[1] | 1 | /* SAMHAIN file system integrity testing */
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| 2 | /* Copyright (C) 1999, 2000 Rainer Wichmann */
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| 3 | /* */
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| 4 | /* This program is free software; you can redistribute it */
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| 5 | /* and/or modify */
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| 6 | /* it under the terms of the GNU General Public License as */
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| 7 | /* published by */
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| 8 | /* the Free Software Foundation; either version 2 of the License, or */
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| 9 | /* (at your option) any later version. */
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| 10 | /* */
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| 11 | /* This program is distributed in the hope that it will be useful, */
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| 12 | /* but WITHOUT ANY WARRANTY; without even the implied warranty of */
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| 13 | /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
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| 14 | /* GNU General Public License for more details. */
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| 15 | /* */
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| 16 | /* You should have received a copy of the GNU General Public License */
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| 17 | /* along with this program; if not, write to the Free Software */
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| 18 | /* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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| 19 |
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| 20 | #include "config_xor.h"
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| 21 |
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| 22 |
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| 23 | #include <stdio.h>
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| 24 | #include <stdlib.h>
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| 25 | #include <string.h>
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| 26 | #include <sys/types.h>
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| 27 | #include <unistd.h>
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| 28 |
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| 29 |
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| 30 | #ifdef HAVE_MEMORY_H
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| 31 | #include <memory.h>
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| 32 | #endif
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| 33 |
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[11] | 34 | #define SH_REAL_SET
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| 35 |
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[1] | 36 | #include "samhain.h"
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| 37 | #include "sh_error.h"
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| 38 | #include "sh_utils.h"
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| 39 | #include "sh_mem.h"
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[134] | 40 | #include "sh_pthread.h"
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[1] | 41 |
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[22] | 42 | extern int safe_logger (int signal, int method, char * details);
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[1] | 43 |
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| 44 | #undef FIL__
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| 45 | #define FIL__ _("sh_mem.c")
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| 46 | static int eblock = 0;
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| 47 |
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| 48 | #ifdef MEM_DEBUG
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| 49 |
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| 50 | #define CHECKBYTE 0x7F
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| 51 |
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| 52 | /* Memory alignment; should be 16 bytes on 64 bit machines.
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| 53 | * -> 32 bytes overhead/allocation
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| 54 | */
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| 55 | #define SH_MEMMULT 16
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| 56 |
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| 57 |
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| 58 | typedef struct mem_struct {
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| 59 | struct mem_struct *next; /* link to next struct */
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| 60 | char * real_address; /* address assigned */
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| 61 | char * address; /* address returned */
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| 62 | unsigned long size; /* size allocated */
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| 63 | char file[20]; /* Allocation file name */
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| 64 | int line; /* Allocation line number */
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| 65 | } memlist_t;
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| 66 |
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| 67 | memlist_t * memlist = NULL;
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| 68 |
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| 69 | int Free_Count = 0, Alloc_Count = 0;
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| 70 | int Now_Alloc_Count = 0, Max_Alloc_Count = 0;
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| 71 | unsigned long Mem_Current = 0, Mem_Max = 0;
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| 72 |
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| 73 | #if 0
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| 74 | #define MEM_DETAILS
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| 75 | #endif
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| 76 |
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| 77 | #ifdef MEM_DETAILS
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| 78 | int max_upto_032 = 0;
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| 79 | int max_upto_064 = 0;
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| 80 | int max_upto_128 = 0;
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| 81 | int max_upto_256 = 0;
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| 82 | int max_upto_512 = 0;
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| 83 | int max_upto_1024 = 0;
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| 84 | int max_upto_4096 = 0;
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| 85 | int max_upto_inf = 0;
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| 86 |
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| 87 | int now_upto_032 = 0;
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| 88 | int now_upto_064 = 0;
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| 89 | int now_upto_128 = 0;
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| 90 | int now_upto_256 = 0;
