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Tom Herbert 7ced95ef52 kcm: Add memory limit for receive message construction 
Message assembly is performed on the TCP socket. This is logically
equivalent of an application that performs a peek on the socket to find
out how much memory is needed for a receive buffer. The receive socket
buffer also provides the maximum message size which is checked.

The receive algorithm is something like:

   1) Receive the first skbuf for a message (or skbufs if multiple are
      needed to determine message length).
   2) Check the message length against the number of bytes in the TCP
      receive queue (tcp_inq()).
	- If all the bytes of the message are in the queue (incluing the
	  skbuf received), then proceed with message assembly (it should
	  complete with the tcp_read_sock)
        - Else, mark the psock with the number of bytes needed to
	  complete the message.
   3) In TCP data ready function, if the psock indicates that we are
      waiting for the rest of the bytes of a messages, check the number
      of queued bytes against that.
        - If there are still not enough bytes for the message, just
	  return
        - Else, clear the waiting bytes and proceed to receive the
	  skbufs.  The message should now be received in one
	  tcp_read_sock

Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2016-03-09 16:36:15 -05:00
..
6lowpan 6lowpan: iphc: fix invalid case handling 2016-02-26 09:08:15 +01:00
9p Rework and error handling fixes, primarily in the fscatch and fd transports. 2016-01-24 12:39:09 -08:00
802
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8021q net: 8021q: use __ethtool_get_ksettings 2016-02-25 22:06:46 -05:00
appletalk appletalk: fix erroneous return value 2016-02-18 14:59:34 -05:00
atm net: Generalise wq_has_sleeper helper 2015-11-30 14:47:33 -05:00
ax25 net: add validation for the socket syscall protocol argument 2015-12-14 16:09:30 -05:00
batman-adv batman-adv: clarify CFG80211 dependency 2016-03-02 13:45:47 -05:00
bluetooth Bluetooth: hci_core: cancel power off delayed work properly 2016-02-23 20:29:38 +01:00
bridge Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next 2016-03-08 14:25:20 -05:00
caif net: caif: fix erroneous return value 2016-02-18 14:59:35 -05:00
can can: avoid using timeval for uapi 2015-10-13 17:42:34 +02:00
ceph libceph: don't spam dmesg with stray reply warnings 2016-02-24 20:28:51 +01:00
core net: Walk fragments in __skb_splice_bits 2016-03-09 16:36:14 -05:00
dcb net/dcb: make dcbnl.c explicitly non-modular 2015-10-09 07:52:27 -07:00
dccp Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-02-23 00:09:14 -05:00
decnet net: add validation for the socket syscall protocol argument 2015-12-14 16:09:30 -05:00
dns_resolver net: dns_resolver: convert time_t to time64_t 2015-11-18 16:27:46 -05:00
dsa net: dsa: support VLAN filtering switchdev attr 2016-03-01 16:24:51 -05:00
ethernet eth: Pull header from first fragment via eth_get_headlen 2016-02-24 13:58:05 -05:00
hsr net/hsr: fix a warning message 2015-11-23 14:56:15 -05:00
ieee802154 ieee802154: 6lowpan: fix return of netdev notifier 2016-02-23 20:29:40 +01:00
ipv4 tcp: Add tcp_inq to get available receive bytes on socket 2016-03-09 16:36:14 -05:00
ipv6 ipv6: per netns FIB garbage collection 2016-03-08 15:16:51 -05:00
ipx net: Pass kern from net_proto_family.create to sk_alloc 2015-05-11 10:50:17 -04:00
irda irda: fix a potential use-after-free in ircomm_param_request 2016-01-29 22:56:46 -08:00
iucv af_iucv: Validate socket address length in iucv_sock_bind() 2016-01-19 14:21:08 -05:00
kcm kcm: Add memory limit for receive message construction 2016-03-09 16:36:15 -05:00
key af_key: fix two typos 2015-10-23 03:05:19 -07:00
l2tp Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-02-23 00:09:14 -05:00
l3mdev net: l3mdev: address selection should only consider devices in L3 domain 2016-02-26 14:22:26 -05:00
lapb
…
llc af_llc: fix types on llc_ui_wait_for_conn 2016-02-17 16:12:13 -05:00
mac80211 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-03-08 12:34:12 -05:00
mac802154 mac802154: Fixes kernel oops when unloading a radio driver 2016-02-23 20:29:40 +01:00
mpls mpls: autoload lwt module 2016-02-21 22:00:28 -05:00
netfilter Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next 2016-03-08 14:25:20 -05:00
netlabel netlabel: do not initialise statics to NULL 2016-03-07 11:08:26 -05:00
netlink nfnetlink: Revert "nfnetlink: add support for memory mapped netlink" 2016-02-18 11:42:22 -05:00
netrom netfilter: Remove spurios included of netfilter.h 2015-06-18 21:14:32 +02:00
nfc NFC 4.5 pull request 2016-01-04 21:48:15 -05:00
openvswitch ovs: propagate per dp max headroom to all vports 2016-03-01 15:54:30 -05:00
packet net: core: use __ethtool_get_ksettings 2016-02-25 22:06:47 -05:00
phonet sock: struct proto hash function may error 2016-02-11 03:54:14 -05:00
rds RDS: IB: Support Fastreg MR (FRMR) memory registration mode 2016-03-02 14:13:19 -05:00
rfkill Here's another round of updates for -next: 2016-03-01 17:03:27 -05:00
rose Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-06-24 02:58:51 -07:00
rxrpc rxrpc: Don't try to map ICMP to error as the lower layer already did that 2016-03-04 16:02:03 +00:00
sched net_sched: dsmark: use qdisc_dequeue_peeked() 2016-03-08 14:35:13 -05:00
sctp Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-03-08 12:34:12 -05:00
sunrpc One fix for a bug that could cause a NULL write past the end of a buffer 2016-02-25 19:31:01 -08:00
switchdev net: ndo_fdb_dump should report -EMSGSIZE to rtnl_fdb_dump. 2016-02-26 15:04:02 -05:00
tipc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-03-08 12:34:12 -05:00
unix Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-02-23 00:09:14 -05:00
vmw_vsock vsock: Fix blocking ops call in prepare_to_wait 2016-02-13 05:57:39 -05:00
wimax net:wimax: Fix doucble word "the the" in networking.xml 2015-08-09 22:43:52 -07:00
wireless Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-03-08 12:34:12 -05:00
x25 net: Pass kern from net_proto_family.create to sk_alloc 2015-05-11 10:50:17 -04:00
xfrm net: preserve IP control block during GSO segmentation 2016-01-15 14:35:24 -05:00
Kconfig kcm: Kernel Connection Multiplexor module 2016-03-09 16:36:14 -05:00
Makefile kcm: Kernel Connection Multiplexor module 2016-03-09 16:36:14 -05:00
compat.c net: switch importing msghdr from userland to {compat_,}import_iovec() 2015-04-09 00:02:26 -04:00
socket.c net: Add MSG_BATCH flag 2016-03-09 16:36:13 -05:00
sysctl_net.c net: sysctl: fix a kmemleak warning 2015-10-23 06:22:08 -07:00