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2022-09-30ip6_vti:Remove the space before the commaHongbin Wang1-1/+1
There should be no space before the comma Signed-off-by: Hongbin Wang <wh_bin@126.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-08-22ipv6: move from strlcpy with unused retval to strscpyWolfram Sang1-1/+1
Follow the advice of the below link and prefer 'strscpy' in this subsystem. Conversion is 1:1 because the return value is not used. Generated by a coccinelle script. Link: https://lore.kernel.org/r/CAHk-=wgfRnXz0W3D37d01q3JFkr_i_uTL=V6A6G1oUZcprmknw@mail.gmail.com/ Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Link: https://lore.kernel.org/r/20220818210220.8491-1-wsa+renesas@sang-engineering.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-06-09net: rename reference+tracking helpersJakub Kicinski1-2/+2
Netdev reference helpers have a dev_ prefix for historic reasons. Renaming the old helpers would be too much churn but we can rename the tracking ones which are relatively recent and should be the default for new code. Rename: dev_hold_track() -> netdev_hold() dev_put_track() -> netdev_put() dev_replace_track() -> netdev_ref_replace() Link: https://lore.kernel.org/r/20220608043955.919359-1-kuba@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-12-30Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski1-0/+2
drivers/net/ethernet/mellanox/mlx5/core/en_tc.c commit 077cdda764c7 ("net/mlx5e: TC, Fix memory leak with rules with internal port") commit 31108d142f36 ("net/mlx5: Fix some error handling paths in 'mlx5e_tc_add_fdb_flow()'") commit 4390c6edc0fb ("net/mlx5: Fix some error handling paths in 'mlx5e_tc_add_fdb_flow()'") https://lore.kernel.org/all/20211229065352.30178-1-saeed@kernel.org/ net/smc/smc_wr.c commit 49dc9013e34b ("net/smc: Use the bitmap API when applicable") commit 349d43127dac ("net/smc: fix kernel panic caused by race of smc_sock") bitmap_zero()/memset() is removed by the fix Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-12-27ip6_vti: initialize __ip6_tnl_parm struct in vti6_siocdevprivateWilliam Zhao1-0/+2
The "__ip6_tnl_parm" struct was left uninitialized causing an invalid load of random data when the "__ip6_tnl_parm" struct was used elsewhere. As an example, in the function "ip6_tnl_xmit_ctl()", it tries to access the "collect_md" member. With "__ip6_tnl_parm" being uninitialized and containing random data, the UBSAN detected that "collect_md" held a non-boolean value. The UBSAN issue is as follows: =============================================================== UBSAN: invalid-load in net/ipv6/ip6_tunnel.c:1025:14 load of value 30 is not a valid value for type '_Bool' CPU: 1 PID: 228 Comm: kworker/1:3 Not tainted 5.16.0-rc4+ #8 Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: <TASK> dump_stack_lvl+0x44/0x57 ubsan_epilogue+0x5/0x40 __ubsan_handle_load_invalid_value+0x66/0x70 ? __cpuhp_setup_state+0x1d3/0x210 ip6_tnl_xmit_ctl.cold.52+0x2c/0x6f [ip6_tunnel] vti6_tnl_xmit+0x79c/0x1e96 [ip6_vti] ? lock_is_held_type+0xd9/0x130 ? vti6_rcv+0x100/0x100 [ip6_vti] ? lock_is_held_type+0xd9/0x130 ? rcu_read_lock_bh_held+0xc0/0xc0 ? lock_acquired+0x262/0xb10 dev_hard_start_xmit+0x1e6/0x820 __dev_queue_xmit+0x2079/0x3340 ? mark_lock.part.52+0xf7/0x1050 ? netdev_core_pick_tx+0x290/0x290 ? kvm_clock_read+0x14/0x30 ? kvm_sched_clock_read+0x5/0x10 ? sched_clock_cpu+0x15/0x200 ? find_held_lock+0x3a/0x1c0 ? lock_release+0x42f/0xc90 ? lock_downgrade+0x6b0/0x6b0 ? mark_held_locks+0xb7/0x120 ? neigh_connected_output+0x31f/0x470 ? lockdep_hardirqs_on+0x79/0x100 ? neigh_connected_output+0x31f/0x470 ? ip6_finish_output2+0x9b0/0x1d90 ? rcu_read_lock_bh_held+0x62/0xc0 ? ip6_finish_output2+0x9b0/0x1d90 ip6_finish_output2+0x9b0/0x1d90 ? ip6_append_data+0x330/0x330 ? ip6_mtu+0x166/0x370 ? __ip6_finish_output+0x1ad/0xfb0 ? nf_hook_slow+0xa6/0x170 ip6_output+0x1fb/0x710 ? nf_hook.constprop.32+0x317/0x430 ? ip6_finish_output+0x180/0x180 ? __ip6_finish_output+0xfb0/0xfb0 ? lock_is_held_type+0xd9/0x130 ndisc_send_skb+0xb33/0x1590 ? __sk_mem_raise_allocated+0x11cf/0x1560 ? dst_output+0x4a0/0x4a0 ? ndisc_send_rs+0x432/0x610 addrconf_dad_completed+0x30c/0xbb0 ? addrconf_rs_timer+0x650/0x650 ? addrconf_dad_work+0x73c/0x10e0 addrconf_dad_work+0x73c/0x10e0 ? addrconf_dad_completed+0xbb0/0xbb0 ? rcu_read_lock_sched_held+0xaf/0xe0 ? rcu_read_lock_bh_held+0xc0/0xc0 process_one_work+0x97b/0x1740 ? pwq_dec_nr_in_flight+0x270/0x270 worker_thread+0x87/0xbf0 ? process_one_work+0x1740/0x1740 kthread+0x3ac/0x490 ? set_kthread_struct+0x100/0x100 ret_from_fork+0x22/0x30 </TASK> =============================================================== The solution is to initialize "__ip6_tnl_parm" struct to zeros in the "vti6_siocdevprivate()" function. Signed-off-by: William Zhao <wizhao@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-12-06ipv6: add net device refcount tracker to struct ip6_tnlEric Dumazet1-2/+2
Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-10-13ip: use dev_addr_set() in tunnelsJakub Kicinski1-1/+1
Use dev_addr_set() instead of writing to netdev->dev_addr directly in ip tunnels drivers. Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-07-27ip_tunnel: use ndo_siocdevprivateArnd Bergmann1-10/+11
