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* Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski2024-02-291-2/+2
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Cross-merge networking fixes after downstream PR. Conflicts: net/mptcp/protocol.c adf1bb78dab5 ("mptcp: fix snd_wnd initialization for passive socket") 9426ce476a70 ("mptcp: annotate lockless access for RX path fields") https://lore.kernel.org/all/20240228103048.19255709@canb.auug.org.au/ Adjacent changes: drivers/dpll/dpll_core.c 0d60d8df6f49 ("dpll: rely on rcu for netdev_dpll_pin()") e7f8df0e81bf ("dpll: move xa_erase() call in to match dpll_pin_alloc() error path order") drivers/net/veth.c 1ce7d306ea63 ("veth: try harder when allocating queue memory") 0bef512012b1 ("net: add netdev_lockdep_set_classes() to virtual drivers") drivers/net/wireless/intel/iwlwifi/mvm/d3.c 8c9bef26e98b ("wifi: iwlwifi: mvm: d3: implement suspend with MLO") 78f65fbf421a ("wifi: iwlwifi: mvm: ensure offloading TID queue exists") net/wireless/nl80211.c f78c1375339a ("wifi: nl80211: reject iftype change with mesh ID change") 414532d8aa89 ("wifi: cfg80211: use IEEE80211_MAX_MESH_ID_LEN appropriately") Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| * net: hsr: Use correct offset for HSR TLV values in supervisory HSR framesLukasz Majewski2024-02-291-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Current HSR implementation uses following supervisory frame (even for HSRv1 the HSR tag is not is not present): 00000000: 01 15 4e 00 01 2d XX YY ZZ 94 77 10 88 fb 00 01 00000010: 7e 1c 17 06 XX YY ZZ 94 77 10 1e 06 XX YY ZZ 94 00000020: 77 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00000030: 00 00 00 00 00 00 00 00 00 00 00 00 The current code adds extra two bytes (i.e. sizeof(struct hsr_sup_tlv)) when offset for skb_pull() is calculated. This is wrong, as both 'struct hsrv1_ethhdr_sp' and 'hsrv0_ethhdr_sp' already have 'struct hsr_sup_tag' defined in them, so there is no need for adding extra two bytes. This code was working correctly as with no RedBox support, the check for HSR_TLV_EOT (0x00) was off by two bytes, which were corresponding to zeroed padded bytes for minimal packet size. Fixes: eafaa88b3eb7 ("net: hsr: Add support for redbox supervision frames") Signed-off-by: Lukasz Majewski <lukma@denx.de> Reviewed-by: Jiri Pirko <jiri@nvidia.com> Link: https://lore.kernel.org/r/20240228085644.3618044-1-lukma@denx.de Signed-off-by: Paolo Abeni <pabeni@redhat.com>
| * net: hsr: Fix typo in the hsr_forward_do() function commentLukasz Majewski2024-02-281-1/+1
| | | | | | | | | | | | | | | | Correct type in the hsr_forward_do() comment. Signed-off-by: Lukasz Majewski <lukma@denx.de> Reviewed-by: Jiri Pirko <jiri@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: hsr: constify the struct device_type usageRicardo B. Marliere2024-02-211-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | Since commit aed65af1cc2f ("drivers: make device_type const"), the driver core can properly handle constant struct device_type. Move the hsr_type variable to be a constant structure as well, placing it into read-only memory which can not be modified at runtime. Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Ricardo B. Marliere <ricardo@marliere.net> Reviewed-by: Simon Horman <horms@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: add netdev_set_operstate() helperEric Dumazet2024-02-141-16/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | dev_base_lock is going away, add netdev_set_operstate() helper so that hsr does not have to know core internals. Remove dev_base_lock acquisition from rfc2863_policy() v3: use an "unsigned int" for dev->operstate, so that try_cmpxchg() can work on all arches. ( https://lore.kernel.org/oe-kbuild-all/202402081918.OLyGaea3-lkp@intel.com/ ) Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net-sysfs: convert dev->operstate reads to lockless onesEric Dumazet2024-02-141-5/+5
|/ | | | | | | | | | | | operstate_show() can omit dev_base_lock acquisition only to read dev->operstate. Annotate accesses to dev->operstate. Writers still acquire dev_base_lock for mutual exclusion. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: hsr: remove WARN_ONCE() in send_hsr_supervision_frame()Nikita Zhandarovich2024-01-291-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Syzkaller reported [1] hitting a warning after failing to allocate resources for skb in hsr_init_skb(). Since a WARN_ONCE() call will not help much in this case, it might be prudent to switch to netdev_warn_once(). At the very least it will suppress syzkaller reports such as [1]. Just in case, use netdev_warn_once() in send_prp_supervision_frame() for similar reasons. [1] HSR: Could not send supervision frame WARNING: CPU: 1 PID: 85 at net/hsr/hsr_device.c:294 send_hsr_supervision_frame+0x60a/0x810 net/hsr/hsr_device.c:294 RIP: 0010:send_hsr_supervision_frame+0x60a/0x810 net/hsr/hsr_device.c:294 ... Call Trace: <IRQ> hsr_announce+0x114/0x370 net/hsr/hsr_device.c:382 call_timer_fn+0x193/0x590 kernel/time/timer.c:1700 expire_timers kernel/time/timer.c:1751 [inline] __run_timers+0x764/0xb20 kernel/time/timer.c:2022 run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035 __do_softirq+0x21a/0x8de kernel/softirq.c:553 invoke_softirq kernel/softirq.c:427 [inline] __irq_exit_rcu kernel/softirq.c:632 [inline] irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644 sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1076 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649 ... This issue is also found in older kernels (at least up to 5.10). Cc: stable@vger.kernel.org Reported-by: syzbot+3ae0a3f42c84074b7c8e@syzkaller.appspotmail.com Fixes: 121c33b07b31 ("net: hsr: introduce common code for skb initialization") Signed-off-by: Nikita Zhandarovich <n.zhandarovich@fintech.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: fill in MODULE_DESCRIPTION()s for HSRBreno Leitao2024-01-121-0/+1
