb518c | 2010-10-14 00:48:24 +0000 | [diff] [blame] | 46 | #include "util.h" |
groebert@google.com | b857deb | 2010-10-21 19:09:29 +0000 | [diff] [blame] | 47 | #include "files.h" |
robert.swiecki | 3bb518c | 2010-10-14 00:48:24 +0000 | [diff] [blame] | 48 | |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 49 | #include <servers/bootstrap.h> |
| 50 | #include <mach/mach.h> |
| 51 | #include <mach/mach_vm.h> |
| 52 | #include <mach/mach_types.h> |
| 53 | #include <mach/i386/thread_status.h> |
| 54 | #include <mach/task_info.h> |
| 55 | #include <pthread.h> |
| 56 | |
| 57 | #include "mach_exc.h" |
| 58 | #include "mach_excServer.h" |
| 59 | |
| 60 | #import <Foundation/Foundation.h> |
| 61 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 62 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 63 | * Interface to third_party/CrashReport_*.o |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 64 | */ |
groebert@google.com | 43216c8 | 2015-02-13 11:11:38 +0000 | [diff] [blame] | 65 | /* *INDENT-OFF* */ |
| 66 | @interface CrashReport: NSObject - (id) initWithTask:(task_t) |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 67 | task exceptionType:(exception_type_t) |
| 68 | anExceptionType exceptionCode:(mach_exception_data_t) |
| 69 | anExceptionCode exceptionCodeCount:(mach_msg_type_number_t) |
| 70 | anExceptionCodeCount thread:(thread_t) |
| 71 | thread threadStateFlavor:(thread_state_flavor_t) |
| 72 | aThreadStateFlavor threadState:(thread_state_data_t) |
| 73 | aThreadState threadStateCount:(mach_msg_type_number_t) aThreadStateCount; |
| 74 | @end |
groebert@google.com | 43216c8 | 2015-02-13 11:11:38 +0000 | [diff] [blame] | 75 | /* *INDENT-ON* */ |
| 76 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 77 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 78 | * Global to have exception port available in the collection thread |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 79 | */ |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 80 | static mach_port_t g_exception_port = MACH_PORT_NULL; |
| 81 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 82 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 83 | * From xnu/bsd/sys/proc_internal.h |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 84 | */ |
groebert@google.com | c659c0e | 2015-02-13 11:17:00 +0000 | [diff] [blame] | 85 | #define PID_MAX 99999 |
groebert@google.com | 43216c8 | 2015-02-13 11:11:38 +0000 | [diff] [blame] | 86 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 87 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 88 | * Global to store crash info in exception handler thread |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 89 | */ |
groebert@google.com | c659c0e | 2015-02-13 11:17:00 +0000 | [diff] [blame] | 90 | fuzzer_t g_fuzzer_crash_information[PID_MAX + 1]; |
groebert@google.com | 43216c8 | 2015-02-13 11:11:38 +0000 | [diff] [blame] | 91 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 92 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 93 | * Global to have a unique service name for each honggfuzz process |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 94 | */ |
groebert@google.com | 76afff9 | 2013-06-20 14:43:41 +0000 | [diff] [blame] | 95 | char g_service_name[256]; |
groebert@google.com | 16610ee | 2013-06-19 13:06:12 +0000 | [diff] [blame] | 96 | |
robert.swiecki | 3bb518c | 2010-10-14 00:48:24 +0000 | [diff] [blame] | 97 | struct { |
| 98 | bool important; |
| 99 | const char *descr; |
| 100 | } arch_sigs[NSIG]; |
| 101 | |
robert.swiecki@gmail.com | c6d2875 | 2014-01-08 12:02:37 +0000 | [diff] [blame] | 102 | __attribute__ ((constructor)) |
| 103 | void arch_initSigs(void) |
robert.swiecki | 3bb518c | 2010-10-14 00:48:24 +0000 | [diff] [blame] | 104 | { |
| 105 | for (int x = 0; x < NSIG; x++) |
| 106 | arch_sigs[x].important = false; |
| 107 | |
| 108 | arch_sigs[SIGILL].important = true; |
| 109 | arch_sigs[SIGILL].descr = "SIGILL"; |
| 110 | arch_sigs[SIGFPE].important = true; |
| 111 | arch_sigs[SIGFPE].descr = "SIGFPE"; |
| 112 | arch_sigs[SIGSEGV].important = true; |
| 113 | arch_sigs[SIGSEGV].descr = "SIGSEGV"; |
| 114 | arch_sigs[SIGBUS].important = true; |
| 115 | arch_sigs[SIGBUS].descr = "SIGBUS"; |
| 116 | arch_sigs[SIGABRT].important = true; |
| 117 | arch_sigs[SIGABRT].descr = "SIGABRT"; |
| 118 | } |
| 119 | |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 120 | const char *exception_to_string(int exception) |
groebert@google.com | b857deb | 2010-10-21 19:09:29 +0000 | [diff] [blame] | 121 | { |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 122 | switch (exception) { |
| 123 | case EXC_BAD_ACCESS: |
| 124 | return "EXC_BAD_ACCESS"; |
| 125 | case EXC_BAD_INSTRUCTION: |
| 126 | return "EXC_BAD_INSTRUCTION"; |
| 127 | case EXC_ARITHMETIC: |
| 128 | return "EXC_ARITHMETIC"; |
| 129 | case EXC_EMULATION: |