The various ipv4 and ipv6 tunnel drivers each implement a set of 12 SIOCDEVPRIVATE commands for managing tunnels. These all work correctly in compat mode. Move them over to the new .ndo_siocdevprivate operation. Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> Cc: David Ahern <dsahern@kernel.org> Cc: Steffen Klassert <steffen.klassert@secunet.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-04-09Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski1-2/+4
Conflicts: MAINTAINERS - keep Chandrasekar drivers/net/ethernet/mellanox/mlx5/core/en_main.c - simple fix + trust the code re-added to param.c in -next is fine include/linux/bpf.h - trivial include/linux/ethtool.h - trivial, fix kdoc while at it include/linux/skmsg.h - move to relevant place in tcp.c, comment re-wrapped net/core/skmsg.c - add the sk = sk // sk = NULL around calls net/tipc/crypto.c - trivial Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-03-31ipv6: remove extra dev_hold() for fallback tunnelsEric Dumazet1-1/+0
My previous commits added a dev_hold() in tunnels ndo_init(), but forgot to remove it from special functions setting up fallback tunnels. Fallback tunnels do call their respective ndo_init() This leads to various reports like : unregister_netdevice: waiting for ip6gre0 to become free. Usage count = 2 Fixes: 48bb5697269a ("ip6_tunnel: sit: proper dev_{hold|put} in ndo_[un]init methods") Fixes: 6289a98f0817 ("sit: proper dev_{hold|put} in ndo_[un]init methods") Fixes: 40cb881b5aaa ("ip6_vti: proper dev_{hold|put} in ndo_[un]init methods") Fixes: 7f700334be9a ("ip6_gre: proper dev_{hold|put} in ndo_[un]init methods") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: syzbot <syzkaller@googlegroups.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-03-31Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsecDavid S. Miller1-2/+4
Steffen Klassert says: ==================== pull request (net): ipsec 2021-03-31 1) Fix ipv4 pmtu checks for xfrm anf vti interfaces. From Eyal Birger. 2) There are situations where the socket passed to xfrm_output_resume() is not the same as the one attached to the skb. Use the socket passed to xfrm_output_resume() to avoid lookup failures when xfrm is used with VRFs. From Evan Nimmo. 3) Make the xfrm_state_hash_generation sequence counter per network namespace because but its write serialization lock is also per network namespace. Write protection is insufficient otherwise. From Ahmed S. Darwish. 4) Fixup sctp featue flags when used with esp offload. From Xin Long. 5) xfrm BEET mode doesn't support fragments for inner packets. This is a limitation of the protocol, so no fix possible. Warn at least to notify the user about that situation. From Xin Long. 6) Fix NULL pointer dereference on policy lookup when namespaces are uses in combination with esp offload. 7) Fix incorrect transformation on esp offload when packets get segmented at layer 3. 8) Fix some user triggered usages of WARN_ONCE in the xfrm compat layer. From Dmitry Safonov. Please pull or let me know if there are problems. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2021-03-29ip6_vti: proper dev_{hold|put} in ndo_[un]init methodsEric Dumazet1-1/+1
After adopting CONFIG_PCPU_DEV_REFCNT=n option, syzbot was able to trigger a warning [1] Issue here is that: - all dev_put() should be paired with a corresponding prior dev_hold(). - A driver doing a dev_put() in its ndo_uninit() MUST also do a dev_hold() in its ndo_init(), only when ndo_init() is returning 0. Otherwise, register_netdevice() would call ndo_uninit() in its error path and release a refcount too soon. Therefore, we need to move dev_hold() call from vti6_tnl_create2() to vti6_dev_init_gen() [1] WARNING: CPU: 0 PID: 15951 at lib/refcount.c:31 refcount_warn_saturate+0xbf/0x1e0 lib/refcount.c:31 Modules linked in: CPU: 0 PID: 15951 Comm: syz-executor.3 Not tainted 5.12.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:refcount_warn_saturate+0xbf/0x1e0 lib/refcount.c:31 Code: 1d 6a 5a e8 09 31 ff 89 de e8 8d 1a ab fd 84 db 75 e0 e8 d4 13 ab fd 48 c7 c7 a0 e1 c1 89 c6 05 4a 5a e8 09 01 e8 2e 36 fb 04 <0f> 0b eb c4 e8 b8 13 ab fd 0f b6 1d 39 5a e8 09 31 ff 89 de e8 58 RSP: 0018:ffffc90001eaef28 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff815c51f5 RDI: fffff520003d5dd7 RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff815bdf8e R11: 0000000000000000 R12: ffff88801bb1c568 R13: ffff88801f69e800 R14: 00000000ffffffff R15: ffff888050889d40 FS: 00007fc79314e700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1c1ff47108 CR3: 0000000020fd5000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __refcount_dec include/linux/refcount.h:344 [inline] refcount_dec include/linux/refcount.h:359 [inline] dev_put include/linux/netdevice.h:4135 [inline] vti6_dev_uninit+0x31a/0x360 net/ipv6/ip6_vti.c:297 register_netdevice+0xadf/0x1500 net/core/dev.c:10308 vti6_tnl_create2+0x1b5/0x400 net/ipv6/ip6_vti.c:190 vti6_newlink+0x9d/0xd0 net/ipv6/ip6_vti.c:1020 __rtnl_newlink+0x1062/0x1710 net/core/rtnetlink.c:3443 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3491 rtnetlink_rcv_msg+0x44e/0xad0 net/core/rtnetlink.c:5553 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2502 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:674 ____sys_sendmsg+0x331/0x810 net/socket.c:2350 ___sys_sendmsg+0xf3/0x170 net/socket.c:2404 __sys_sendmmsg+0x195/0x470 net/socket.c:2490 __do_sys_sendmmsg net/socket.c:2519 [inline] __se_sys_sendmmsg net/socket.c:2516 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2516 Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-03-03vti6: fix ipv4 pmtu check to honor ip header dfEyal Birger1-2/+4
