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linux/net
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Jon Paul Maloy d482994fca tipc: fix two bugs in secondary destination lookup 
A message sent to a node after a successful name table lookup may still
find that the destination socket has disappeared, because distribution
of name table updates is non-atomic. If so, the message will be rejected
back to the sender with error code TIPC_ERR_NO_PORT. If the source
socket of the message has disappeared in the meantime, the message
should be dropped.

However, in the currrent code, the message will instead be subject to an
unwanted tertiary lookup, because the function tipc_msg_lookup_dest()
doesn't check if there is an error code present in the message before
performing the lookup. In the worst case, the message may now find the
old destination again, and be redirected once more, instead of being
dropped directly as it should be.

A second bug in this function is that the "prev_node" field in the message
is not updated after successful lookup, something that may have
unpredictable consequences.

The problems arising from those bugs occur very infrequently.

The third change in this function; the test on msg_reroute_msg_cnt() is
purely cosmetic, reflecting that the returned value never can be negative.

This commit corrects the two bugs described above.

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29 13:47:36 -07:00
..
6lowpan 6lowpan: nhc: add other known rfc6282 compressions 2015-02-14 23:08:44 +01:00
9p Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-03-20 18:51:09 -04:00
802 net: Kill dev_rebuild_header 2015-03-02 16:43:41 -05:00
8021q vlan: Add features for stacked vlan device 2015-03-29 13:33:21 -07:00
appletalk appletalk: Use eth_<foo>_addr instead of memset 2015-03-03 17:01:37 -05:00
atm atm: Use eth_<foo>_addr instead of memset 2015-03-03 17:01:37 -05:00
ax25 ax25: Fix the build when CONFIG_INET is disabled 2015-03-05 13:17:39 -05:00
batman-adv batman-adv: Fix use of seq_has_overflowed() 2015-02-22 17:00:08 -05:00
bluetooth Bluetooth: Fix potential NULL dereference in SMP channel setup 2015-03-18 08:30:03 +02:00
bridge Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next 2015-03-23 22:02:46 -04:00
caif Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-03-20 18:51:09 -04:00
can Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-03-09 23:38:02 -04:00
ceph Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client 2015-02-19 14:14:42 -08:00
core net: Introduce passthru_features_check 2015-03-29 13:33:22 -07:00
dcb net/dcb: Add IEEE QCN attribute 2015-03-06 21:50:02 -05:00
dccp inet: fix double request socket freeing 2015-03-23 21:40:48 -04:00
decnet net: Remove protocol from struct dst_ops 2015-03-09 16:06:10 -04:00
dns_resolver Merge commit 'v3.16' into next 2014-10-01 00:44:04 +10:00
dsa net: dsa: Add basic framework to support ndo_fdb functions 2015-03-29 13:23:54 -07:00
ethernet ethernet: Use eth_<foo>_addr instead of memset 2015-03-03 17:01:38 -05:00
hsr net/hsr: Fix NULL pointer dereference and refcnt bugs when deleting a HSR interface. 2015-03-01 13:40:23 -05:00
ieee802154 ieee802154: don't export static symbol 2015-03-14 17:11:31 +01:00
ipv4 Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next 2015-03-29 12:43:43 -07:00
ipv6 Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next 2015-03-29 12:43:43 -07:00
ipx net: Remove iocb argument from sendmsg and recvmsg 2015-03-02 13:06:31 -05:00
irda Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-03-09 23:38:02 -04:00
iucv net: Remove iocb argument from sendmsg and recvmsg 2015-03-02 13:06:31 -05:00
key net: Remove iocb argument from sendmsg and recvmsg 2015-03-02 13:06:31 -05:00
l2tp l2tp: Use eth_<foo>_addr instead of memset 2015-03-03 17:01:38 -05:00
lapb lapb: move EXPORT_SYMBOL after functions. 2014-10-24 15:51:42 -04:00
llc net: Remove iocb argument from sendmsg and recvmsg 2015-03-02 13:06:31 -05:00
mac80211 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-03-20 18:51:09 -04:00
mac802154 mac802154: fix typo in header guard 2015-03-19 15:32:22 +01:00
mpls mpls: In mpls_egress verify the packet length. 2015-03-12 23:05:04 -04:00
netfilter Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next 2015-03-29 12:43:43 -07:00
netlabel Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2015-02-11 20:25:11 -08:00
netlink rhashtable: provide len to obj_hashfn 2015-03-25 17:18:33 +01:00
netrom net: Kill dev_rebuild_header 2015-03-02 16:43:41 -05:00
nfc net: Remove iocb argument from sendmsg and recvmsg 2015-03-02 13:06:31 -05:00
openvswitch net: Introduce possible_net_t 2015-03-12 14:39:40 -04:00
packet af_packet: pass checksum validation status to the user 2015-03-23 22:01:28 -04:00
phonet net: Remove iocb argument from sendmsg and recvmsg 2015-03-02 13:06:31 -05:00
rds Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-03-20 18:51:09 -04:00
rfkill Last round of updates for net-next: 2015-02-04 14:57:45 -08:00
rose net: Kill dev_rebuild_header 2015-03-02 16:43:41 -05:00
rxrpc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-03-20 18:51:09 -04:00
sched act_bpf: add initial eBPF support for actions 2015-03-20 19:10:44 -04:00
sctp sctp: avoid to repeatedly declare external variables 2015-03-25 11:40:16 -04:00
sunrpc sunrpc: fix braino in ->poll() 2015-03-08 12:53:46 -07:00
switchdev switchdev: fix stp update API to work with layered netdevices 2015-03-23 16:44:56 -04:00
tipc tipc: fix two bugs in secondary destination lookup 2015-03-29 13:47:36 -07:00
unix net: Remove iocb argument from sendmsg and recvmsg 2015-03-02 13:06:31 -05:00
vmw_vsock net: Remove iocb argument from sendmsg and recvmsg 2015-03-02 13:06:31 -05:00
wimax wimax: convert printk to pr_foo() 2014-10-07 20:28:44 -04:00
wireless Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-03-20 18:51:09 -04:00
x25 net: Remove iocb argument from sendmsg and recvmsg 2015-03-02 13:06:31 -05:00
xfrm Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec 2015-03-16 16:16:49 -04:00
compat.c net: socket: add support for async operations 2015-03-23 16:41:36 -04:00
Kconfig kconfig: use bool instead of boolean for type definition attributes 2015-01-07 13:08:04 +01:00
Makefile mpls: Refactor how the mpls module is built 2015-03-04 00:26:06 -05:00
socket.c net: socket: add support for async operations 2015-03-23 16:41:36 -04:00
sysctl_net.c