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Phil Sutter d6df198d92 net: ipv6: restrict hop_limit sysctl setting to range [1; 255] 
Setting a value bigger than 255 resulted in using only the lower eight
bits of that value as it is assigned to the u8 header field. To avoid
this unexpected result, reject such values.

Setting a value of zero is technically possible, but hosts receiving
such a packet have to treat it like hop_limit was set to one, according
to RFC2460. Therefore I don't see a use-case for that.

Setting a route's hop_limit to zero in iproute2 means to use the sysctl
default, which is not the case here: Setting e.g.
net.conf.eth0.hop_limit=0 will not make the kernel use
net.conf.all.hop_limit for outgoing packets on eth0. To avoid these
kinds of confusion, reject zero.

Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2015-12-03 14:42:10 -05:00
..
6lowpan 6lowpan: put mcast compression in an own function 2015-10-21 00:49:25 +02:00
9p IB/cma: Add support for network namespaces 2015-10-28 12:32:48 -04:00
802
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8021q vlan: Do not put vlan headers back on bridge and macvlan ports 2015-11-17 14:38:35 -05:00
appletalk net: Pass kern from net_proto_family.create to sk_alloc 2015-05-11 10:50:17 -04:00
atm net: Generalise wq_has_sleeper helper 2015-11-30 14:47:33 -05:00
ax25 NET: AX.25: Stop heartbeat timer on disconnect. 2015-07-15 15:59:58 -07:00
batman-adv net: add possibility to pass information about upper device via notifier 2015-12-03 11:49:25 -05:00
bluetooth Bluetooth: Increment management interface revision 2015-11-23 14:13:32 +01:00
bridge net: add possibility to pass information about upper device via notifier 2015-12-03 11:49:25 -05:00
caif net: caif: convert to using IFF_NO_QUEUE 2015-08-18 11:55:07 -07:00
can can: avoid using timeval for uapi 2015-10-13 17:42:34 +02:00
ceph Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client 2015-11-13 09:24:40 -08:00
core net: introduce change lower state notifier 2015-12-03 11:49:26 -05:00
dcb net/dcb: make dcbnl.c explicitly non-modular 2015-10-09 07:52:27 -07:00
dccp net: Generalise wq_has_sleeper helper 2015-11-30 14:47:33 -05:00
decnet Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2015-10-17 14:28:03 +02:00
dns_resolver KEYS: Merge the type-specific data with the payload data 2015-10-21 15:18:36 +01:00
dsa net: dsa: include gpio consumer header file 2015-11-24 11:28:06 -05:00
ethernet net: help compiler generate better code in eth_get_headlen 2015-09-28 22:51:15 -07:00
hsr net: hsr: convert to using IFF_NO_QUEUE 2015-08-18 11:55:07 -07:00
ieee802154 net: fix percpu memory leaks 2015-11-02 22:47:14 -05:00
ipv4 tcp: suppress too verbose messages in tcp_send_ack() 2015-12-02 23:44:32 -05:00
ipv6 net: ipv6: restrict hop_limit sysctl setting to range [1; 255] 2015-12-03 14:42:10 -05:00
ipx net: Pass kern from net_proto_family.create to sk_alloc 2015-05-11 10:50:17 -04:00
irda TTY/Serial driver patches for 4.4-rc1 2015-11-04 21:35:12 -08:00
iucv net: Generalise wq_has_sleeper helper 2015-11-30 14:47:33 -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 2015-10-02 07:21:25 -07:00
l3mdev net: Add netif_is_l3_slave 2015-10-07 04:27:43 -07:00
lapb
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llc tcp: fix recv with flags MSG_WAITALL | MSG_PEEK 2015-07-27 01:06:53 -07:00
mac80211 mac80211: document sleep requirements for channel context ops 2015-11-03 11:15:48 +01:00
mac802154 mac802154: Delete an unnecessary check before the function call "kfree_skb" 2015-11-19 17:50:32 +01:00
mpls mpls: reduce memory usage of routes 2015-10-27 19:52:59 -07:00
netfilter ipvs: use skb_to_full_sk() helper 2015-11-15 18:39:48 -05:00
netlabel
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netlink mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd 2015-11-06 17:50:42 -08:00
netrom netfilter: Remove spurios included of netfilter.h 2015-06-18 21:14:32 +02:00
nfc NFC: nci: non-static functions can not be inline 2015-10-28 06:44:45 +01:00
openvswitch net: add possibility to pass information about upper device via notifier 2015-12-03 11:49:25 -05:00
packet packet: Use PAGE_ALIGNED macro 2015-11-17 15:25:44 -05:00
phonet net: Pass kern from net_proto_family.create to sk_alloc 2015-05-11 10:50:17 -04:00
rds Merge branch 'akpm' (patches from Andrew) 2015-11-07 14:32:45 -08:00
rfkill rfkill: Copy "all" global state to other types 2015-09-04 14:26:56 +02:00
rose Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-06-24 02:58:51 -07:00
rxrpc net: Generalise wq_has_sleeper helper 2015-11-30 14:47:33 -05:00
sched net_sched: em_meta: use skb_to_full_sk() helper 2015-11-08 20:56:39 -05:00
sctp net: Generalise wq_has_sleeper helper 2015-11-30 14:47:33 -05:00
sunrpc Mainly smaller bugfixes and cleanup. We're still finding some bugs from 2015-11-11 20:11:28 -08:00
switchdev switchdev: respect SKIP_EOPNOTSUPP flag in case there is no recursion 2015-11-03 13:39:21 -05:00
tipc net: Generalise wq_has_sleeper helper 2015-11-30 14:47:33 -05:00
unix unix: use wq_has_sleeper in unix_dgram_recvmsg 2015-12-01 14:57:43 -05:00
vmw_vsock VSOCK: constify vmci_transport_notify_ops structures 2015-11-23 15:49:29 -05:00
wimax net:wimax: Fix doucble word "the the" in networking.xml 2015-08-09 22:43:52 -07:00
wireless cfg80211: allow AID/listen interval changes for unassociated station 2015-11-03 11:20:29 +01:00
x25 net: Pass kern from net_proto_family.create to sk_alloc 2015-05-11 10:50:17 -04:00
xfrm Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next 2015-10-30 20:51:56 +09:00
Kconfig net: Introduce L3 Master device abstraction 2015-09-29 20:40:32 -07:00
Makefile net: Introduce L3 Master device abstraction 2015-09-29 20:40:32 -07:00
compat.c
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socket.c net: Drop unlikely before IS_ERR(_OR_NULL) 2015-09-29 15:15:40 +02:00
sysctl_net.c net: sysctl: fix a kmemleak warning 2015-10-23 06:22:08 -07:00