* [PATCH 3.8 072/116] NFS: populate ->net in mount data when remounting
[not found] <1406067727-19683-1-git-send-email-kamal@canonical.com>
@ 2014-07-22 22:21 ` Kamal Mostafa
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From: Kamal Mostafa @ 2014-07-22 22:21 UTC (permalink / raw)
To: linux-kernel, stable, kernel-team
Cc: Mateusz Guzik, linux-nfs, Trond Myklebust, Kamal Mostafa
3.8.13.27 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Mateusz Guzik <mguzik@redhat.com>
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 <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>
---
fs/nfs/super.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index b056b16..f4d000a 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -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);
--
1.9.1
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