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| 91 | int now_upto_512 = 0;
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| 92 | int now_upto_1024 = 0;
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| 93 | int now_upto_4096 = 0;
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| 94 | int now_upto_inf = 0;
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| 95 |
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| 96 | int tot_upto_032 = 0;
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| 97 | int tot_upto_064 = 0;
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| 98 | int tot_upto_128 = 0;
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| 99 | int tot_upto_256 = 0;
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| 100 | int tot_upto_512 = 0;
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| 101 | int tot_upto_1024 = 0;
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| 102 | int tot_upto_4096 = 0;
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| 103 | int tot_upto_inf = 0;
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| 104 | #endif
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| 105 |
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[134] | 106 | #ifdef HAVE_PTHREAD
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| 107 | static pthread_once_t mem_is_initialized = PTHREAD_ONCE_INIT;
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| 108 | static pthread_mutex_t mutex_mem;
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| 109 |
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| 110 | static int initialize_mem(void)
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| 111 | {
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| 112 | pthread_mutexattr_t mta;
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| 113 | pthread_mutexattr_settype(&mta, PTHREAD_MUTEX_RECURSIVE);
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| 114 | pthread_mutex_init(&mutex_mem, &mta);
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| 115 | pthread_mutexattr_destroy(&mta);
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| 116 | return 0;
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| 117 | }
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| 118 | #define MEM_MUTEX_INIT (void) pthread_once(&mem_is_initialized, initialize_mem)
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| 119 | #else
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| 120 | #define MEM_MUTEX_INIT ((void)0)
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| 121 | #endif
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| 122 |
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[1] | 123 | #ifdef MEM_LOG
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| 124 | void sh_mem_dump ()
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| 125 | {
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| 126 | memlist_t * this = memlist;
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| 127 |
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| 128 |
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[134] | 129 | FILE * fd;
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[1] | 130 |
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[134] | 131 | MEM_MUTEX_INIT;
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| 132 | SH_MUTEX_LOCK(mutex_mem);
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| 133 |
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| 134 | fd = fopen(MEM_LOG, "w");
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| 135 |
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[1] | 136 | while (this != NULL)
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| 137 | {
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| 138 | fprintf (fd, "%20s %5d %ld\n", this->file, this->line, this->size);
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| 139 | this = this->next;
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| 140 | }
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| 141 | fclose(fd);
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[134] | 142 | SH_MUTEX_UNLOCK(mutex_mem);
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[1] | 143 | return;
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| 144 | }
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| 145 | #else
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| 146 | void sh_mem_dump ()
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| 147 | {
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| 148 | return;
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| 149 | }
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| 150 | #endif
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| 151 |
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| 152 | void sh_mem_stat ()
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| 153 | {
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| 154 | memlist_t * this;
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| 155 |
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| 156 |
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| 157 | SL_ENTER(_("sh_mem_stat"));
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| 158 |
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[134] | 159 | MEM_MUTEX_INIT;
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| 160 | SH_MUTEX_LOCK(mutex_mem);
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| 161 |
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[1] | 162 | if (Alloc_Count == Free_Count)
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| 163 | {
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| 164 | sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_MSTAMP,
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| 165 | Mem_Max, Mem_Current);
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[134] | 166 | goto out;
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[1] | 167 | }
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| 168 |
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| 169 | sh_error_handle (SH_ERR_INFO, FIL__, __LINE__, 0, MSG_MSTAMP2,
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| 170 | Alloc_Count, Free_Count, Max_Alloc_Count);
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| 171 | sh_error_handle (SH_ERR_INFO, FIL__, __LINE__, 0, MSG_MSTAMP,
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| 172 | Mem_Max, Mem_Current);
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| 173 |
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| 174 | #ifdef MEM_DETAILS
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| 175 | fprintf(stderr, "\n");
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| 176 | fprintf(stderr, "__SIZE_____TOTAL___MAXIMUM___\n");
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| 177 | fprintf(stderr, " 32 %6d %6d\n", tot_upto_032, max_upto_032);
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| 178 | fprintf(stderr, " 64 %6d %6d\n", tot_upto_064, max_upto_064);
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| 179 | fprintf(stderr, " 128 %6d %6d\n", tot_upto_128, max_upto_128);
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| 180 | fprintf(stderr, " 256 %6d %6d\n", tot_upto_256, max_upto_256);
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| 181 | fprintf(stderr, " 512 %6d %6d\n", tot_upto_512, max_upto_512);
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| 182 | fprintf(stderr, " 1024 %6d %6d\n", tot_upto_1024, max_upto_1024);