Frag needed should only be sent if the header enables DF. This fix allows IPv4 packets larger than MTU to pass the vti6 interface and be fragmented after encapsulation, aligning behavior with non-vti6 xfrm. Fixes: ccd740cbc6e0 ("vti6: Add pmtu handling to vti6_xmit.") Signed-off-by: Eyal Birger <eyal.birger@gmail.com> Reviewed-by: Sabrina Dubroca <sd@queasysnail.net> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2021-03-01net: always use icmp{,v6}_ndo_send from ndo_start_xmitJason A. Donenfeld1-3/+3
There were a few remaining tunnel drivers that didn't receive the prior conversion to icmp{,v6}_ndo_send. Knowing now that this could lead to memory corrution (see ee576c47db60 ("net: icmp: pass zeroed opts from icmp{,v6}_ndo_send before sending") for details), there's even more imperative to have these all converted. So this commit goes through the remaining cases that I could find and does a boring translation to the ndo variety. The Fixes: line below is the merge that originally added icmp{,v6}_ ndo_send and converted the first batch of icmp{,v6}_send users. The rationale then for the change applies equally to this patch. It's just that these drivers were left out of the initial conversion because these network devices are hiding in net/ rather than in drivers/net/. Cc: Florian Westphal <fw@strlen.de> Cc: Willem de Bruijn <willemb@google.com> Cc: David S. Miller <davem@davemloft.net> Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> Cc: David Ahern <dsahern@kernel.org> Cc: Jakub Kicinski <kuba@kernel.org> Cc: Steffen Klassert <steffen.klassert@secunet.com> Fixes: 803381f9f117 ("Merge branch 'icmp-account-for-NAT-when-sending-icmps-from-ndo-layer'") Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Acked-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-11-09vti: switch to dev_get_tstats64Heiner Kallweit1-1/+1
Replace ip_tunnel_get_stats64() with the new identical core function dev_get_tstats64(). Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-02net: ipv6: For kerneldoc warnings with W=1Xin Long1-0/+1
net/ipv6/addrconf.c:2005: warning: Function parameter or member 'dev' not described in 'ipv6_dev_find' net/ipv6/ip6_vti.c:138: warning: Function parameter or member 'ip6n' not described in 'vti6_tnl_bucket' net/ipv6/ip6_tunnel.c:218: warning: Function parameter or member 'ip6n' not described in 'ip6_tnl_bucket' net/ipv6/ip6_tunnel.c:238: warning: Function parameter or member 'ip6n' not described in 'ip6_tnl_link' net/ipv6/ip6_tunnel.c:254: warning: Function parameter or member 'ip6n' not described in 'ip6_tnl_unlink' net/ipv6/ip6_tunnel.c:427: warning: Function parameter or member 'raw' not described in 'ip6_tnl_parse_tlv_enc_lim' net/ipv6/ip6_tunnel.c:499: warning: Function parameter or member 'skb' not described in 'ip6_tnl_err' net/ipv6/ip6_tunnel.c:499: warning: Function parameter or member 'ipproto' not described in 'ip6_tnl_err' net/ipv6/ip6_tunnel.c:499: warning: Function parameter or member 'opt' not described in 'ip6_tnl_err' net/ipv6/ip6_tunnel.c:499: warning: Function parameter or member 'type' not described in 'ip6_tnl_err' net/ipv6/ip6_tunnel.c:499: warning: Function parameter or member 'code' not described in 'ip6_tnl_err' net/ipv6/ip6_tunnel.c:499: warning: Function parameter or member 'msg' not described in 'ip6_tnl_err' net/ipv6/ip6_tunnel.c:499: warning: Function parameter or member 'info' not described in 'ip6_tnl_err' net/ipv6/ip6_tunnel.c:499: warning: Function parameter or member 'offset' not described in 'ip6_tnl_err' ip6_tnl_err() is an internal function, so remove the kerneldoc. For the others, add the missing parameters. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: Andrew Lunn <andrew@lunn.ch> Link: https://lore.kernel.org/r/20201031183044.1082193-1-andrew@lunn.ch Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-10-06ipv6: use dev_sw_netstats_rx_add()Fabian Frederick1-7/+1
use new helper for netstats settings Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-30Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-nextDavid S. Miller1-1/+51
Steffen Klassert says: ==================== pull request (net-next): ipsec-next 2020-07-30 Please note that I did the first time now --no-ff merges of my testing branch into the master branch to include the [PATCH 0/n] message of a patchset. Please let me know if this is desirable, or if I should do it any different. 1) Introduce a oseq-may-wrap flag to disable anti-replay protection for manually distributed ICVs as suggested in RFC 4303. From Petr Vaněk. 2) Patchset to fully support IPCOMP for vti4, vti6 and xfrm interfaces. From Xin Long. 3) Switch from a linear list to a hash list for xfrm interface lookups. From Eyal Birger. 4) Fixes to not register one xfrm(6)_tunnel object twice. From Xin Long. 5) Fix two compile errors that were introduced with the IPCOMP support for vti and xfrm interfaces. Also from Xin Long. 6) Make the policy hold queue work with VTI. This was forgotten when VTI was implemented. Please pull or let me know if there are problems. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-21xfrm: Make the policy hold queue work with VTI.Steffen Klassert1-1/+5
We forgot to support the xfrm policy hold queue when VTI was implemented. This patch adds everything we need so that we can use the policy hold queue together with VTI interfaces. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2020-07-17ip6_vti: use IS_REACHABLE to avoid some compile errorsXin Long1-4/+4
