From 1b08534e562dae7b084326f8aa8cc12a4c1b6593 Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Thu, 18 Dec 2008 19:35:10 -0800 Subject: net: Fix module refcount leak in kernel_accept() The kernel_accept() does not hold the module refcount of newsock->ops->owner, so we need __module_get(newsock->ops->owner) code after call kernel_accept() by hand. In sunrpc, the module refcount is missing to hold. So this cause kernel panic. Used following script to reproduct: while [ 1 ]; do mount -t nfs4 192.168.0.19:/ /mnt touch /mnt/file umount /mnt lsmod | grep ipv6 done This patch fixed the problem by add __module_get(newsock->ops->owner) to kernel_accept(). So we do not need to used __module_get(newsock->ops->owner) in every place when used kernel_accept(). Signed-off-by: Wei Yongjun Signed-off-by: David S. Miller --- net/socket.c | 1 + 1 file changed, 1 insertion(+) (limited to 'net/socket.c') diff --git a/net/socket.c b/net/socket.c index 92764d836891..76ba80aeac1a 100644 --- a/net/socket.c +++ b/net/socket.c @@ -2307,6 +2307,7 @@ int kernel_accept(struct socket *sock, struct socket **newsock, int flags) } (*newsock)->ops = sock->ops; + __module_get((*newsock)->ops->owner); done: return err; -- cgit v1.2.3-58-ga151