Eric Dumazet 25888e3031 af_unix: limit recursion level ... Its easy to eat all kernel memory and trigger NMI watchdog, using an exploit program that queues unix sockets on top of others. lkml ref : http://lkml.org/lkml/2010/11/25/8 This mechanism is used in applications, one choice we have is to have a recursion limit. Other limits might be needed as well (if we queue other types of files), since the passfd mechanism is currently limited by socket receive queue sizes only. Add a recursion_level to unix socket, allowing up to 4 levels. Each time we send an unix socket through sendfd mechanism, we copy its recursion level (plus one) to receiver. This recursion level is cleared when socket receive queue is emptied. Reported-by: Марк Коренберг <socketpair@gmail.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2010-11-29 09:45:15 -08:00
..
9p	9p: Add datasync to client side TFSYNC/RFSYNC for dotl	2010-10-28 09:08:49 -05:00
bluetooth	Bluetooth: clean up rfcomm code	2010-10-12 12:44:53 -03:00
caif	caif: SPI-driver bugfix - incorrect padding.	2010-11-03 18:50:03 -07:00
irda	net: return operator cleanup	2010-09-23 14:33:39 -07:00
iucv
netfilter	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6	2010-10-23 11:47:02 -07:00
netns	netns: reorder fields in struct net	2010-10-17 13:49:14 -07:00
phonet	Phonet: 'connect' socket implementation for Pipe controller	2010-10-13 14:40:34 -07:00
sctp	net: return operator cleanup	2010-09-23 14:33:39 -07:00
tc_act	net/sched: add ACT_CSUM action to update packets checksums	2010-08-20 01:42:59 -07:00
tipc	tipc: cleanup function namespace	2010-10-16 11:13:24 -07:00
act_api.h	pkt_sched: gen_kill_estimator() rcu fixes	2010-06-11 18:37:08 -07:00
addrconf.h	ipv6: make __ipv6_isatap_ifid static	2010-10-05 00:47:39 -07:00
af_ieee802154.h
af_rxrpc.h
af_unix.h	af_unix: limit recursion level	2010-11-29 09:45:15 -08:00
ah.h
arp.h	arp: remove unnecessary export of arp_broken_ops	2010-09-29 19:45:35 -07:00
atmclip.h
ax25.h
ax88796.h
cfg80211.h	cfg80211: fix WIPHY_FLAG_IBSS_RSN bit	2010-11-15 15:00:42 -05:00
checksum.h
cipso_ipv4.h
cls_cgroup.h	Merge commit 'v2.6.36-rc7' into core/rcu	2010-10-07 09:43:45 +02:00
compat.h
datalink.h
dcbnl.h
dn_dev.h	net: use __packed annotation	2010-06-03 03:21:52 -07:00
dn_fib.h
dn_neigh.h
dn_nsp.h	net: use __packed annotation	2010-06-03 03:21:52 -07:00
dn_route.h	net-next: remove useless union keyword	2010-06-10 23:31:35 -07:00
dn.h	net: avoid limits overflow	2010-11-10 12:12:00 -08:00
dsa.h
dsfield.h
dst_ops.h	b43legacy: Fix compile on ARM architecture	2010-11-15 15:00:42 -05:00
dst.h	ipv4: add __rcu annotations to routes.c	2010-10-27 11:37:31 -07:00
esp.h
ethoc.h
fib_rules.h	fib_rules: __rcu annotates ctarget	2010-10-27 11:37:32 -07:00
flow.h	ipv4: Allow configuring subnets as local addresses	2010-09-28 23:38:15 -07:00
garp.h	net/802: add __rcu annotations	2010-10-25 13:09:44 -07:00
gen_stats.h
genetlink.h	genetlink: introduce pre_doit/post_doit hooks	2010-10-05 13:35:30 -04:00
gre.h	PPTP: PPP over IPv4 (Point-to-Point Tunneling Protocol)	2010-08-21 23:05:39 -07:00
icmp.h
ieee80211_radiotap.h
ieee802154_netdev.h
ieee802154.h
if_inet6.h	ipv6: Replace inet6_ifaddr->dead with state	2010-05-18 15:36:06 -07:00
inet6_connection_sock.h
inet6_hashtables.h