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| 183 | fprintf(stderr, " 4096 %6d %6d\n", tot_upto_4096, max_upto_4096);
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| 184 | fprintf(stderr, " inf %6d %6d\n", tot_upto_inf, max_upto_inf);
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| 185 | fprintf(stderr, "\n");
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| 186 | #endif
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| 187 |
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| 188 | this = memlist;
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| 189 |
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| 190 | while (this != NULL)
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| 191 | {
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| 192 | sh_error_handle (SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_NOTFREE,
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| 193 | this->size, this->file, this->line);
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| 194 | this = this->next;
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| 195 | }
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[134] | 196 | out:
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| 197 | SH_MUTEX_UNLOCK(mutex_mem);
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[1] | 198 | SL_RET0(_("sh_mem_stat"));
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| 199 | }
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| 200 |
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| 201 | void sh_mem_check ()
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| 202 | {
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| 203 | memlist_t * this;
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| 204 | long nerr = 0;
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| 205 |
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| 206 | SL_ENTER(_("sh_mem_check"));
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| 207 |
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[134] | 208 | MEM_MUTEX_INIT;
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| 209 | SH_MUTEX_LOCK(mutex_mem);
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[1] | 210 | sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_MSTAMP,
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| 211 | Mem_Max, Mem_Current);
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| 212 |
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| 213 | this = memlist;
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| 214 |
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| 215 | while (this != NULL)
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| 216 | {
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| 217 | if ( this->address == NULL )
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| 218 | {
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| 219 | sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_E_MNULL);
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| 220 | ++nerr;
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| 221 | }
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| 222 | else
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| 223 | {
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| 224 | if ( this->address[this->size] != CHECKBYTE )
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| 225 | {
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| 226 | sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_E_MOVER,
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| 227 | this->file, this->line, FIL__, __LINE__);
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| 228 | ++nerr;
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| 229 | }
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| 230 | if ( this->real_address[SH_MEMMULT-1] != CHECKBYTE )
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| 231 | {
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| 232 | sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_E_MUNDER,
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| 233 | this->file, this->line, FIL__, __LINE__);
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| 234 | ++nerr;
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| 235 | }
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| 236 | }
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| 237 | this = this->next;
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| 238 | }
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| 239 |
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| 240 | /* if (nerr > 0) abort(); */
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| 241 |
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[134] | 242 | SH_MUTEX_UNLOCK(mutex_mem);
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[1] | 243 | SL_RET0(_("sh_mem_check"));
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| 244 | }
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| 245 |
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| 246 | void * sh_mem_malloc (size_t size, char * file, int line)
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| 247 | {
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| 248 | void * the_realAddress;
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| 249 | void * theAddress;
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| 250 | memlist_t * this;
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| 251 |
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| 252 | SL_ENTER(_("sh_mem_malloc"));
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| 253 |
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[134] | 254 | MEM_MUTEX_INIT;
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| 255 | SH_MUTEX_LOCK(mutex_mem);
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[1] | 256 | the_realAddress = malloc(size + 2 * SH_MEMMULT);
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| 257 |
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| 258 | if ( the_realAddress == NULL )
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| 259 | {
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| 260 | if (eblock == 0)
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| 261 | {
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| 262 | eblock = 1;
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[22] | 263 | (void) safe_logger (0, 0, NULL);
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[1] | 264 | /*
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| 265 | sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_E_MMEM,
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| 266 | file, line);
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| 267 | */
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| 268 | eblock = 0;
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| 269 | }
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| 270 | /* use _exit() rather than exit() - we malloc() in atexit() functions
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| 271 | */
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| 272 | _exit (42);
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| 273 | }
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| 274 |
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| 275 | /* --- Set check bytes. ---
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| 276 | */
