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2020-07-10devlink: Rework devlink health reporter destructorVladyslav Tarasiuk
Devlink keeps its own reference to every reporter in a list and inits refcount to 1 upon reporter's creation. Existing destructor waits to free the memory indefinitely using msleep() until all references except devlink's own are put. Rework this mechanism by moving memory free routine to a separate function, which is called when the last reporter reference is put. Besides, it allows to call __devlink_health_reporter_destroy() while locked on a reporters list mutex in symmetry to __devlink_health_reporter_create(), which is required in follow-up patch. Signed-off-by: Vladyslav Tarasiuk <vladyslavt@mellanox.com> Reviewed-by: Moshe Shemesh <moshe@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-10devlink: Refactor devlink health reporter constructorVladyslav Tarasiuk
Prepare a common routine in devlink_health_reporter_create() for usage in similar functions for devlink port health reporters. Signed-off-by: Vladyslav Tarasiuk <vladyslavt@mellanox.com> Reviewed-by: Moshe Shemesh <moshe@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-10ethtool: add tunnel info interfaceJakub Kicinski
Add an interface to report offloaded UDP ports via ethtool netlink. Now that core takes care of tracking which UDP tunnel ports the NICs are aware of we can quite easily export this information out to user space. The responsibility of writing the netlink dumps is split between ethtool code and udp_tunnel_nic.c - since udp_tunnel module may not always be loaded, yet we should always report the capabilities of the NIC. $ ethtool --show-tunnels eth0 Tunnel information for eth0: UDP port table 0: Size: 4 Types: vxlan No entries UDP port table 1: Size: 4 Types: geneve, vxlan-gpe Entries (1): port 1230, vxlan-gpe v4: - back to v2, build fix is now directly in udp_tunnel.h v3: - don't compile ETHTOOL_MSG_TUNNEL_INFO_GET in if CONFIG_INET not set. v2: - fix string set count, - reorder enums in the uAPI, - fix type of ETHTOOL_A_TUNNEL_UDP_TABLE_TYPES to bitset in docs and comments. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-10udp_tunnel: add central NIC RX port offload infrastructureJakub Kicinski
Cater to devices which: (a) may want to sleep in the callbacks; (b) only have IPv4 support; (c) need all the programming to happen while the netdev is up. Drivers attach UDP tunnel offload info struct to their netdevs, where they declare how many UDP ports of various tunnel types they support. Core takes care of tracking which ports to offload. Use a fixed-size array since this matches what almost all drivers do, and avoids a complexity and uncertainty around memory allocations in an atomic context. Make sure that tunnel drivers don't try to replay the ports when new NIC netdev is registered. Automatic replays would mess up reference counting, and will be removed completely once all drivers are converted. v4: - use a #define NULL to avoid build issues with CONFIG_INET=n. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-10Replace HTTP links with HTTPS ones: BLUETOOTH SUBSYSTEMAlexander A. Klimov
Rationale: Reduces attack surface on kernel devs opening the links for MITM as HTTPS traffic is much harder to manipulate. Deterministic algorithm: For each file: If not .svg: For each line: If doesn't contain `\bxmlns\b`: For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`: If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`: If both the HTTP and HTTPS versions return 200 OK and serve the same content: Replace HTTP with HTTPS. Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2020-07-10Bluetooth: RFCOMM: Use fallthrough pseudo-keywordGustavo A. R. Silva
Replace the existing /* fall through */ comments and its variants with the new pseudo-keyword macro fallthrough[1]. [1] https://www.kernel.org/doc/html/latest/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2020-07-10Bluetooth: core: Use fallthrough pseudo-keywordGustavo A. R. Silva
Replace the existing /* fall through */ comments and its variants with the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary fall-through markings when it is the case. [1] https://www.kernel.org/doc/html/latest/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2020-07-10Bluetooth: Fix slab-out-of-bounds read in hci_extended_inquiry_result_evt()Peilin Ye
