Sabrina Dubroca 28d35bcdd3 net: ipv4: don't let PMTU updates increase route MTU ... When an MTU update with PMTU smaller than net.ipv4.route.min_pmtu is received, we must clamp its value. However, we can receive a PMTU exception with PMTU < old_mtu < ip_rt_min_pmtu, which would lead to an increase in PMTU. To fix this, take the smallest of the old MTU and ip_rt_min_pmtu. Before this patch, in case of an update, the exception's MTU would always change. Now, an exception can have only its lock flag updated, but not the MTU, so we need to add a check on locking to the following "is this exception getting updated, or close to expiring?" test. Fixes: d52e5a7e7c ("ipv4: lock mtu in fnhe when received PMTU < net.ipv4.route.min_pmtu") Signed-off-by: Sabrina Dubroca <sd@queasysnail.net> Reviewed-by: Stefano Brivio <sbrivio@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2018-10-10 22:44:46 -07:00
..
bpfilter	bpfilter: remove trailing newline	2018-07-24 14:10:42 -07:00
netfilter	netfilter: kconfig: nat related expression depend on nftables core	2018-08-31 19:07:10 +02:00
af_inet.c	gso_segment: Reset skb->mac_len after modifying network header	2018-09-13 12:09:32 -07:00
ah4.c
arp.c
cipso_ipv4.c
datagram.c
devinet.c	route: add support for directed broadcast forwarding	2018-07-29 12:37:06 -07:00
esp4_offload.c	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next	2018-07-27 09:33:37 -07:00
esp4.c
fib_frontend.c	net: ipv4: update fnhe_pmtu when first hop's MTU changes	2018-10-10 22:44:46 -07:00
fib_lookup.h
fib_notifier.c
fib_rules.c
fib_semantics.c	net: ipv4: update fnhe_pmtu when first hop's MTU changes	2018-10-10 22:44:46 -07:00
fib_trie.c
fou.c
gre_demux.c
gre_offload.c
icmp.c
igmp.c	igmp: fix incorrect unsolicit report count after link down and up	2018-09-02 13:39:37 -07:00
inet_connection_sock.c	inet: make sure to grab rcu_read_lock before using ireq->ireq_opt	2018-10-02 15:52:12 -07:00
inet_diag.c
inet_fragment.c	ip: process in-order fragments efficiently	2018-08-11 17:54:18 -07:00
inet_hashtables.c	bpf: Enable BPF_PROG_TYPE_SK_REUSEPORT bpf prog in reuseport selection	2018-08-11 01:58:46 +02:00
inet_timewait_sock.c
inetpeer.c
ip_forward.c	net: ipv4: Control SKB reprioritization after forwarding	2018-08-01 09:52:30 -07:00
ip_fragment.c	ip: frags: fix crash in ip_do_fragment()	2018-09-09 14:50:56 -07:00
ip_gre.c	erspan: fix error handling for erspan tunnel	2018-09-11 23:50:54 -07:00
ip_input.c
ip_options.c
ip_output.c	Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net	2018-07-24 19:21:58 -07:00
ip_sockglue.c	ipv4: fix use-after-free in ip_cmsg_recv_dstaddr()	2018-10-02 22:32:05 -07:00
ip_tunnel_core.c
ip_tunnel.c	ip_tunnel: be careful when accessing the inner header	2018-09-24 12:27:04 -07:00
ip_vti.c	ip_vti: fix a null pointer deferrence when create vti fallback tunnel	2018-08-19 11:26:39 -07:00
ipcomp.c
ipconfig.c
ipip.c
ipmr_base.c
ipmr.c
Kconfig	net: remove blank lines at end of file	2018-07-24 14:10:43 -07:00
Makefile	net: remove blank lines at end of file	2018-07-24 14:10:43 -07:00
metrics.c
netfilter.c
netlink.c
ping.c	net: add helpers checking if socket can be bound to nonlocal address	2018-08-01 09:50:04 -07:00
proc.c	ip: discard IPv4 datagrams with overlapping segments.	2018-08-05 17:16:46 -07:00
protocol.c
raw_diag.c
raw.c
route.c	net: ipv4: don't let PMTU updates increase route MTU	2018-10-10 22:44:46 -07:00
syncookies.c
sysctl_net_ipv4.c	net-tcp: /proc/sys/net/ipv4/tcp_probe_interval is a u32 not int	2018-09-26 20:33:21 -07:00
tcp_bbr.c	tcp_bbr: apply PROBE_RTT cwnd cap even if acked==0	2018-08-22 21:45:32 -07:00
tcp_bic.c
tcp_cdg.c
tcp_cong.c
tcp_cubic.c
tcp_dctcp.c	tcp: avoid resetting ACK timer in DCTCP	2018-08-11 11:31:35 -07:00
tcp_diag.c
tcp_fastopen.c
tcp_highspeed.c
tcp_htcp.c
tcp_hybla.c
tcp_illinois.c
tcp_input.c	tcp/dccp: fix lockdep issue when SYN is backlogged	2018-10-01 15:42:13 -07:00
tcp_ipv4.c	inet: make sure to grab rcu_read_lock before using ireq->ireq_opt	2018-10-02 15:52:12 -07:00
tcp_lp.c
tcp_metrics.c
tcp_minisocks.c	tcp: do not restart timewait timer on rst reception	2018-08-31 23:10:35 -07:00
tcp_nv.c
tcp_offload.c
tcp_output.c	tcp: remove set but not used variable 'skb_size'	2018-08-01 09:57:09 -07:00
tcp_rate.c
tcp_recovery.c	tcp: add stat of data packet reordering events	2018-08-01 09:56:10 -07:00
tcp_scalable.c
tcp_timer.c	tcp: make function tcp_retransmit_stamp() static	2018-07-25 16:35:45 -07:00
tcp_ulp.c	tcp, ulp: fix leftover icsk_ulp_ops preventing sock from reattach	2018-08-16 14:58:08 -07:00
tcp_vegas.c
tcp_vegas.h
tcp_veno.c
tcp_westwood.c
tcp_yeah.c
tcp.c	tcp: really ignore MSG_ZEROCOPY if no SO_ZEROCOPY	2018-09-07 23:11:06 -07:00
tunnel4.c
udp_diag.c
udp_impl.h
udp_offload.c
udp_tunnel.c
udp.c	udp: Unbreak modules that rely on external __skb_recv_udp() availability	2018-10-07 20:33:10 -07:00
udplite.c
xfrm4_input.c	xfrm: reset transport header back to network header after all input transforms ahave been applied	2018-09-04 10:26:30 +02:00
xfrm4_mode_beet.c
xfrm4_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
xfrm4_mode_tunnel.c
xfrm4_output.c
xfrm4_policy.c
xfrm4_protocol.c
xfrm4_state.c
xfrm4_tunnel.c