From 102638407ca0400fd7bbf52244d9c6a7f7f023b9 Mon Sep 17 00:00:00 2001
From: Seigo Tanimura <tanimura@FreeBSD.org>
Date: Tue, 21 May 2002 02:37:56 +0000
Subject: [PATCH] Lock the writer socket across sorwakeup(fip->fi_writesock).

Spotted by:	peter
---
 sys/fs/fifofs/fifo_vnops.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sys/fs/fifofs/fifo_vnops.c b/sys/fs/fifofs/fifo_vnops.c
index 71ba03ce2cd5..449487160afa 100644
--- a/sys/fs/fifofs/fifo_vnops.c
+++ b/sys/fs/fifofs/fifo_vnops.c
@@ -224,11 +224,13 @@ fifo_open(ap)
 		if (fip->fi_writers == 1) {
 			SOCK_LOCK(fip->fi_readsock);
 			fip->fi_readsock->so_state &= ~SS_CANTRCVMORE;
+			SOCK_UNLOCK(fip->fi_readsock);
 			if (fip->fi_readers > 0) {
 				wakeup((caddr_t)&fip->fi_readers);
+				SOCK_LOCK(fip->fi_writesock);
 				sorwakeup(fip->fi_writesock);
+				SOCK_UNLOCK(fip->fi_writesock);
 			}
-			SOCK_UNLOCK(fip->fi_readsock);
 		}
 	}
 	if ((ap->a_mode & FREAD) && (ap->a_mode & O_NONBLOCK) == 0) {