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authorWei Yongjun <yjwei@cn.fujitsu.com>2008-12-19 06:35:10 +0300
committerDavid S. Miller <davem@davemloft.net>2008-12-19 06:35:10 +0300
commit1b08534e562dae7b084326f8aa8cc12a4c1b6593 (patch)
tree9fcc3093d7002015d334a28b0b0e21527ed5dcf7 /net/socket.c
parent3298a7388c00227e736d1037328788073c80c7b4 (diff)
downloadlinux-1b08534e562dae7b084326f8aa8cc12a4c1b6593.tar.xz
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 <yjwei@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/socket.c')
-rw-r--r--net/socket.c1
1 files changed, 1 insertions, 0 deletions
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;