Naresh reported some compile errors: arm build failed due this error on linux-next 20200713 and 20200713 net/ipv6/ip6_vti.o: In function `vti6_rcv_tunnel': ip6_vti.c:(.text+0x1d20): undefined reference to `xfrm6_tunnel_spi_lookup' This happened when set CONFIG_IPV6_VTI=y and CONFIG_INET6_TUNNEL=m. We don't really want ip6_vti to depend inet6_tunnel completely, but only to disable the tunnel code when inet6_tunnel is not seen. So instead of adding "select INET6_TUNNEL" for IPV6_VTI, this patch is only to change to IS_REACHABLE to avoid these compile error. Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org> Fixes: 08622869ed3f ("ip6_vti: support IP6IP6 tunnel processing with .cb_handler") Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2020-07-14ip6_vti: not register vti_ipv6_handler twiceXin Long1-3/+10
An xfrm6_tunnel object is linked into the list when registering, so vti_ipv6_handler can not be registered twice, otherwise its next pointer will be overwritten on the second time. So this patch is to define a new xfrm6_tunnel object to register for AF_INET. Fixes: 2ab110cbb0c0 ("ip6_vti: support IP6IP tunnel processing") Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2020-07-09ip6_vti: support IP6IP tunnel processingXin Long1-2/+8
For IP6IP tunnel processing, the functions called will be the same as that for IP6IP6 tunnel's. So reuse it and register it with family == AF_INET. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2020-07-09ip6_vti: support IP6IP6 tunnel processing with .cb_handlerXin Long1-0/+33
Similar to IPIP tunnel's processing, this patch is to support IP6IP6 tunnel processing with .cb_handler. v1->v2: - no change. v2-v3: - enable it only when CONFIG_INET6_XFRM_TUNNEL is defined, to fix the build error, reported by kbuild test robot. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2020-06-30net: vti: implement header_ops->parse_protocol for AF_PACKETJason A. Donenfeld1-0/+1
Vti uses skb->protocol to determine packet type, and bails out if it's not set. For AF_PACKET injection, we need to support its call chain of: packet_sendmsg -> packet_snd -> packet_parse_headers -> dev_parse_header_protocol -> parse_protocol Without a valid parse_protocol, this returns zero, and vti rejects the skb. So, this wires up the ip_tunnel handler for layer 3 packets for that case. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-28xfrm: add support for UDPv6 encapsulation of ESPSabrina Dubroca1-2/+16
This patch adds support for encapsulation of ESP over UDPv6. The code is very similar to the IPv4 encapsulation implementation, and allows to easily add espintcp on IPv6 as a follow-up. Signed-off-by: Sabrina Dubroca <sd@queasysnail.net> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2020-03-16vti6: Fix memory leak of skb if input policy check failsTorsten Hilbrich1-1/+1
The vti6_rcv function performs some tests on the retrieved tunnel including checking the IP protocol, the XFRM input policy, the source and destination address. In all but one places the skb is released in the error case. When the input policy check fails the network packet is leaked. Using the same goto-label discard in this case to fix this problem. Fixes: ed1efb2aefbb ("ipv6: Add support for IPsec virtual tunnel interfaces") Signed-off-by: Torsten Hilbrich <torsten.hilbrich@secunet.com> Reviewed-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2020-02-06vti[6]: fix packet tx through bpf_redirect() in XinY casesNicolas Dichtel1-7/+25
I forgot the 4in6/6in4 cases in my previous patch. Let's fix them. Fixes: 95224166a903 ("vti[6]: fix packet tx through bpf_redirect()") Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2020-01-14vti[6]: fix packet tx through bpf_redirect()Nicolas Dichtel1-2/+11
With an ebpf program that redirects packets through a vti[6] interface, the packets are dropped because no dst is attached. This could also be reproduced with an AF_PACKET socket, with the following python script (vti1 is an ip_vti interface): import socket send_s = socket.socket(socket.AF_PACKET, socket.SOCK_RAW, 0) # scapy # p = IP(src='10.100.0.2', dst='10.200.0.1')/ICMP(type='echo-request') # raw(p) req = b'E\x00\x00\x1c\x00\x01\x00\x00@\x01e\xb2\nd\x00\x02\n\xc8\x00\x01\x08\x00\xf7\xff\x00\x00\x00\x00' send_s.sendto(req, ('vti1', 0x800, 0, 0)) Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2019-12-24vti: do not confirm neighbor when do pmtu updateHangbin Liu1-1/+1
When do IPv6 tunnel PMTU update and calls __ip6_rt_update_pmtu() in the end, we should not call dst_confirm_neigh() as there is no two-way communication. Although vti and vti6 are immune to this problem because they are IFF_NOARP interfaces, as Guillaume pointed. There is still no sense to confirm neighbour here. v5: Update commit description. v4: No change. v3: Do not remove dst_confirm_neigh, but add a new bool parameter in dst_ops.update_pmtu to control whether we should do neighbor confirm. Also split the big patch to small ones for each area. v2: Remove dst_confirm_neigh in __ip6_rt_update_pmtu. Reviewed-by: Guillaume Nault <gnault@redhat.com> Acked-by: David Ahern <dsahern@gmail.com> Signed-off-by: Hangbin Liu <liuhangbin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-05-30treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152Thomas Gleixner1-5/+1
