Jonathan Lemon 9c69a13205 route: Avoid crash from dereferencing NULL rt->from ... When __ip6_rt_update_pmtu() is called, rt->from is RCU dereferenced, but is never checked for null - rt6_flush_exceptions() may have removed the entry. [ 1913.989004] RIP: 0010:ip6_rt_cache_alloc+0x13/0x170 [ 1914.209410] Call Trace: [ 1914.214798] <IRQ> [ 1914.219226] __ip6_rt_update_pmtu+0xb0/0x190 [ 1914.228649] ip6_tnl_xmit+0x2c2/0x970 [ip6_tunnel] [ 1914.239223] ? ip6_tnl_parse_tlv_enc_lim+0x32/0x1a0 [ip6_tunnel] [ 1914.252489] ? __gre6_xmit+0x148/0x530 [ip6_gre] [ 1914.262678] ip6gre_tunnel_xmit+0x17e/0x3c7 [ip6_gre] [ 1914.273831] dev_hard_start_xmit+0x8d/0x1f0 [ 1914.283061] sch_direct_xmit+0xfa/0x230 [ 1914.291521] __qdisc_run+0x154/0x4b0 [ 1914.299407] net_tx_action+0x10e/0x1f0 [ 1914.307678] __do_softirq+0xca/0x297 [ 1914.315567] irq_exit+0x96/0xa0 [ 1914.322494] smp_apic_timer_interrupt+0x68/0x130 [ 1914.332683] apic_timer_interrupt+0xf/0x20 [ 1914.341721] </IRQ> Fixes: a68886a691 ("net/ipv6: Make from in rt6_info rcu protected") Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Reviewed-by: David Ahern <dsahern@gmail.com> Reviewed-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2019-04-15 13:31:59 -07:00
..
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	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
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: perform strict checks also for doit handlers	2019-01-19 10:09:59 -08:00
af_inet6.c	ipv6_stub: add ipv6_route_input stub/proxy.	2019-02-13 18:27:55 -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.c	esp: Skip TX bytes accounting when sending from a request socket	2019-01-28 11:20:58 +01:00
esp6_offload.c	net: use skb_sec_path helper in more places	2018-12-19 11:21:37 -08:00
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	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: 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	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-01-28 10:33:06 -05:00
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: fix possible use-after-free in ip6erspan_rcv	2019-04-08 16:16:47 -07:00
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	gso: validate gso_type on ipip style tunnels	2019-02-20 11:24:27 -08:00
ip6_offload.h	udp: Add GRO functions to UDP socket	2016-04-07 16:53:29 -04:00
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	net: inet: Support UID-based routing in IP protocols.	2016-11-04 14:45:23 -04:00
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	ktime: Get rid of ktime_equal()	2016-12-25 17:21:23 +01:00
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	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	net: remove unused struct inet_frag_queue.fragments field	2019-02-26 08:27:05 -08:00
route.c	route: Avoid crash from dereferencing NULL rt->from	2019-04-15 13:31:59 -07:00
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	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	xfrm: destroy xfrm_state synchronously on net exit path	2019-02-05 06:29:20 +01:00