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Nicolas Dichtel f15ca723c1 net: don't call update_pmtu unconditionally 
Some dst_ops (e.g. md_dst_ops)) doesn't set this handler. It may result to:
"BUG: unable to handle kernel NULL pointer dereference at           (null)"

Let's add a helper to check if update_pmtu is available before calling it.

Fixes: 52a589d51f10 ("geneve: update skb dst pmtu on tx path")
Fixes: a93bf0ff4490 ("vxlan: update skb dst pmtu on tx path")
CC: Roman Kapl <code@rkapl.cz>
CC: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-25 16:27:34 -05:00
..
ila
ila: Add a hook type for LWT routes
2017-11-08 11:20:49 +09:00
netfilter
netfilter: ip6t_MASQUERADE: add dependency on conntrack module
2017-12-11 17:04:50 +01:00
addrconf_core.c
net: ipv6: Make inet6addr_validator a blocking notifier
2017-10-20 13:15:07 +01:00
addrconf.c
treewide: setup_timer() -> timer_setup()
2017-11-21 15:57:07 -08:00
addrlabel.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2017-11-04 09:26:51 +09:00
af_inet6.c
net: reevalulate autoflowlabel setting after sysctl setting
2017-12-21 13:07:20 -05:00
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: convert ifacaddr6.aca_refcnt from atomic_t to refcount_t
2017-07-04 01:29:04 -07:00
calipso.c
net, calipso: convert calipso_doi.refcount from atomic_t to refcount_t
2017-07-04 22:35:16 +01:00
datagram.c
net: convert sock.sk_refcnt from atomic_t to refcount_t
2017-07-01 07:39:08 -07:00
esp6_offload.c
gso: validate gso_type in GSO handlers
2018-01-22 16:01:30 -05:00
esp6.c
xfrm: Return error on unknown encap_type in init_state
2018-01-08 07:17:52 +01:00
exthdrs_core.c
net: ipv6: remove unused code in ipv6_find_hdr()
2017-10-05 21:53:02 -07:00
exthdrs_offload.c
ipv6: fix exthdrs offload registration in out_rt path
2015-09-02 15:31:00 -07:00
exthdrs.c
ipv6: sr: fix TLVs not being copied using setsockopt
2018-01-10 16:03:55 -05:00
fib6_notifier.c
net: Add module reference to FIB notifiers
2017-09-01 20:33:42 -07:00
fib6_rules.c
net: ipv6: avoid overhead when no custom FIB rules are installed
2017-08-08 21:40:08 -07:00
fou6.c
fou: make local function static
2017-05-21 13:42:36 -04:00
icmp.c
ipv6: mark expected switch fall-throughs
2017-10-18 14:13:08 +01:00
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: ipv6: add second dif to inet6 socket lookups
2017-08-07 11:39:22 -07:00
ip6_checksum.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ip6_fib.c
ipv6: don't let tb6_root node share routes with other node
2018-01-18 21:14:00 -05:00
ip6_flowlabel.c
treewide: Switch DEFINE_TIMER callbacks to struct timer_list *
2017-11-21 15:57:05 -08:00
ip6_gre.c
ip6_gre: init dev->mtu and dev->hard_header_len correctly
2018-01-18 21:05:56 -05:00
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
2017-04-20 10:35:33 -04:00
ip6_offload.c
gso: fix payload length when gso_size is zero
2017-10-08 10:12:15 -07:00
ip6_offload.h
udp: Add GRO functions to UDP socket
2016-04-07 16:53:29 -04:00
ip6_output.c
ipv6: Fix getsockopt() for sockets with default IPV6_AUTOFLOWLABEL
2018-01-23 19:53:24 -05:00
ip6_tunnel.c
net: don't call update_pmtu unconditionally
2018-01-25 16:27:34 -05:00
ip6_udp_tunnel.c
ip6_udp_tunnel: remove unused IPCB related codes
2016-11-02 15:18:36 -04:00
ip6_vti.c
net: don't call update_pmtu unconditionally
2018-01-25 16:27:34 -05:00
ip6mr.c
treewide: setup_timer() -> timer_setup()
2017-11-21 15:57:07 -08:00
ipcomp6.c
net: inet: Support UID-based routing in IP protocols.