| | | | | | | | | W=1 builds now warn if module is built without a MODULE_DESCRIPTION(). Add descriptions to High-availability Seamless Redundancy (HSR) driver. Signed-off-by: Breno Leitao <leitao@debian.org> Link: https://lore.kernel.org/r/20240108181610.2697017-4-leitao@debian.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* net: hsr: Add support for MC filtering at the slave deviceMurali Karicheri2023-11-221-1/+66
| | | | | | | | | | | | | | | When MC (multicast) list is updated by the networking layer due to a user command and as well as when allmulti flag is set, it needs to be passed to the enslaved Ethernet devices. This patch allows this to happen by implementing ndo_change_rx_flags() and ndo_set_rx_mode() API calls that in turns pass it to the slave devices using existing API calls. Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: Ravi Gunasekaran <r-gunasekaran@ti.com> Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com> Reviewed-by: Simon Horman <horms@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* hsr: Prevent use after free in prp_create_tagged_frame()Dan Carpenter2023-11-021-3/+1
| | | | | | | | | | | | | The prp_fill_rct() function can fail. In that situation, it frees the skb and returns NULL. Meanwhile on the success path, it returns the original skb. So it's straight forward to fix bug by using the returned value. Fixes: 451d8123f897 ("net: prp: add packet handling support") Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org> Acked-by: Paolo Abeni <pabeni@redhat.com> Link: https://lore.kernel.org/r/57af1f28-7f57-4a96-bcd3-b7a0f2340845@moroto.mountain Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* net: hsr: Add __packed to struct hsr_sup_tlv.Sebastian Andrzej Siewior2023-09-181-1/+1
| | | | | | | | | | | | Struct hsr_sup_tlv describes HW layout and therefore it needs a __packed attribute to ensure the compiler does not add any padding. Due to the size and __packed attribute of the structs that use hsr_sup_tlv it has no functional impact. Add __packed to struct hsr_sup_tlv. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: hsr: Properly parse HSRv1 supervisor frames.Lukasz Majewski2023-09-181-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | While adding support for parsing the redbox supervision frames, the author added `pull_size' and `total_pull_size' to track the amount of bytes that were pulled from the skb during while parsing the skb so it can be reverted/ pushed back at the end. In the process probably copy&paste error occurred and for the HSRv1 case the ethhdr was used instead of the hsr_tag. Later the hsr_tag was used instead of hsr_sup_tag. The later error didn't matter because both structs have the size so HSRv0 was still working. It broke however HSRv1 parsing because struct ethhdr is larger than struct hsr_tag. Reinstate the old pulling flow and pull first ethhdr, hsr_tag in v1 case followed by hsr_sup_tag. [bigeasy: commit message] Fixes: eafaa88b3eb7 ("net: hsr: Add support for redbox supervision frames")' Suggested-by: Tristram.Ha@microchip.com Signed-off-by: Lukasz Majewski <lukma@denx.de> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
* hsr: Fix uninit-value access in fill_frame_info()Ziyang Xuan2023-09-111-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Syzbot reports the following uninit-value access problem. ===================================================== BUG: KMSAN: uninit-value in fill_frame_info net/hsr/hsr_forward.c:601 [inline] BUG: KMSAN: uninit-value in hsr_forward_skb+0x9bd/0x30f0 net/hsr/hsr_forward.c:616 fill_frame_info net/hsr/hsr_forward.c:601 [inline] hsr_forward_skb+0x9bd/0x30f0 net/hsr/hsr_forward.c:616 hsr_dev_xmit+0x192/0x330 net/hsr/hsr_device.c:223 __netdev_start_xmit include/linux/netdevice.h:4889 [inline] netdev_start_xmit include/linux/netdevice.h:4903 [inline] xmit_one net/core/dev.c:3544 [inline] dev_hard_start_xmit+0x247/0xa10 net/core/dev.c:3560 __dev_queue_xmit+0x34d0/0x52a0 net/core/dev.c:4340 dev_queue_xmit include/linux/netdevice.h:3082 [inline] packet_xmit+0x9c/0x6b0 net/packet/af_packet.c:276 packet_snd net/packet/af_packet.c:3087 [inline] packet_sendmsg+0x8b1d/0x9f30 net/packet/af_packet.c:3119 sock_sendmsg_nosec net/socket.c:730 [inline] sock_sendmsg net/socket.c:753 [inline] __sys_sendto+0x781/0xa30 net/socket.c:2176 __do_sys_sendto net/socket.c:2188 [inline] __se_sys_sendto net/socket.c:2184 [inline] __ia32_sys_sendto+0x11f/0x1c0 net/socket.c:2184 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246 entry_SYSENTER_compat_after_hwframe+0x70/0x82 Uninit was created at: slab_post_alloc_hook+0x12f/0xb70 mm/slab.h:767 slab_alloc_node mm/slub.c:3478 [inline] kmem_cache_alloc_node+0x577/0xa80 mm/slub.c:3523 kmalloc_reserve+0x148/0x470 net/core/skbuff.c:559 __alloc_skb+0x318/0x740 net/core/skbuff.c:644 alloc_skb include/linux/skbuff.h:1286 [inline] alloc_skb_with_frags+0xc8/0xbd0 net/core/skbuff.c:6299 sock_alloc_send_pskb+0xa80/0xbf0 net/core/sock.c:2794 packet_alloc_skb net/packet/af_packet.c:2936 [inline] packet_snd net/packet/af_packet.c:3030 [inline] packet_sendmsg+0x70e8/0x9f30 net/packet/af_packet.c:3119 sock_sendmsg_nosec net/socket.c:730 [inline] sock_sendmsg net/socket.c:753 [inline] __sys_sendto+0x781/0xa30 net/socket.c:2176 __do_sys_sendto net/socket.c:2188 [inline] __se_sys_sendto net/socket.c:2184 [inline] __ia32_sys_sendto+0x11f/0x1c0 net/socket.c:2184 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246 entry_SYSENTER_compat_after_hwframe+0x70/0x82 It is because VLAN not yet supported in hsr driver. Return error when protocol is ETH_P_8021Q in fill_frame_info() now to fix it. Fixes: 451d8123f897 ("net: prp: add packet handling support") Reported-by: syzbot+bf7e6250c7ce248f3ec9@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=bf7e6250c7ce248f3ec9 Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net/hsr: Remove unused function declarationsYue Haibing2023-08-011-2/+0
| | | | | | | | | | commit f421436a591d ("net/hsr: Add support for the High-availability Seamless Redundancy protocol (HSRv0)") introducted these but never implemented. Signed-off-by: Yue Haibing <yuehaibing@huawei.com> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://lore.kernel.org/r/20230729123456.36340-1-yuehaibing@huawei.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* net: hsr: Disable promiscuous mode in offload modeRavi Gunasekaran2023-06-223-4/+17
