diff options
| -rw-r--r-- | sys/kern/sys_pipe.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/sys/kern/sys_pipe.c b/sys/kern/sys_pipe.c index 57d8ad74530..1df0c0e4dd3 100644 --- a/sys/kern/sys_pipe.c +++ b/sys/kern/sys_pipe.c @@ -1,4 +1,4 @@ -/* $OpenBSD: sys_pipe.c,v 1.90 2019/07/09 15:02:15 semarie Exp $ */ +/* $OpenBSD: sys_pipe.c,v 1.91 2019/07/13 06:51:59 semarie Exp $ */ /* * Copyright (c) 1996 John S. Dyson @@ -460,7 +460,8 @@ pipe_write(struct file *fp, struct uio *uio, int fflags) npipe = atomic_inc_int_nv(&nbigpipe); if ((npipe <= LIMITBIGPIPES) && (error = pipelock(wpipe)) == 0) { - if (pipespace(wpipe, BIG_PIPE_SIZE) != 0) + if ((wpipe->pipe_buffer.cnt != 0) || + (pipespace(wpipe, BIG_PIPE_SIZE) != 0)) atomic_dec_int(&nbigpipe); pipeunlock(wpipe); } else |