tools: acrn-crashlog: fix build warnings with gcc8.1.1

This patch is to fix the build warning with gcc8.1.1. Most of them are
warnings for buffer overflow from snprintf and strncpy.

Signed-off-by: CHEN Gang <gang.c.chen@intel.com>
Reviewed-by: Zhi Jin <zhi.jin@intel.com>
Reviewed-by: Liu, Xinwu <xinwu.liu@intel.com>
Reviewed-by: xiaojin2 <xiaojing.liu@intel.com>

tools/acrn-crashlog/acrnprobe/history.c

@@ -56,10 +56,10 @@ static void entry_to_history_line(struct history_entry *entry,
 	newline[0] = 0;
 	if (entry->log != NULL) {
 		char *ptr;
-		char tmp[MAXLINESIZE];
+		char tmp[PATH_MAX];
 
-		strncpy(tmp, entry->log, MAXLINESIZE);
-		tmp[MAXLINESIZE-1] = 0;
+		strncpy(tmp, entry->log, PATH_MAX);
+		tmp[PATH_MAX - 1] = 0;
 		ptr = strrchr(tmp, '/');
 		if (ptr && ptr[1] == 0)
 			ptr[0] = 0;

tools/acrn-crashlog/acrnprobe/include/property.h

@@ -23,10 +23,14 @@
 #define __PROPERTY_H__
 #include "load_conf.h"
 
-#define VERSION_SIZE       256
+#define VERSION_SIZE		256
+/* UUID_SIZE contains the UUID number, dashes and some buffer*/
+#define UUID_SIZE		48
+/* General BUILD_VERSION like 23690 */
+#define BUILD_VERSION_SIZE	16
 
-char guuid[VERSION_SIZE];
-char gbuildversion[VERSION_SIZE];
+char guuid[UUID_SIZE];
+char gbuildversion[BUILD_VERSION_SIZE];
 
 int init_properties(struct sender_t *sender);
 int swupdated(struct sender_t *sender);

tools/acrn-crashlog/acrnprobe/probeutils.c

@@ -106,7 +106,7 @@ int get_current_time_long(char *buf)
 static int compute_key(char *key, char *seed1, char *seed2)
 {
 	static SHA_CTX *sha;
-	char buf[256] = {'\0',};
+	char buf[VERSION_SIZE] = {'\0',};
 	long long time_ns = 0;
 	char *tmp_key = key;
 	unsigned char results[SHA_DIGEST_LENGTH];
@@ -134,7 +134,7 @@ static int compute_key(char *key, char *seed1, char *seed2)
 		return -1;
 
 	time_ns = get_uptime();
-	snprintf(buf, 256, "%s%s%s%s%lld", gbuildversion, guuid, seed1,
+	snprintf(buf, VERSION_SIZE, "%s%s%s%s%lld", gbuildversion, guuid, seed1,
 		 seed2, time_ns);
 
 	ret = SHA1_Update(sha, (unsigned char *)buf, strlen(buf));
@@ -171,7 +171,7 @@ static int compute_key(char *key, char *seed1, char *seed2)
 static int compute_key256(char *key, char *seed)
 {
 	static SHA256_CTX *sha;
-	char buf[256] = {'\0',};
+	char buf[VERSION_SIZE] = {'\0',};
 	long long time_ns = 0;
 	char *tmp_key = key;
 	unsigned char results[SHA256_DIGEST_LENGTH];
@@ -199,7 +199,7 @@ static int compute_key256(char *key, char *seed)
 		return -1;
 
 	time_ns = get_uptime();
-	snprintf(buf, 256, "%s%s%s%lld", gbuildversion, guuid, seed,
+	snprintf(buf, VERSION_SIZE, "%s%s%s%lld", gbuildversion, guuid, seed,
 		 time_ns);
 
 	ret = SHA256_Update(sha, (unsigned char *)buf, strlen(buf));
@@ -430,7 +430,7 @@ void generate_crashfile(char *dir, char *event, char *hashkey,
  */
 char *generate_log_dir(enum e_dir_mode mode, char *hashkey)
 {
-	char path[PATH_MAX];
+	char *path;
 	char dir[PATH_MAX];
 	unsigned int current;
 	int ret;
@@ -439,19 +439,22 @@ char *generate_log_dir(enum e_dir_mode mode, char *hashkey)
 	if (ret)
 		return NULL;
 