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| 277 | theAddress = ((char *) the_realAddress + SH_MEMMULT);
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| 278 |
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| 279 | memset(the_realAddress, CHECKBYTE, SH_MEMMULT);
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| 280 | memset(theAddress, CHECKBYTE, size + 1);
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| 281 | memset(theAddress, 0, 1);
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| 282 |
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| 283 | ++Alloc_Count;
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| 284 | ++Now_Alloc_Count;
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| 285 |
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| 286 | if (Max_Alloc_Count < Now_Alloc_Count)
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| 287 | Max_Alloc_Count = Now_Alloc_Count;
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| 288 |
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| 289 | #ifdef MEM_DETAILS
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| 290 | if (size <= 32)
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| 291 | {
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| 292 | ++now_upto_032;
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| 293 | ++tot_upto_032;
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| 294 | if (now_upto_032 > max_upto_032) max_upto_032 = now_upto_032;
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| 295 | }
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| 296 | else if (size <= 64)
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| 297 | {
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| 298 | ++now_upto_064;
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| 299 | ++tot_upto_064;
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| 300 | if (now_upto_064 > max_upto_064) max_upto_064 = now_upto_064;
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| 301 | }
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| 302 | else if (size <= 128)
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| 303 | {
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| 304 | ++now_upto_128;
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| 305 | ++tot_upto_128;
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| 306 | if (now_upto_128 > max_upto_128) max_upto_128 = now_upto_128;
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| 307 | }
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| 308 | else if (size <= 256)
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| 309 | {
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| 310 | ++now_upto_256;
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| 311 | ++tot_upto_256;
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| 312 | if (now_upto_256 > max_upto_256) max_upto_256 = now_upto_256;
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| 313 | }
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| 314 | else if (size <= 512)
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| 315 | {
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| 316 | ++now_upto_512;
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| 317 | ++tot_upto_512;
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| 318 | if (now_upto_512 > max_upto_512) max_upto_512 = now_upto_512;
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| 319 | }
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| 320 | else if (size <= 1024)
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| 321 | {
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| 322 | ++now_upto_1024;
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| 323 | ++tot_upto_1024;
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| 324 | if (now_upto_1024 > max_upto_1024) max_upto_1024 = now_upto_1024;
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| 325 | }
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| 326 | else if (size <= 4096)
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| 327 | {
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| 328 | ++now_upto_4096;
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| 329 | ++tot_upto_4096;
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| 330 | if (now_upto_4096 > max_upto_4096) max_upto_4096 = now_upto_4096;
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| 331 | }
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| 332 | else
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| 333 | {
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| 334 | ++now_upto_inf;
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| 335 | ++tot_upto_inf;
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| 336 | if (now_upto_inf > max_upto_inf) max_upto_inf = now_upto_inf;
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| 337 |
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| 338 | fprintf(stderr, "\n___BIGSIZE___");
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| 339 | fprintf(stderr, " %6d -> %16s %10d \n", size, file, line);
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| 340 | fprintf(stderr, "\n");
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| 341 |
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| 342 | }
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| 343 | #endif
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| 344 |
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| 345 | Mem_Current += size;
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| 346 | Mem_Max = ( (Mem_Current > Mem_Max) ? Mem_Current : Mem_Max);
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| 347 |
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| 348 | this = (memlist_t *) malloc (sizeof(memlist_t));
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| 349 |
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| 350 | if ( this == NULL)
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| 351 | {
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| 352 | if (eblock == 0)
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| 353 | {
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| 354 | eblock = 1;
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[22] | 355 | (void) safe_logger(0, 0, NULL);
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[1] | 356 | /*
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| 357 | sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_E_MMEM,
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| 358 | file, line);
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| 359 | */
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| 360 | eblock = 0;
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| 361 | }
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[134] | 362 | _exit(42);
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[1] | 363 | }
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| 364 |
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| 365 | /* make list entry */
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| 366 |
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| 367 | this->real_address = the_realAddress;
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| 368 | this->address = theAddress;
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| 369 | this->size = size;
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| 370 | this->line = line;
