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e75913c93f
linux/net/ipv6
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Zhiqiang Liu e75913c93f net: fix IPv6 prefix route residue 
Follow those steps:
 # ip addr add 2001:123::1/32 dev eth0
 # ip addr add 2001:123:456::2/64 dev eth0
 # ip addr del 2001:123::1/32 dev eth0
 # ip addr del 2001:123:456::2/64 dev eth0
and then prefix route of 2001:123::1/32 will still exist.

This is because ipv6_prefix_equal in check_cleanup_prefix_route
func does not check whether two IPv6 addresses have the same
prefix length. If the prefix of one address starts with another
shorter address prefix, even though their prefix lengths are
different, the return value of ipv6_prefix_equal is true.

Here I add a check of whether two addresses have the same prefix
to decide whether their prefixes are equal.

Fixes: 5b84efecb7 ("ipv6 addrconf: don't cleanup prefix route for IFA_F_NOPREFIXROUTE")
Signed-off-by: Zhiqiang Liu <liuzhiqiang26@huawei.com>
Reported-by: Wenhao Zhang <zhangwenhao8@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-02-11 20:36:50 -08:00
..
ila ila: remove blank lines at EOF 2018-07-24 14:10:42 -07:00
netfilter netfilter: nat: fix spurious connection timeouts 2019-02-11 17:43:17 +01:00
addrconf_core.c net/ipv6: Add helper to return path MTU based on fib result 2018-05-22 10:51:09 +02:00
addrconf.c net: fix IPv6 prefix route residue 2019-02-11 20:36:50 -08:00
addrlabel.c net/ipv6: Update ip6addrlbl_dump for strict data checking 2018-10-08 10:39:05 -07:00
af_inet6.c ipv6: Take rcu_read_lock in __inet6_bind for mapped addresses 2019-01-05 14:17:07 -08:00
ah6.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2017-11-15 11:56:19 -08:00
anycast.c net/ipv6: compute anycast address hash only if dev is null 2018-11-08 17:04:43 -08:00
calipso.c ipv6: make ipv6_renew_options() interrupt/kernel safe 2018-07-05 20:15:26 +09:00
datagram.c ipv6: fix kernel-infoleak in ipv6_local_error() 2019-01-10 09:36:41 -05:00
esp6_offload.c net: use skb_sec_path helper in more places 2018-12-19 11:21:37 -08:00
esp6.c net: use skb_sec_path helper in more places 2018-12-19 11:21:37 -08:00
exthdrs_core.c net: ipv6: Fix typo in ipv6_find_hdr() documentation 2018-05-07 23:50:27 -04:00
exthdrs_offload.c
exthdrs.c ipv6: make ipv6_renew_options() interrupt/kernel safe 2018-07-05 20:15:26 +09:00
fib6_notifier.c net: Add module reference to FIB notifiers 2017-09-01 20:33:42 -07:00
fib6_rules.c net/ipv6: Add fib6_lookup 2018-05-11 00:10:56 +02:00
fou6.c fou, fou6: do not assume linear skbs 2019-01-15 22:01:31 -08:00
icmp.c ipv6: make icmp6_send() robust against null skb->dev 2019-01-04 13:40:03 -08:00
inet6_connection_sock.c
inet6_hashtables.c net: tcp6: prefer listeners bound to an address 2018-12-14 15:55:20 -08:00
ip6_checksum.c net: udp: fix handling of CHECKSUM_COMPLETE packets 2018-10-24 14:18:16 -07:00
ip6_fib.c ipv6: Fix dump of specific table with strict checking 2019-01-02 20:15:43 -08:00
ip6_flowlabel.c ipv6: fold sockcm_cookie into ipcm6_cookie 2018-07-07 10:58:49 +09:00
ip6_gre.c net: ip6_gre: always reports o_key to userspace 2019-01-30 14:00:02 -08:00
ip6_icmp.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ip6_input.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-12-09 21:43:31 -08:00
ip6_offload.c net: use indirect call wrappers at GRO transport layer 2018-12-15 13:23:02 -08:00
ip6_offload.h
ip6_output.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-12-20 11:53:36 -08:00
ip6_tunnel.c ip: validate header length on virtual device xmit 2019-01-01 12:05:02 -08:00