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-04-08xfrm: store xfrm_mode directly, not its addressFlorian Westphal1-1/+1
This structure is now only 4 bytes, so its more efficient to cache a copy rather than its address. No significant size difference in allmodconfig vmlinux. With non-modular kernel that has all XFRM options enabled, this series reduces vmlinux image size by ~11kb. All xfrm_mode indirections are gone and all modes are built-in. before (ipsec-next master): text data bss dec filename 21071494 7233140 11104324 39408958 vmlinux.master after this series: 21066448 7226772 11104324 39397544 vmlinux.patched With allmodconfig kernel, the size increase is only 362 bytes, even all the xfrm config options removed in this series are modular. before: text data bss dec filename 15731286 6936912 4046908 26715106 vmlinux.master after this series: 15731492 6937068 4046908 26715468 vmlinux Signed-off-by: Florian Westphal <fw@strlen.de> Reviewed-by: Sabrina Dubroca <sd@queasysnail.net> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2019-04-08xfrm: make xfrm modes builtinFlorian Westphal1-1/+1
after previous changes, xfrm_mode contains no function pointers anymore and all modules defining such struct contain no code except an init/exit functions to register the xfrm_mode struct with the xfrm core. Just place the xfrm modes core and remove the modules, the run-time xfrm_mode register/unregister functionality is removed. Before: text data bss dec filename 7523 200 2364 10087 net/xfrm/xfrm_input.o 40003 628 440 41071 net/xfrm/xfrm_state.o 15730338 6937080 4046908 26714326 vmlinux 7389 200 2364 9953 net/xfrm/xfrm_input.o 40574 656 440 41670 net/xfrm/xfrm_state.o 15730084 6937068 4046908 26714060 vmlinux The xfrm*_mode_{transport,tunnel,beet} modules are gone. v2: replace CONFIG_INET6_XFRM_MODE_* IS_ENABLED guards with CONFIG_IPV6 ones rather than removing them. Signed-off-by: Florian Westphal <fw@strlen.de> Reviewed-by: Sabrina Dubroca <sd@queasysnail.net> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2019-04-08xfrm: prefer family stored in xfrm_mode structFlorian Westphal1-1/+1
Now that we have the family available directly in the xfrm_mode struct, we can use that and avoid one extra dereference. Signed-off-by: Florian Westphal <fw@strlen.de> Reviewed-by: Sabrina Dubroca <sd@queasysnail.net> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2019-01-01ip: validate header length on virtual device xmitWillem de Bruijn1-4/+4
KMSAN detected read beyond end of buffer in vti and sit devices when passing truncated packets with PF_PACKET. The issue affects additional ip tunnel devices. Extend commit 76c0ddd8c3a6 ("ip6_tunnel: be careful when accessing the inner header") and commit ccfec9e5cb2d ("ip_tunnel: be careful when accessing the inner header"). Move the check to a separate helper and call at the start of each ndo_start_xmit function in net/ipv4 and net/ipv6. Minor changes: - convert dev_kfree_skb to kfree_skb on error path, as dev_kfree_skb calls consume_skb which is not for error paths. - use pskb_network_may_pull even though that is pedantic here, as the same as pskb_may_pull for devices without llheaders. - do not cache ipv6 hdrs if used only once (unsafe across pskb_may_pull, was more relevant to earlier patch) Reported-by: syzbot <syzkaller@googlegroups.com> Signed-off-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-12-21ipv6: tunnels: fix two use-after-freeEric Dumazet1-0/+1
xfrm6_policy_check() might have re-allocated skb->head, we need to reload ipv6 header pointer. sysbot reported : BUG: KASAN: use-after-free in __ipv6_addr_type+0x302/0x32f net/ipv6/addrconf_core.c:40 Read of size 4 at addr ffff888191b8cb70 by task syz-executor2/1304 CPU: 0 PID: 1304 Comm: syz-executor2 Not tainted 4.20.0-rc7+ #356 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 print_address_description.cold.7+0x9/0x1ff mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.8+0x242/0x309 mm/kasan/report.c:412 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:432 __ipv6_addr_type+0x302/0x32f net/ipv6/addrconf_core.c:40 ipv6_addr_type include/net/ipv6.h:403 [inline] ip6_tnl_get_cap+0x27/0x190 net/ipv6/ip6_tunnel.c:727 ip6_tnl_rcv_ctl+0xdb/0x2a0 net/ipv6/ip6_tunnel.c:757 vti6_rcv+0x336/0x8f3 net/ipv6/ip6_vti.c:321 xfrm6_ipcomp_rcv+0x1a5/0x3a0 net/ipv6/xfrm6_protocol.c:132 ip6_protocol_deliver_rcu+0x372/0x1940 net/ipv6/ip6_input.c:394 ip6_input_finish+0x84/0x170 net/ipv6/ip6_input.c:434 NF_HOOK include/linux/netfilter.h:289 [inline] ip6_input+0xe9/0x600 net/ipv6/ip6_input.c:443 IPVS: ftp: loaded support on port[0] = 21 ip6_mc_input+0x514/0x11c0 net/ipv6/ip6_input.c:537 dst_input include/net/dst.h:450 [inline] ip6_rcv_finish+0x17a/0x330 net/ipv6/ip6_input.c:76 NF_HOOK include/linux/netfilter.h:289 [inline] ipv6_rcv+0x115/0x640 net/ipv6/ip6_input.c:272 __netif_receive_skb_one_core+0x14d/0x200 net/core/dev.c:4973 __netif_receive_skb+0x2c/0x1e0 net/core/dev.c:5083 process_backlog+0x24e/0x7a0 net/core/dev.c:5923 napi_poll net/core/dev.c:6346 [inline] net_rx_action+0x7fa/0x19b0 net/core/dev.c:6412 __do_softirq+0x308/0xb7e kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1027 </IRQ> do_softirq.part.14+0x126/0x160 kernel/softirq.c:337 do_softirq+0x19/0x20 kernel/softirq.c:340 netif_rx_ni+0x521/0x860 net/core/dev.c:4569 dev_loopback_xmit+0x287/0x8c0 net/core/dev.c:3576 NF_HOOK include/linux/netfilter.h:289 [inline] ip6_finish_output2+0x193a/0x2930 net/ipv6/ip6_output.c:84 