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linux/net/ipv6
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Antoine Tenart 832ba59649 net: ip6_gre: set dev->hard_header_len when using header_ops 
syzkaller managed to crash the kernel using an NBMA ip6gre interface. I
could reproduce it creating an NBMA ip6gre interface and forwarding
traffic to it:

  skbuff: skb_under_panic: text:ffffffff8250e927 len:148 put:44 head:ffff8c03c7a33
  ------------[ cut here ]------------
  kernel BUG at net/core/skbuff.c:109!
  Call Trace:
  skb_push+0x10/0x10
  ip6gre_header+0x47/0x1b0
  neigh_connected_output+0xae/0xf0

ip6gre tunnel provides its own header_ops->create, and sets it
conditionally when initializing the tunnel in NBMA mode. When
header_ops->create is used, dev->hard_header_len should reflect the
length of the header created. Otherwise, when not used,
dev->needed_headroom should be used.

Fixes: eb95f52fc7 ("net: ipv6_gre: Fix GRO to work on IPv6 over GRE tap")
Cc: Maria Pasechnik <mariap@mellanox.com>
Signed-off-by: Antoine Tenart <atenart@kernel.org>
Link: https://lore.kernel.org/r/20201130161911.464106-1-atenart@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-12-02 11:16:12 -08:00
..
ila net: Add MODULE_DESCRIPTION entries to network modules 2020-06-20 21:33:57 -07:00
netfilter ipv6: Remove dependency of ipv6_frag_thdr_truncated on ipv6 module 2020-11-19 10:49:50 -08:00
addrconf_core.c ipv6: add ipv6_fragment hook in ipv6_stub 2020-08-31 12:26:39 -07:00
addrconf.c ipv6: Fix error path to cancel the meseage 2020-11-13 18:20:00 -08:00
addrlabel.c ipv6: addrlabel: fix possible memory leak in ip6addrlbl_net_init 2020-11-25 11:20:16 -08:00
af_inet6.c ipv6: add ipv6_fragment hook in ipv6_stub 2020-08-31 12:26:39 -07:00
ah6.c ah6: fix error return code in ah6_input() 2020-11-18 10:53:16 -08:00
anycast.c ipv6: fix memory leaks on IPV6_ADDRFORM path 2020-07-30 16:30:55 -07:00
calipso.c net/ipv6: use semicolons rather than commas to separate statements 2020-10-13 17:11:52 -07:00
datagram.c icmp6: support rfc 4884 2020-07-24 17:12:41 -07:00
esp6_offload.c net: Add MODULE_DESCRIPTION entries to network modules 2020-06-20 21:33:57 -07:00
esp6.c xfrm: esp6: fix the location of the transport header with encapsulation 2020-07-28 07:57:23 +02:00
exthdrs_core.c ipv6: remove printk 2019-07-27 14:23:48 -07:00
exthdrs_offload.c
exthdrs.c net: ipv6: kerneldoc fixes 2020-07-13 17:20:39 -07:00
fib6_notifier.c net: fib_notifier: propagate extack down to the notifier block callback 2019-10-04 11:10:56 -07:00
fib6_rules.c fib: use indirect call wrappers in the most common fib_rules_ops 2020-07-28 17:42:31 -07:00
fou6.c net: Add MODULE_DESCRIPTION entries to network modules 2020-06-20 21:33:57 -07:00
icmp.c IPv6: reply ICMP error if the first fragment don't include all headers 2020-10-31 13:16:02 -07:00
inet6_connection_sock.c net: add bool confirm_neigh parameter for dst_ops.update_pmtu 2019-12-24 22:28:54 -08:00
inet6_hashtables.c net: ipv6: remove unused arg exact_dif in compute_score 2020-08-31 13:08:10 -07:00
ip6_checksum.c
ip6_fib.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-10-15 12:43:21 -07:00
ip6_flowlabel.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2020-08-05 20:13:21 -07:00
ip6_gre.c net: ip6_gre: set dev->hard_header_len when using header_ops 2020-12-02 11:16:12 -08:00
ip6_icmp.c ipv6: icmp6: avoid indirect call for icmpv6_send() 2020-06-19 13:41:59 -07:00
ip6_input.c bpf: Add socket assign support 2020-03-30 13:45:04 -07:00
ip6_offload.c udp: move gro declarations to net/udp.h 2020-06-23 20:10:15 -07:00
ip6_offload.h
ip6_output.c networking changes for the 5.10 merge window 2020-10-15 18:42:13 -07:00