Check upon `num_rsp` is insufficient. A malformed event packet with a large `num_rsp` number makes hci_extended_inquiry_result_evt() go out of bounds. Fix it. This patch fixes the following syzbot bug: https://syzkaller.appspot.com/bug?id=4bf11aa05c4ca51ce0df86e500fce486552dc8d2 Reported-by: syzbot+d8489a79b781849b9c46@syzkaller.appspotmail.com Cc: stable@vger.kernel.org Signed-off-by: Peilin Ye <yepeilin.cs@gmail.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2020-07-10Merge tag 'cleanup-kernel_read_write' of git://git.infradead.org/users/hch/miscLinus Torvalds
Pull in-kernel read and write op cleanups from Christoph Hellwig: "Cleanup in-kernel read and write operations Reshuffle the (__)kernel_read and (__)kernel_write helpers, and ensure all users of in-kernel file I/O use them if they don't use iov_iter based methods already. The new WARN_ONs in combination with syzcaller already found a missing input validation in 9p. The fix should be on your way through the maintainer ASAP". [ This is prep-work for the real changes coming 5.9 ] * tag 'cleanup-kernel_read_write' of git://git.infradead.org/users/hch/misc: fs: remove __vfs_read fs: implement kernel_read using __kernel_read integrity/ima: switch to using __kernel_read fs: add a __kernel_read helper fs: remove __vfs_write fs: implement kernel_write using __kernel_write fs: check FMODE_WRITE in __kernel_write fs: unexport __kernel_write bpfilter: switch to kernel_write autofs: switch to kernel_write cachefiles: switch to kernel_write
2020-07-09devlink: Move input checks from driver to devlinkDanielle Ratson
Currently, all the input checks are done in driver. After adding the split capability to devlink port, move the checks to devlink. Signed-off-by: Danielle Ratson <danieller@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-09devlink: Add a new devlink port split ability attribute and pass to netlinkDanielle Ratson
Add a new attribute that indicates the split ability of devlink port. Drivers are expected to set it via devlink_port_attrs_set(), before registering the port. Signed-off-by: Danielle Ratson <danieller@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-09devlink: Add a new devlink port lanes attribute and pass to netlinkDanielle Ratson
Add a new devlink port attribute that indicates the port's number of lanes. Drivers are expected to set it via devlink_port_attrs_set(), before registering the port. The attribute is not passed to user space in case the number of lanes is invalid (0). Signed-off-by: Danielle Ratson <danieller@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-09devlink: Replace devlink_port_attrs_set parameters with a structDanielle Ratson
Currently, devlink_port_attrs_set accepts a long list of parameters, that most of them are devlink port's attributes. Use the devlink_port_attrs struct to replace the relevant parameters. Signed-off-by: Danielle Ratson <danieller@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-09devlink: Move switch_port attribute of devlink_port_attrs to devlink_portDanielle Ratson
The struct devlink_port_attrs holds the attributes of devlink_port. Similarly to the previous patch, 'switch_port' attribute is another exception. Move 'switch_port' to be devlink_port's field. Signed-off-by: Danielle Ratson <danieller@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-09devlink: Move set attribute of devlink_port_attrs to devlink_portDanielle Ratson
The struct devlink_port_attrs holds the attributes of devlink_port. The 'set' field is not devlink_port's attribute as opposed to most of the others. Move 'set' to be devlink_port's field called 'attrs_set'. Signed-off-by: Danielle Ratson <danieller@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-09Merge tag 'kallsyms_show_value-v5.8-rc5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull kallsyms fix from Kees Cook: "Refactor kallsyms_show_value() users for correct cred. I'm not delighted by the timing of getting these changes to you, but it does fix a handful of kernel address exposures, and no one has screamed yet at the patches. Several users of kallsyms_show_value() were performing checks not during "open". Refactor everything needed to gain proper checks against file->f_cred for modules, kprobes, and bpf" * tag 'kallsyms_show_value-v5.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: selftests: kmod: Add module address visibility test bpf: Check correct cred for CAP_SYSLOG in bpf_dump_raw_ok() kprobes: Do not expose probe addresses to non-CAP_SYSLOG module: Do not expose section addresses to non-CAP_SYSLOG module: Refactor section attr into bin attribute kallsyms: Refactor kallsyms_show_value() to take cred
