proc_pase: Make sure we may scan up to 15 symbols in name

And do not use strcpy, better to stick with strncpy.

Moreover, to be on a safe side make proc internal
buffer big enough even for "(%16s)" format, it's
hardly possible that the kernel ever change stat
format but just to be on a safe side.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>

cr-dump.c

@@ -449,7 +449,7 @@ static int get_task_stat(pid_t pid, int pid_dir, u8 *comm, u32 *flags,
 	if (ret < 0)
 		goto err;
 
-	strcpy((char *)comm, pps_buf.comm);
+	strncpy((char *)comm, pps_buf.comm, TASK_COMM_LEN);
 	*flags = pps_buf.flags;
 	*start_code = pps_buf.start_code;
 	*end_code = pps_buf.end_code;

include/proc_parse.h

 #ifndef PROC_PARSE_H__
 #define PROC_PARSE_H__
 
-#define TASK_COMM_LEN		16
-#define TASK_COMM_LEN_FMT	"(%15s"
+#define PROC_TASK_COMM_LEN	32
+#define PROC_TASK_COMM_LEN_FMT	"(%31s"
 
 struct proc_pid_stat {
 	int			pid;
-	char			comm[TASK_COMM_LEN];
+	char			comm[PROC_TASK_COMM_LEN];
 	char			state;
 	int			ppid;
 	int			pgid;

proc_parse.c

@@ -188,7 +188,7 @@ int parse_pid_stat(pid_t pid, int pid_dir, struct proc_pid_stat *s)
 
 	memset(s, 0, sizeof(*s));
 	n = fscanf(f,
-	       "%d " TASK_COMM_LEN_FMT " %c %d %d %d %d %d %u %lu %lu %lu %lu "
+	       "%d " PROC_TASK_COMM_LEN_FMT " %c %d %d %d %d %d %u %lu %lu %lu %lu "
 	       "%lu %lu %ld %ld %ld %ld %d %d %llu %lu %ld %lu %lu %lu %lu "
 	       "%lu %lu %lu %lu %lu %lu %lu %lu %lu %d %d %u %u %llu %lu %ld "
 	       "%lu %lu %lu",
@@ -245,7 +245,7 @@ int parse_pid_stat(pid_t pid, int pid_dir, struct proc_pid_stat *s)
 		return -1;
 	}
 
-	s->comm[TASK_COMM_LEN-1] = '\0';
+	s->comm[PROC_TASK_COMM_LEN-1] = '\0';
 	tok = strchr(s->comm, ')');
 	if (tok)
 		*tok = '\0';