| 130 | return "EXC_EMULATION"; |
| 131 | case EXC_SOFTWARE: |
| 132 | return "EXC_SOFTWARE"; |
| 133 | case EXC_BREAKPOINT: |
| 134 | return "EXC_BREAKPOINT"; |
| 135 | case EXC_SYSCALL: |
| 136 | return "EXC_SYSCALL"; |
| 137 | case EXC_MACH_SYSCALL: |
| 138 | return "EXC_MACH_SYSCALL"; |
| 139 | case EXC_RPC_ALERT: |
| 140 | return "EXC_RPC_ALERT"; |
| 141 | case EXC_CRASH: |
| 142 | return "EXC_CRASH"; |
groebert@google.com | b857deb | 2010-10-21 19:09:29 +0000 | [diff] [blame] | 143 | } |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 144 | return "UNKNOWN"; |
groebert@google.com | b857deb | 2010-10-21 19:09:29 +0000 | [diff] [blame] | 145 | } |
| 146 | |
| 147 | /* |
robert.swiecki | 3bb518c | 2010-10-14 00:48:24 +0000 | [diff] [blame] | 148 | * Returns true if a process exited (so, presumably, we can delete an input |
| 149 | * file) |
| 150 | */ |
robert.swiecki@gmail.com | 751f686 | 2015-02-11 15:03:26 +0000 | [diff] [blame] | 151 | static bool arch_analyzeSignal(honggfuzz_t * hfuzz, int status, fuzzer_t * fuzzer) |
robert.swiecki | 3bb518c | 2010-10-14 00:48:24 +0000 | [diff] [blame] | 152 | { |
| 153 | /* |
| 154 | * Resumed by delivery of SIGCONT |
| 155 | */ |
| 156 | if (WIFCONTINUED(status)) { |
| 157 | return false; |
| 158 | } |
| 159 | |
| 160 | /* |
| 161 | * Boring, the process just exited |
| 162 | */ |
| 163 | if (WIFEXITED(status)) { |
robert.swiecki@gmail.com | bb5d264 | 2015-02-25 20:00:00 +0000 | [diff] [blame] | 164 | LOGMSG(l_DEBUG, "Process (pid %d) exited normally with status %d", fuzzer->pid, |
| 165 | WEXITSTATUS(status)); |
robert.swiecki | 3bb518c | 2010-10-14 00:48:24 +0000 | [diff] [blame] | 166 | return true; |
| 167 | } |
| 168 | |
| 169 | /* |
| 170 | * Shouldn't really happen, but, well.. |
| 171 | */ |
| 172 | if (!WIFSIGNALED(status)) { |
| 173 | LOGMSG(l_ERROR, |
| 174 | "Process (pid %d) exited with the following status %d, please report that as a bug", |
robert.swiecki@gmail.com | 751f686 | 2015-02-11 15:03:26 +0000 | [diff] [blame] | 175 | fuzzer->pid, status); |
robert.swiecki | 3bb518c | 2010-10-14 00:48:24 +0000 | [diff] [blame] | 176 | return true; |
| 177 | } |
| 178 | |
| 179 | int termsig = WTERMSIG(status); |
robert.swiecki@gmail.com | bb5d264 | 2015-02-25 20:00:00 +0000 | [diff] [blame] | 180 | LOGMSG(l_DEBUG, "Process (pid %d) killed by signal %d '%s'", fuzzer->pid, termsig, |
| 181 | strsignal(termsig)); |
robert.swiecki | 3bb518c | 2010-10-14 00:48:24 +0000 | [diff] [blame] | 182 | if (!arch_sigs[termsig].important) { |
| 183 | LOGMSG(l_DEBUG, "It's not that important signal, skipping"); |
| 184 | return true; |
| 185 | } |
| 186 | |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 187 | /* |
| 188 | * Signal is interesting |
| 189 | */ |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 190 | char newname[PATH_MAX]; |
groebert@google.com | b857deb | 2010-10-21 19:09:29 +0000 | [diff] [blame] | 191 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 192 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 193 | * Get data from exception handler |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 194 | */ |
groebert@google.com | 43216c8 | 2015-02-13 11:11:38 +0000 | [diff] [blame] | 195 | fuzzer->pc = g_fuzzer_crash_information[fuzzer->pid].pc; |
| 196 | fuzzer->exception = g_fuzzer_crash_information[fuzzer->pid].exception; |
| 197 | fuzzer->access = g_fuzzer_crash_information[fuzzer->pid].access; |
| 198 | fuzzer->backtrace = g_fuzzer_crash_information[fuzzer->pid].backtrace; |
| 199 | |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 200 | if (hfuzz->saveUnique) { |
| 201 | snprintf(newname, sizeof(newname), |
| 202 | "%s.%s.PC.%.16llx.STACK.%.16llx.ADDR.%.16llx.%s.%s", |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 203 | arch_sigs[termsig].descr, |
| 204 | exception_to_string(fuzzer->exception), fuzzer->pc, |
| 205 | fuzzer->backtrace, fuzzer->access, fuzzer->origFileName, hfuzz->fileExtn); |
groebert@google.com | b857deb | 2010-10-21 19:09:29 +0000 | [diff] [blame] | 206 | } else { |
groebert@google.com | b857deb | 2010-10-21 19:09:29 +0000 | [diff] [blame] | 207 | |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 208 | char localtmstr[PATH_MAX]; |
| 209 | util_getLocalTime("%F.%H.%M.%S", localtmstr, sizeof(localtmstr)); |
| 210 | |
| 211 | snprintf(newname, sizeof(newname), |
| 212 | "%s.%s.PC.%.16llx.STACK.%.16llx.ADDR.%.16llx.TIME.%s.PID.%.5d.%s.%s", |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 213 | arch_sigs[termsig].descr, |
| 214 | exception_to_string(fuzzer->exception), fuzzer->pc, |
robert.swiecki@gmail.com | bb5d264 | 2015-02-25 20:00:00 +0000 | [diff] [blame] | 215 | fuzzer->backtrace, fuzzer->access, localtmstr, fuzzer->pid, fuzzer->origFileName, |
| 216 | hfuzz->fileExtn); |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 217 | } |
| 218 | |
