diff --git a/tools/acrn-crashlog/acrnprobe/android_events.c b/tools/acrn-crashlog/acrnprobe/android_events.c
index 7750ba8bd..47c13db96 100644
--- a/tools/acrn-crashlog/acrnprobe/android_events.c
+++ b/tools/acrn-crashlog/acrnprobe/android_events.c
@@ -72,7 +72,7 @@ static char *next_vm_event(const char *cursor, const char *data,
 			size_t dlen, const struct vm_t *vm)
 {
 	char *line_to_sync = (char *)~(0);
-	char *syncevent;
+	const char *syncevent;
 	int id;
 
 	if (!cursor || !vm)
@@ -408,7 +408,7 @@ static void sync_lines_stage2(const struct sender_t *sender,
 			continue;
 		}
 
-		vm = get_vm_by_name(vm_name);
+		vm = get_vm_by_name((const char *)vm_name);
 		if (!vm || !vm->history_data)
 			continue;
 
diff --git a/tools/acrn-crashlog/acrnprobe/channels.c b/tools/acrn-crashlog/acrnprobe/channels.c
index 8599d04f1..be64c7b31 100644
--- a/tools/acrn-crashlog/acrnprobe/channels.c
+++ b/tools/acrn-crashlog/acrnprobe/channels.c
@@ -60,8 +60,8 @@ static struct channel_t channels[] = {
  *  or NULL on error.
  */
 static struct event_t *create_event(enum event_type_t event_type,
-				char *channel, void *private,
-				int watchfd, char *path)
+				const char *channel, void *private,
+				int watchfd, const char *path)
 {
 	struct event_t *e;
 	int path_len = 0;
diff --git a/tools/acrn-crashlog/acrnprobe/crash_reclassify.c b/tools/acrn-crashlog/acrnprobe/crash_reclassify.c
index 8c8aa8dbe..c66d0a702 100644
--- a/tools/acrn-crashlog/acrnprobe/crash_reclassify.c
+++ b/tools/acrn-crashlog/acrnprobe/crash_reclassify.c
@@ -84,7 +84,7 @@ static int crash_has_mightcontents(const struct crash_t *crash,
 	int ret = 1;
 	int ret_exp;
 	int expid, cntid;
-	char * const *exp;
+	const char * const *exp;
 	const char *content;
 
 	for_each_expression_crash(expid, exp, crash) {
@@ -128,7 +128,7 @@ static int crash_match_content(const struct crash_t *crash, const char *file)
 static int _get_data(const char *file, const struct crash_t *crash,
 			char **data, const int index)
 {
-	char *search_key;
+	const char *search_key;
 	char *value;
 	char *end;
 	int size;
diff --git a/tools/acrn-crashlog/acrnprobe/history.c b/tools/acrn-crashlog/acrnprobe/history.c
index 0cf9806e2..cf9e918f8 100644
--- a/tools/acrn-crashlog/acrnprobe/history.c
+++ b/tools/acrn-crashlog/acrnprobe/history.c
@@ -40,12 +40,12 @@
 		"#EVENT  ID                    DATE                 TYPE\n"
 
 struct history_entry {
-	char *event;
-	char *type;
-	char *log;
+	const char *event;
+	const char *type;
+	const char *log;
 	const char *lastuptime; /* for uptime */
-	char *key;
-	char *eventtime;
+	const char *key;
+	const char *eventtime;
 };
 
 char *history_file;
@@ -115,8 +115,8 @@ free:
 	free(des);
 }
 
-void hist_raise_event(char *event, char *type, char *log, char *lastuptime,
-		char *key)
+void hist_raise_event(const char *event, const char *type, const char *log,
+			const char *lastuptime, const char *key)
 {
 	char line[MAXLINESIZE];
 	char eventtime[LONG_TIME_SIZE];
diff --git a/tools/acrn-crashlog/acrnprobe/include/event_queue.h b/tools/acrn-crashlog/acrnprobe/include/event_queue.h
index 512668855..617f76e2b 100644
--- a/tools/acrn-crashlog/acrnprobe/include/event_queue.h
+++ b/tools/acrn-crashlog/acrnprobe/include/event_queue.h
@@ -22,7 +22,7 @@ __extension__
 struct event_t {
 	int watchfd;
 	enum event_type_t event_type;
-	char *channel;
+	const char *channel;
 	void *private;
 
