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Stanislav Kinsbursky 34ef215eed nfsd: check passed socket's net matches NFSd superblock's one 
commit 3064639423 upstream.

There could be a case, when NFSd file system is mounted in network, different
to socket's one, like below:

"ip netns exec" creates new network and mount namespace, which duplicates NFSd
mount point, created in init_net context. And thus NFS server stop in nested
network context leads to RPCBIND client destruction in init_net.
Then, on NFSd start in nested network context, rpc.nfsd process creates socket
in nested net and passes it into "write_ports", which leads to RPCBIND sockets
creation in init_net context because of the same reason (NFSd monut point was
created in init_net context). An attempt to register passed socket in nested
net leads to panic, because no RPCBIND client present in nexted network
namespace.

This patch add check that passed socket's net matches NFSd superblock's one.
And returns -EINVAL error to user psace otherwise.

v2: Put socket on exit.

Reported-by: Weng Meiling <wengmeiling.weng@huawei.com>
Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2014-05-06 07:59:28 -07:00
..
9p 9p/trans_virtio.c: Fix broken zero-copy on vmalloc() buffers 2014-02-10 17:48:54 -08:00
802 neigh: use NEIGH_VAR_INIT in ndo_neigh_setup functions. 2014-01-16 11:31:58 -08:00
8021q vlan: Warn the user if lowerdev has bad vlan features. 2014-03-28 17:16:51 -04:00
appletalk net: Fix some fallout from the etner_addr_copy() changes. 2014-01-21 18:57:26 -08:00
atm net: Fix some fallout from the etner_addr_copy() changes. 2014-01-21 18:57:26 -08:00
ax25 net: add build-time checks for msg->msg_name size 2014-01-18 23:04:16 -08:00
batman-adv batman-adv: fix potential kernel paging error for unicast transmissions 2014-02-17 17:17:02 +01:00
bluetooth Bluetooth: Fix removing Long Term Key 2014-04-26 17:19:04 -07:00
bridge bridge: Fix crash with vlan filtering and tcpdump 2014-03-28 17:14:02 -04:00
caif net: Include appropriate header file in caif/cfsrvl.c 2014-02-09 17:32:49 -08:00
can can: remove CAN FD compatibility for CAN 2.0 sockets 2014-03-03 14:29:52 +01:00
ceph libceph: do not dereference a NULL bio pointer 2014-02-07 11:37:07 -08:00
core net: Account for all vlan headers in skb_mac_gso_segment 2014-03-28 17:10:36 -04:00
dcb dcb: use __dev_get_by_name instead of dev_get_by_name to find interface 2014-01-14 18:50:46 -08:00
dccp dccp: re-enable debug macro 2014-02-16 23:45:00 -05:00
decnet net: Move prototype declaration to header file include/net/dn.h from net/decnet/af_decnet.c 2014-02-09 17:32:49 -08:00
dns_resolver
…
dsa dsa: Use ether_addr_copy 2014-01-21 18:13:05 -08:00
ethernet net: eth_type_trans() should use skb_header_pointer() 2014-01-16 15:30:31 -08:00
hsr hsr: off by one sanity check in hsr_register_frame_in() 2014-03-03 15:29:42 -05:00
ieee802154 6lowpan: fix lockdep splats 2014-02-10 17:51:29 -08:00
ipv4 tcp: fix get_timewait4_sock() delay computation on 64bit 2014-03-28 16:43:14 -04:00
ipv6 ipv6: some ipv6 statistic counters failed to disable bh 2014-04-14 06:50:03 -07:00
ipx net: Move prototype declaration to header file include/net/net_namespace.h from net/ipx/af_ipx.c 2014-02-09 17:32:50 -08:00
irda net: add build-time checks for msg->msg_name size 2014-01-18 23:04:16 -08:00
iucv
…
key selinux: add gfp argument to security_xfrm_policy_alloc and fix callers 2014-03-10 08:30:02 +01:00
l2tp l2tp: fix userspace reception on plain L2TP sockets 2014-03-06 14:25:39 -05:00
lapb
…
llc llc: remove noisy WARN from llc_mac_hdr_init 2014-01-28 18:01:32 -08:00
mac80211 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless into for-davem 2014-03-07 15:09:32 -05:00
mac802154
…
mpls
…
netfilter core, nfqueue, openvswitch: Orphan frags in skb_zerocopy and handle errors 2014-03-27 15:29:38 -04:00
netlabel
…
netlink net: Fix permission check in netlink_connect() 2014-02-25 18:35:14 -05:00
netrom net: add build-time checks for msg->msg_name size 2014-01-18 23:04:16 -08:00
nfc NFC: NCI: Fix NULL pointer dereference 2014-02-23 23:14:45 +01:00
openvswitch openvswitch: fix a possible deadlock and lockdep warning 2014-03-28 16:41:53 -04:00
packet af_packet: remove a stray tab in packet_set_ring() 2014-02-18 18:02:25 -05:00
phonet net: add build-time checks for msg->msg_name size 2014-01-18 23:04:16 -08:00
rds rds: prevent dereference of a NULL device in rds_iw_laddr_check 2014-04-14 06:50:04 -07:00
rfkill Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-01-25 11:17:34 -08:00
rose net: add build-time checks for msg->msg_name size 2014-01-18 23:04:16 -08:00
rxrpc RxRPC fixes 2014-01-28 18:04:18 -08:00
sched pkt_sched: fq: do not hold qdisc lock while allocating memory 2014-03-10 16:17:52 -04:00
sctp net: sctp: fix skb leakage in COOKIE ECHO path of chunk->auth_chunk 2014-03-05 20:40:25 -05:00
sunrpc nfsd: check passed socket's net matches NFSd superblock's one 2014-05-06 07:59:28 -07:00
tipc tipc: fix spinlock recursion bug for failed subscriptions 2014-03-24 15:36:56 -04:00
unix net: unix: non blocking recvmsg() should not return -EINTR 2014-03-26 17:05:40 -04:00
vmw_vsock net: add build-time checks for msg->msg_name size 2014-01-18 23:04:16 -08:00
wimax
…
wireless cfg80211: remove racy beacon_interval assignment 2014-03-03 14:18:20 +01:00
x25 net: add build-time checks for msg->msg_name size 2014-01-18 23:04:16 -08:00
xfrm selinux: add gfp argument to security_xfrm_policy_alloc and fix callers 2014-03-10 08:30:02 +01:00
Kconfig
…
Makefile net: move 6lowpan compression code to separate module 2014-01-15 15:36:38 -08:00
compat.c x86, x32: Correct invalid use of user timespec in the kernel 2014-01-30 18:44:13 -08:00
nonet.c
…
socket.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-03-13 20:38:36 -07:00
sysctl_net.c
…