* [PATCH 3.15 39/66] NFS: populate ->net in mount data when remounting
[not found] <20140704221422.813435485@linuxfoundation.org>
@ 2014-07-04 22:14 ` Greg Kroah-Hartman
0 siblings, 0 replies; only message in thread
From: Greg Kroah-Hartman @ 2014-07-04 22:14 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Mateusz Guzik, linux-nfs,
Trond Myklebust
3.15-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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/nfs/super.c | 1 +
1 file changed, 1 insertion(+)
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -2248,6 +2248,7 @@ nfs_remount(struct super_block *sb, int
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);
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