| | | | | | | | | | | When port-to-port forwarding for interfaces in HSR node is enabled, disable promiscuous mode since L2 frame forward happens at the offloaded hardware. Signed-off-by: Ravi Gunasekaran <r-gunasekaran@ti.com> Reviewed-by: Simon Horman <simon.horman@corigine.com> Link: https://lore.kernel.org/r/20230614114710.31400-1-r-gunasekaran@ti.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* hsr: ratelimit only when errors are printedMatthieu Baerts2023-03-171-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | Recently, when automatically merging -net and net-next in MPTCP devel tree, our CI reported [1] a conflict in hsr, the same as the one reported by Stephen in netdev [2]. When looking at the conflict, I noticed it is in fact the v1 [3] that has been applied in -net and the v2 [4] in net-next. Maybe the v1 was applied by accident. As mentioned by Jakub Kicinski [5], the new condition makes more sense before the net_ratelimit(), not to update net_ratelimit's state which is unnecessary if we're not going to print either way. Here, this modification applies the v2 but in -net. Link: https://github.com/multipath-tcp/mptcp_net-next/actions/runs/4423171069 [1] Link: https://lore.kernel.org/netdev/20230315100914.53fc1760@canb.auug.org.au/ [2] Link: https://lore.kernel.org/netdev/20230307133229.127442-1-koverskeid@gmail.com/ [3] Link: https://lore.kernel.org/netdev/20230309092302.179586-1-koverskeid@gmail.com/ [4] Link: https://lore.kernel.org/netdev/20230308232001.2fb62013@kernel.org/ [5] Fixes: 28e8cabe80f3 ("net: hsr: Don't log netdev_err message on unknown prp dst node") Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net> Reviewed-by: Steen Hegelund <Steen.Hegelund@microchip.com> Link: https://lore.kernel.org/r/20230315-net-20230315-hsr_framereg-ratelimit-v1-1-61d2ef176d11@tessares.net Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* net: hsr: Don't log netdev_err message on unknown prp dst nodeKristian Overskeid2023-03-141-1/+1
| | | | | | | | | | | | | If no frames has been exchanged with a node for HSR_NODE_FORGET_TIME, the node will be deleted from the node_db list. If a frame is sent to the node after it is deleted, a netdev_err message for each slave interface is produced. This should not happen with dan nodes because of supervision frames, but can happen often with san nodes, which clutters the kernel log. Since the hsr protocol does not support sans, this is only relevant for the prp protocol. Signed-off-by: Kristian Overskeid <koverskeid@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* hsr: Use a single struct for self_node.Sebastian Andrzej Siewior2022-12-023-37/+35
| | | | | | | | | | | | | | | self_node_db is a list_head with one entry of struct hsr_node. The purpose is to hold the two MAC addresses of the node itself. It is convenient to recycle the structure. However having a list_head and fetching always the first entry is not really optimal. Created a new data strucure contaning the two MAC addresses named hsr_self_node. Access that structure like an RCU protected pointer so it can be replaced on the fly without blocking the reader. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Reviewed-by: Kurt Kanzenbach <kurt@linutronix.de> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* hsr: Synchronize sequence number updates.Sebastian Andrzej Siewior2022-12-022-1/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | hsr_register_frame_out() compares new sequence_nr vs the old one recorded in hsr_node::seq_out and if the new sequence_nr is higher then it will be written to hsr_node::seq_out as the new value. This operation isn't locked so it is possible that two frames with the same sequence number arrive (via the two slave devices) and are fed to hsr_register_frame_out() at the same time. Both will pass the check and update the sequence counter later to the same value. As a result the content of the same packet is fed into the stack twice. This was noticed by running ping and observing DUP being reported from time to time. Instead of using the hsr_priv::seqnr_lock for the whole receive path (as it is for sending in the master node) add an additional lock that is only used for sequence number checks and updates. Add a per-node lock that is used during sequence number reads and updates. Fixes: f421436a591d3 ("net/hsr: Add support for the High-availability Seamless Redundancy protocol (HSRv0)") Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* hsr: Synchronize sending frames to have always incremented outgoing seq nr.Sebastian Andrzej Siewior2022-12-022-7/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Sending frames via the hsr (master) device requires a sequence number which is tracked in hsr_priv::sequence_nr and protected by hsr_priv::seqnr_lock. Each time a new frame is sent, it will obtain a new id and then send it via the slave devices. Each time a packet is sent (via hsr_forward_do()) the sequence number is checked via hsr_register_frame_out() to ensure that a frame is not handled twice. This make sense for the receiving side to ensure that the frame is not injected into the stack twice after it has been received from both slave ports. There is no locking to cover the sending path which means the following scenario is possible: CPU0 CPU1 hsr_dev_xmit(skb1) hsr_dev_xmit(skb2) fill_frame_info() fill_frame_info() hsr_fill_frame_info() hsr_fill_frame_info() handle_std_frame() handle_std_frame() skb1's sequence_nr = 1 skb2's sequence_nr = 2 hsr_forward_do() hsr_forward_do() hsr_register_frame_out(, 2) // okay, send) hsr_register_frame_out(, 1) // stop, lower seq duplicate Both skbs (or their struct hsr_frame_info) received an unique id. However since skb2 was sent before skb1, the higher sequence number was recorded in hsr_register_frame_out() and the late arriving skb1 was dropped and never sent. This scenario has been observed in a three node HSR setup, with node1 + node2 having ping and iperf running in parallel. From time to time ping reported