robert.swiecki@gmail.com | 751f686 | 2015-02-11 15:03:26 +0000 | [diff] [blame] | 219 | if (link(fuzzer->fileName, newname) == 0) { |
groebert@google.com | 43216c8 | 2015-02-13 11:11:38 +0000 | [diff] [blame] | 220 | LOGMSG(l_INFO, "Ok, that's interesting, saved '%s' as '%s'", fuzzer->fileName, newname); |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 221 | } else { |
| 222 | if (errno == EEXIST) { |
| 223 | LOGMSG(l_INFO, "It seems that '%s' already exists, skipping", newname); |
| 224 | } else { |
groebert@google.com | 43216c8 | 2015-02-13 11:11:38 +0000 | [diff] [blame] | 225 | LOGMSG_P(l_ERROR, "Couldn't link '%s' to '%s'", fuzzer->fileName, newname); |
groebert@google.com | b857deb | 2010-10-21 19:09:29 +0000 | [diff] [blame] | 226 | } |
robert.swiecki | 3bb518c | 2010-10-14 00:48:24 +0000 | [diff] [blame] | 227 | } |
groebert@google.com | b857deb | 2010-10-21 19:09:29 +0000 | [diff] [blame] | 228 | |
robert.swiecki | 3bb518c | 2010-10-14 00:48:24 +0000 | [diff] [blame] | 229 | return true; |
| 230 | } |
| 231 | |
| 232 | bool arch_launchChild(honggfuzz_t * hfuzz, char *fileName) |
| 233 | { |
robert.swiecki | 3bb518c | 2010-10-14 00:48:24 +0000 | [diff] [blame] | 234 | #define ARGS_MAX 512 |
| 235 | char *args[ARGS_MAX + 2]; |
| 236 | |
| 237 | int x; |
| 238 | |
| 239 | for (x = 0; x < ARGS_MAX && hfuzz->cmdline[x]; x++) { |
robert.swiecki@gmail.com | a0d8714 | 2015-02-14 13:11:18 +0000 | [diff] [blame] | 240 | if (!hfuzz->fuzzStdin && strcmp(hfuzz->cmdline[x], _HF_FILE_PLACEHOLDER) == 0) { |
robert.swiecki | 3bb518c | 2010-10-14 00:48:24 +0000 | [diff] [blame] | 241 | args[x] = fileName; |
| 242 | } else { |
| 243 | args[x] = hfuzz->cmdline[x]; |
| 244 | } |
| 245 | } |
| 246 | |
| 247 | args[x++] = NULL; |
| 248 | |
| 249 | LOGMSG(l_DEBUG, "Launching '%s' on file '%s'", args[0], fileName); |
| 250 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 251 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 252 | * Get child's bootstrap port. |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 253 | */ |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 254 | mach_port_t child_bootstrap = MACH_PORT_NULL; |
| 255 | if (task_get_bootstrap_port(mach_task_self(), &child_bootstrap) != KERN_SUCCESS) { |
| 256 | return false; |
| 257 | } |
| 258 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 259 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 260 | * Get exception port. |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 261 | */ |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 262 | mach_port_t exception_port = MACH_PORT_NULL; |
| 263 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 264 | if (bootstrap_look_up(child_bootstrap, g_service_name, &exception_port) |
| 265 | != KERN_SUCCESS) { |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 266 | return false; |
| 267 | } |
| 268 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 269 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 270 | * Here we register the exception port in the child |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 271 | */ |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 272 | if (task_set_exception_ports(mach_task_self(), |
| 273 | EXC_MASK_CRASH, |
| 274 | exception_port, |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 275 | EXCEPTION_STATE_IDENTITY | |
| 276 | MACH_EXCEPTION_CODES, MACHINE_THREAD_STATE) != KERN_SUCCESS) { |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 277 | return false; |
| 278 | } |
| 279 | |
robert.swiecki | 3bb518c | 2010-10-14 00:48:24 +0000 | [diff] [blame] | 280 | /* |
| 281 | * Set timeout (prof), real timeout (2*prof), and rlimit_cpu (2*prof) |
| 282 | */ |
| 283 | if (hfuzz->tmOut) { |
| 284 | struct itimerval it; |
| 285 | |
| 286 | /* |
| 287 | * The hfuzz->tmOut is real CPU usage time... |
| 288 | */ |
| 289 | it.it_value.tv_sec = hfuzz->tmOut; |
| 290 | it.it_value.tv_usec = 0; |
| 291 | it.it_interval.tv_sec = 0; |
| 292 | it.it_interval.tv_usec = 0; |
| 293 | if (setitimer(ITIMER_PROF, &it, NULL) == -1) { |
| 294 | LOGMSG_P(l_ERROR, "Couldn't set the ITIMER_PROF timer"); |
| 295 | return false; |
| 296 | } |
| 297 | |
| 298 | /* |
| 299 | * ...so, if a process sleeps, this one should |
| 300 | * trigger a signal... |
| 301 | */ |
| 302 | it.it_value.tv_sec = hfuzz->tmOut * 2UL; |
| 303 | it.it_value.tv_usec = 0; |
| 304 | it.it_interval.tv_sec = 0; |
| 305 | it.it_interval.tv_usec = 0; |
| 306 | if (setitimer(ITIMER_REAL, &it, NULL) == -1) { |
| 307 | LOGMSG_P(l_ERROR, "Couldn't set the ITIMER_REAL timer"); |
| 308 | return false; |
| 309 | } |
| 310 | |
| 311 | /* |
| 312 | * ..if a process sleeps and catches SIGPROF/SIGALRM |
| 313 | * rlimits won't help either |
| 314 | */ |
| 315 | struct rlimit rl; |
| 316 | |
| 317 | rl.rlim_cur = hfuzz->tmOut * 2; |
| 318 | rl.rlim_max = hfuzz->tmOut * 2; |