 	TAILQ_ENTRY(event_t) entries;
diff --git a/tools/acrn-crashlog/acrnprobe/include/history.h b/tools/acrn-crashlog/acrnprobe/include/history.h
index 4e175f354..02a59bf8b 100644
--- a/tools/acrn-crashlog/acrnprobe/include/history.h
+++ b/tools/acrn-crashlog/acrnprobe/include/history.h
@@ -29,7 +29,7 @@ extern char *history_file;
 int prepare_history(void);
 void hist_raise_infoerror(char *type);
 void hist_raise_uptime(char *lastuptime);
-void hist_raise_event(char *event, char *type, char *log, char *lastuptime,
-		char *key);
+void hist_raise_event(const char *event, const char *type, const char *log,
+			const char *lastuptime, const char *key);
 
 #endif
diff --git a/tools/acrn-crashlog/acrnprobe/include/load_conf.h b/tools/acrn-crashlog/acrnprobe/include/load_conf.h
index a88889c60..24dee37c4 100644
--- a/tools/acrn-crashlog/acrnprobe/include/load_conf.h
+++ b/tools/acrn-crashlog/acrnprobe/include/load_conf.h
@@ -8,7 +8,6 @@
 
 #include <stdio.h>
 #include <sys/queue.h>
-#include <openssl/sha.h>
 #include <ext2fs/ext2fs.h>
 #include "event_queue.h"
 #include "probeutils.h"
@@ -25,43 +24,60 @@
 #define VM_EVENT_TYPE_MAX 20
 
 struct trigger_t {
-	char *name;
-	char *type;
-	char *path;
+	const char	*name;
+	size_t		name_len;
+	const char	*type;
+	size_t		type_len;
+	const char	*path;
+	size_t		path_len;
 };
 
 struct vm_t {
-	char *name;
-	char *channel;
-	char *interval;
-	char *syncevent[VM_EVENT_TYPE_MAX];
+	const char	*name;
+	size_t		name_len;
+	const char	*channel;
+	size_t		channel_len;
+	const char	*interval;
+	size_t		interval_len;
+	const char	*syncevent[VM_EVENT_TYPE_MAX];
+	size_t		syncevent_len[VM_EVENT_TYPE_MAX];
 
-	ext2_filsys datafs;
-	unsigned long history_size[SENDER_MAX];
-	char *history_data;
-	char last_synced_line_key[SENDER_MAX][SHORT_KEY_LENGTH + 1];
+	ext2_filsys	datafs;
+	unsigned long	history_size[SENDER_MAX];
+	char		*history_data;
+	char		last_synced_line_key[SENDER_MAX][SHORT_KEY_LENGTH + 1];
 };
 
 struct log_t {
-	char *name;
-	char *type;
-	char *path;
-	char *lines;
+	const char	*name;
+	size_t		name_len;
+	const char	*type;
+	size_t		type_len;
+	const char	*path;
+	size_t		path_len;
+	const char	*lines;
+	size_t		lines_len;
 
 	void (*get)(struct log_t *, void *);
 };
 
 struct crash_t {
-	char *name;
-	char *channel;
-	char *interval;
+	const char	*name;
+	size_t		name_len;
+	const char	*channel;
+	size_t		channel_len;
+	const char	*interval;
+	size_t		interval_len;
 	struct trigger_t *trigger;
-	char *content[CONTENT_MAX];
-	char *mightcontent[EXPRESSION_MAX][CONTENT_MAX];
-	struct log_t *log[LOG_MAX];
-	char *data[DATA_MAX];
+	const char	*content[CONTENT_MAX];
+	size_t		content_len[CONTENT_MAX];
+	const char	*mightcontent[EXPRESSION_MAX][CONTENT_MAX];
+	size_t		mightcontent_len[EXPRESSION_MAX][CONTENT_MAX];
+	struct log_t	*log[LOG_MAX];
+	const char	*data[DATA_MAX];
+	size_t		data_len[DATA_MAX];
 
-	struct crash_t *parents;
+	struct crash_t	*parents;
 
 	TAILQ_ENTRY(crash_t) entries;
 	TAILQ_HEAD(, crash_t) children;
@@ -73,42 +89,53 @@ struct crash_t {
 };
 
 struct info_t {
-	char *name;
-	char *channel;
-	char *interval;
+	const char	*name;
+	size_t		name_len;
+	const char	*channel;
+	size_t		channel_len;
+	const char	*interval;
+	size_t		interval_len;
 	struct trigger_t *trigger;
-	struct log_t *log[LOG_MAX];
+	struct log_t	*log[LOG_MAX];
 };
 
 struct uptime_t {
-	char *name;
-	char *frequency;
-	char *eventhours;
+	const char	*name;
+	size_t		name_len;
+	const char	*frequency;
+	size_t		frequency_len;
+	const char	*eventhours;
+	size_t		eventhours_len;
 