a missing packet. Based on tracing that missing ping packet did not leave the system. It might be possible (didn't check) to drop the sequence number check on the sending side. But if the higher sequence number leaves on wire before the lower does and the destination receives them in that order and it will drop the packet with the lower sequence number and never inject into the stack. Therefore it seems the only way is to lock the whole path from obtaining the sequence number and sending via dev_queue_xmit() and assuming the packets leave on wire in the same order (and don't get reordered by the NIC). Cover the whole path for the master interface from obtaining the ID until after it has been forwarded via hsr_forward_skb() to ensure the skbs are sent to the NIC in the order of the assigned sequence numbers. Fixes: f421436a591d3 ("net/hsr: Add support for the High-availability Seamless Redundancy protocol (HSRv0)") Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* hsr: Disable netpoll.Sebastian Andrzej Siewior2022-12-022-11/+8
| | | | | | | | | | | | | | | | | | | | The hsr device is a software device. Its net_device_ops::ndo_start_xmit() routine will process the packet and then pass the resulting skb to dev_queue_xmit(). During processing, hsr acquires a lock with spin_lock_bh() (hsr_add_node()) which needs to be promoted to the _irq() suffix in order to avoid a potential deadlock. Then there are the warnings in dev_queue_xmit() (due to local_bh_disable() with disabled interrupts) left. Instead trying to address those (there is qdisc and…) for netpoll sake, just disable netpoll on hsr. Disable netpoll on hsr and replace the _irqsave() locking with _bh(). Fixes: f421436a591d3 ("net/hsr: Add support for the High-availability Seamless Redundancy protocol (HSRv0)") Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* hsr: Avoid double remove of a node.Sebastian Andrzej Siewior2022-12-022-5/+12
| | | | | | | | | | | | | | | | | | | | | | | Due to the hashed-MAC optimisation one problem become visible: hsr_handle_sup_frame() walks over the list of available nodes and merges two node entries into one if based on the information in the supervision both MAC addresses belong to one node. The list-walk happens on a RCU protected list and delete operation happens under a lock. If the supervision arrives on both slave interfaces at the same time then this delete operation can occur simultaneously on two CPUs. The result is the first-CPU deletes the from the list and the second CPUs BUGs while attempting to dereference a poisoned list-entry. This happens more likely with the optimisation because a new node for the mac_B entry is created once a packet has been received and removed (merged) once the supervision frame has been received. Avoid removing/ cleaning up a hsr_node twice by adding a `removed' field which is set to true after the removal and checked before the removal. Fixes: f266a683a4804 ("net/hsr: Better frame dispatch") Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* hsr: Add a rcu-read lock to hsr_forward_skb().Sebastian Andrzej Siewior2022-12-021-0/+3
| | | | | | | | | | | | | | | hsr_forward_skb() a skb and keeps information in an on-stack hsr_frame_info. hsr_get_node() assigns hsr_frame_info::node_src which is from a RCU list. This pointer is used later in hsr_forward_do(). I don't see a reason why this pointer can't vanish midway since there is no guarantee that hsr_forward_skb() is invoked from an RCU read section. Use rcu_read_lock() to protect hsr_frame_info::node_src from its assignment until it is no longer used. Fixes: f266a683a4804 ("net/hsr: Better frame dispatch") Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* Revert "net: hsr: use hlist_head instead of list_head for mac addresses"Sebastian Andrzej Siewior2022-12-027-187/+106
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The hlist optimisation (which not only uses hlist_head instead of list_head but also splits hsr_priv::node_db into an array of 256 slots) does not consider the "node merge": Upon starting the hsr network (with three nodes) a packet that is sent from node1 to node3 will also be sent from node1 to node2 and then forwarded to node3. As a result node3 will receive 2 packets because it is not able to filter out the duplicate. Each packet received will create a new struct hsr_node with macaddress_A only set the MAC address it received from (the two MAC addesses from node1). At some point (early in the process) two supervision frames will be received from node1. They will be processed by hsr_handle_sup_frame() and one frame will leave early ("Node has already been merged") and does nothing. The other frame will be merged as portB and have its MAC address written to macaddress_B and the hsr_node (that was created for it as macaddress_A) will be removed. From now on HSR is able to identify a duplicate because both packets sent from one node will result in the same struct hsr_node because hsr_get_node() will find the MAC address either on macaddress_A or macaddress_B. Things get tricky with the optimisation: If sender's MAC address is saved as macaddress_A then the lookup will work as usual. If the MAC address has been merged into macaddress_B of another hsr_node then the lookup won't work because it is likely that the data structure is in another bucket. This results in creating a new struct hsr_node and not recognising a possible duplicate. A way around it would be to add another hsr_node::mac_list_B and attach it to the other bucket to ensure that this hsr_node will be looked up either via macaddress_A _or_ macaddress_B. I however prefer to revert it because it sounds like an academic problem rather than real life workload plus it adds complexity. I'm not an HSR expert with what is usual size of a network but I would guess 40 to 60 nodes. With 10.000 nodes and assuming 60us for pass-through (from node to node) then it would take almost 600ms for a packet to almost wrap around which sounds a lot. Revert the hash MAC addresses optimisation. Fixes: 4acc45db71158 ("net: hsr: use hlist_head instead of list_head for mac addresses") Cc: Juhee Kang <claudiajkang@gmail.com> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* net: hsr: Fix potential use-after-freeYueHaibing2022-11-291-2/+3
