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Bugzilla: 1099761
Upstream-status: 3.16 and CC'd for stable
From a914722f333b3359d2f4f12919380a334176bb89 Mon Sep 17 00:00:00 2001
From: Mateusz Guzik <mguzik@redhat.com>
Date: Tue, 10 Jun 2014 12:44:12 +0200
Subject: [PATCH] NFS: populate ->net in mount data when remounting
Otherwise the kernel oopses when remounting with IPv6 server because
net is dereferenced in dev_get_by_name.
Use net ns of current thread so that dev_get_by_name does not operate on
foreign ns. Changing the address is prohibited anyway so this should not
affect anything.
Signed-off-by: Mateusz Guzik <mguzik@redhat.com>
Cc: linux-nfs@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: stable@vger.kernel.org # 3.4+
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---
fs/nfs/super.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 1a6d7ac9d9d2..084af1060d79 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -2260,6 +2260,7 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data)
data->nfs_server.addrlen = nfss->nfs_client->cl_addrlen;
data->version = nfsvers;
data->minorversion = nfss->nfs_client->cl_minorversion;
+ data->net = current->nsproxy->net_ns;
memcpy(&data->nfs_server.address, &nfss->nfs_client->cl_addr,
data->nfs_server.addrlen);
--
1.9.3
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