-	snprintf(path, sizeof(path), "%s%d_", dir, current);
-	strncat(path, hashkey,
-		(strlen(path) + strlen(hashkey) >= sizeof(path)) ?
-		(sizeof(path) - strlen(path)) : strlen(hashkey));
+	ret = asprintf(&path, "%s%d_%s", dir, current, hashkey);
+	if (ret == -1) {
+		LOGE("construct log path failed, out of memory\n");
+		hist_raise_infoerror("DIR CREATE");
+		return NULL;
+	}
 
 	ret = mkdir(path, 0777);
 	if (ret == -1) {
 		LOGE("Cannot create dir %s\n", path);
 		hist_raise_infoerror("DIR CREATE");
+		free(path);
 		return NULL;
 	}
 
-	return strdup(path);
+	return path;
 }
 
 int is_boot_id_changed(void)

tools/acrn-crashlog/acrnprobe/property.c

@@ -47,7 +47,7 @@ static void get_device_id(struct sender_t *sender)
 		return;
 	}
 
-	ret = file_read_string(MACHINE_ID, guuid, VERSION_SIZE);
+	ret = file_read_string(MACHINE_ID, guuid, BUILD_VERSION_SIZE);
 	if (ret <= 0)
 		LOGE("Could not get mmc id: %d (%s)\n",
 		     ret, strerror(-ret));
@@ -56,7 +56,8 @@ static void get_device_id(struct sender_t *sender)
 
 	LOGE("Could not find DeviceId, set it to '%s'\n",
 	     DEVICE_ID_UNKNOWN);
-	strncpy(guuid, DEVICE_ID_UNKNOWN, strlen(DEVICE_ID_UNKNOWN));
+	strncpy(guuid, DEVICE_ID_UNKNOWN, UUID_SIZE);
+	guuid[UUID_SIZE - 1] = '\0';
 
 write:
 	overwrite_file(loguuid, guuid);
@@ -66,7 +67,7 @@ write:
 static int get_buildversion(struct sender_t *sender)
 {
 	int ret;
-	char lastbuild[VERSION_SIZE];
+	char lastbuild[BUILD_VERSION_SIZE];
 	char *logbuildid;
 	char *currentbuild = gbuildversion;
 
@@ -84,7 +85,7 @@ static int get_buildversion(struct sender_t *sender)
 		return ret;
 	}
 
-	ret = file_read_string(logbuildid, lastbuild, VERSION_SIZE);
+	ret = file_read_string(logbuildid, lastbuild, BUILD_VERSION_SIZE);
 	if (ret == -ENOENT ||
 	    !ret ||
 	    (ret > 0 && strcmp(currentbuild, lastbuild))) {

tools/acrn-crashlog/common/include/fsutils.h

@@ -32,7 +32,7 @@
 
 #define KB                      (1024)
 #define MB                      (KB * KB)
-#define MAXLINESIZE             (4 * KB)
+#define MAXLINESIZE             (PATH_MAX + 128)
 #define CPBUFFERSIZE            (4 * KB)
 #define PAGE_SIZE               (4 * KB)
 

tools/acrn-crashlog/usercrash/crash_dump.c

@@ -24,6 +24,8 @@
 #define DUMP_FILE "/tmp/core"
 #define BUFFER_SIZE 8196
 #define LINK_LEN 512
+/* 128 means the length of the DUMP_FILE */
+#define FORMAT_LENGTH (LINK_LEN + 128)
 
 static void loginfo(int fd, const char *fmt, ...)
 {
@@ -110,7 +112,7 @@ static int save_coredump(const char *filename)
 static int get_backtrace(int pid, int fd, int sig, const char *comm)
 {
 	char *membkt;
-	char format[512];
+	char format[FORMAT_LENGTH];
 
 	loginfo(fd, "\nBackTrace:\n\n");
 	memset(format, 0, sizeof(format));

tools/acrn-crashlog/usercrash/protocol.c

@@ -112,6 +112,7 @@ static int socket_bind(int fd, const char *name)
 	if (name_len >= SUN_PATH_MAX)
 		return -1;
 	strncpy(addr.sun_path, name, SUN_PATH_MAX);
+	addr.sun_path[SUN_PATH_MAX - 1] = '\0';
 	unlink(addr.sun_path);
 	alen = strlen(addr.sun_path) + sizeof(addr.sun_family);