| | | | | | | | | | The skb is delivered to netif_rx() which may free it, after calling this, dereferencing skb may trigger use-after-free. Fixes: f421436a591d ("net/hsr: Add support for the High-availability Seamless Redundancy protocol (HSRv0)") Signed-off-by: YueHaibing <yuehaibing@huawei.com> Link: https://lore.kernel.org/r/20221125075724.27912-1-yuehaibing@huawei.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* net: hsr: avoid possible NULL deref in skb_clone()Eric Dumazet2022-10-191-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | syzbot got a crash [1] in skb_clone(), caused by a bug in hsr_get_untagged_frame(). When/if create_stripped_skb_hsr() returns NULL, we must not attempt to call skb_clone(). While we are at it, replace a WARN_ONCE() by netdev_warn_once(). [1] general protection fault, probably for non-canonical address 0xdffffc000000000f: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000078-0x000000000000007f] CPU: 1 PID: 754 Comm: syz-executor.0 Not tainted 6.0.0-syzkaller-02734-g0326074ff465 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 RIP: 0010:skb_clone+0x108/0x3c0 net/core/skbuff.c:1641 Code: 93 02 00 00 49 83 7c 24 28 00 0f 85 e9 00 00 00 e8 5d 4a 29 fa 4c 8d 75 7e 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <0f> b6 04 02 4c 89 f2 83 e2 07 38 d0 7f 08 84 c0 0f 85 9e 01 00 00 RSP: 0018:ffffc90003ccf4e0 EFLAGS: 00010207 RAX: dffffc0000000000 RBX: ffffc90003ccf5f8 RCX: ffffc9000c24b000 RDX: 000000000000000f RSI: ffffffff8751cb13 RDI: 0000000000000000 RBP: 0000000000000000 R08: 00000000000000f0 R09: 0000000000000140 R10: fffffbfff181d972 R11: 0000000000000000 R12: ffff888161fc3640 R13: 0000000000000a20 R14: 000000000000007e R15: ffffffff8dc5f620 FS: 00007feb621e4700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007feb621e3ff8 CR3: 00000001643a9000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> hsr_get_untagged_frame+0x4e/0x610 net/hsr/hsr_forward.c:164 hsr_forward_do net/hsr/hsr_forward.c:461 [inline] hsr_forward_skb+0xcca/0x1d50 net/hsr/hsr_forward.c:623 hsr_handle_frame+0x588/0x7c0 net/hsr/hsr_slave.c:69 __netif_receive_skb_core+0x9fe/0x38f0 net/core/dev.c:5379 __netif_receive_skb_one_core+0xae/0x180 net/core/dev.c:5483 __netif_receive_skb+0x1f/0x1c0 net/core/dev.c:5599 netif_receive_skb_internal net/core/dev.c:5685 [inline] netif_receive_skb+0x12f/0x8d0 net/core/dev.c:5744 tun_rx_batched+0x4ab/0x7a0 drivers/net/tun.c:1544 tun_get_user+0x2686/0x3a00 drivers/net/tun.c:1995 tun_chr_write_iter+0xdb/0x200 drivers/net/tun.c:2025 call_write_iter include/linux/fs.h:2187 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x9e9/0xdd0 fs/read_write.c:584 ksys_write+0x127/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Fixes: f266a683a480 ("net/hsr: Better frame dispatch") Reported-by: syzbot <syzkaller@googlegroups.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Link: https://lore.kernel.org/r/20221017165928.2150130-1-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* genetlink: start to validate reserved header bytesJakub Kicinski2022-08-291-0/+1
| | | | | | | | | | | | | | | | | We had historically not checked that genlmsghdr.reserved is 0 on input which prevents us from using those precious bytes in the future. One use case would be to extend the cmd field, which is currently just 8 bits wide and 256 is not a lot of commands for some core families. To make sure that new families do the right thing by default put the onus of opting out of validation on existing families. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Acked-by: Paul Moore <paul@paul-moore.com> (NetLabel) Signed-off-by: David S. Miller <davem@davemloft.net>
* treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_30.RULE ↵Thomas Gleixner2022-06-101-9/+1
| | | | | | | | | | | | | | | | | | | | | | | (part 2) Based on the normalized pattern: 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 version 2 this program is distributed as is without any warranty of any kind whether express or implied without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference. Reviewed-by: Allison Randal <allison@lohutok.net> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* net: add per-cpu storage and net->core_statsEric Dumazet2022-03-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | Before adding yet another possibly contended atomic_long_t, it is time to add per-cpu storage for existing ones: dev->tx_dropped, dev->rx_dropped, and dev->rx_nohandler Because many devices do not have to increment such counters, allocate the per-cpu storage on demand, so that dev_get_stats() does not have to spend considerable time folding zero counters. Note that some drivers have abused these counters which were supposed to be only used by core networking stack. v4: should use per_cpu_ptr() in dev_get_stats() (Jakub) v3: added a READ_ONCE() in netdev_core_stats_alloc() (Paolo) v2: add a missing include (reported by kernel test robot <lkp@intel.com>) Change in netdev_core_stats_alloc() (Jakub) Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: jeffreyji <jeffreyji@google.com> Reviewed-by: Brian Vazquez <brianvv@google.com> Reviewed-by: Jakub Kicinski <kuba@kernel.org> Acked-by: Paolo Abeni <pabeni@redhat.com> Link: https://lore.kernel.org/r/20220311051420.2608812-1-eric.dumazet@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* flow_dissector: Add support for HSRKurt Kanzenbach2022-03-031-16/+0
| | | | | | | | | | | | | | | | | | Network drivers such as igb or igc call eth_get_headlen() to determine the header length for their to be constructed skbs in receive path. When running HSR on top of these drivers, it results in triggering BUG_ON() in skb_pull(). The reason is the skb headlen is not sufficient for HSR to work correctly. skb_pull() notices that. For instance, eth_get_headlen() returns 14 bytes for TCP traffic over HSR which is not correct. The problem is, the flow dissection code does not take HSR into account. Therefore, add support for it. Reported-by: Anthony Harivel <anthony.harivel@linutronix.de> Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de> Link: https://lore.kernel.org/r/20220228195856.88187-1-kurt@linutronix.de Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* net: hsr: fix hsr build error when lockdep is not enabledJuhee Kang2022-02-222-11/+22