| 319 | if (setrlimit(RLIMIT_CPU, &rl) == -1) { |
| 320 | LOGMSG_P(l_ERROR, "Couldn't enforce the RLIMIT_CPU resource limit"); |
| 321 | return false; |
| 322 | } |
| 323 | } |
| 324 | |
| 325 | /* |
| 326 | * The address space limit. If big enough - roughly the size of RAM used |
| 327 | */ |
| 328 | if (hfuzz->asLimit) { |
| 329 | struct rlimit rl; |
| 330 | |
| 331 | rl.rlim_cur = hfuzz->asLimit * 1024UL * 1024UL; |
| 332 | rl.rlim_max = hfuzz->asLimit * 1024UL * 1024UL; |
| 333 | if (setrlimit(RLIMIT_AS, &rl) == -1) { |
| 334 | LOGMSG_P(l_DEBUG, "Couldn't encforce the RLIMIT_AS resource limit, ignoring"); |
| 335 | } |
| 336 | } |
| 337 | |
| 338 | if (hfuzz->nullifyStdio) { |
| 339 | util_nullifyStdio(); |
| 340 | } |
| 341 | |
| 342 | if (hfuzz->fuzzStdin) { |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 343 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 344 | * Uglyyyyyy ;) |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 345 | */ |
robert.swiecki | 3bb518c | 2010-10-14 00:48:24 +0000 | [diff] [blame] | 346 | if (!util_redirectStdin(fileName)) { |
| 347 | return false; |
| 348 | } |
| 349 | } |
| 350 | |
robert.swiecki@gmail.com | 7e3c48c | 2015-03-04 02:44:43 +0000 | [diff] [blame^] | 351 | for (size_t i = 0; i < ARRAYSIZE(hfuzz->envs) && hfuzz->envs[i]; i++) { |
| 352 | char *env = strdupa(hfuzz->envs[i]); |
| 353 | char *eq = strchr(env, '='); |
| 354 | if (eq == NULL) { |
| 355 | continue; |
| 356 | } |
| 357 | *eq = '\0'; |
| 358 | setenv(env, eq + 1, 1); |
| 359 | } |
| 360 | |
robert.swiecki | 3bb518c | 2010-10-14 00:48:24 +0000 | [diff] [blame] | 361 | execvp(args[0], args); |
| 362 | |
| 363 | util_recoverStdio(); |
| 364 | LOGMSG(l_FATAL, "Failed to create new '%s' process", args[0]); |
| 365 | return false; |
| 366 | } |
| 367 | |
robert.swiecki@gmail.com | 751f686 | 2015-02-11 15:03:26 +0000 | [diff] [blame] | 368 | void arch_reapChild(honggfuzz_t * hfuzz, fuzzer_t * fuzzer) |
robert.swiecki | 3bb518c | 2010-10-14 00:48:24 +0000 | [diff] [blame] | 369 | { |
groebert@google.com | 06d9380 | 2013-09-16 12:06:40 +0000 | [diff] [blame] | 370 | /* |
| 371 | * First check manually if we have expired childs |
| 372 | */ |
| 373 | |
groebert@google.com | 43216c8 | 2015-02-13 11:11:38 +0000 | [diff] [blame] | 374 | double diff = difftime(time(NULL), fuzzer->timeStarted); |
robert.swiecki@gmail.com | 751f686 | 2015-02-11 15:03:26 +0000 | [diff] [blame] | 375 | if (diff > (double)hfuzz->tmOut) { |
| 376 | LOGMSG(l_WARN, |
| 377 | "Process pid %d is overdue (%f seconds, max %f seconds %f), sending a SIGKILL", |
groebert@google.com | 43216c8 | 2015-02-13 11:11:38 +0000 | [diff] [blame] | 378 | fuzzer->pid, diff, (double)hfuzz->tmOut); |
| 379 | kill(fuzzer->pid, SIGKILL); |
groebert@google.com | 06d9380 | 2013-09-16 12:06:40 +0000 | [diff] [blame] | 380 | } |
| 381 | |
| 382 | /* |
robert.swiecki@gmail.com | 751f686 | 2015-02-11 15:03:26 +0000 | [diff] [blame] | 383 | * Now check for signals using wait4 |
groebert@google.com | 06d9380 | 2013-09-16 12:06:40 +0000 | [diff] [blame] | 384 | */ |
robert.swiecki@gmail.com | 751f686 | 2015-02-11 15:03:26 +0000 | [diff] [blame] | 385 | |
robert.swiecki@gmail.com | 65cfa1c | 2015-02-11 15:59:28 +0000 | [diff] [blame] | 386 | for (;;) { |
| 387 | int status = 0; |
groebert@google.com | 43216c8 | 2015-02-13 11:11:38 +0000 | [diff] [blame] | 388 | while (wait4(fuzzer->pid, &status, WUNTRACED, NULL) != fuzzer->pid) ; |
robert.swiecki@gmail.com | 65cfa1c | 2015-02-11 15:59:28 +0000 | [diff] [blame] | 389 | LOGMSG(l_DEBUG, "Process (pid %d) came back with status %d", fuzzer->pid, status); |
robert.swiecki | 3bb518c | 2010-10-14 00:48:24 +0000 | [diff] [blame] | 390 | |
groebert@google.com | 43216c8 | 2015-02-13 11:11:38 +0000 | [diff] [blame] | 391 | if (arch_analyzeSignal(hfuzz, status, fuzzer)) { |
robert.swiecki@gmail.com | 65cfa1c | 2015-02-11 15:59:28 +0000 | [diff] [blame] | 392 | return; |
| 393 | } |
robert.swiecki | 3bb518c | 2010-10-14 00:48:24 +0000 | [diff] [blame] | 394 | } |
robert.swiecki@gmail.com | 751f686 | 2015-02-11 15:03:26 +0000 | [diff] [blame] | 395 | } |
robert.swiecki | 28cba5c | 2011-06-22 01:38:55 +0000 | [diff] [blame] | 396 | |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 397 | void *wait_for_exception() |
| 398 | { |
| 399 | while (1) { |
| 400 | mach_msg_server_once(mach_exc_server, 4096, g_exception_port, MACH_MSG_OPTION_NONE); |
| 401 | } |
| 402 | } |
| 403 | |
| 404 | /* |
| 405 | * Called once before fuzzing starts. Prepare mach ports for attaching crash reporter. |
| 406 | */ |
robert.swiecki@gmail.com | 6d6f756 | 2015-02-17 22:18:51 +0000 | [diff] [blame] | 407 | bool arch_archInit(honggfuzz_t * hfuzz) |
robert.swiecki | 28cba5c | 2011-06-22 01:38:55 +0000 | [diff] [blame] | 408 | { |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 409 | char plist[PATH_MAX]; |
