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2020-04-30ibmvnic: Skip fatal error reset after passive initJuliet Kim1-1/+2
During MTU change, the following events may happen. Client-driven CRQ initialization fails due to partner’s CRQ closed, causing client to enqueue a reset task for FATAL_ERROR. Then passive (server-driven) CRQ initialization succeeds, causing client to release CRQ and enqueue a reset task for failover. If the passive CRQ initialization occurs before the FATAL reset task is processed, the FATAL error reset task would try to access a CRQ message queue that was freed, causing an oops. The problem may be most likely to occur during DLPAR add vNIC with a non-default MTU, because the DLPAR process will automatically issue a change MTU request. Fix this by not processing fatal error reset if CRQ is passively initialized after client-driven CRQ initialization fails. Signed-off-by: Juliet Kim <julietk@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-30mptcp: fix uninitialized value accessPaolo Abeni1-1/+1
tcp_v{4,6}_syn_recv_sock() set 'own_req' only when returning a not NULL 'child', let's check 'own_req' only if child is available to avoid an - unharmful - UBSAN splat. v1 -> v2: - reference the correct hash Fixes: 4c8941de781c ("mptcp: avoid flipping mp_capable field in syn_recv_sock()") Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-30mptcp: initialize the data_fin field for mpc packetsPaolo Abeni1-0/+1
When parsing MPC+data packets we set the dss field, so we must also initialize the data_fin, or we can find stray value there. Fixes: 9a19371bf029 ("mptcp: fix data_fin handing in RX path") Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-30mptcp: fix 'use_ack' option access.Paolo Abeni1-1/+1
The mentioned RX option field is initialized only for DSS packet, we must access it only if 'dss' is set too, or the subflow will end-up in a bad status, leading to RFC violations. Fixes: d22f4988ffec ("mptcp: process MP_CAPABLE data option") Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-30mptcp: avoid a WARN on bad input.Paolo Abeni1-2/+2
Syzcaller has found a way to trigger the WARN_ON_ONCE condition in check_fully_established(). The root cause is a legit fallback to TCP scenario, so replace the WARN with a plain message on a more strict condition. Fixes: f296234c98a8 ("mptcp: Add handling of incoming MP_JOIN requests") Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-30mptcp: move option parsing into mptcp_incoming_options()Paolo Abeni7-122/+115
The mptcp_options_received structure carries several per packet flags (mp_capable, mp_join, etc.). Such fields must be cleared on each packet, even on dropped ones or packet not carrying any MPTCP options, but the current mptcp code clears them only on TCP option reset. On several races/corner cases we end-up with stray bits in incoming options, leading to WARN_ON splats. e.g.: [ 171.164906] Bad mapping: ssn=32714 map_seq=1 map_data_len=32713 [ 171.165006] WARNING: CPU: 1 PID: 5026 at net/mptcp/subflow.c:533 warn_bad_map (linux-mptcp/net/mptcp/subflow.c:533 linux-mptcp/net/mptcp/subflow.c:531) [ 171.167632] Modules linked in: ip6_vti ip_vti ip_gre ipip sit tunnel4 ip_tunnel geneve ip6_udp_tunnel udp_tunnel macsec macvtap tap ipvlan macvlan 8021q garp mrp xfrm_interface veth netdevsim nlmon dummy team bonding vcan bridge stp llc ip6_gre gre ip6_tunnel tunnel6 tun binfmt_misc intel_rapl_msr intel_rapl_common rfkill kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel joydev virtio_balloon pcspkr i2c_piix4 sunrpc ip_tables xfs libcrc32c