ip6_fragment+0x2b06/0x3850 net/ipv6/ip6_output.c:727 ip6_finish_output+0x6b7/0xc50 net/ipv6/ip6_output.c:152 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip6_output+0x232/0x9d0 net/ipv6/ip6_output.c:171 dst_output include/net/dst.h:444 [inline] ip6_local_out+0xc5/0x1b0 net/ipv6/output_core.c:176 ip6_send_skb+0xbc/0x340 net/ipv6/ip6_output.c:1727 ip6_push_pending_frames+0xc5/0xf0 net/ipv6/ip6_output.c:1747 rawv6_push_pending_frames net/ipv6/raw.c:615 [inline] rawv6_sendmsg+0x3a3e/0x4b40 net/ipv6/raw.c:945 kobject: 'queues' (0000000089e6eea2): kobject_add_internal: parent: 'tunl0', set: '<NULL>' kobject: 'queues' (0000000089e6eea2): kobject_uevent_env inet_sendmsg+0x1a1/0x690 net/ipv4/af_inet.c:798 kobject: 'queues' (0000000089e6eea2): kobject_uevent_env: filter function caused the event to drop! sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:631 sock_write_iter+0x35e/0x5c0 net/socket.c:900 call_write_iter include/linux/fs.h:1857 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x6b8/0x9f0 fs/read_write.c:487 kobject: 'rx-0' (00000000e2d902d9): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'rx-0' (00000000e2d902d9): kobject_uevent_env vfs_write+0x1fc/0x560 fs/read_write.c:549 ksys_write+0x101/0x260 fs/read_write.c:598 kobject: 'rx-0' (00000000e2d902d9): fill_kobj_path: path = '/devices/virtual/net/tunl0/queues/rx-0' __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 kobject: 'tx-0' (00000000443b70ac): kobject_add_internal: parent: 'queues', set: 'queues' entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457669 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f9bd200bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457669 RDX: 000000000000058f RSI: 00000000200033c0 RDI: 0000000000000003 kobject: 'tx-0' (00000000443b70ac): kobject_uevent_env RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9bd200c6d4 R13: 00000000004c2dcc R14: 00000000004da398 R15: 00000000ffffffff Allocated by task 1304: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:553 __do_kmalloc_node mm/slab.c:3684 [inline] __kmalloc_node_track_caller+0x50/0x70 mm/slab.c:3698 __kmalloc_reserve.isra.41+0x41/0xe0 net/core/skbuff.c:140 __alloc_skb+0x155/0x760 net/core/skbuff.c:208 kobject: 'tx-0' (00000000443b70ac): fill_kobj_path: path = '/devices/virtual/net/tunl0/queues/tx-0' alloc_skb include/linux/skbuff.h:1011 [inline] __ip6_append_data.isra.49+0x2f1a/0x3f50 net/ipv6/ip6_output.c:1450 ip6_append_data+0x1bc/0x2d0 net/ipv6/ip6_output.c:1619 rawv6_sendmsg+0x15ab/0x4b40 net/ipv6/raw.c:938 inet_sendmsg+0x1a1/0x690 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:631 ___sys_sendmsg+0x7fd/0x930 net/socket.c:2116 __sys_sendmsg+0x11d/0x280 net/socket.c:2154 __do_sys_sendmsg net/socket.c:2163 [inline] __se_sys_sendmsg net/socket.c:2161 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2161 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe kobject: 'gre0' (00000000cb1b2d7b): kobject_add_internal: parent: 'net', set: 'devices' Freed by task 1304: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kfree+0xcf/0x230 mm/slab.c:3817 skb_free_head+0x93/0xb0 net/core/skbuff.c:553 pskb_expand_head+0x3b2/0x10d0 net/core/skbuff.c:1498 __pskb_pull_tail+0x156/0x18a0 net/core/skbuff.c:1896 pskb_may_pull include/linux/skbuff.h:2188 [inline] _decode_session6+0xd11/0x14d0 net/ipv6/xfrm6_policy.c:150 __xfrm_decode_session+0x71/0x140 net/xfrm/xfrm_policy.c:3272 kobject: 'gre0' (00000000cb1b2d7b): kobject_uevent_env __xfrm_policy_check+0x380/0x2c40 net/xfrm/xfrm_policy.c:3322 __xfrm_policy_check2 include/net/xfrm.h:1170 [inline] xfrm_policy_check include/net/xfrm.h:1175 [inline] xfrm6_policy_check include/net/xfrm.h:1185 [inline] vti6_rcv+0x4bd/0x8f3 net/ipv6/ip6_vti.c:316 xfrm6_ipcomp_rcv+0x1a5/0x3a0 net/ipv6/xfrm6_protocol.c:132 ip6_protocol_deliver_rcu+0x372/0x1940 net/ipv6/ip6_input.c:394 ip6_input_finish+0x84/0x170 net/ipv6/ip6_input.c:434 NF_HOOK include/linux/netfilter.h:289 [inline] ip6_input+0xe9/0x600 net/ipv6/ip6_input.c:443 ip6_mc_input+0x514/0x11c0 net/ipv6/ip6_input.c:537 dst_input include/net/dst.h:450 [inline] ip6_rcv_finish+0x17a/0x330 net/ipv6/ip6_input.c:76 NF_HOOK include/linux/netfilter.h:289 [inline] ipv6_rcv+0x115/0x640 net/ipv6/ip6_input.c:272 __netif_receive_skb_one_core+0x14d/0x200 net/core/dev.c:4973 __netif_receive_skb+0x2c/0x1e0 net/core/dev.c:5083 process_backlog+0x24e/0x7a0 net/core/dev.c:5923 kobject: 'gre0' (00000000cb1b2d7b): fill_kobj_path: path = '/devices/virtual/net/gre0' napi_poll net/core/dev.c:6346 [inline] net_rx_action+0x7fa/0x19b0 net/core/dev.c:6412 __do_softirq+0x308/0xb7e kernel/softirq.c:292 The buggy address belongs to the object at ffff888191b8cac0 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 176 bytes inside of 512-byte region [ffff888191b8cac0, ffff888191b8ccc0) The buggy address belongs to the page: page:ffffea000646e300 count:1 mapcount:0 mapping:ffff8881da800940 index:0x0 flags: 0x2fffc0000000200(slab) raw: 02fffc0000000200 ffffea0006eaaa48 ffffea00065356c8 ffff8881da800940 raw: 0000000000000000 ffff888191b8c0c0 0000000100000006 0000000000000000 page dumped because: kasan: bad access detected kobject: 'queues' (000000005fd6226e): kobject_add_internal: parent: 'gre0', set: '<NULL>' Memory state around the buggy address: ffff888191b8ca00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888191b8ca80: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb >ffff888191b8cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888191b8cb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888191b8cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb Fixes: 0d3c703a9d17 ("ipv6: Cleanup IPv6 tunnel receive path") Fixes: ed1efb2aefbb ("ipv6: Add support for IPsec virtual tunnel interfaces") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-29vti6: remove !skb->ignore_df check from vti6_xmit()Alexey Kodanev1-1/+1