 	int wd;
 	char *path;
 };
 
 struct sender_t {
-	char *name;
-	char *outdir;
-	char *maxcrashdirs;
-	char *maxlines;
-	char *spacequota;
+	const char	*name;
+	size_t		name_len;
+	const char	*outdir;
+	size_t		outdir_len;
+	const char	*maxcrashdirs;
+	size_t		maxcrashdirs_len;
+	const char	*maxlines;
+	size_t		maxlines_len;
+	const char	*spacequota;
+	size_t		spacequota_len;
 	struct uptime_t *uptime;
 
 	void (*send)(struct event_t *);
-	char *log_vmrecordid;
-	int sw_updated; /* each sender has their own record */
+	char		*log_vmrecordid;
+	int		sw_updated; /* each sender has their own record */
 };
 
 struct conf_t {
 	struct sender_t *sender[SENDER_MAX];
-	struct vm_t *vm[VM_MAX];
+	struct vm_t	*vm[VM_MAX];
 	struct trigger_t *trigger[TRIGGER_MAX];
-	struct log_t *log[LOG_MAX];
-	struct crash_t *crash[CRASH_MAX];
-	struct info_t *info[INFO_MAX];
+	struct log_t	*log[LOG_MAX];
+	struct crash_t	*crash[CRASH_MAX];
+	struct info_t	*info[INFO_MAX];
 };
 
 struct conf_t conf;
@@ -168,7 +195,7 @@ struct conf_t conf;
 ({ \
 		int _ret = 0; \
 		int _id; \
-		char *content; \
+		const char *content; \
 		for_each_content_expression(_id, content, exp) { \
 			if (content) \
 				_ret = 1; \
@@ -204,11 +231,11 @@ struct conf_t conf;
 )
 
 int load_conf(const char *path);
-struct trigger_t *get_trigger_by_name(char *name);
-struct log_t *get_log_by_name(char *name);
+struct trigger_t *get_trigger_by_name(const char *name);
+struct log_t *get_log_by_name(const char *name);
 struct vm_t *get_vm_by_name(const char *name);
 int sender_id(const struct sender_t *sender);
-struct sender_t *get_sender_by_name(char *name);
+struct sender_t *get_sender_by_name(const char *name);
 enum event_type_t get_conf_by_wd(int wd, void **private);
 struct crash_t *get_crash_by_wd(int wd);
 int crash_depth(struct crash_t *tcrash);
diff --git a/tools/acrn-crashlog/acrnprobe/include/probeutils.h b/tools/acrn-crashlog/acrnprobe/include/probeutils.h
index eba6eb6d2..45530190e 100644
--- a/tools/acrn-crashlog/acrnprobe/include/probeutils.h
+++ b/tools/acrn-crashlog/acrnprobe/include/probeutils.h
@@ -43,9 +43,9 @@ int get_current_time_long(char buf[32]);
 unsigned long long get_uptime(void);
 char *generate_event_id(const char *seed1, const char *seed2,
 				enum key_type type);
-void generate_crashfile(char *dir, char *event, char *hashkey,
-			char *type, char *data0,
-			char *data1, char *data2);
+void generate_crashfile(const char *dir, const char *event, const char *hashkey,
+			const char *type, const char *data0,
+			const char *data1, const char *data2);
 char *generate_log_dir(enum e_dir_mode mode, char *hashkey);
 int is_boot_id_changed(void);
 
diff --git a/tools/acrn-crashlog/acrnprobe/load_conf.c b/tools/acrn-crashlog/acrnprobe/load_conf.c
index dad45cb78..9060c6d46 100644
--- a/tools/acrn-crashlog/acrnprobe/load_conf.c
+++ b/tools/acrn-crashlog/acrnprobe/load_conf.c
@@ -9,6 +9,7 @@
 #include "load_conf.h"
 #include "event_queue.h"
 #include "log_sys.h"
+#include "strutils.h"
 
 static void print(void)
 {
@@ -21,7 +22,6 @@ static void print(void)
 	struct info_t *info;
 	struct crash_t *crash;
 	struct crash_t *crash_tmp;
-	char buf[512];
 