robert.swiecki@gmail.com | bb5d264 | 2015-02-25 20:00:00 +0000 | [diff] [blame] | 410 | snprintf(plist, sizeof(plist), "/Users/%s/Library/Preferences/com.apple.DebugSymbols.plist", |
| 411 | getlogin()); |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 412 | |
| 413 | if (files_exists(plist)) { |
| 414 | LOGMSG(l_WARN, |
| 415 | "honggfuzz won't work if DBGShellCommands are set in ~/Library/Preferences/com.apple.DebugSymbols.plist"); |
| 416 | } |
| 417 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 418 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 419 | * Allocate exception port. |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 420 | */ |
robert.swiecki@gmail.com | bb5d264 | 2015-02-25 20:00:00 +0000 | [diff] [blame] | 421 | if (mach_port_allocate(mach_task_self(), MACH_PORT_RIGHT_RECEIVE, &g_exception_port) != |
| 422 | KERN_SUCCESS) { |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 423 | return false; |
| 424 | } |
| 425 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 426 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 427 | * Insert exception receive port. |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 428 | */ |
| 429 | if (mach_port_insert_right |
| 430 | (mach_task_self(), g_exception_port, g_exception_port, |
| 431 | MACH_MSG_TYPE_MAKE_SEND) != KERN_SUCCESS) { |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 432 | return false; |
| 433 | } |
| 434 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 435 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 436 | * Get bootstrap port. |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 437 | */ |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 438 | mach_port_t bootstrap = MACH_PORT_NULL; |
| 439 | if (task_get_bootstrap_port(mach_task_self(), &bootstrap) != KERN_SUCCESS) { |
| 440 | return false; |
| 441 | } |
| 442 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 443 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 444 | * Generate and register exception port service. |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 445 | */ |
robert.swiecki@gmail.com | bb5d264 | 2015-02-25 20:00:00 +0000 | [diff] [blame] | 446 | snprintf(g_service_name, sizeof(g_service_name), "com.google.code.honggfuzz.%d", |
| 447 | util_rndGet(0, 999999)); |
groebert@google.com | 76afff9 | 2013-06-20 14:43:41 +0000 | [diff] [blame] | 448 | if (bootstrap_check_in(bootstrap, g_service_name, &g_exception_port) != KERN_SUCCESS) { |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 449 | return false; |
| 450 | } |
| 451 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 452 | /* |
| 453 | * Create a collection thread to catch the exceptions from the |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 454 | * children |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 455 | */ |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 456 | pthread_t exception_thread; |
| 457 | |
| 458 | if (pthread_create(&exception_thread, NULL, wait_for_exception, 0)) { |
| 459 | LOGMSG(l_FATAL, "Parent: could not create thread to wait for child's exception"); |
| 460 | return false; |
| 461 | } |
| 462 | |
| 463 | if (pthread_detach(exception_thread)) { |
| 464 | LOGMSG(l_FATAL, "Parent: could not detach thread to wait for child's exception"); |
| 465 | return false; |
| 466 | } |
| 467 | |
robert.swiecki | 28cba5c | 2011-06-22 01:38:55 +0000 | [diff] [blame] | 468 | return true; |
| 469 | } |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 470 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 471 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 472 | * Write the crash report to DEBUG |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 473 | */ |
| 474 | void |
| 475 | write_crash_report(thread_port_t thread, |
| 476 | task_port_t task, |
| 477 | exception_type_t exception, |
| 478 | mach_exception_data_t code, |
| 479 | mach_msg_type_number_t code_count, |
| 480 | int *flavor, thread_state_t in_state, mach_msg_type_number_t in_state_count) |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 481 | { |
| 482 | |
| 483 | NSAutoreleasePool *pool =[[NSAutoreleasePool alloc] init]; |
| 484 | CrashReport *_crashReport = nil; |
| 485 | |
groebert@google.com | 43216c8 | 2015-02-13 11:11:38 +0000 | [diff] [blame] | 486 | /* *INDENT-OFF* */ |
| 487 | _crashReport = [[CrashReport alloc] initWithTask:task |
| 488 | exceptionType:exception |
| 489 | exceptionCode:code |
| 490 | exceptionCodeCount:code_count |
| 491 | thread:thread |
| 492 | threadStateFlavor:*flavor |
| 493 | threadState:(thread_state_t)in_state |
| 494 | threadStateCount:in_state_count]; |
| 495 | /* *INDENT-OFF* */ |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 496 | |
| 497 | NSString *crashDescription =[_crashReport description]; |
| 498 | char *description = (char *)[crashDescription UTF8String]; |
| 499 | |
