- djm@cvs.openbsd.org 2012/04/11 13:26:40

     [sshd.c]
     don't spin in accept() when out of fds (ENFILE/ENFILE) - back off for a
     while; ok deraadt@ markus@

2 files changed, 9 insertions, 2 deletions

diff --git a/ChangeLog b/ChangeLog
index 7cc59758..f5890757 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -25,6 +25,10 @@
      [auth.c]
      Support "none" as an argument for AuthorizedPrincipalsFile to indicate
      no file should be read.
+   - djm@cvs.openbsd.org 2012/04/11 13:26:40
+     [sshd.c]
+     don't spin in accept() when out of fds (ENFILE/ENFILE) - back off for a
+     while; ok deraadt@ markus@
 
 20120420
  - (djm) [contrib/caldera/openssh.spec contrib/redhat/openssh.spec]
diff --git a/sshd.c b/sshd.c
index b63aaa42..fddbc9d3 100644
--- a/sshd.c
+++ b/sshd.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: sshd.c,v 1.388 2011/09/30 21:22:49 djm Exp $ */
+/* $OpenBSD: sshd.c,v 1.389 2012/04/11 13:26:40 djm Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -1174,7 +1174,10 @@ server_accept_loop(int *sock_in, int *sock_out, int *newsock, int *config_s)
 			if (*newsock < 0) {
 				if (errno != EINTR && errno != EAGAIN &&
 				    errno != EWOULDBLOCK)
-					error("accept: %.100s", strerror(errno));
+					error("accept: %.100s",
+					    strerror(errno));
+				if (errno == EMFILE || errno == ENFILE)
+					usleep(100 * 1000);
 				continue;
 			}
 			if (unset_nonblock(*newsock) == -1) {