2020-07-09tcp: make sure listeners don't initialize congestion-control stateChristoph Paasch
syzkaller found its way into setsockopt with TCP_CONGESTION "cdg". tcp_cdg_init() does a kcalloc to store the gradients. As sk_clone_lock just copies all the memory, the allocated pointer will be copied as well, if the app called setsockopt(..., TCP_CONGESTION) on the listener. If now the socket will be destroyed before the congestion-control has properly been initialized (through a call to tcp_init_transfer), we will end up freeing memory that does not belong to that particular socket, opening the door to a double-free: [ 11.413102] ================================================================== [ 11.414181] BUG: KASAN: double-free or invalid-free in tcp_cleanup_congestion_control+0x58/0xd0 [ 11.415329] [ 11.415560] CPU: 3 PID: 4884 Comm: syz-executor.5 Not tainted 5.8.0-rc2 #80 [ 11.416544] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014 [ 11.418148] Call Trace: [ 11.418534] <IRQ> [ 11.418834] dump_stack+0x7d/0xb0 [ 11.419297] print_address_description.constprop.0+0x1a/0x210 [ 11.422079] kasan_report_invalid_free+0x51/0x80 [ 11.423433] __kasan_slab_free+0x15e/0x170 [ 11.424761] kfree+0x8c/0x230 [ 11.425157] tcp_cleanup_congestion_control+0x58/0xd0 [ 11.425872] tcp_v4_destroy_sock+0x57/0x5a0 [ 11.426493] inet_csk_destroy_sock+0x153/0x2c0 [ 11.427093] tcp_v4_syn_recv_sock+0xb29/0x1100 [ 11.427731] tcp_get_cookie_sock+0xc3/0x4a0 [ 11.429457] cookie_v4_check+0x13d0/0x2500 [ 11.433189] tcp_v4_do_rcv+0x60e/0x780 [ 11.433727] tcp_v4_rcv+0x2869/0x2e10 [ 11.437143] ip_protocol_deliver_rcu+0x23/0x190 [ 11.437810] ip_local_deliver+0x294/0x350 [ 11.439566] __netif_receive_skb_one_core+0x15d/0x1a0 [ 11.441995] process_backlog+0x1b1/0x6b0 [ 11.443148] net_rx_action+0x37e/0xc40 [ 11.445361] __do_softirq+0x18c/0x61a [ 11.445881] asm_call_on_stack+0x12/0x20 [ 11.446409] </IRQ> [ 11.446716] do_softirq_own_stack+0x34/0x40 [ 11.447259] do_softirq.part.0+0x26/0x30 [ 11.447827] __local_bh_enable_ip+0x46/0x50 [ 11.448406] ip_finish_output2+0x60f/0x1bc0 [ 11.450109] __ip_queue_xmit+0x71c/0x1b60 [ 11.451861] __tcp_transmit_skb+0x1727/0x3bb0 [ 11.453789] tcp_rcv_state_process+0x3070/0x4d3a [ 11.456810] tcp_v4_do_rcv+0x2ad/0x780 [ 11.457995] __release_sock+0x14b/0x2c0 [ 11.458529] release_sock+0x4a/0x170 [ 11.459005] __inet_stream_connect+0x467/0xc80 [ 11.461435] inet_stream_connect+0x4e/0xa0 [ 11.462043] __sys_connect+0x204/0x270 [ 11.465515] __x64_sys_connect+0x6a/0xb0 [ 11.466088] do_syscall_64+0x3e/0x70 [ 11.466617] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 11.467341] RIP: 0033:0x7f56046dc469 [ 11.467844] Code: Bad RIP value. [ 11.468282] RSP: 002b:00007f5604dccdd8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 11.469326] RAX: ffffffffffffffda RBX: 000000000068bf00 RCX: 00007f56046dc469 [ 11.470379] RDX: 0000000000000010 RSI: 0000000020000000 RDI: 0000000000000004 [ 11.471311] RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000 [ 11.472286] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 11.473341] R13: 000000000041427c R14: 00007f5604dcd5c0 R15: 0000000000000003 [ 11.474321] [ 11.474527] Allocated by task 4884: [ 11.475031] save_stack+0x1b/0x40 [ 11.475548] __kasan_kmalloc.constprop.0+0xc2/0xd0 [ 11.476182] tcp_cdg_init+0xf0/0x150 [ 11.476744] tcp_init_congestion_control+0x9b/0x3a0 [ 11.477435] tcp_set_congestion_control+0x270/0x32f [ 11.478088] do_tcp_setsockopt.isra.0+0x521/0x1a00 [ 11.478744] __sys_setsockopt+0xff/0x1e0 [ 11.479259] __x64_sys_setsockopt+0xb5/0x150 [ 11.479895] do_syscall_64+0x3e/0x70 [ 11.480395] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 11.481097] [ 11.481321] Freed by task 4872: [ 11.481783] save_stack+0x1b/0x40 [ 11.482230] __kasan_slab_free+0x12c/0x170 [ 11.482839] kfree+0x8c/0x230 [ 