 #define print_id_item(item, root, id) \
 		LOGD("%-8s(%d): %-15s:(%s)\n", #root, id, #item, root->item)
@@ -90,17 +90,36 @@ static void print(void)
 	}
 
 	for_each_crash(id, crash, conf) {
+		char buf[512];
+		char *tail;
+		int len;
+
 		if (!crash)
 			continue;
 
 		print_id_item(name, crash, id);
-		memset(buf, 0, sizeof(*buf));
+		memset(buf, 0, sizeof(buf));
 		LOGD("%-8s(%d): properties: %s, %s\n", "crash", id,
 		     is_root_crash(crash) ? "root" : "non-root",
 		     is_leaf_crash(crash) ? "leaf" : "non-leaf");
-		sprintf(buf + strlen(buf), "%-8s(%d): children: ", "crash", id);
-		for_crash_children(crash_tmp, crash)
-			sprintf(buf + strlen(buf), "%s ", crash_tmp->name);
+		len = snprintf(buf, sizeof(buf), "%-8s(%d): children: ",
+			     "crash", id);
+		if (s_not_expect(len, sizeof(buf))) {
+			LOGE("failed to construct the children of crash\n");
+			continue;
+		}
+		tail = buf + len;
+		for_crash_children(crash_tmp, crash) {
+			if (len + crash_tmp->name_len + 2 >= sizeof(buf)) {
+				LOGE("names of children too long - truncate\n");
+				break;;
+			}
+			tail = mempcpy(tail, crash_tmp->name,
+				       crash_tmp->name_len);
+			*tail++ = ' ';
+			len += crash_tmp->name_len + 1;
+		}
+		*tail = '\0';
 		LOGD("%s\n", buf);
 		print_id_item(trigger->name, crash, id);
 		print_id_item(channel, crash, id);
@@ -173,7 +192,8 @@ static int get_expid_index(xmlNodePtr cur, const int max)
 		int _ret = -1; \
 		load##mem = xmlNodeGetContent(cur); \
 		if (load##mem) { \
-			type->mem = (char *)load##mem; \
+			type->mem = (const char *)load##mem; \
+			type->mem##_len = xmlStrlen(load##mem); \
 			_ret = 0; \
 		} \
 		_ret; \
@@ -190,7 +210,8 @@ static int get_expid_index(xmlNodePtr cur, const int max)
 		if (load##mem) { \
 			index = get_id_index(cur, max); \
 			if (index != -1) { \
-				type->mem[index] = (char *)load##mem; \
+				type->mem[index] = (const char *)load##mem; \
+				type->mem##_len[index] = xmlStrlen(load##mem); \
 				_ret = 0; \
 			} \
 		} \
@@ -201,9 +222,15 @@ static int get_expid_index(xmlNodePtr cur, const int max)
 #define load_trigger(cur, event) \
 (__extension__ \
 ({ \
+		int _ret = -1; \
 		xmlChar *content = xmlNodeGetContent(cur); \
-		event->trigger = get_trigger_by_name((char *)content); \
-		xmlFree(content); \
+		if (content) { \
+			event->trigger = \
+				get_trigger_by_name((const char *)content); \
+			xmlFree(content); \
+			_ret = 0; \
+		} \
+		_ret; \
 }) \
 )
 
@@ -276,7 +303,7 @@ int sender_id(const struct sender_t *s)
 	return -1;
 }
 
-struct sender_t *get_sender_by_name(char *name)
+struct sender_t *get_sender_by_name(const char *name)
 {
 	int id;
 	struct sender_t *sender;
@@ -291,7 +318,7 @@ struct sender_t *get_sender_by_name(char *name)
 	return NULL;
 }
 
-struct trigger_t *get_trigger_by_name(char *name)
+struct trigger_t *get_trigger_by_name(const char *name)
 {
 	int id;
 	struct trigger_t *trigger;
@@ -305,7 +332,7 @@ struct trigger_t *get_trigger_by_name(char *name)
 	return NULL;
 }
 
-struct log_t *get_log_by_name(char *name)
+struct log_t *get_log_by_name(const char *name)
 {
 	int id;
 	struct log_t *log;
@@ -388,7 +415,9 @@ static int parse_info(xmlNodePtr cur, struct info_t *info)
 			if (id == -1)
 				return -1;
 			content = xmlNodeGetContent(cur);
-			info->log[id] = get_log_by_name((char *)content);
+			if (!content)
+				return -1;
+			info->log[id] = get_log_by_name((const char *)content);
 			xmlFree(content);
 		}
 