Before the commit d6990976af7c ("vti6: fix PMTU caching and reporting on xmit") '!skb->ignore_df' check was always true because the function skb_scrub_packet() was called before it, resetting ignore_df to zero. In the commit, skb_scrub_packet() was moved below, and now this check can be false for the packet, e.g. when sending it in the two fragments, this prevents successful PMTU updates in such case. The next attempts to send the packet lead to the same tx error. Moreover, vti6 initial MTU value relies on PMTU adjustments. This issue can be reproduced with the following LTP test script: udp_ipsec_vti.sh -6 -p ah -m tunnel -s 2000 Fixes: ccd740cbc6e0 ("vti6: Add pmtu handling to vti6_xmit.") Signed-off-by: Alexey Kodanev <alexey.kodanev@oracle.com> Acked-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-19ip6_vti: fix a null pointer deference when destroy vti6 tunnelHaishuang Yan1-1/+2
If load ip6_vti module and create a network namespace when set fb_tunnels_only_for_init_net to 1, then exit the namespace will cause following crash: [ 6601.677036] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 [ 6601.679057] PGD 8000000425eca067 P4D 8000000425eca067 PUD 424292067 PMD 0 [ 6601.680483] Oops: 0000 [#1] SMP PTI [ 6601.681223] CPU: 7 PID: 93 Comm: kworker/u16:1 Kdump: loaded Tainted: G E 4.18.0+ #3 [ 6601.683153] Hardware name: Fedora Project OpenStack Nova, BIOS seabios-1.7.5-11.el7 04/01/2014 [ 6601.684919] Workqueue: netns cleanup_net [ 6601.685742] RIP: 0010:vti6_exit_batch_net+0x87/0xd0 [ip6_vti] [ 6601.686932] Code: 7b 08 48 89 e6 e8 b9 ea d3 dd 48 8b 1b 48 85 db 75 ec 48 83 c5 08 48 81 fd 00 01 00 00 75 d5 49 8b 84 24 08 01 00 00 48 89 e6 <48> 8b 78 08 e8 90 ea d3 dd 49 8b 45 28 49 39 c6 4c 8d 68 d8 75 a1 [ 6601.690735] RSP: 0018:ffffa897c2737de0 EFLAGS: 00010246 [ 6601.691846] RAX: 0000000000000000 RBX: 0000000000000000 RCX: dead000000000200 [ 6601.693324] RDX: 0000000000000015 RSI: ffffa897c2737de0 RDI: ffffffff9f2ea9e0 [ 6601.694824] RBP: 0000000000000100 R08: 0000000000000000 R09: 0000000000000000 [ 6601.696314] R10: 0000000000000001 R11: 0000000000000000 R12: ffff8dc323c07e00 [ 6601.697812] R13: ffff8dc324a63100 R14: ffffa897c2737e30 R15: ffffa897c2737e30 [ 6601.699345] FS: 0000000000000000(0000) GS:ffff8dc33fdc0000(0000) knlGS:0000000000000000 [ 6601.701068] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 6601.702282] CR2: 0000000000000008 CR3: 0000000424966002 CR4: 00000000001606e0 [ 6601.703791] Call Trace: [ 6601.704329] cleanup_net+0x1b4/0x2c0 [ 6601.705268] process_one_work+0x16c/0x370 [ 6601.706145] worker_thread+0x49/0x3e0 [ 6601.706942] kthread+0xf8/0x130 [ 6601.707626] ? rescuer_thread+0x340/0x340 [ 6601.708476] ? kthread_bind+0x10/0x10 [ 6601.709266] ret_from_fork+0x35/0x40 Reproduce: modprobe ip6_vti echo 1 > /proc/sys/net/core/fb_tunnels_only_for_init_net unshare -n exit This because ip6n->tnls_wc[0] point to fallback device in default, but in non-default namespace, ip6n->tnls_wc[0] will be NULL, so add the NULL check comparatively. Fixes: e2948e5af8ee ("ip6_vti: fix creating fallback tunnel device for vti6") Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-19ip6_vti: fix creating fallback tunnel device for vti6Haishuang Yan1-0/+2
When set fb_tunnels_only_for_init_net to 1, don't create fallback tunnel device for vti6 when a new namespace is created. Tested: [root@builder2 ~]# modprobe ip6_tunnel [root@builder2 ~]# modprobe ip6_vti [root@builder2 ~]# echo 1 > /proc/sys/net/core/fb_tunnels_only_for_init_net [root@builder2 ~]# unshare -n [root@builder2 ~]# ip link 1: lo: <LOOPBACK> mtu 65536 qdisc noop state DOWN mode DEFAULT group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-18ip6_vti: simplify stats handling in vti6_xmitHaishuang Yan1-11/+3
Same as ip_vti, use iptunnel_xmit_stats to updates stats in tunnel xmit code path. Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-07vti6: fix PMTU caching and reporting on xmitEyal Birger1-5/+6
When setting the skb->dst before doing the MTU check, the route PMTU caching and reporting is done on the new dst which is about to be released. Instead, PMTU handling should be done using the original dst. This is aligned with IPv4 VTI. Fixes: ccd740cbc6 ("vti6: Add pmtu handling to vti6_xmit.") Signed-off-by: Eyal Birger <eyal.birger@gmail.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2018-05-11Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-2/+2
The bpf syscall and selftests conflicts were trivial overlapping changes. The r8169 change involved moving the added mdelay from 'net' into a different function. A TLS close bug fix overlapped with the splitting of the TLS state into separate TX and RX parts. I just expanded the tests in the bug fix from "ctx->conf == X" into "ctx->tx_conf == X && ctx->rx_conf == X". Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-01change the comment of vti6_ioctlSun Lianwen1-1/+1