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| 371 | sl_strlcpy(this->file, file, 20);
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| 372 |
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| 373 | this->next = memlist;
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| 374 | memlist = this;
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| 375 |
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[134] | 376 | SH_MUTEX_UNLOCK(mutex_mem);
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[1] | 377 | SL_RETURN( theAddress, _("sh_mem_malloc"));
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| 378 | }
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| 379 |
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| 380 |
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| 381 | void sh_mem_free (void * a, char * file, int line)
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| 382 | {
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| 383 | memlist_t * this = memlist;
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| 384 | memlist_t * before = memlist;
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| 385 | unsigned long size = 0;
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| 386 |
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| 387 | SL_ENTER(_("sh_mem_free"));
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| 388 |
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[134] | 389 | MEM_MUTEX_INIT;
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| 390 | SH_MUTEX_LOCK(mutex_mem);
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[1] | 391 | if ( a == NULL )
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| 392 | {
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| 393 | sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_E_MNULL,
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| 394 | file, line);
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[134] | 395 | goto out;
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[1] | 396 | }
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| 397 |
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| 398 | /* -- Find record. --
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| 399 | */
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| 400 | while (this != NULL)
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| 401 | {
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| 402 | if (this->address == a)
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| 403 | break;
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| 404 | before = this;
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| 405 | this = this->next;
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| 406 | }
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| 407 |
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| 408 | if (this == NULL)
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| 409 | {
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| 410 | sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_E_MREC,
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| 411 | file, line);
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[134] | 412 | goto out;
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[1] | 413 | }
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| 414 | else
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| 415 | {
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| 416 | a = this->real_address;
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| 417 |
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| 418 | if ( this->address[this->size] != CHECKBYTE )
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| 419 | {
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| 420 | sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_E_MOVER,
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| 421 | this->file, this->line, file, line);
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| 422 | }
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| 423 | if ( this->real_address[SH_MEMMULT-1] != CHECKBYTE )
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| 424 | sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_E_MUNDER,
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| 425 | this->file, this->line, file, line);
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| 426 |
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| 427 | size = this->size;
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| 428 |
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| 429 | if (this == memlist)
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| 430 | memlist = this->next;
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| 431 | else
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| 432 | before->next = this->next;
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| 433 | }
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| 434 |
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| 435 | free(a);
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| 436 | if (this)
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| 437 | free(this);
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| 438 | ++Free_Count;
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| 439 | --Now_Alloc_Count;
|
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| 440 |
|
---|
| 441 | #ifdef MEM_DETAILS
|
---|
| 442 | if (size <= 32)
|
---|
| 443 | --now_upto_032;
|
---|
| 444 | else if (size <= 64)
|
---|
| 445 | --now_upto_064;
|
---|
| 446 | else if (size <= 128)
|
---|
| 447 | --now_upto_128;
|
---|
| 448 | else if (size <= 256)
|
---|
| 449 | --now_upto_256;
|
---|
| 450 | else if (size <= 512)
|
---|
| 451 | --now_upto_512;
|
---|
| 452 | else if (size <= 1024)
|
---|
| 453 | --now_upto_1024;
|
---|
| 454 | else if (size <= 4096)
|
---|
| 455 | --now_upto_4096;
|
---|
| 456 | else
|
---|
| 457 | --now_upto_inf;
|
---|
| 458 | #endif
|
---|
| 459 |
|
---|
| 460 | Mem_Current -= size;
|
---|
[134] | 461 | out:
|
---|
| 462 | SH_MUTEX_UNLOCK(mutex_mem);
|
---|
[1] | 463 | SL_RET0(_("sh_mem_free"));
|
---|
| 464 | }
|
---|
| 465 |
|
---|
| 466 | #else
|
---|
| 467 |
|
---|
| 468 | void sh_mem_free (void * a)
|
---|
| 469 | {
|
---|
| 470 | SL_ENTER(_("sh_mem_free"));
|
---|
| 471 |
|
---|
| 472 | if (a)
|
---|
| 473 | {
|
---|
| 474 | free(a);
|
---|
| 475 | }
|
---|
| 476 | else
|
---|
| 477 | {
|
---|
| 478 | sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_E_MNULL);
|
---|
| 479 | }
|
---|
| 480 | SL_RET0(_("sh_mem_free"));
|
---|
| 481 | }
|
---|
| 482 |
|
---|
| 483 | void * sh_mem_malloc (size_t size)
|
---|
| 484 | {
|
---|
| 485 | void * theAddress;
|
---|
| 486 |
|
---|
| 487 | SL_ENTER(_("sh_mem_malloc"));
|
---|
| 488 |
|
---|
| 489 | theAddress = malloc(size);
|
---|
| 490 |
|
---|
| 491 | if ( theAddress == NULL )
|
---|
| 492 | {
|
---|
| 493 | if (eblock == 0)
|
---|
| 494 | {
|
---|
| 495 | eblock = 1;
|
---|
[22] | 496 | (void) safe_logger(0, 0, NULL);
|
---|
[1] | 497 | /*
|
---|
| 498 | sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_E_MMEM);
|
---|
| 499 | */
|
---|
| 500 | eblock = 0;
|
---|
| 501 | }
|
---|
| 502 | /* use _exit() rather than exit() - we malloc() in atexit()
|
---|
| 503 | */
|
---|
| 504 | _exit (42);
|
---|
| 505 | }
|
---|
| 506 | /* memset (theAddress, 0, 1); *//* needs testing */
|
---|
| 507 |
|
---|
| 508 | SL_RETURN( theAddress, _("sh_mem_malloc"));
|
---|
| 509 | }
|
---|
| 510 | #endif
|
---|