| 500 | LOGMSG(l_DEBUG, "CrashReport: %s", description); |
| 501 | |
| 502 | [_crashReport release]; |
| 503 | [pool drain]; |
| 504 | } |
| 505 | |
| 506 | /* Hash the callstack in an unique way */ |
| 507 | uint64_t hash_callstack(thread_port_t thread, |
| 508 | task_port_t task, |
| 509 | exception_type_t exception, |
| 510 | mach_exception_data_t code, |
| 511 | mach_msg_type_number_t code_count, |
groebert@google.com | 43216c8 | 2015-02-13 11:11:38 +0000 | [diff] [blame] | 512 | int *flavor, |
| 513 | thread_state_t in_state, |
| 514 | mach_msg_type_number_t in_state_count) { |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 515 | |
| 516 | NSAutoreleasePool *pool =[[NSAutoreleasePool alloc] init]; |
| 517 | CrashReport *_crashReport = nil; |
| 518 | |
groebert@google.com | 43216c8 | 2015-02-13 11:11:38 +0000 | [diff] [blame] | 519 | /* *INDENT-OFF* */ |
| 520 | _crashReport = [[CrashReport alloc] initWithTask:task |
| 521 | exceptionType:exception |
| 522 | exceptionCode:code |
| 523 | exceptionCodeCount:code_count |
| 524 | thread:thread |
| 525 | threadStateFlavor:*flavor |
| 526 | threadState:(thread_state_t)in_state |
| 527 | threadStateCount:in_state_count]; |
| 528 | /* *INDENT-ON* */ |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 529 | |
| 530 | NSString *crashDescription =[_crashReport description]; |
| 531 | char *description = (char *)[crashDescription UTF8String]; |
| 532 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 533 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 534 | * The callstack begins with the following word |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 535 | */ |
groebert@google.com | 06d9380 | 2013-09-16 12:06:40 +0000 | [diff] [blame] | 536 | char *callstack = strstr(description, "Crashed:"); |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 537 | |
| 538 | if (callstack == NULL) { |
| 539 | LOGMSG(l_FATAL, "Could not find callstack in crash report %s", description); |
| 540 | } |
| 541 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 542 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 543 | * Scroll forward to the next newline |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 544 | */ |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 545 | char *callstack_start = strstr(callstack, "\n"); |
| 546 | |
| 547 | if (callstack_start == NULL) { |
| 548 | LOGMSG(l_FATAL, "Could not find callstack start in crash report %s", description); |
| 549 | } |
| 550 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 551 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 552 | * Skip the newline |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 553 | */ |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 554 | callstack_start++; |
| 555 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 556 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 557 | * Determine the end of the callstack |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 558 | */ |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 559 | char *callstack_end = strstr(callstack, "\n\nThread"); |
| 560 | |
| 561 | if (callstack_end == NULL) { |
| 562 | LOGMSG(l_FATAL, "Could not find callstack end in crash report %s", description); |
| 563 | } |
| 564 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 565 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 566 | * Make sure it's NULL-terminated |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 567 | */ |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 568 | *callstack_end = '\0'; |
| 569 | |
| 570 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 571 | * |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 572 | * For each line, we only take the last three nibbles from the |
| 573 | * address. |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 574 | * |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 575 | * Sample output: |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 576 | * |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 577 | * 0 libsystem_kernel.dylib 0x00007fff80514d46 __kill + 10 1 |
| 578 | * libsystem_c.dylib 0x00007fff85731ec0 __abort + 193 2 |
| 579 | * libsystem_c.dylib 0x00007fff85732d17 __stack_chk_fail + 195 3 |
| 580 | * stack_buffer_overflow64-stripped 0x000000010339def5 0x10339d000 + |
| 581 | * 3829 4 ??? 0x4141414141414141 0 + 4702111234474983745 |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 582 | * |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 583 | * 0 libsystem_kernel.dylib 0x00007fff80514d46 __kill + 10 1 |
| 584 | * libsystem_c.dylib 0x00007fff85731ec0 __abort + 193 2 |
| 585 | * libsystem_c.dylib 0x00007fff85732d17 __stack_chk_fail + 195 3 |
| 586 | * stack_buffer_overflow64 0x0000000108f41ef5 main + 133 4 ??? |