11.483240] tcp_cleanup_congestion_control+0x58/0xd0 [ 11.483948] tcp_v4_destroy_sock+0x57/0x5a0 [ 11.484502] inet_csk_destroy_sock+0x153/0x2c0 [ 11.485144] tcp_close+0x932/0xfe0 [ 11.485642] inet_release+0xc1/0x1c0 [ 11.486131] __sock_release+0xc0/0x270 [ 11.486697] sock_close+0xc/0x10 [ 11.487145] __fput+0x277/0x780 [ 11.487632] task_work_run+0xeb/0x180 [ 11.488118] __prepare_exit_to_usermode+0x15a/0x160 [ 11.488834] do_syscall_64+0x4a/0x70 [ 11.489326] entry_SYSCALL_64_after_hwframe+0x44/0xa9 Wei Wang fixed a part of these CDG-malloc issues with commit c12014440750 ("tcp: memset ca_priv data to 0 properly"). This patch here fixes the listener-scenario: We make sure that listeners setting the congestion-control through setsockopt won't initialize it (thus CDG never allocates on listeners). For those who use AF_UNSPEC to reuse a socket, tcp_disconnect() is changed to cleanup afterwards. (The issue can be reproduced at least down to v4.4.x.) Cc: Wei Wang <weiwan@google.com> Cc: Eric Dumazet <edumazet@google.com> Fixes: 2b0a8c9eee81 ("tcp: add CDG congestion control") Signed-off-by: Christoph Paasch <cpaasch@apple.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-09mptcp: add MPTCP socket diag interfacePaolo Abeni
exposes basic inet socket attribute, plus some MPTCP socket fields comprising PM status and MPTCP-level sequence numbers. Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-09mptcp: add msk interations helperPaolo Abeni
mptcp_token_iter_next() allow traversing all the MPTCP sockets inside the token container belonging to the given network namespace with a quite standard iterator semantic. That will be used by the next patch, but keep the API generic, as we plan to use this later for PM's sake. Additionally export mptcp_token_get_sock(), as it also will be used by the diag module. Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-09inet_diag: support for wider protocol numbersPaolo Abeni
After commit bf9765145b85 ("sock: Make sk_protocol a 16-bit value") the current size of 'sdiag_protocol' is not sufficient to represent the possible protocol values. This change introduces a new inet diag request attribute to let user space specify the relevant protocol number using u32 values. The attribute is parsed by inet diag core on get/dump command and the extended protocol value, if available, is preferred to 'sdiag_protocol' to lookup the diag handler. The parse attributed are exposed to all the diag handlers via the cb->data. Note that inet_diag_dump_one_icsk() is left unmodified, as it will not be used by protocol using the extended attribute. Suggested-by: David S. Miller <davem@davemloft.net> Co-developed-by: Christoph Paasch <cpaasch@apple.com> Signed-off-by: Christoph Paasch <cpaasch@apple.com> Acked-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-09ethtool: fix genlmsg_put() failure handling in ethnl_default_dumpit()Michal Kubecek
If the genlmsg_put() call in ethnl_default_dumpit() fails, we bail out without checking if we already have some messages in current skb like we do with ethnl_default_dump_one() failure later. Therefore if existing messages almost fill up the buffer so that there is not enough space even for netlink and genetlink header, we lose all prepared messages and return and error. Rather than duplicating the skb->len check, move the genlmsg_put(), genlmsg_cancel() and genlmsg_end() calls into ethnl_default_dump_one(). This is also more logical as all message composition will be in ethnl_default_dump_one() and only iteration logic will be left in ethnl_default_dumpit(). Fixes: 728480f12442 ("ethtool: default handlers for GET requests") Reported-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Michal Kubecek <mkubecek@suse.cz> Reviewed-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-09net_sched: fix a memory leak in atm_tc_init()Cong Wang
When tcf_block_get() fails inside atm_tc_init(), atm_tc_put() is called to release the qdisc p->link.q. But the flow->ref prevents it to do so, as the flow->ref is still zero. Fix this by moving the p->link.ref initialization before tcf_block_get(). Fixes: 6529eaba33f0 ("net: sched: introduce tcf block infractructure") Reported-and-tested-by: syzbot+d411cff6ab29cc2c311b@syzkaller.appspotmail.com Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-09xfrm: interface: support IPIP and IPIP6 tunnels processing with .cb_handlerXin Long
