Martin KaFai Lau 886b7a5010 ipv6: A few fixes on dereferencing rt->from ... It is a followup after the fix in commit 9c69a13205 ("route: Avoid crash from dereferencing NULL rt->from") rt6_do_redirect(): 1. NULL checking is needed on rt->from because a parallel fib6_info delete could happen that sets rt->from to NULL. (e.g. rt6_remove_exception() and fib6_drop_pcpu_from()). 2. fib6_info_hold() is not enough. Same reason as (1). Meaning, holding dst->__refcnt cannot ensure rt->from is not NULL or rt->from->fib6_ref is not 0. Instead of using fib6_info_hold_safe() which ip6_rt_cache_alloc() is already doing, this patch chooses to extend the rcu section to keep "from" dereference-able after checking for NULL. inet6_rtm_getroute(): 1. NULL checking is also needed on rt->from for a similar reason. Note that inet6_rtm_getroute() is using RTNL_FLAG_DOIT_UNLOCKED. Fixes: a68886a691 ("net/ipv6: Make from in rt6_info rcu protected") Signed-off-by: Martin KaFai Lau <kafai@fb.com> Acked-by: Wei Wang <weiwan@google.com> Reviewed-by: David Ahern <dsahern@gmail.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2019-05-01 17:17:54 -04:00
..
ila	ila: Fix rhashtable walker list corruption	2019-03-27 22:46:16 -07:00
netfilter	netfilter: ip6t_srh: fix NULL pointer dereferences	2019-03-18 16:22:48 +01:00
Kconfig	net: remove blank lines at end of file	2018-07-24 14:10:43 -07:00
Makefile	…
addrconf.c	net: ignore sysctl_devconf_inherit_init_net without SYSCTL	2019-03-04 13:14:34 -08:00
addrconf_core.c	ipv6_stub: add ipv6_route_input stub/proxy.	2019-02-13 18:27:55 -08:00
addrlabel.c	net: ipv6: addrlabel: fix spelling mistake "requewst" -> "request"	2019-04-18 10:44:17 -07:00
af_inet6.c	ipv6_stub: add ipv6_route_input stub/proxy.	2019-02-13 18:27:55 -08:00
ah6.c	…
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.c	esp: Skip TX bytes accounting when sending from a request socket	2019-01-28 11:20:58 +01:00
esp6_offload.c	xfrm: Reset secpath in xfrm failure	2019-03-08 07:32:16 +01:00
exthdrs.c	ipv6: make ipv6_renew_options() interrupt/kernel safe	2018-07-05 20:15:26 +09:00
exthdrs_core.c	net: ipv6: Fix typo in ipv6_find_hdr() documentation	2018-05-07 23:50:27 -04:00
exthdrs_offload.c	…
fib6_notifier.c	…
fib6_rules.c	net/ipv6: Add fib6_lookup	2018-05-11 00:10:56 +02:00
fou6.c	fou, fou6: avoid uninit-value in gue_err() and gue6_err()	2019-03-08 15:19:53 -08:00
icmp.c	ipv6: icmp: use percpu allocation	2019-02-24 21:57:26 -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 races in ip6_dst_destroy()	2019-04-30 23:38:38 -04:00
ip6_flowlabel.c	ipv6/flowlabel: wait rcu grace period before put_pid()	2019-04-29 23:30:13 -04:00
ip6_gre.c	net: ip6_gre: fix possible use-after-free in ip6erspan_rcv	2019-04-08 16:16:47 -07:00
ip6_icmp.c	…
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	gso: validate gso_type on ipip style tunnels	2019-02-20 11:24:27 -08:00
ip6_offload.h	…
ip6_output.c	ipv6: Fix dangling pointer when ipv6 fragment	2019-04-03 21:42:20 -07:00
ip6_tunnel.c	ip6_tunnel: Match to ARPHRD_TUNNEL6 for dev type	2019-04-02 13:19:34 -07:00
ip6_udp_tunnel.c	net/ipv6/udp_tunnel: prefer SO_BINDTOIFINDEX over SO_BINDTODEVICE	2019-01-17 14:55:52 -08:00
ip6_vti.c	ip: validate header length on virtual device xmit	2019-01-01 12:05:02 -08:00
ip6mr.c	ip6mr: Do not call __IP6_INC_STATS() from preemptible context	2019-03-04 10:55:48 -08:00
ipcomp6.c	…
ipv6_sockglue.c	net: ipv6: add socket option IPV6_ROUTER_ALERT_ISOLATE	2019-03-03 21:05:10 -08:00
mcast.c	bridge: join all-snoopers multicast address	2019-01-22 17:18:08 -08:00
mcast_snoop.c	net: remove unneeded switch fall-through	2019-02-21 13:48:00 -08:00
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	Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next	2019-02-18 11:38:30 -08:00
output_core.c	…
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	…
raw.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2018-12-20 11:53:36 -08:00
reassembly.c	net: remove unused struct inet_frag_queue.fragments field	2019-02-26 08:27:05 -08:00
route.c	ipv6: A few fixes on dereferencing rt->from	2019-05-01 17:17:54 -04:00
seg6.c	ipv6: propagate genlmsg_reply return code	2019-02-12 12:36:02 -05:00
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
sit.c	ipv6: sit: reset ip header pointer in ipip6_rcv	2019-04-04 18:34:23 -07:00
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	tcp: do not use ipv6 header for ipv4 flow	2019-03-19 14:00:27 -07:00
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.c	udpv6: Check address length before reading address family	2019-04-12 10:25:03 -07:00
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
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	…
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	xfrm: clean up xfrm protocol checks	2019-03-26 08:35:36 +01:00