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Daniel Borkmann 4b1c83d8c3 netlink: use jhash as hashfn for rhashtable 
[ Upstream commit 7f19fc5e0b ]

For netlink, we shouldn't be using arch_fast_hash() as a hashing
discipline, but rather jhash() instead.

Since netlink sockets can be opened by any user, a local attacker
would be able to easily create collisions with the DPDK-derived
arch_fast_hash(), which trades off performance for security by
using crc32 CPU instructions on x86_64.

While it might have a legimite use case in other places, it should
be avoided in netlink context, though. As rhashtable's API is very
flexible, we could later on still decide on other hashing disciplines,
if legitimate.

Reference: http://thread.gmane.org/gmane.linux.kernel/1844123
Fixes: e341694e3e ("netlink: Convert netlink_lookup() to use RCU protected hash table")
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2014-12-16 09:39:06 -08:00
..
6lowpan 6lowpan: Allow 6LoWPAN to be modular 2014-08-07 11:44:18 -07:00
9p 9p/trans_virtio: enable VQs early 2014-10-15 10:25:04 +10:30
802 net: set name_assign_type in alloc_netdev() 2014-07-15 16:12:48 -07:00
8021q net: better IFF_XMIT_DST_RELEASE support 2014-10-07 13:22:11 -04:00
appletalk Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-07-16 14:09:34 -07:00
atm net: better IFF_XMIT_DST_RELEASE support 2014-10-07 13:22:11 -04:00
ax25 net: Fix use after free by removing length arg from sk_data_ready callbacks. 2014-04-11 16:15:36 -04:00
batman-adv batman-adv: replace strnicmp with strncasecmp 2014-10-14 02:18:24 +02:00
bluetooth Bluetooth: 6lowpan: Check transmit errors for multicast packets 2014-10-02 13:41:57 +03:00
bridge bridge: Add missing policy entry for IFLA_BRPORT_FAST_LEAVE 2014-11-26 15:29:01 -05:00
caif caif_usb: use target structure member in memset 2014-10-14 16:05:45 -04:00
can can: add hash based access to single EFF frame filters 2014-05-19 09:38:24 +02:00
ceph libceph: change from BUG to WARN for __remove_osd() asserts 2014-11-13 22:26:34 +03:00
core rtnetlink: release net refcnt on error in do_setlink() 2014-11-29 21:05:43 -08:00
dcb dcbnl : Disable software interrupts before taking dcb_lock 2014-11-16 14:50:52 -05:00
dccp Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-10-18 09:31:37 -07:00
decnet af_decnet: Use time_after_eq 2014-08-22 12:23:11 -07:00
dns_resolver Merge commit 'v3.16' into next 2014-10-01 00:44:04 +10:00
dsa net: dsa: slave: Fix autoneg for phys on switch MDIO bus 2014-11-06 15:06:28 -05:00
ethernet net: Add function for parsing the header length out of linear ethernet frames 2014-09-05 17:47:02 -07:00
hsr net/hsr: Remove left-over never-true conditional code. 2014-07-11 15:04:40 -07:00
ieee802154 Merge tag 'master-2014-10-02' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next 2014-10-05 21:34:39 -04:00
ipv4 tcp: fix more NULL deref after prequeue changes 2014-12-16 09:39:05 -08:00
ipv6 tcp: fix more NULL deref after prequeue changes 2014-12-16 09:39:05 -08:00
ipx ipx: fix locking regression in ipx_sendmsg and ipx_recvmsg 2014-11-20 22:57:03 -05:00
irda irda: stop calling sk_prot->disconnect() on connection failure 2014-11-02 10:20:26 -08:00
iucv iucv: Convert pr_warning to pr_warn 2014-09-10 12:40:10 -07:00
key af_key: remove unnecessary break after return 2014-07-15 16:27:00 -07:00
l2tp l2tp: Refactor l2tp core driver to make use of the common UDP tunnel functions 2014-09-19 15:57:15 -04:00
lapb net/lapb: re-send packets on timeout 2013-09-23 16:52:45 -04:00
llc net_dma: simple removal 2014-09-28 07:05:16 -07:00
mac80211 mac80211: minstrel_ht: fix a crash in rate sorting 2014-11-18 22:39:16 +01:00
mac802154 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-10-08 21:40:54 -04:00
mpls mpls: Allow mpls_gso to be built as module 2014-10-31 15:47:21 -04:00
netfilter Revert "netfilter: conntrack: fix race in __nf_conntrack_confirm against get_next_corpse" 2014-11-25 14:14:51 -05:00
netlabel netlabel: kernel-doc warning fix 2014-10-09 01:40:05 -04:00
netlink netlink: use jhash as hashfn for rhashtable 2014-12-16 09:39:06 -08:00
netrom netrom: use linux/uaccess.h 2014-10-17 23:52:54 -04:00
nfc NFC: nci: Add support for proprietary RF Protocols 2014-09-24 02:02:24 +02:00
openvswitch openvswitch: Fix flow mask validation. 2014-12-16 09:39:05 -08:00
packet af_packet: fix sparse warning 2014-11-24 16:15:36 -05:00
phonet net: fix rcu access on phonet_routes 2014-10-06 18:16:30 -04:00
rds Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-10-18 09:31:37 -07:00
rfkill net: rfkill: kernel-doc warning fixes 2014-10-09 11:16:15 +02:00
rose rose: use %*ph specifier 2014-09-07 16:07:25 -07:00
rxrpc Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2014-10-12 10:13:55 -04:00
sched net: fix suspicious rcu_dereference_check in net/sched/sch_fq_codel.c 2014-12-16 09:39:06 -08:00
sctp net: sctp: use MAX_HEADER for headroom reserve in output path 2014-12-16 09:39:05 -08:00
sunrpc SUNRPC: Fix locking around callback channel reply receive 2014-11-19 12:03:20 -05:00
tipc tipc: fix lockdep warning when intra-node messages are delivered 2014-10-21 15:28:15 -04:00
unix af_unix: remove 0 assignment on static 2014-10-07 17:03:14 -04:00
vmw_vsock vsock: Make transport the proto owner 2014-05-05 13:13:50 -04:00
wimax wimax: convert printk to pr_foo() 2014-10-07 20:28:44 -04:00
wireless Here are a few fixes for the wireless stack: one fixes the 2014-10-27 13:38:15 -04:00
x25 net: Fix use after free by removing length arg from sk_data_ready callbacks. 2014-04-11 16:15:36 -04:00
xfrm net: skb_fclone_busy() needs to detect orphaned skb 2014-10-30 19:58:30 -04:00
compat.c net: sendmsg: fix NULL pointer dereference 2014-07-29 12:20:22 -07:00
Kconfig bpf: split eBPF out of NET 2014-10-27 19:09:59 -04:00
Makefile 6lowpan: introduce new net/6lowpan directory 2014-07-12 01:53:30 +02:00
nonet.c llseek: automatically add .llseek fop 2010-10-15 15:53:27 +02:00
socket.c File locking related changes for v3.18 (pile #1) 2014-10-11 13:21:34 -04:00
sysctl_net.c net: Update the sysctl permissions handler to test effective uid/gid 2013-10-07 15:57:56 -04:00