| 587 | * 0x4141414141414141 0 + 4702111234474983745 |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 588 | * |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 589 | * 0 libsystem_kernel.dylib 0x940023ba __kill + 10 1 |
| 590 | * libsystem_kernel.dylib 0x940014bc kill$UNIX2003 + 32 2 |
| 591 | * libsystem_c.dylib 0x926f362e __abort + 246 3 libsystem_c.dylib |
| 592 | * 0x926c2b60 __chk_fail + 49 4 libsystem_c.dylib 0x926c2bf9 |
| 593 | * __memset_chk + 53 5 stack_buffer_overflow32-stripped 0x00093ee5 |
| 594 | * 0x93000 + 3813 6 libdyld.dylib 0x978c6725 start + 1 |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 595 | * |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 596 | * 0 libsystem_kernel.dylib 0x940023ba __kill + 10 1 |
| 597 | * libsystem_kernel.dylib 0x940014bc kill$UNIX2003 + 32 2 |
| 598 | * libsystem_c.dylib 0x926f362e __abort + 246 3 libsystem_c.dylib |
| 599 | * 0x926c2b60 __chk_fail + 49 4 libsystem_c.dylib 0x926c2bf9 |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 600 | * __memset_chk + 53 5 stack_buffer_overflow32 0x0003cee5 main + 117 6 |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 601 | * libdyld.dylib 0x978c6725 start + 1 |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 602 | * |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 603 | */ |
| 604 | |
| 605 | uint64_t hash = 0; |
| 606 | char *pos = callstack_start; |
| 607 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 608 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 609 | * Go through each line until we run out of lines |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 610 | */ |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 611 | while (strstr(pos, "\t") != NULL) { |
| 612 | /* |
| 613 | * Format: dylib spaces tab address space symbol space plus space offset |
| 614 | * Scroll pos forward to the last three nibbles of the address. |
| 615 | */ |
| 616 | if ((pos = strstr(pos, "\t")) == NULL) |
| 617 | break; |
| 618 | if ((pos = strstr(pos, " ")) == NULL) |
| 619 | break; |
| 620 | pos = pos - 3; |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 621 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 622 | * Hash the last three nibbles |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 623 | */ |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 624 | hash ^= util_hash(pos, 3); |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 625 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 626 | * Scroll pos one forward to skip the current tab |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 627 | */ |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 628 | pos++; |
| 629 | } |
| 630 | |
groebert@google.com | 20e368f | 2015-02-13 14:19:25 +0000 | [diff] [blame] | 631 | LOGMSG(l_DEBUG, "Callstack hash %u", hash); |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 632 | |
| 633 | [_crashReport release]; |
| 634 | [pool drain]; |
| 635 | |
| 636 | return hash; |
| 637 | } |
| 638 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 639 | kern_return_t |
| 640 | catch_mach_exception_raise(mach_port_t exception_port, |
| 641 | mach_port_t thread, |
| 642 | mach_port_t task, |
robert.swiecki@gmail.com | bb5d264 | 2015-02-25 20:00:00 +0000 | [diff] [blame] | 643 | exception_type_t exception, mach_exception_data_t code, |
| 644 | mach_msg_type_number_t codeCnt) |
groebert@google.com | c659c0e | 2015-02-13 11:17:00 +0000 | [diff] [blame] | 645 | { |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 646 | LOGMSG(l_FATAL, "This function should never get called"); |
| 647 | return KERN_SUCCESS; |
| 648 | } |
| 649 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 650 | kern_return_t |
| 651 | catch_mach_exception_raise_state(mach_port_t exception_port, |
| 652 | exception_type_t exception, |
| 653 | const mach_exception_data_t code, |
| 654 | mach_msg_type_number_t codeCnt, |
| 655 | int *flavor, |
| 656 | const thread_state_t old_state, |
| 657 | mach_msg_type_number_t old_stateCnt, |
| 658 | thread_state_t new_state, mach_msg_type_number_t * new_stateCnt) |
groebert@google.com | c659c0e | 2015-02-13 11:17:00 +0000 | [diff] [blame] | 659 | { |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 660 | LOGMSG(l_FATAL, "This function should never get called"); |
| 661 | return KERN_SUCCESS; |
| 662 | } |
| 663 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 664 | kern_return_t catch_mach_exception_raise_state_identity( __attribute__ ((unused)) |
| 665 | exception_port_t exception_port, |
| 666 | thread_port_t thread, |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 667 | task_port_t task, |
| 668 | exception_type_t exception, |
| 669 | mach_exception_data_t code, |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 670 | mach_msg_type_number_t |
| 671 | code_count, int *flavor, |
| 672 | thread_state_t in_state, |
| 673 | mach_msg_type_number_t |
