1 files changed, 5 insertions, 3 deletions

diff --git a/channels.c b/channels.c
index 19da16eb3..657381b80 100644
--- a/channels.c
+++ b/channels.c
@@ -2100,16 +2100,18 @@ channel_handle_efd_read(struct ssh *ssh, Channel *c,
     fd_set *readset, fd_set *writeset)
 {
         char buf[CHAN_RBUF];
-        int r;
         ssize_t len;
+        int r, force;
+
+        force = c->isatty && c->detach_close && c->istate != CHAN_INPUT_CLOSED;
 
-        if (!c->detach_close && !FD_ISSET(c->efd, readset))
+        if (c->efd == -1 || (!force && !FD_ISSET(c->efd, readset)))
                 return 1;
 
         len = read(c->efd, buf, sizeof(buf));
         debug2("channel %d: read %zd from efd %d", c->self, len, c->efd);
         if (len < 0 && (errno == EINTR || ((errno == EAGAIN ||
-            errno == EWOULDBLOCK) && !c->detach_close)))
+            errno == EWOULDBLOCK) && !force)))
                 return 1;
         if (len <= 0) {
                 debug2("channel %d: closing read-efd %d",