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NFS: populate ->net in mount data when remounting

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commit a914722f33 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 <mguzik@redhat.com>
Cc: linux-nfs@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
This commit is contained in:
Mateusz Guzik
2014-06-10 12:44:12 +02:00
committed by Kamal Mostafa
parent 113b135ebf
commit e6468e9aa0
1 changed files with 1 additions and 0 deletions
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fs/nfs/super.c
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@@ -2167,6 +2167,7 @@ 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,
data->nfs_server.addrlen);