| | | | | | | | | | | | | | | | | In hsr, lockdep_is_held() is needed for rcu_dereference_bh_check(). But if lockdep is not enabled, lockdep_is_held() causes a build error: ERROR: modpost: "lockdep_is_held" [net/hsr/hsr.ko] undefined! Thus, this patch solved by adding lockdep_hsr_is_held(). This helper function calls the lockdep_is_held() when lockdep is enabled, and returns 1 if not defined. Fixes: e7f27420681f ("net: hsr: fix suspicious RCU usage warning in hsr_node_get_first()") Reported-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Juhee Kang <claudiajkang@gmail.com> Link: https://lore.kernel.org/r/20220220153250.5285-1-claudiajkang@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* net: hsr: fix suspicious RCU usage warning in hsr_node_get_first()Juhee Kang2022-02-192-7/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When hsr_create_self_node() calls hsr_node_get_first(), the suspicious RCU usage warning is occurred. The reason why this warning is raised is the callers of hsr_node_get_first() use rcu_read_lock_bh() and other different synchronization mechanisms. Thus, this patch solved by replacing rcu_dereference() with rcu_dereference_bh_check(). The kernel test robot reports: [ 50.083470][ T3596] ============================= [ 50.088648][ T3596] WARNING: suspicious RCU usage [ 50.093785][ T3596] 5.17.0-rc3-next-20220208-syzkaller #0 Not tainted [ 50.100669][ T3596] ----------------------------- [ 50.105513][ T3596] net/hsr/hsr_framereg.c:34 suspicious rcu_dereference_check() usage! [ 50.113799][ T3596] [ 50.113799][ T3596] other info that might help us debug this: [ 50.113799][ T3596] [ 50.124257][ T3596] [ 50.124257][ T3596] rcu_scheduler_active = 2, debug_locks = 1 [ 50.132368][ T3596] 2 locks held by syz-executor.0/3596: [ 50.137863][ T3596] #0: ffffffff8d3357e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3be/0xb80 [ 50.147470][ T3596] #1: ffff88807ec9d5f0 (&hsr->list_lock){+...}-{2:2}, at: hsr_create_self_node+0x225/0x650 [ 50.157623][ T3596] [ 50.157623][ T3596] stack backtrace: [ 50.163510][ T3596] CPU: 1 PID: 3596 Comm: syz-executor.0 Not tainted 5.17.0-rc3-next-20220208-syzkaller #0 [ 50.173381][ T3596] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.183623][ T3596] Call Trace: [ 50.186904][ T3596] <TASK> [ 50.189844][ T3596] dump_stack_lvl+0xcd/0x134 [ 50.194640][ T3596] hsr_node_get_first+0x9b/0xb0 [ 50.199499][ T3596] hsr_create_self_node+0x22d/0x650 [ 50.204688][ T3596] hsr_dev_finalize+0x2c1/0x7d0 [ 50.209669][ T3596] hsr_newlink+0x315/0x730 [ 50.214113][ T3596] ? hsr_dellink+0x130/0x130 [ 50.218789][ T3596] ? rtnl_create_link+0x7e8/0xc00 [ 50.223803][ T3596] ? hsr_dellink+0x130/0x130 [ 50.228397][ T3596] __rtnl_newlink+0x107c/0x1760 [ 50.233249][ T3596] ? rtnl_setlink+0x3c0/0x3c0 [ 50.238043][ T3596] ? is_bpf_text_address+0x77/0x170 [ 50.243362][ T3596] ? lock_downgrade+0x6e0/0x6e0 [ 50.248219][ T3596] ? unwind_next_frame+0xee1/0x1ce0 [ 50.253605][ T3596] ? entry_SYSCALL_64_after_hwframe+0x44/0xae [ 50.259669][ T3596] ? __sanitizer_cov_trace_cmp4+0x1c/0x70 [ 50.265423][ T3596] ? is_bpf_text_address+0x99/0x170 [ 50.270819][ T3596] ? kernel_text_address+0x39/0x80 [ 50.275950][ T3596] ? __kernel_text_address+0x9/0x30 [ 50.281336][ T3596] ? unwind_get_return_address+0x51/0x90 [ 50.286975][ T3596] ? create_prof_cpu_mask+0x20/0x20 [ 50.292178][ T3596] ? arch_stack_walk+0x93/0xe0 [ 50.297172][ T3596] ? kmem_cache_alloc_trace+0x42/0x2c0 [ 50.302637][ T3596] ? rcu_read_lock_sched_held+0x3a/0x70 [ 50.308194][ T3596] rtnl_newlink+0x64/0xa0 [ 50.312524][ T3596] ? __rtnl_newlink+0x1760/0x1760 [ 50.317545][ T3596] rtnetlink_rcv_msg+0x413/0xb80 [ 50.322631][ T3596] ? rtnl_newlink+0xa0/0xa0 [ 50.327159][ T3596] netlink_rcv_skb+0x153/0x420 [ 50.331931][ T3596] ? rtnl_newlink+0xa0/0xa0 [ 50.336436][ T3596] ? netlink_ack+0xa80/0xa80 [ 50.341095][ T3596] ? netlink_deliver_tap+0x1a2/0xc40 [ 50.346532][ T3596] ? netlink_deliver_tap+0x1b1/0xc40 [ 50.351839][ T3596] netlink_unicast+0x539/0x7e0 [ 50.356633][ T3596] ? netlink_attachskb+0x880/0x880 [ 50.361750][ T3596] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 50.368003][ T3596] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 50.374707][ T3596] ? __phys_addr_symbol+0x2c/0x70 [ 50.379753][ T3596] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 50.385568][ T3596] ? __check_object_size+0x16c/0x4f0 [ 50.390859][ T3596] netlink_sendmsg+0x904/0xe00 [ 50.395715][ T3596] ? netlink_unicast+0x7e0/0x7e0 [ 50.400722][ T3596] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 50.407003][ T3596] ? netlink_unicast+0x7e0/0x7e0 [ 50.412119][ T3596] sock_sendmsg+0xcf/0x120 [ 50.416548][ T3596] __sys_sendto+0x21c/0x320 [ 50.421052][ T3596] ? __ia32_sys_getpeername+0xb0/0xb0 [ 50.426427][ T3596] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 50.432721][ T3596] ? __context_tracking_exit+0xb8/0xe0 [ 50.438188][ T3596] ? lock_downgrade+0x6e0/0x6e0 [ 50.443041][ T3596] ? lock_downgrade+0x6e0/0x6e0 [ 50.447902][ T3596] __x64_sys_sendto+0xdd/0x1b0 [ 50.452759][ T3596] ? lockdep_hardirqs_on+0x79/0x100 [ 50.457964][ T3596] ? syscall_enter_from_user_mode+0x21/0x70 [ 50.464150][ T3596] do_syscall_64+0x35/0xb0 [ 50.468565][ T3596] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 50.474452][ T3596] RIP: 0033:0x7f3148504e1c [ 50.479052][ T3596] Code: fa fa ff ff 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 20 fb ff ff 48 8b [ 50.498926][ T3596] RSP: 002b:00007ffeab5f2ab0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c [ 50.507342][ T3596] RAX: ffffffffffffffda RBX: 00007f314959d320 RCX: 00007f3148504e1c [ 50.515393][ T3596] RDX: 0000000000000048 RSI: 00007f314959d370 RDI: 0000000000000003 [ 50.523444][ T3596] RBP: 0000000000000000 R08: 00007ffeab5f2b04 R09: 000000000000000c [ 50.531492][ T3596] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 [ 50.539455][ T3596] R13: 00007f314959d370 R14: 0000000000000003 R15: 0000000000000000 Fixes: 4acc45db7115 ("net: hsr: use hlist_head instead of list_head for mac addresses") Reported-by: Eric Dumazet <eric.dumazet@gmail.com> Reported-and-tested-by: syzbot+f0eb4f3876de066b128c@syzkaller.appspotmail.com Signed-off-by: Juhee Kang <claudiajkang@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: hsr: use hlist_head instead of list_head for mac addressesJuhee Kang2022-02-067-107/+171
