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David Howells f206038742 rxrpc: Fix several cases where a padded len isn't checked in ticket decode 
commit 5f2f97656a upstream.

This fixes CVE-2017-7482.

When a kerberos 5 ticket is being decoded so that it can be loaded into an
rxrpc-type key, there are several places in which the length of a
variable-length field is checked to make sure that it's not going to
overrun the available data - but the data is padded to the nearest
four-byte boundary and the code doesn't check for this extra.  This could
lead to the size-remaining variable wrapping and the data pointer going
over the end of the buffer.

Fix this by making the various variable-length data checks use the padded
length.

Reported-by: 石磊 <shilei-c@360.cn>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Marc Dionne <marc.c.dionne@auristor.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2017-06-29 13:00:31 +02:00
..
6lowpan 6lowpan: ndisc: no overreact if no short address is available 2016-09-19 20:19:34 +02:00
9p p9_client_readdir() fix 2017-05-03 08:36:38 -07:00
802 net: Kill dev_rebuild_header 2015-03-02 16:43:41 -05:00
8021q net: add recursion limit to GRO 2016-10-20 14:32:22 -04:00
appletalk appletalk: use IS_ENABLED() instead of checking for built-in or module 2016-09-10 21:19:10 -07:00
atm lec: use IS_ENABLED() instead of checking for built-in or module 2016-09-10 21:19:10 -07:00
ax25 ax25: Fix segfault after sock connection timeout 2017-02-04 09:47:09 +01:00
batman-adv batman-adv: Check for alloc errors when preparing TT local data 2016-12-02 10:46:59 +01:00
bluetooth Bluetooth: Fix user channel for 32bit userspace on 64bit kernel 2017-05-20 14:28:41 +02:00
bridge net: bridge: start hello timer only if device is up 2017-06-14 15:05:52 +02:00
caif net: caif: remove ineffective check 2016-12-05 14:48:48 -05:00
can can: Fix kernel panic at security_sock_rcv_skb 2017-02-18 15:11:40 +01:00
ceph libceph: force GFP_NOIO for socket allocations 2017-04-08 09:30:30 +02:00
core ethtool: do not vzalloc(0) on registers dump 2017-06-17 06:41:51 +02:00
dcb net: dcb: set error code on failures 2016-12-03 23:54:25 -05:00
dccp ipv6/dccp: do not inherit ipv6_mc_list from parent 2017-06-07 12:07:42 +02:00
decnet net: fix decnet rtnexthop parsing 2016-07-05 14:08:47 -07:00
dns_resolver KEYS: Add a facility to restrict new links into a keyring 2016-04-11 22:37:37 +01:00
dsa net: dsa: Do not destroy invalid network devices 2017-02-18 15:11:43 +01:00
ethernet net: introduce device min_header_len 2017-02-18 15:11:43 +01:00
hsr net/hsr: Remove unused but set variable 2016-10-18 10:28:18 -04:00
ieee802154 ieee802154: 6lowpan: fix intra pan id check 2016-07-08 13:23:12 +02:00
ipv4 NET: Fix /proc/net/arp for AX.25 2017-06-17 06:41:50 +02:00
ipv6 ila_xlat: add missing hash secret initialization 2017-06-24 07:11:12 +02:00
ipx ipx: call ipxitf_put() in ioctl error path 2017-05-25 15:44:41 +02:00
irda irda: Fix lockdep annotations in hashbin_delete(). 2017-02-26 11:10:51 +01:00
iucv net/af_iucv: don't use paged skbs for TX on HiperSockets 2017-01-19 20:18:04 +01:00
kcm kcm: return immediately after copy_from_user() failure 2017-05-03 08:36:34 -07:00
key af_key: fix two typos 2015-10-23 03:05:19 -07:00