Similar to ip_vti, IPIP and IPIP6 tunnels processing can easily be done with .cb_handler for xfrm interface. v1->v2: - no change. v2-v3: - enable it only when CONFIG_INET_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>
2020-07-09xfrm: interface: support IP6IP6 and IP6IP tunnels processing with .cb_handlerXin Long
Similar to ip6_vti, IP6IP6 and IP6IP tunnels processing can easily be done with .cb_handler for xfrm interface. 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>
2020-07-09ipcomp: assign if_id to child tunnel from parent tunnelXin Long
The child tunnel if_id will be used for xfrm interface's lookup when processing the IP(6)IP(6) packets in the next patches. 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 Long
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 Long
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>
2020-07-09ip_vti: support IPIP6 tunnel processingXin Long
For IPIP6 tunnel processing, the functions called will be the same as that for IPIP tunnel's. So reuse it and register it with family == AF_INET6. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2020-07-09ip_vti: support IPIP tunnel processing with .cb_handlerXin Long
With tunnel4_input_afinfo added, IPIP tunnel processing in ip_vti can be easily done with .cb_handler. So replace the processing by calling ip_tunnel_rcv() with it. v1->v2: - no change. v2-v3: - enable it only when CONFIG_INET_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>
2020-07-09tunnel6: add tunnel6_input_afinfo for ipip and ipv6 tunnelsXin Long
This patch is to register a callback function tunnel6_rcv_cb with is_ipip set in a xfrm_input_afinfo object for tunnel6 and tunnel46. It will be called by xfrm_rcv_cb() from xfrm_input() when family is AF_INET6 and proto is IPPROTO_IPIP or IPPROTO_IPV6. v1->v2: - Fix a sparse warning caused by the missing "__rcu", as Jakub noticed. - Handle the err returned by xfrm_input_register_afinfo() in tunnel6_init/fini(), as Sabrina noticed. v2->v3: - Add "#if IS_ENABLED(CONFIG_INET6_XFRM_TUNNEL)" to fix the build error when xfrm is disabled, reported by kbuild test robot Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2020-07-09tunnel4: add cb_handler to struct xfrm_tunnelXin Long
This patch is to register a callback function tunnel4_rcv_cb with is_ipip set in a xfrm_input_afinfo object for tunnel4 and tunnel64. It will be called by xfrm_rcv_cb() from xfrm_input() when family is AF_INET and proto is IPPROTO_IPIP or IPPROTO_IPV6. v1->v2: - Fix a sparse warning caused by the missing "__rcu", as Jakub noticed. - Handle the err returned by xfrm_input_register_afinfo() in tunnel4_init/fini(), as Sabrina noticed. v2->v3: - Add "#if IS_ENABLED(CONFIG_INET_XFRM_TUNNEL)" to fix the build error when xfrm is disabled, reported by kbuild test robot. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2020-07-09xfrm: add is_ipip to struct xfrm_input_afinfoXin Long
This patch is to add a new member is_ipip to struct xfrm_input_afinfo, to allow another group family of callback functions to be registered with is_ipip set. This will be used for doing a callback for struct xfrm(6)_tunnel of ipip/ipv6 tunnels in xfrm_input() by calling xfrm_rcv_cb(), which is needed by ipip/ipv6 tunnels' support in ip(6)_vti and xfrm interface in the next patches. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2020-07-08bpf: Check correct cred for CAP_SYSLOG in bpf_dump_raw_ok()Kees Cook
When evaluating access control over kallsyms visibility, credentials at open() time need to be used, not the "current" creds (though in BPF's case, this has likely always been the same). Plumb access to associated file->f_cred down through bpf_dump_raw_ok() and its callers now that kallsysm_show_value() has been refactored to take struct cred. Cc: Alexei Starovoitov <ast@kernel.org> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: bpf@vger.kernel.org Cc: stable@vger.kernel.org Fixes: 7105e828c087 ("bpf: allow for correlation of maps and helpers in dump") Signed-off-by: Kees Cook <keescook@chromium.org>
2020-07-08tipc: fix retransmission on unicast linksHamish Martin