ip6_udp_tunnel.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-12-20 11:53:36 -08:00
ip6_vti.c ip: validate header length on virtual device xmit 2019-01-01 12:05:02 -08:00
ip6mr.c ip6mr: Fix notifiers call on mroute_clean_tables() 2019-01-27 23:16:07 -08:00
ipcomp6.c
ipv6_sockglue.c ipv6: allow ping to link-local address in VRF 2018-11-07 16:12:39 -08:00
Kconfig net: remove blank lines at end of file 2018-07-24 14:10:43 -07:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mcast_snoop.c
mcast.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-10-19 11:03:06 -07:00
mip6.c
ndisc.c ipv6/ndisc: Preserve IPv6 control buffer if protocol error handlers are called 2018-10-26 15:58:06 -07:00
netfilter.c netfilter: ipv6: Don't preserve original oif for loopback address 2019-02-05 14:10:33 +01:00
output_core.c net: accept UFO datagrams from tuntap and packet 2017-11-24 01:37:35 +09:00
ping.c ipv6: fold sockcm_cookie into ipcm6_cookie 2018-07-07 10:58:49 +09:00
proc.c proc: introduce proc_create_net_single 2018-05-16 07:24:30 +02:00
protocol.c net: Add sysctl to toggle early demux for tcp and udp 2017-03-24 13:17:07 -07:00
raw.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-12-20 11:53:36 -08:00
reassembly.c ipv6: fix typo in net/ipv6/reassembly.c 2018-12-30 13:02:46 -08:00
route.c ipv6: route: place a warning with duplicated string with correct extack 2019-01-16 14:06:34 -08:00
seg6_hmac.c Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net 2018-07-03 10:29:26 +09:00
seg6_iptunnel.c ipv6: sr: clear IP6CB(skb) on SRH ip4ip6 encapsulation 2019-01-30 14:06:12 -08:00
seg6_local.c bpf: add End.DT6 action to bpf_lwt_seg6_action helper 2018-07-31 09:22:48 +02:00
seg6.c rhashtable: split rhashtable.h 2018-06-22 13:43:27 +09:00
sit.c sit: check if IPv6 enabled before calling ip6_err_gen_icmpv6_unreach() 2019-02-07 10:48:42 -08:00
syncookies.c net/ipv4: disable SMC TCP option with SYN Cookies 2018-03-25 20:53:54 -04:00
sysctl_net_ipv6.c ipv6: sr: Compute flowlabel for outer IPv6 header of seg6 encap mode 2018-04-25 13:02:15 -04:00
tcp_ipv6.c ipv6: Fix handling of LLA with VRF and sockets bound to VRF 2018-12-15 11:36:14 -08:00
tcpv6_offload.c net: use indirect call wrappers at GRO transport layer 2018-12-15 13:23:02 -08:00
tunnel6.c net: Convert protocol error handlers from void to int 2018-11-08 17:13:08 -08:00
udp_impl.h udp6: add missing rehash callback to udplite 2019-01-17 15:01:08 -08:00
udp_offload.c net: use indirect call wrappers at GRO transport layer 2018-12-15 13:23:02 -08:00
udp.c udp6: add missing rehash callback to udplite 2019-01-17 15:01:08 -08:00
udplite.c udp6: add missing rehash callback to udplite 2019-01-17 15:01:08 -08:00
xfrm6_input.c net: use skb_sec_path helper in more places 2018-12-19 11:21:37 -08:00
xfrm6_mode_beet.c networking: make skb_pull & friends return void pointers 2017-06-16 11:48:39 -04:00
xfrm6_mode_ro.c ipv6: xfrm: use 64-bit timestamps 2018-07-11 15:26:35 +02:00
xfrm6_mode_transport.c xfrm: reset transport header back to network header after all input transforms ahave been applied 2018-09-04 10:26:30 +02:00
xfrm6_mode_tunnel.c xfrm: Verify MAC header exists before overwriting eth_hdr(skb)->h_proto 2018-03-07 10:54:29 +01:00
xfrm6_output.c xfrm6: call kfree_skb when skb is toobig 2018-09-03 07:37:57 +02:00
xfrm6_policy.c xfrm6: remove BUG_ON from xfrm6_dst_ifdown 2018-11-22 07:55:48 +01:00
xfrm6_protocol.c net: Convert protocol error handlers from void to int 2018-11-08 17:13:08 -08:00
xfrm6_state.c xfrm: remove VLA usage in __xfrm6_sort() 2018-04-26 07:51:48 +02:00
xfrm6_tunnel.c xfrm6_tunnel: Fix spi check in __xfrm6_tunnel_alloc_spi 2018-12-19 12:33:17 +01:00