l2tp l2tp: fix PPP pseudo-wire auto-loading 2017-05-03 08:36:35 -07:00
l3mdev net: ipv6: Remove l3mdev_get_saddr6 2016-09-10 23:12:53 -07:00
lapb net/lapb: tuse %*ph to dump buffers 2016-05-29 22:33:25 -07:00
llc net/llc: avoid BUG_ON() in skb_orphan() 2017-02-26 11:10:50 +01:00
mac80211 mac80211: don't send SMPS action frame in AP mode when not needed 2017-06-24 07:11:14 +02:00
mac802154 mac802154: use rate limited warnings for malformed frames 2016-09-19 20:19:34 +02:00
mpls mpls: Do not decrement alive counter for unregister events 2017-03-22 12:43:34 +01:00
ncsi net/ncsi: Improve HNCDSC AEN handler 2016-10-20 11:23:08 -04:00
netfilter netfilter: nft_log: restrict the log prefix length to 127 2017-06-17 06:41:58 +02:00
netlabel netlabel: Implement CALIPSO config functions for SMACK. 2016-06-27 15:06:18 -04:00
netlink netlink: Do not schedule work from sk_destruct 2016-12-05 19:43:42 -05:00
netrom netfilter: Remove spurios included of netfilter.h 2015-06-18 21:14:32 +02:00
nfc NFC: digital: Fix RTOX supervisor PDU handling 2016-07-11 02:02:03 +02:00
openvswitch openvswitch: Add missing case OVS_TUNNEL_KEY_ATTR_PAD 2017-03-30 09:41:21 +02:00
packet net/packet: fix missing net_device reference release 2017-06-07 12:07:43 +02:00
phonet sock: struct proto hash function may error 2016-02-11 03:54:14 -05:00
qrtr Merge tag 'qcom-soc-for-4.7-2' into net-next 2016-05-17 14:11:19 -04:00
rds RDS: TCP: unregister_netdevice_notifier() in error path of rds_tcp_init_net 2016-12-02 13:29:26 -05:00
rfkill rfkill: Use switch to demux userspace operations 2016-04-05 10:48:53 +02:00
rose rose: limit sk_filter trim to payload 2016-07-13 11:53:40 -07:00
rxrpc rxrpc: Fix several cases where a padded len isn't checked in ticket decode 2017-06-29 13:00:31 +02:00
sched act_connmark: avoid crashing on malformed nlattrs with null parms 2017-03-22 12:43:34 +01:00
sctp sctp: sctp_addr_id2transport should verify the addr before looking up assoc 2017-06-17 06:41:56 +02:00
strparser strparser: destroy workqueue on module exit 2017-03-22 12:43:33 +01:00
sunrpc svcauth_gss: Close connection when dropping an incoming message 2017-04-12 12:41:17 +02:00
switchdev switchdev: Execute bridge ndos only for bridge ports 2016-10-19 10:58:04 -04:00
tipc tipc: fix nametbl_lock soft lockup at node/link events 2017-06-17 06:41:57 +02:00
unix net: unix: properly re-increment inflight counter of GC discarded candidates 2017-03-30 09:41:21 +02:00
vmw_vsock vsock/virtio: fix src/dst cid format 2017-01-09 08:32:23 +01:00
wimax net:wimax: Fix doucble word "the the" in networking.xml 2015-08-09 22:43:52 -07:00
wireless mac80211: strictly check mesh address extension mode 2017-06-24 07:11:13 +02:00
x25 net: x25: remove null checks on arrays calling_ae and called_ae 2016-09-09 18:13:30 -07:00
xfrm xfrm_user: validate XFRM_MSG_NEWAE incoming ESN size harder 2017-03-31 10:31:45 +02:00
compat.c packet: compat support for sock_fprog 2016-06-09 23:41:03 -07:00
Kconfig strparser: Stream parser for messages 2016-08-17 19:36:23 -04:00
Makefile strparser: Stream parser for messages 2016-08-17 19:36:23 -04:00
socket.c net: socket: fix recvmmsg not returning error from sock_error 2017-02-26 11:10:51 +01:00
sysctl_net.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2016-10-06 09:52:23 -07:00