A scenario has been observed where a 'bc_init' message for a link is not retransmitted if it fails to be received by the peer. This leads to the peer never establishing the link fully and it discarding all other data received on the link. In this scenario the message is lost in transit to the peer. The issue is traced to the 'nxt_retr' field of the skb not being initialised for links that aren't a bc_sndlink. This leads to the comparison in tipc_link_advance_transmq() that gates whether to attempt retransmission of a message performing in an undesirable way. Depending on the relative value of 'jiffies', this comparison: time_before(jiffies, TIPC_SKB_CB(skb)->nxt_retr) may return true or false given that 'nxt_retr' remains at the uninitialised value of 0 for non bc_sndlinks. This is most noticeable shortly after boot when jiffies is initialised to a high value (to flush out rollover bugs) and we compare a jiffies of, say, 4294940189 to zero. In that case time_before returns 'true' leading to the skb not being retransmitted. The fix is to ensure that all skbs have a valid 'nxt_retr' time set for them and this is achieved by refactoring the setting of this value into a central function. With this fix, transmission losses of 'bc_init' messages do not stall the link establishment forever because the 'bc_init' message is retransmitted and the link eventually establishes correctly. Fixes: 382f598fb66b ("tipc: reduce duplicate packets for unicast traffic") Acked-by: Jon Maloy <jmaloy@redhat.com> Signed-off-by: Hamish Martin <hamish.martin@alliedtelesis.co.nz> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-08net: dsa: tag_rtl4_a: Implement Realtek 4 byte A tagLinus Walleij
This implements the known parts of the Realtek 4 byte tag protocol version 0xA, as found in the RTL8366RB DSA switch. It is designated as protocol version 0xA as a different Realtek 4 byte tag format with protocol version 0x9 is known to exist in the Realtek RTL8306 chips. The tag and switch chip lacks public documentation, so the tag format has been reverse-engineered from packet dumps. As only ingress traffic has been available for analysis an egress tag has not been possible to develop (even using educated guesses about bit fields) so this is as far as it gets. It is not known if the switch even supports egress tagging. Excessive attempts to figure out the egress tag format was made. When nothing else worked, I just tried all bit combinations with 0xannp where a is protocol and p is port. I looped through all values several times trying to get a response from ping, without any positive result. Using just these ingress tags however, the switch functionality is vastly improved and the packets find their way into the destination port without any tricky VLAN configuration. On the D-Link DIR-685 the LAN ports now come up and respond to ping without any command line configuration so this is a real improvement for users. Egress packets need to be restricted to the proper target ports using VLAN, which the RTL8366RB DSA switch driver already sets up. Cc: DENG Qingfang <dqfext@gmail.com> Cc: Mauri Sandberg <sandberg@mailfence.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-08ethtool: Add support for 100Gbps per lane link modesMeir Lichtinger
Define 100G, 200G and 400G link modes using 100Gbps per lane LR, ER and FR are defined as a single link mode because they are using same technology and by design are fully interoperable. EEPROM content indicates if the module is LR, ER, or FR, and the user space ethtool decoder is planned to support decoding these modes in the EEPROM. Signed-off-by: Meir Lichtinger <meirl@mellanox.com> CC: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Aya Levin <ayal@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-08l2tp: remove skb_dst_set() from l2tp_xmit_skb()Xin Long
