From 7512cbf6efc97644812f137527a54b8e92b6a90a Mon Sep 17 00:00:00 2001 From: Pavel Emelyanov Date: Fri, 21 Mar 2008 15:58:52 -0700 Subject: [PATCH] [DLCI]: Fix tiny race between module unload and sock_ioctl. This is a narrow pedantry :) but the dlci_ioctl_hook check and call should not be parted with the mutex lock. Signed-off-by: Pavel Emelyanov Signed-off-by: David S. Miller --- net/socket.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/net/socket.c b/net/socket.c index b6d35cd..9d3fbfb 100644 --- a/net/socket.c +++ b/net/socket.c @@ -909,11 +909,10 @@ static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) if (!dlci_ioctl_hook) request_module("dlci"); - if (dlci_ioctl_hook) { - mutex_lock(&dlci_ioctl_mutex); + mutex_lock(&dlci_ioctl_mutex); + if (dlci_ioctl_hook) err = dlci_ioctl_hook(cmd, argp); - mutex_unlock(&dlci_ioctl_mutex); - } + mutex_unlock(&dlci_ioctl_mutex); break; default: err = sock->ops->ioctl(sock, cmd, arg); -- 2.7.4