| 674 | in_state_count, |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 675 | thread_state_t out_state, |
groebert@google.com | c659c0e | 2015-02-13 11:17:00 +0000 | [diff] [blame] | 676 | mach_msg_type_number_t * out_state_count) |
| 677 | { |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 678 | if (exception != EXC_CRASH) { |
| 679 | LOGMSG(l_FATAL, "Got non EXC_CRASH! This should not happen."); |
| 680 | } |
| 681 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 682 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 683 | * We will save our results to the honggfuzz_t global |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 684 | */ |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 685 | pid_t pid; |
| 686 | pid_for_task(task, &pid); |
| 687 | LOGMSG(l_DEBUG, "Crash of pid %d", pid); |
| 688 | |
groebert@google.com | 20e368f | 2015-02-13 14:19:25 +0000 | [diff] [blame] | 689 | fuzzer_t *fuzzer = &g_fuzzer_crash_information[pid]; |
robert.swiecki@gmail.com | c6d2875 | 2014-01-08 12:02:37 +0000 | [diff] [blame] | 690 | |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 691 | /* |
| 692 | * Get program counter. |
| 693 | * Cast to void* in order to silence the alignment warnings |
| 694 | */ |
| 695 | |
| 696 | x86_thread_state_t *platform_in_state = ((x86_thread_state_t *) (void *)in_state); |
| 697 | |
| 698 | if (x86_THREAD_STATE32 == platform_in_state->tsh.flavor) { |
groebert@google.com | 20e368f | 2015-02-13 14:19:25 +0000 | [diff] [blame] | 699 | fuzzer->pc = platform_in_state->uts.ts32.__eip; |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 700 | } else { |
groebert@google.com | 20e368f | 2015-02-13 14:19:25 +0000 | [diff] [blame] | 701 | fuzzer->pc = platform_in_state->uts.ts64.__rip; |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 702 | } |
| 703 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 704 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 705 | * Get the exception type |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 706 | */ |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 707 | |
| 708 | exception_type_t exception_type = ((code[0] >> 20) & 0x0F); |
| 709 | |
| 710 | if (exception_type == 0) { |
| 711 | exception_type = EXC_CRASH; |
| 712 | } |
| 713 | |
groebert@google.com | 20e368f | 2015-02-13 14:19:25 +0000 | [diff] [blame] | 714 | fuzzer->exception = exception_type; |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 715 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 716 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 717 | * Get the access address. |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 718 | */ |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 719 | |
| 720 | mach_exception_data_type_t exception_data[2]; |
| 721 | memcpy(exception_data, code, sizeof(exception_data)); |
| 722 | exception_data[0] = (code[0] & ~(0x00000000FFF00000)); |
| 723 | exception_data[1] = code[1]; |
| 724 | |
| 725 | mach_exception_data_type_t access_address = exception_data[1]; |
groebert@google.com | 20e368f | 2015-02-13 14:19:25 +0000 | [diff] [blame] | 726 | fuzzer->access = (uint64_t) access_address; |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 727 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 728 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 729 | * Get a hash of the callstack |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 730 | */ |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 731 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 732 | uint64_t hash = hash_callstack(thread, task, exception, code, code_count, flavor, |
| 733 | in_state, in_state_count); |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 734 | |
groebert@google.com | 20e368f | 2015-02-13 14:19:25 +0000 | [diff] [blame] | 735 | fuzzer->backtrace = hash; |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 736 | |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 737 | /* |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 738 | * Cleanup |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 739 | */ |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 740 | |
| 741 | if (mach_port_deallocate(mach_task_self(), task) != KERN_SUCCESS) { |
| 742 | LOGMSG(l_WARN, "Exception Handler: Could not deallocate task"); |
| 743 | } |
| 744 | |
| 745 | if (mach_port_deallocate(mach_task_self(), thread) != KERN_SUCCESS) { |
| 746 | LOGMSG(l_WARN, "Exception Handler: Could not deallocate thread"); |
| 747 | } |
| 748 | |
robert.swiecki@gmail.com | 3b630b4 | 2015-02-16 10:53:53 +0000 | [diff] [blame] | 749 | return KERN_SUCCESS; // KERN_SUCCESS indicates that this should |
robert.swiecki@gmail.com | 772b33d | 2015-02-14 20:35:00 +0000 | [diff] [blame] | 750 | // not be forwarded to other crash |
| 751 | // handlers |
groebert@google.com | 1bd4c21 | 2013-06-19 11:13:56 +0000 | [diff] [blame] | 752 | } |