[BZ #3559]cvs/fedora-glibc-20061128T1037

2006-11-27  Jakub Jelinek  <jakub@redhat.com>
	[BZ #3559]
	* sunrpc/svc_run.c (svc_run): Fail instead of segfaulting if
	malloc crashed.  Don't allocate memory unnecessarily in each
	loop.

1 files changed, 25 insertions, 10 deletions

diff --git a/sunrpc/svc_run.c b/sunrpc/svc_run.c
index 017910b453..feb1bf958e 100644
--- a/sunrpc/svc_run.c
+++ b/sunrpc/svc_run.c
@@ -51,36 +51,51 @@ void
 svc_run (void)
 {
   int i;
+  struct pollfd *my_pollfd = NULL;
+  int last_max_pollfd = 0;
 
   for (;;)
     {
-      struct pollfd *my_pollfd;
+      int max_pollfd = svc_max_pollfd;
+      if (max_pollfd == 0 && svc_pollfd == NULL)
+	break;
 
-      if (svc_max_pollfd == 0 && svc_pollfd == NULL)
-	return;
+      if (last_max_pollfd != max_pollfd)
+	{
+	  struct pollfd *new_pollfd
+	    = realloc (my_pollfd, sizeof (struct pollfd) * max_pollfd);
+
+	  if (new_pollfd == NULL)
+	    {
+	      perror (_("svc_run: - out of memory"));
+	      break;
+	    }
+
+	  last_max_pollfd = max_pollfd;
+	}
 
-      my_pollfd = malloc (sizeof (struct pollfd) * svc_max_pollfd);
-      for (i = 0; i < svc_max_pollfd; ++i)
+      for (i = 0; i < max_pollfd; ++i)
 	{
 	  my_pollfd[i].fd = svc_pollfd[i].fd;
 	  my_pollfd[i].events = svc_pollfd[i].events;
 	  my_pollfd[i].revents = 0;
 	}
 
-      switch (i = __poll (my_pollfd, svc_max_pollfd, -1))
+      switch (i = __poll (my_pollfd, max_pollfd, -1))
 	{
 	case -1:
-	  free (my_pollfd);
 	  if (errno == EINTR)
 	    continue;
 	  perror (_("svc_run: - poll failed"));
-	  return;
+	  break;
 	case 0:
-	  free (my_pollfd);
 	  continue;
 	default:
 	  INTUSE(svc_getreq_poll) (my_pollfd, i);
-	  free (my_pollfd);
+	  continue;
 	}
+      break;
     }
+
+  free (my_pollfd);
 }