The comment of vti6_ioctl() is wrong. which use vti6_tnl_ioctl instead of vti6_ioctl. Signed-off-by: Sun Lianwen <sunlw.fnst@cn.fujitsu.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2018-04-27vti6: Change minimum MTU to IPV4_MIN_MTU, vti6 can carry IPv4 tooStefano Brivio1-2/+2
A vti6 interface can carry IPv4 as well, so it makes no sense to enforce a minimum MTU of IPV6_MIN_MTU. If the user sets an MTU below IPV6_MIN_MTU, IPv6 will be disabled on the interface, courtesy of addrconf_notify(). Reported-by: Xin Long <lucien.xin@gmail.com> Fixes: b96f9afee4eb ("ipv4/6: use core net MTU range checking") Fixes: c6741fbed6dc ("vti6: Properly adjust vti6 MTU from MTU of lower device") Fixes: 53c81e95df17 ("ip6_vti: adjust vti mtu according to mtu of lower device") Signed-off-by: Stefano Brivio <sbrivio@redhat.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2018-04-05vti6: better validate user provided tunnel namesEric Dumazet1-2/+5
Use valid_name() to make sure user does not provide illegal device name. Fixes: ed1efb2aefbb ("ipv6: Add support for IPsec virtual tunnel interfaces") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-04-01Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-13/+23
Minor conflicts in drivers/net/ethernet/mellanox/mlx5/core/en_rep.c, we had some overlapping changes: 1) In 'net' MLX5E_PARAMS_LOG_{SQ,RQ}_SIZE --> MLX5E_REP_PARAMS_LOG_{SQ,RQ}_SIZE 2) In 'net-next' params->log_rq_size is renamed to be params->log_rq_mtu_frames. 3) In 'net-next' params->hard_mtu is added. Signed-off-by: David S. Miller <davem@davemloft.net>
2018-03-27net: Drop pernet_operations::asyncKirill Tkhai1-1/+0
Synchronous pernet_operations are not allowed anymore. All are asynchronous. So, drop the structure member. Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-03-19vti6: Fix dev->max_mtu settingStefano Brivio1-1/+1
We shouldn't allow a tunnel to have IP_MAX_MTU as MTU, because another IPv6 header is going on top of our packets. Without this patch, we might end up building packets bigger than IP_MAX_MTU. Fixes: b96f9afee4eb ("ipv4/6: use core net MTU range checking") Signed-off-by: Stefano Brivio <sbrivio@redhat.com> Acked-by: Sabrina Dubroca <sd@queasysnail.net> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2018-03-19vti6: Keep set MTU on link creation or change, validate itStefano Brivio1-8/+16
In vti6_link_config(), if MTU is already given on link creation or change, validate and use it instead of recomputing it. To do that, we need to propagate the knowledge that MTU was set by userspace all the way down to vti6_link_config(). To keep this simple, vti6_dev_init() sets the new 'keep_mtu' argument of vti6_link_config() to true: on initialization, we don't have convenient access to netlink attributes there, but we will anyway check whether dev->mtu is set in vti6_link_config(). If it's non-zero, it was set to the value of the IFLA_MTU attribute during creation. Otherwise, determine a reasonable value. Fixes: ed1efb2aefbb ("ipv6: Add support for IPsec virtual tunnel interfaces") Fixes: 53c81e95df17 ("ip6_vti: adjust vti mtu according to mtu of lower device") Signed-off-by: Stefano Brivio <sbrivio@redhat.com> Acked-by: Sabrina Dubroca <sd@queasysnail.net> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2018-03-19vti6: Properly adjust vti6 MTU from MTU of lower deviceStefano Brivio1-4/+6
If a lower device is found, we don't need to subtract LL_MAX_HEADER to calculate our MTU: just use its MTU, the link layer headers are already taken into account by it. If the lower device is not found, start from ETH_DATA_LEN instead, and only in this case subtract a worst-case LL_MAX_HEADER. We then need to subtract our additional IPv6 header from the calculation. While at it, note that vti6 doesn't have a hardware header, so it doesn't need to set dev->hard_header_len. And as vti6_link_config() now always sets the MTU, there's no need to set a default value in vti6_dev_setup(). This makes the behaviour consistent with IPv4 vti, after commit a32452366b72 ("vti4: Don't count header length twice."), which was accidentally reverted by merge commit f895f0cfbb77 ("Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec"). While commit 53c81e95df17 ("ip6_vti: adjust vti mtu according to mtu of lower device") improved on the original situation, this was still not ideal. As reported in that commit message itself, if we start from an underlying veth MTU of 9000, we end up with an MTU of 8832, that is, 9000 - LL_MAX_HEADER - sizeof(ipv6hdr). This should simply be 8880, or 9000 - sizeof(ipv6hdr) instead: we found the lower device (veth) and we know we don't have any additional link layer header, so there's no need to subtract an hypothetical worst-case number. Fixes: 53c81e95df17 ("ip6_vti: adjust vti mtu according to mtu of lower device") Signed-off-by: Stefano Brivio <sbrivio@redhat.com> Acked-by: Sabrina Dubroca <sd@queasysnail.net> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2018-03-04net/ipv6: Pass skb to route lookupDavid Ahern1-1/+1
IPv6 does path selection for multipath routes deep in the lookup functions. The next patch adds L4 hash option and needs the skb for the forward path. To get the skb to the relevant FIB lookup functions it needs to go through the fib rules layer, so add a lookup_data argument to the fib_lookup_arg struct. Signed-off-by: David Ahern <dsahern@gmail.com> Reviewed-by: Ido Schimmel <idosch@mellanox.com> Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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