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, HSR manages mac addresses of known HSR nodes by using list_head. It takes a lot of time when there are a lot of registered nodes due to finding specific mac address nodes by using linear search. We can be reducing the time by using hlist. Thus, this patch moves list_head to hlist_head for mac addresses and this allows for further improvement of network performance. Condition: registered 10,000 known HSR nodes Before: # iperf3 -c 192.168.10.1 -i 1 -t 10 Connecting to host 192.168.10.1, port 5201 [ 5] local 192.168.10.2 port 59442 connected to 192.168.10.1 port 5201 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-1.49 sec 3.75 MBytes 21.1 Mbits/sec 0 158 KBytes [ 5] 1.49-2.05 sec 1.25 MBytes 18.7 Mbits/sec 0 166 KBytes [ 5] 2.05-3.06 sec 2.44 MBytes 20.3 Mbits/sec 56 16.9 KBytes [ 5] 3.06-4.08 sec 1.43 MBytes 11.7 Mbits/sec 11 38.0 KBytes [ 5] 4.08-5.00 sec 951 KBytes 8.49 Mbits/sec 0 56.3 KBytes After: # iperf3 -c 192.168.10.1 -i 1 -t 10 Connecting to host 192.168.10.1, port 5201 [ 5] local 192.168.10.2 port 36460 connected to 192.168.10.1 port 5201 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-1.00 sec 7.39 MBytes 62.0 Mbits/sec 3 130 KBytes [ 5] 1.00-2.00 sec 5.06 MBytes 42.4 Mbits/sec 16 113 KBytes [ 5] 2.00-3.00 sec 8.58 MBytes 72.0 Mbits/sec 42 94.3 KBytes [ 5] 3.00-4.00 sec 7.44 MBytes 62.4 Mbits/sec 2 131 KBytes [ 5] 4.00-5.07 sec 8.13 MBytes 63.5 Mbits/sec 38 92.9 KBytes Signed-off-by: Juhee Kang <claudiajkang@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* hsr: remove get_prp_lan_id()Jakub Kicinski2022-01-271-5/+0
| | | | | | | get_prp_lan_id() has never been used. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: Write lock dev_base_lock without disabling bottom halves.Sebastian Andrzej Siewior2021-11-291-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | The writer acquires dev_base_lock with disabled bottom halves. The reader can acquire dev_base_lock without disabling bottom halves because there is no writer in softirq context. On PREEMPT_RT the softirqs are preemptible and local_bh_disable() acts as a lock to ensure that resources, that are protected by disabling bottom halves, remain protected. This leads to a circular locking dependency if the lock acquired with disabled bottom halves (as in write_lock_bh()) and somewhere else with enabled bottom halves (as by read_lock() in netstat_show()) followed by disabling bottom halves (cxgb_get_stats() -> t4_wr_mbox_meat_timeout() -> spin_lock_bh()). This is the reverse locking order. All read_lock() invocation are from sysfs callback which are not invoked from softirq context. Therefore there is no need to disable bottom halves while acquiring a write lock. Acquire the write lock of dev_base_lock without disabling bottom halves. Reported-by: Pei Zhang <pezhang@redhat.com> Reported-by: Luis Claudio R. Goncalves <lgoncalv@redhat.com> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: hsr: Add support for redbox supervision framesAndreas Oetken2021-10-264-26/+113
| | | | | | | | added support for the redbox supervision frames as defined in the IEC-62439-3:2018. Signed-off-by: Andreas Oetken <andreas.oetken@siemens-energy.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: hsr: get ready for const netdev->dev_addrJakub Kicinski2021-10-242-4/+4
| | | | | | | | | hsr_create_self_node() may get netdev->dev_addr passed as argument, netdev->dev_addr will be const soon. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: use eth_hw_addr_set() instead of ether_addr_copy()Jakub Kicinski2021-10-022-2/+2
| | | | | | | | | | | | | Convert from ether_addr_copy() to eth_hw_addr_set(): @@ expression dev, np; @@ - ether_addr_copy(dev->dev_addr, np) + eth_hw_addr_set(dev, np) Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: hsr: don't check sequence number if tag removal is offloadedGeorge McCollister2021-06-161-1/+2
| | | | | | | | | | | Don't check the sequence number when deciding when to update time_in in the node table if tag removal is offloaded since the sequence number is part of the tag. This fixes a problem where the times in the node table wouldn't update when 0 appeared to be before or equal to seq_out when tag removal was offloaded. Signed-off-by: George McCollister <george.mccollister@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: hsr: fix mac_len checksGeorge McCollister2021-05-245-21/+34
| | | | | | | | | | | | | | | | | | Commit 2e9f60932a2c ("net: hsr: check skb can contain struct hsr_ethhdr in fill_frame_info") added the following which resulted in -EINVAL always being returned: if (skb->mac_len < sizeof(struct hsr_ethhdr)) return -EINVAL; mac_len was not being set correctly so this check completely broke HSR/PRP since it was always 14, not 20. Set mac_len correctly and modify the mac_len checks to test in the correct places since sometimes it is legitimately 14. Fixes: 2e9f60932a2c ("net: hsr: check skb can contain struct hsr_ethhdr in fill_frame_info") Signed-off-by: George McCollister <george.mccollister@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: hsr: check skb can contain struct hsr_ethhdr in fill_frame_infoPhillip Potter2021-05-031-0/+4