inet_common.h	inet, inet6: make tcp_sendmsg() and tcp_sendpage() through inet_sendmsg() and inet_sendpage()	2010-07-12 20:21:46 -07:00
inet_connection_sock.h	tcp: Add TCP_USER_TIMEOUT socket option.	2010-08-30 13:23:33 -07:00
inet_ecn.h	net: return operator cleanup	2010-09-23 14:33:39 -07:00
inet_frag.h	fragment: add fast path for in-order fragments	2010-06-30 13:44:29 -07:00
inet_hashtables.h	tproxy: fix hash locking issue when using port redirection in __inet_inherit_port()	2010-10-21 13:06:43 +02:00
inet_sock.h	net - IP_NODEFRAG option for IPv4 socket	2010-06-23 13:16:38 -07:00
inet_timewait_sock.h
inetpeer.h	inetpeer: __rcu annotations	2010-10-27 11:37:33 -07:00
ip6_checksum.h
ip6_fib.h	net-next: remove useless union keyword	2010-06-10 23:31:35 -07:00
ip6_route.h
ip6_tunnel.h	tunnels: add _rcu annotations	2010-10-25 13:09:45 -07:00
ip_fib.h	fib: Fix fib zone and its hash leak on namespace stop	2010-10-28 10:27:03 -07:00
ip_vs.h	ipvs: provide address family for debugging	2010-10-21 11:04:43 +02:00
ip.h	ipv4: add __rcu annotations to ip_ra_chain	2010-10-25 14:18:28 -07:00
ipcomp.h
ipconfig.h
ipip.h	tunnels: add __rcu annotations	2010-10-27 11:37:32 -07:00
ipv6.h	net: return operator cleanup	2010-09-23 14:33:39 -07:00
ipx.h	net: use __packed annotation	2010-06-03 03:21:52 -07:00
iw_handler.h
lapb.h
lib80211.h	lib80211: remove unused host_build_iv option	2010-07-26 15:09:04 -04:00
llc_c_ac.h
llc_c_ev.h
llc_c_st.h
llc_conn.h
llc_if.h
llc_pdu.h
llc_s_ac.h
llc_s_ev.h
llc_s_st.h
llc_sap.h
llc.h
mac80211.h	mac80211: add probe request filter flag	2010-10-13 15:45:22 -04:00
mip6.h	net: use __packed annotation	2010-06-03 03:21:52 -07:00
mld.h
ndisc.h	net: use __packed annotation	2010-06-03 03:21:52 -07:00
neighbour.h	net: Fix duplicate volatile warning.	2010-11-18 09:40:04 -08:00
net_namespace.h	net_ns: add __rcu annotations	2010-10-25 14:18:27 -07:00
netdma.h
netevent.h
netlabel.h
netlink.h	netlink: Make nlmsg_find_attr take a const nlmsghdr*.	2010-11-04 12:26:34 -07:00
netrom.h
nexthop.h
nl802154.h
p8022.h
pkt_cls.h
pkt_sched.h	net: Define accessors to manipulate QDISC_STATE_RUNNING	2010-06-02 03:23:51 -07:00
protocol.h	net: add __rcu annotations to protocol	2010-10-27 11:37:31 -07:00
psnap.h
raw.h	include/net/raw.h: Convert raw_seq_private macro to inline	2010-09-08 13:42:22 -07:00
rawv6.h
red.h
regulatory.h	wireless: only use alpha2 regulatory information from country IE	2010-07-20 16:44:35 -04:00
request_sock.h
rose.h
route.h	tproxy: check for transparent flag in ip_route_newports	2010-09-27 15:03:33 -07:00
rtnetlink.h	rtnetlink: remove rtnl_kill_links	2010-10-21 03:09:45 -07:00
sch_generic.h	net_sched: remove the unused parameter of qdisc_create_dflt()	2010-10-21 03:09:47 -07:00
scm.h	scm: Capture the full credentials of the scm sender.	2010-06-16 14:55:56 -07:00
slhc_vj.h
snmp.h	snmp: 64bit ipstats_mib for all arches	2010-06-30 13:31:19 -07:00
sock.h	net: avoid limits overflow	2010-11-10 12:12:00 -08:00
stp.h
tcp_states.h
tcp.h	net: avoid limits overflow	2010-11-10 12:12:00 -08:00
timewait_sock.h
transp_v6.h
udp.h	net: avoid limits overflow	2010-11-10 12:12:00 -08:00
udplite.h
wext.h
wimax.h
wpan-phy.h
x25.h	X25: Move accept approve flag to bitfield	2010-05-17 17:39:27 -07:00
x25device.h
xfrm.h	tunnels: add __rcu annotations	2010-10-27 11:37:32 -07:00