2016-11-04 14:45:23 -04:00
ipv6_sockglue.c
ipv6: Fix getsockopt() for sockets with default IPV6_AUTOFLOWLABEL
2018-01-23 19:53:24 -05:00
Kconfig
ipv6: sr: add helper functions for seg6local
2017-08-25 17:10:24 -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
ipv6: mcast: better catch silly mtu values
2017-12-13 13:13:15 -05:00
mip6.c
ktime: Get rid of ktime_equal()
2016-12-25 17:21:23 +01:00
ndisc.c
net: ipv6: sysctl to specify IPv6 ND traffic class
2017-11-11 15:13:02 +09:00
netfilter.c
net: inet: Support UID-based routing in IP protocols.
2016-11-04 14:45:23 -04:00
output_core.c
net: accept UFO datagrams from tuntap and packet
2017-11-24 01:37:35 +09:00
ping.c
net/ipv6: Convert icmpv6_push_pending_frames to void
2017-10-06 09:52:31 -07:00
proc.c
proc: snmp6: Use correct type in memset
2017-06-12 09:53:14 -04:00
protocol.c
net: Add sysctl to toggle early demux for tcp and udp
2017-03-24 13:17:07 -07:00
raw.c
ipv6: mark expected switch fall-throughs
2017-10-18 14:13:08 +01:00
reassembly.c
inet: frags: Convert timers to use timer_setup()
2017-10-18 12:39:55 +01:00
route.c
ipv6: Honor specified parameters in fibmatch lookup
2017-12-21 11:51:06 -05:00
seg6_hmac.c
ipv6: sr: Use ARRAY_SIZE macro
2017-09-01 18:35:23 -07:00
seg6_iptunnel.c
ipv6: sr: add support for encapsulation of L2 frames
2017-08-25 17:10:23 -07:00
seg6_local.c
ipv6: sr: remove duplicate routing header type check
2017-09-11 14:34:10 -07:00
seg6.c
ipv6: sr: define core operations for seg6local lightweight tunnel
2017-08-07 14:16:22 -07:00
sit.c
net: don't call update_pmtu unconditionally
2018-01-25 16:27:34 -05:00
syncookies.c
tcp: Namespace-ify sysctl_tcp_workaround_signed_windows
2017-10-28 19:24:38 +09:00
sysctl_net_ipv6.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2017-11-04 09:26:51 +09:00
tcp_ipv6.c
tcp md5sig: Use skb's saddr when replying to an incoming segment
2017-12-12 11:15:42 -05:00
tcpv6_offload.c
gso: validate gso_type in GSO handlers
2018-01-22 16:01:30 -05:00
tunnel6.c
ipv6: fix tunnel error handling
2015-11-03 10:52:13 -05:00
udp_impl.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
udp_offload.c
gso: validate gso_type in GSO handlers
2018-01-22 16:01:30 -05:00
udp.c
locking/atomics: COCCINELLE/treewide: Convert trivial ACCESS_ONCE() patterns to READ_ONCE()/WRITE_ONCE()
2017-10-25 11:01:08 +02:00
udplite.c
udplite: call proper backlog handlers
2016-11-24 15:32:14 -05:00
xfrm6_input.c
xfrm: Reinject transport-mode packets through tasklet
2017-12-19 08:23:21 +01:00
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: Handle errors reported by xfrm6_find_1stfragopt()
2017-06-02 13:57:27 -04:00
xfrm6_mode_transport.c
ipv6: xfrm: Handle errors reported by xfrm6_find_1stfragopt()
2017-06-02 13:57:27 -04:00
xfrm6_mode_tunnel.c
xfrm: Fix eth_hdr(skb)->h_proto to reflect inner IP version
2018-01-23 10:56:36 +01:00
xfrm6_output.c
xfrm: Add an IPsec hardware offloading API
2017-04-14 10:06:10 +02:00
xfrm6_policy.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2017-11-04 09:26:51 +09:00
xfrm6_protocol.c
xfrm: input: constify xfrm_input_afinfo
2017-02-09 10:22:17 +01:00
xfrm6_state.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
xfrm6_tunnel.c
xfrm6_tunnel: exit_net cleanup check added
2017-11-14 15:46:17 +09:00