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Date:	Fri, 18 Jul 2014 14:10:42 +0200
From:	Jiri Slaby <>
Cc:, Mateusz Guzik <>,,
	Trond Myklebust <>,
	Jiri Slaby <>
Subject: [PATCH 3.12 037/170] NFS: populate ->net in mount data when remounting

From: Mateusz Guzik <>

3.12-stable review patch.  If anyone has any objections, please let me know.


commit a914722f333b3359d2f4f12919380a334176bb89 upstream.

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 <>
Signed-off-by: Trond Myklebust <>
Signed-off-by: Jiri Slaby <>
 fs/nfs/super.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index a03b9c6f9489..64940b5286db 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -2197,6 +2197,7 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data)
 	data->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ;
 	data->nfs_server.port = nfss->port;
 	data->nfs_server.addrlen = nfss->nfs_client->cl_addrlen;
+	data->net = current->nsproxy->net_ns;
 	memcpy(&data->nfs_server.address, &nfss->nfs_client->cl_addr,

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