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android_kernel_xiaomi_sm8450/net/ipv6
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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: a68886a69180 ("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
addrconf_core.c
ipv6_stub: add ipv6_route_input stub/proxy.
2019-02-13 18:27:55 -08:00
addrconf.c
net: ignore sysctl_devconf_inherit_init_net without SYSCTL
2019-03-04 13:14:34 -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_offload.c
net: use skb_sec_path helper in more places
2018-12-19 11:21:37 -08:00
esp6.c
esp: Skip TX bytes accounting when sending from a request socket
2019-01-28 11:20:58 +01:00
exthdrs_core.c
net: ipv6: Fix typo in ipv6_find_hdr() documentation
2018-05-07 23:50:27 -04:00
exthdrs_offload.c
ipv6: fix exthdrs offload registration in out_rt path
2015-09-02 15:31:00 -07:00
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: 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
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
net: remove unneeded switch fall-through
2019-02-21 13:48:00 -08:00
mcast.c
bridge: join all-snoopers multicast address
2019-01-22 17:18:08 -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_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
ipv6: propagate genlmsg_reply return code
2019-02-12 12:36:02 -05:00
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_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
udpv6: Check address length before reading address family
2019-04-12 10:25:03 -07:00
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