fix segfaults in log line processing

diff --git a/main.c b/main.c
index 3f16cd5d3bb56c364074972a1a491f4f19c8f4d2..4282e4a6a250fa7ac3cd519d3ea4fa0a837dd46b 100644 (file)
--- a/main.c
+++ b/main.c
@@ -46,6 +46,10 @@ netifd_delete_process(struct netifd_process *proc)
                uloop_process_delete(&proc->uloop);
        list_del(&proc->list);
        netifd_fd_delete(&proc->log_fd);
+       if (proc->log_buf) {
+               free(proc->log_buf);
+               proc->log_buf = NULL;
+       }
 }
 
 void
@@ -77,14 +81,13 @@ netifd_process_log_cb(struct uloop_fd *fd, unsigned int events)
        if (!proc->log_buf)
                proc->log_buf = malloc(LOG_BUF_SIZE + 1);
 
-       buf = proc->log_buf + proc->log_buf_ofs;
-       maxlen = LOG_BUF_SIZE - proc->log_buf_ofs;
-
        log_prefix = proc->log_prefix;
        if (!log_prefix)
                log_prefix = "process";
 
 retry:
+       buf = proc->log_buf + proc->log_buf_ofs;
+       maxlen = LOG_BUF_SIZE - proc->log_buf_ofs;
        read_len = len = read(fd->fd, buf, maxlen);
        if (len < 0) {
                if (errno == EAGAIN)
@@ -196,6 +199,7 @@ netifd_start_process(const char **argv, char **env, struct netifd_process *proc)
        uloop_process_add(&proc->uloop);
        list_add_tail(&proc->list, &process_list);
 
+       proc->log_buf_ofs = 0;
        proc->log_uloop.fd = proc->log_fd.fd = pfds[0];
        proc->log_uloop.cb = netifd_process_log_cb;
        netifd_fd_add(&proc->log_fd);