In the tx path of l2tp, l2tp_xmit_skb() calls skb_dst_set() to set skb's dst. However, it will eventually call inet6_csk_xmit() or ip_queue_xmit() where skb's dst will be overwritten by: skb_dst_set_noref(skb, dst); without releasing the old dst in skb. Then it causes dst/dev refcnt leak: unregister_netdevice: waiting for eth0 to become free. Usage count = 1 This can be reproduced by simply running: # modprobe l2tp_eth && modprobe l2tp_ip # sh ./tools/testing/selftests/net/l2tp.sh So before going to inet6_csk_xmit() or ip_queue_xmit(), skb's dst should be dropped. This patch is to fix it by removing skb_dst_set() from l2tp_xmit_skb() and moving skb_dst_drop() into l2tp_xmit_core(). Fixes: 3557baabf280 ("[L2TP]: PPP over L2TP driver core") Reported-by: Hangbin Liu <liuhangbin@gmail.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: James Chapman <jchapman@katalix.com> Tested-by: James Chapman <jchapman@katalix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-08audit: use the proper gfp flags in the audit_log_nfcfg() callsPaul Moore
Commit 142240398e50 ("audit: add gfp parameter to audit_log_nfcfg") incorrectly passed gfp flags to audit_log_nfcfg() which were not consistent with the calling function, this commit fixes that. Fixes: 142240398e50 ("audit: add gfp parameter to audit_log_nfcfg") Reported-by: Jones Desougi <jones.desougi+netfilter@gmail.com> Reviewed-by: Richard Guy Briggs <rgb@redhat.com> Signed-off-by: Paul Moore <paul@paul-moore.com>
2020-07-08Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-nextDavid S. Miller
Pablo Neira Ayuso says: ==================== Netfilter/IPVS updates for net-next The following patchset contains Netfilter updates for net-next: 1) Support for rejecting packets from the prerouting chain, from Laura Garcia Liebana. 2) Remove useless assignment in pipapo, from Stefano Brivio. 3) On demand hook registration in IPVS, from Julian Anastasov. 4) Expire IPVS connection from process context to not overload timers, also from Julian. 5) Fallback to conntrack TCP tracker to handle connection reuse in IPVS, from Julian Anastasov. 6) Several patches to support for chain bindings. 7) Expose enum nft_chain_flags through UAPI. 8) Reject unsupported chain flags from the netlink control plane. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-08net: phy: Uninline PHY ethtool statistics operationsFlorian Fainelli
Now that we have moved the PHY ethtool statistics to be dynamically registered, we no longer need to inline those for ethtool. This used to be done to avoid cross symbol referencing and allow ethtool to be decoupled from PHYLIB entirely. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-08net/smc: tolerate future SMCD versionsUrsula Braun
CLC proposal messages of future SMCD versions could be larger than SMCD V1 CLC proposal messages. To enable toleration in SMC V1 the receival of CLC proposal messages is adapted: * accept larger length values in CLC proposal * check trailing eye catcher for incoming CLC proposal with V1 length only * receive the whole CLC proposal even in cases it does not fit into the V1 buffer Fixes: e7b7a64a8493d ("smc: support variable CLC proposal messages") Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-08net/smc: switch smcd_dev_list spinlock to mutexUrsula Braun
The similar smc_ib_devices spinlock has been converted to a mutex. Protecting the smcd_dev_list by a mutex is possible as well. This patch converts the smcd_dev_list spinlock to a mutex. Fixes: c6ba7c9ba43d ("net/smc: add base infrastructure for SMC-D and ISM") Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-08net/smc: fix sleep bug in smc_pnet_find_roce_resource()Ursula Braun
Tests showed this BUG: [572555.252867] BUG: sleeping function called from invalid context at kernel/locking/mutex.c:935 [572555.252876] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 131031, name: smcapp [572555.252879] INFO: lockdep is turned off. [572555.252883] CPU: 1 PID: 131031 Comm: smcapp Tainted: G O 5.7.0-rc3uschi+ #356 [572555.252885] Hardware name: IBM 3906 M03 703 (LPAR) [572555.252887] Call Trace: [572555.252896] [<00000000ac364554>] show_stack+0x94/0xe8 [572555.252901] [<00000000aca1f400>] dump_stack+0xa0/0xe0 [572555.252906] [<00000000ac3c8c10>] ___might_sleep+0x260/0x280 [572555.252910] [<00000000acdc0c98>] __mutex_lock+0x48/0x940 [572555.252912] [<00000000acdc15c2>] mutex_lock_nested+0x32/0x40 [572555.252975] [<000003ff801762d0>] mlx5_lag_get_roce_netdev+0x30/0xc0 [mlx5_core] [572555.252996] [<000003ff801fb3aa>] mlx5_ib_get_netdev+0x3a/0xe0 [mlx5_ib] [572555.253007] [<000003ff80063848>] smc_pnet_find_roce_resource+0x1d8/0x310 [smc] [572555.253011] [<000003ff800602f0>] __smc_connect+0x1f0/0x3e0 [smc] [572555.253015] [<000003ff80060634>] smc_connect+0x154/0x190 [smc] [572555.253022] [<00000000acbed8d4>] __sys_connect+0x94/0xd0 [572555.253025] [<00000000acbef620>] __s390x_sys_socketcall+0x170/0x360 [572555.253028] [<00000000acdc6800>] system_call+0x298/0x2b8 [572555.253030] INFO: lockdep is turned off. Function smc_pnet_find_rdma_dev() might be called from smc_pnet_find_roce_resource(). It holds the smc_ib_devices list spinlock while calling infiniband op get_netdev(). At least for mlx5 the get_netdev operation wants mutex serialization, which conflicts with the smc_ib_devices spinlock. This patch switches the smc_ib_devices spinlock into a mutex to allow sleeping when calling get_netdev(). Fixes: a4cf0443c414 ("smc: introduce SMC as an IB-client") Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-08net/smc: fix work request handlingKarsten Graul
Wait for pending sends only when smc_switch_conns() found a link to move the connections to. Do not wait during link freeing, this can lead to permanent hang situations. And refuse to provide a new tx slot on an unusable link. Fixes: c6f02ebeea3a ("net/smc: switch connections to alternate link") Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-08net/smc: separate LLC wait queues for flow and messagesKarsten Graul
There might be races in scenarios where both SMC link groups are on the same system. Prevent that by creating separate wait queues for LLC flows and messages. Switch to non-interruptable versions of wait_event() and wake_up() for the llc flow waiter to make sure the waiters get control sequentially. Fine tune the llc_flow_lock to include the assignment of the message. Write to system log when an unexpected message was dropped. And remove an extra indirection and use the existing local variable lgr in smc_llc_enqueue(). Fixes: 555da9af827d ("net/smc: add event-based llc_flow framework") Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-08Bluetooth: Use whitelist for scan policy when suspendingMiao-chen Chou
Even with one advertisement monitor in place, the scan policy should use the whitelist while the system is going to suspend to prevent waking by random advertisement. The following test was performed. - With a paired device, register one advertisement monitor, suspend the system and verify that the host was not awaken by random advertisements. Signed-off-by: Miao-chen Chou <mcchou@chromium.org> Reviewed-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2020-07-08net: Restrict receive packets queuing to housekeeping CPUsAlex Belits
With the existing implementation of store_rps_map(), packets are queued in the receive path on the backlog queues of other CPUs irrespective of whether they are isolated or not. This could add a latency overhead to any RT workload that is running on the same CPU. Ensure that store_rps_map() only uses available housekeeping CPUs for storing the rps_map. Signed-off-by: Alex Belits <abelits@marvell.com> Signed-off-by: Nitesh Narayan Lal <nitesh@redhat.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20200625223443.2684-4-nitesh@redhat.com
2020-07-08bpfilter: switch to kernel_writeChristoph Hellwig
While pipes don't really need sb_writers projection, __kernel_write is an interface better kept private, and the additional rw_verify_area does not hurt here. Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-07-08bpf: Add BPF_CGROUP_INET_SOCK_RELEASE hookStanislav Fomichev
Sometimes it's handy to know when the socket gets freed. In particular, we'd like to try to use a smarter allocation of ports for bpf_bind and explore the possibility of limiting the number of SOCK_DGRAM sockets the process can have. Implement BPF_CGROUP_INET_SOCK_RELEASE hook that triggers on inet socket release. It triggers only for userspace sockets (not in-kernel ones) and therefore has the same semantics as the existing BPF_CGROUP_INET_SOCK_CREATE. Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20200706230128.4073544-2-sdf@google.com
2020-07-07net/sched: Use fallthrough pseudo-keywordGustavo A. R. Silva
Replace the existing /* fall through */ comments and its variants with the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary fall-through markings when it is the case. [1] https://www.kernel.org/doc/html/latest/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
generated by cgit (git 2.34.1) at 2025-09-22 14:33:27 +0000