@@ -450,7 +479,9 @@ static int parse_crash(xmlNodePtr cur, struct crash_t *crash)
 				return -1;
 
 			content = xmlNodeGetContent(cur);
-			crash->log[id] = get_log_by_name((char *)content);
+			if (!content)
+				return -1;
+			crash->log[id] = get_log_by_name((const char *)content);
 			xmlFree(content);
 		} else if (name_is(cur, "data"))
 			res = load_cur_content_with_id(cur, crash,
@@ -462,7 +493,10 @@ static int parse_crash(xmlNodePtr cur, struct crash_t *crash)
 				return -1;
 
 			content = xmlNodeGetContent(cur);
-			crash->mightcontent[expid][id] = (char *)content;
+			if (!content)
+				return -1;
+			crash->mightcontent[expid][id] = (const char *)content;
+			crash->mightcontent_len[expid][id] = xmlStrlen(content);
 		}
 
 		if (res)
diff --git a/tools/acrn-crashlog/acrnprobe/probeutils.c b/tools/acrn-crashlog/acrnprobe/probeutils.c
index 040228211..1839bf762 100644
--- a/tools/acrn-crashlog/acrnprobe/probeutils.c
+++ b/tools/acrn-crashlog/acrnprobe/probeutils.c
@@ -206,7 +206,7 @@ static int reserve_log_folder(enum e_dir_mode mode, char *dir,
 	int plen;
 	int dlen;
 	struct sender_t *crashlog;
-	char *outdir;
+	const char *outdir;
 	unsigned int maxdirs;
 
 	crashlog = get_sender_by_name("crashlog");
@@ -273,9 +273,9 @@ static int reserve_log_folder(enum e_dir_mode mode, char *dir,
  * @param type Subtype of this event.
  * @param data* String obtained by get_data.
  */
-void generate_crashfile(char *dir, char *event, char *hashkey,
-			char *type, char *data0,
-			char *data1, char *data2)
+void generate_crashfile(const char *dir, const char *event, const char *hashkey,
+			const char *type, const char *data0,
+			const char *data1, const char *data2)
 {
 	char *buf;
 	char *path;
diff --git a/tools/acrn-crashlog/common/fsutils.c b/tools/acrn-crashlog/common/fsutils.c
index ddb31d36d..863027fe2 100644
--- a/tools/acrn-crashlog/common/fsutils.c
+++ b/tools/acrn-crashlog/common/fsutils.c
@@ -72,7 +72,7 @@ static int close_file(const char *filename, FILE *fp)
  *
  * @return 0 if successful, or a negative errno-style value if not.
  */
-int mkdir_p(char *path)
+int mkdir_p(const char *path)
 {
 	if (!path)
 		return -EINVAL;
@@ -621,7 +621,7 @@ int do_copy_eof(const char *src, const char *des)
  * @return 1 if the percentage of using space is lower than the specified quota.
  *         or 0 if not.
  */
-int space_available(char *path, int quota)
+int space_available(const char *path, int quota)
 {
 	struct statfs diskInfo;
 	unsigned long long totalBlocks;
@@ -1070,7 +1070,8 @@ free:
  *
  * @return the count of searched files on success, or -1 on error.
  */
-int find_file(char *dir, char *target_file, int depth, char *path[], int limit)
+int find_file(const char *dir, char *target_file, int depth, char *path[],
+		int limit)
 {
 	int i, ret;
 	int count = 0;
diff --git a/tools/acrn-crashlog/common/include/fsutils.h b/tools/acrn-crashlog/common/include/fsutils.h
index c5ba5fa71..d0f676a2f 100644
--- a/tools/acrn-crashlog/common/include/fsutils.h
+++ b/tools/acrn-crashlog/common/include/fsutils.h
@@ -71,7 +71,7 @@ static inline int get_file_size(const char *filepath)
 }
 
 char *mm_get_line(struct mm_file_t *mfile, int line);
-int mkdir_p(char *path);
+int mkdir_p(const char *path);
 int mm_count_lines(struct mm_file_t *mfile);
 struct mm_file_t *mmap_file(const char *path);
 void unmap_file(struct mm_file_t *mfile);
@@ -89,7 +89,7 @@ int file_read_int(const char *filename, unsigned int *pcurrent);
 int file_update_int(const char *filename, unsigned int current,
 			unsigned int max);
 int do_copy_eof(const char *src, const char *des);
-int space_available(char *path, int quota);
+int space_available(const char *path, int quota);
 int count_lines_in_file(const char *filename);
 int read_full_binary_file(const char *path, unsigned long *size,
 			void **data);
@@ -108,7 +108,8 @@ int filter_filename_startswith(const struct dirent *entry,
 					const void *arg);
 int dir_contains(const char *dir, const char *filename, int exact);
 int lsdir(const char *dir, char *fullname[], int limit);
-int find_file(char *dir, char *target_file, int depth, char *path[], int limit);
+int find_file(const char *dir, char *target_file, int depth, char *path[],
+		int limit);
 int read_file(const char *path, unsigned long *size, void **data);
 int is_ac_filefmt(const char *file_fmt);
 int config_fmt_to_files(const char *file_fmt, char ***out);