Eric Dumazet a1c2f32297 netns: provide pure entropy for net_hash_mix() ... [ Upstream commit 355b985537 ] net_hash_mix() currently uses kernel address of a struct net, and is used in many places that could be used to reveal this address to a patient attacker, thus defeating KASLR, for the typical case (initial net namespace, &init_net is not dynamically allocated) I believe the original implementation tried to avoid spending too many cycles in this function, but security comes first. Also provide entropy regardless of CONFIG_NET_NS. Fixes: 0b4419162a ("netns: introduce the net_hash_mix "salt" for hashes") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Amit Klein <aksecurity@gmail.com> Reported-by: Benny Pinkas <benny@pinkas.net> Cc: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>		2019-04-17 08:38:40 +02:00
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can.h
conntrack.h
core.h
dccp.h
generic.h
hash.h	netns: provide pure entropy for net_hash_mix()	2019-04-17 08:38:40 +02:00
ieee802154_6lowpan.h
ipv4.h	net: ipv4: Control SKB reprioritization after forwarding	2018-08-01 09:52:30 -07:00
ipv6.h	ipv6: Add icmp_echo_ignore_all support for ICMPv6	2018-08-13 08:42:25 -07:00
mib.h
mpls.h
netfilter.h
nftables.h	netfilter: nf_tables: use dedicated mutex to guard transactions	2018-07-18 11:26:48 +02:00
packet.h
sctp.h
unix.h
x_tables.h
xfrm.h