ip6_tunnel.c ip6_tunnel: set inner ipproto before ip6_tnl_encap 2020-10-30 08:07:30 -07:00
ip6_udp_tunnel.c net: Make locking in sock_bindtoindex optional 2020-06-01 14:57:14 -07:00
ip6_vti.c ipv6: use dev_sw_netstats_rx_add() 2020-10-06 06:23:21 -07:00
ip6mr.c net/ipv6: switch ip6_mroute_setsockopt to sockptr_t 2020-07-24 15:41:54 -07:00
ipcomp6.c ipcomp: assign if_id to child tunnel from parent tunnel 2020-07-09 12:55:37 +02:00
ipv6_sockglue.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-08-02 01:02:12 -07:00
Kconfig net: ipv6: fix kconfig dependency warning for IPV6_SEG6_HMAC 2020-09-18 17:45:04 -07:00
Makefile net: ipv6: add rpl sr tunnel 2020-03-29 22:30:57 -07:00
mcast_snoop.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 343 2019-06-05 17:37:07 +02:00
mcast.c mld: fix memory leak in ipv6_mc_destroy_dev() 2020-06-15 13:29:39 -07:00
mip6.c xfrm: remove type and offload_type map from xfrm_state_afinfo 2019-06-06 08:34:50 +02:00
ndisc.c net: Exempt multicast addresses from five-second neighbor lifetime 2020-11-13 14:24:39 -08:00
netfilter.c netfilter: use actual socket sk rather than skb sk when routing harder 2020-10-30 12:57:39 +01:00
output_core.c
ping.c ipv6/ping: set skb->mark on icmpv6 sockets 2020-07-03 14:36:04 -07:00
proc.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-06-07 11:00:14 -07:00
protocol.c
raw.c csum_partial_copy_nocheck(): drop the last argument 2020-08-20 15:45:14 -04:00
reassembly.c ipv6: Remove dependency of ipv6_frag_thdr_truncated on ipv6 module 2020-11-19 10:49:50 -08:00
route.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-10-15 12:43:21 -07:00
rpl_iptunnel.c net: ipv6: Use struct_size() helper and kcalloc() 2020-06-23 20:27:09 -07:00
rpl.c ipv6: rpl: fix full address compression 2020-04-18 15:04:27 -07:00
seg6_hmac.c crypto: lib/sha1 - remove unnecessary includes of linux/cryptohash.h 2020-05-08 15:32:17 +10:00
seg6_iptunnel.c seg6_iptunnel: Refactor seg6_lwt_headroom out of uapi header 2020-08-03 17:57:40 -07:00
seg6_local.c seg6: fix seg6_validate_srh() to avoid slab-out-of-bounds 2020-06-04 15:39:32 -07:00
seg6.c seg6: fix seg6_validate_srh() to avoid slab-out-of-bounds 2020-06-04 15:39:32 -07:00
sit.c IPv6: Set SIT tunnel hard_header_len to zero 2020-11-09 15:07:40 -08:00
syncookies.c net: Update window_clamp if SOCK_RCVBUF is set 2020-11-10 17:42:35 -08:00
sysctl_net_ipv6.c ipv6: Fix sysctl max for fib_multipath_hash_policy 2020-09-02 15:44:53 -07:00
tcp_ipv6.c tcp: Set ECT0 bit in tos/tclass for synack when BPF needs ECN 2020-11-24 14:12:55 -08:00
tcpv6_offload.c
tunnel6.c tunnel6: add tunnel6_input_afinfo for ipip and ipv6 tunnels 2020-07-09 12:52:37 +02:00
udp_impl.h net: pass a sockptr_t into ->setsockopt 2020-07-24 15:41:54 -07:00
udp_offload.c net: udp: fix IP header access and skb lookup on Fast/frag0 UDP GRO 2020-11-12 09:55:51 -08:00
udp.c udp, bpf: Ignore connections in reuseport group after BPF sk lookup 2020-07-31 02:00:48 +02:00
udplite.c net/ipv6: remove compat_ipv6_{get,set}sockopt 2020-07-19 18:16:41 -07:00
xfrm6_input.c xfrm: state: remove extract_input indirection from xfrm_state_afinfo 2020-05-06 09:40:08 +02:00
xfrm6_output.c xfrm: remove output_finish indirection from xfrm_state_afinfo 2020-05-06 09:40:08 +02:00
xfrm6_policy.c net: add bool confirm_neigh parameter for dst_ops.update_pmtu 2019-12-24 22:28:54 -08:00
xfrm6_protocol.c xfrm: add support for UDPv6 encapsulation of ESP 2020-04-28 11:28:36 +02:00
xfrm6_state.c xfrm: remove output_finish indirection from xfrm_state_afinfo 2020-05-06 09:40:08 +02:00
xfrm6_tunnel.c xfrm: interface: fix the priorities for ipip and ipv6 tunnels 2020-10-09 12:29:48 +02:00