| | | | | | | | | | | | | Check at start of fill_frame_info that the MAC header in the supplied skb is large enough to fit a struct hsr_ethhdr, as otherwise this is not a valid HSR frame. If it is too small, return an error which will then cause the callers to clean up the skb. Fixes a KMSAN-found uninit-value bug reported by syzbot at: https://syzkaller.appspot.com/bug?id=f7e9b601f1414f814f7602a82b6619a8d80bce3f Reported-by: syzbot+e267bed19bfc5478fb33@syzkaller.appspotmail.com Signed-off-by: Phillip Potter <phil@philpotter.co.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski2021-04-102-6/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| * net: hsr: Reset MAC header for Tx pathKurt Kanzenbach2021-04-072-6/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Reset MAC header in HSR Tx path. This is needed, because direct packet transmission, e.g. by specifying PACKET_QDISC_BYPASS does not reset the MAC header. This has been observed using the following setup: |$ ip link add name hsr0 type hsr slave1 lan0 slave2 lan1 supervision 45 version 1 |$ ifconfig hsr0 up |$ ./test hsr0 The test binary is using mmap'ed sockets and is specifying the PACKET_QDISC_BYPASS socket option. This patch resolves the following warning on a non-patched kernel: |[ 112.725394] ------------[ cut here ]------------ |[ 112.731418] WARNING: CPU: 1 PID: 257 at net/hsr/hsr_forward.c:560 hsr_forward_skb+0x484/0x568 |[ 112.739962] net/hsr/hsr_forward.c:560: Malformed frame (port_src hsr0) The warning can be safely removed, because the other call sites of hsr_forward_skb() make sure that the skb is prepared correctly. Fixes: d346a3fae3ff ("packet: introduce PACKET_QDISC_BYPASS socket option") Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | /net/hsr: fix misspellings using codespell toolXiong Zhenwu2021-03-191-1/+1
|/ | | | | | | | | | | | | A typo is found out by codespell tool in 111th line of hsr_debugfs.c: $ codespell ./net/hsr/ net/hsr/hsr_debugfs.c:111: Debufs ==> Debugfs Fix typos found by codespell. Signed-off-by: Xiong Zhenwu <xiong.zhenwu@zte.com.cn> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: hsr: add support for EntryForgetTimeMarco Wenzel2021-02-253-2/+9
| | | | | | | | | | | | | | | In IEC 62439-3 EntryForgetTime is defined with a value of 400 ms. When a node does not send any frame within this time, the sequence number check for can be ignored. This solves communication issues with Cisco IE 2000 in Redbox mode. Fixes: f421436a591d ("net/hsr: Add support for the High-availability Seamless Redundancy protocol (HSRv0)") Signed-off-by: Marco Wenzel <marco.wenzel@a-eberle.de> Reviewed-by: George McCollister <george.mccollister@gmail.com> Tested-by: George McCollister <george.mccollister@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Link: https://lore.kernel.org/r/20210224094653.1440-1-marco.wenzel@a-eberle.de Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* net: hsr: add offloading supportGeorge McCollister2021-02-118-26/+48
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support for offloading of HSR/PRP (IEC 62439-3) tag insertion tag removal, duplicate generation and forwarding. For HSR, insertion involves the switch adding a 6 byte HSR header after the 14 byte Ethernet header. For PRP it adds a 6 byte trailer. Tag removal involves automatically stripping the HSR/PRP header/trailer in the switch. This is possible when the switch also performs auto deduplication using the HSR/PRP header/trailer (making it no longer required). Forwarding involves automatically forwarding between redundant ports in an HSR. This is crucial because delay is accumulated as a frame passes through each node in the ring. Duplication involves the switch automatically sending a single frame from the CPU port to both redundant ports. This is required because the inserted HSR/PRP header/trailer must contain the same sequence number on the frames sent out both redundant ports. Export is_hsr_master so DSA can tell them apart from other devices in dsa_slave_changeupper. Signed-off-by: George McCollister <george.mccollister@gmail.com> Reviewed-by: Vladimir Oltean <olteanv@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: hsr: generate supervision frame without HSR/PRP tagGeorge McCollister2021-02-112-33/+14
| | | | | | | | | | | | | | | | | | For a switch to offload insertion of HSR/PRP tags, frames must not be sent to the CPU facing switch port with a tag. Generate supervision frames (eth type ETH_P_PRP) without HSR v1 (ETH_P_HSR)/PRP tag and rely on create_tagged_frame which inserts it later. This will allow skipping the tag insertion for all outgoing frames in the future which is required for HSR v1/PRP tag insertions to be offloaded. HSR v0 supervision frames always contain tag information so insertion of the tag can't be offloaded. IEC 62439-3 Ed.2.0 (HSR v1) specifically notes that this was changed since v0 to allow offloading. Signed-off-by: George McCollister <george.mccollister@gmail.com> Reviewed-by: Vladimir Oltean <olteanv@gmail.com> Tested-by: Vladimir Oltean <olteanv@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: hsr: align sup_multicast_addr in struct hsr_priv to u16 boundaryAndreas Oetken2021-02-021-1/+4
| | | | | | | | | | sup_multicast_addr is passed to ether_addr_equal for address comparison which casts the address inputs to u16 leading to an unaligned access. Aligning the sup_multicast_addr to u16 boundary fixes the issue. Signed-off-by: Andreas Oetken <andreas.oetken@siemens.com> Link: https://lore.kernel.org/r/20210202090304.2740471-1-ennoerlangen@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
* genetlink: move to smaller ops wherever possibleJakub Kicinski2020-10-031-3/+3
| | | | | | | | Bulk of the genetlink users can use smaller ops, move them. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Reviewed-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netDavid S. Miller2020-09-231-3/+3
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | Two minor conflicts: 1) net/ipv4/route.c, adding a new local variable while moving another local variable and removing it's initial assignment. 2) drivers/net/dsa/microchip/ksz9477.c, overlapping changes. One pretty prints the port mode differently, whilst another changes the driver to try and obtain the port mode from the port node rather than the switch node. Signed-off-by: David S. Miller <davem@davemloft.net>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 08:15:09 +0100