crc32c_intel serio_raw virtio_console ata_generic virtio_blk virtio_net net_failover failover ata_piix libata [ 171.199464] CPU: 1 PID: 5026 Comm: repro Not tainted 5.7.0-rc1.mptcp_f227fdf5d388+ #95 [ 171.200886] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-2.fc30 04/01/2014 [ 171.202546] RIP: 0010:warn_bad_map (linux-mptcp/net/mptcp/subflow.c:533 linux-mptcp/net/mptcp/subflow.c:531) [ 171.206537] Code: c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 1d 8b 55 3c 44 89 e6 48 c7 c7 20 51 13 95 e8 37 8b 22 fe <0f> 0b 48 83 c4 08 5b 5d 41 5c c3 89 4c 24 04 e8 db d6 94 fe 8b 4c [ 171.220473] RSP: 0018:ffffc90000150560 EFLAGS: 00010282 [ 171.221639] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 171.223108] RDX: 0000000000000000 RSI: 0000000000000008 RDI: fffff5200002a09e [ 171.224388] RBP: ffff8880aa6e3c00 R08: 0000000000000001 R09: fffffbfff2ec9955 [ 171.225706] R10: ffffffff9764caa7 R11: fffffbfff2ec9954 R12: 0000000000007fca [ 171.227211] R13: ffff8881066f4a7f R14: ffff8880aa6e3c00 R15: 0000000000000020 [ 171.228460] FS: 00007f8623719740(0000) GS:ffff88810be00000(0000) knlGS:0000000000000000 [ 171.230065] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 171.231303] CR2: 00007ffdab190a50 CR3: 00000001038ea006 CR4: 0000000000160ee0 [ 171.232586] Call Trace: [ 171.233109] <IRQ> [ 171.233531] get_mapping_status (linux-mptcp/net/mptcp/subflow.c:691) [ 171.234371] mptcp_subflow_data_available (linux-mptcp/net/mptcp/subflow.c:736 linux-mptcp/net/mptcp/subflow.c:832) [ 171.238181] subflow_state_change (linux-mptcp/net/mptcp/subflow.c:1085 (discriminator 1)) [ 171.239066] tcp_fin (linux-mptcp/net/ipv4/tcp_input.c:4217) [ 171.240123] tcp_data_queue (linux-mptcp/./include/linux/compiler.h:199 linux-mptcp/net/ipv4/tcp_input.c:4822) [ 171.245083] tcp_rcv_established (linux-mptcp/./include/linux/skbuff.h:1785 linux-mptcp/./include/net/tcp.h:1774 linux-mptcp/./include/net/tcp.h:1847 linux-mptcp/net/ipv4/tcp_input.c:5238 linux-mptcp/net/ipv4/tcp_input.c:5730) [ 171.254089] tcp_v4_rcv (linux-mptcp/./include/linux/spinlock.h:393 linux-mptcp/net/ipv4/tcp_ipv4.c:2009) [ 171.258969] ip_protocol_deliver_rcu (linux-mptcp/net/ipv4/ip_input.c:204 (discriminator 1)) [ 171.260214] ip_local_deliver_finish (linux-mptcp/./include/linux/rcupdate.h:651 linux-mptcp/net/ipv4/ip_input.c:232) [ 171.261389] ip_local_deliver (linux-mptcp/./include/linux/netfilter.h:307 linux-mptcp/./include/linux/netfilter.h:301 linux-mptcp/net/ipv4/ip_input.c:252) [ 171.265884] ip_rcv (linux-mptcp/./include/linux/netfilter.h:307 linux-mptcp/./include/linux/netfilter.h:301 linux-mptcp/net/ipv4/ip_input.c:539) [ 171.273666] process_backlog (linux-mptcp/./include/linux/rcupdate.h:651 linux-mptcp/net/core/dev.c:6135) [ 171.275328] net_rx_action (linux-mptcp/net/core/dev.c:6572 linux-mptcp/net/core/dev.c:6640) [ 171.280472] __do_softirq (linux-mptcp/./arch/x86/include/asm/jump_label.h:25 linux-mptcp/./include/linux/jump_label.h:200 linux-mptcp/./include/trace/events/irq.h:142 linux-mptcp/kernel/softirq.c:293) [ 171.281379] do_softirq_own_stack (linux-mptcp/arch/x86/entry/entry_64.S:1083) [ 171.282358] </IRQ> We could address the issue clearing explicitly the relevant fields in several places - tcp_parse_option, tcp_fast_parse_options, possibly others. Instead we move the MPTCP option parsing into the already existing mptcp ingress hook, so that we need to clear the fields in a single place. This allows us dropping an MPTCP hook from the TCP code and removing the quite large mptcp_options_received from the tcp_sock struct. On the flip side, the MPTCP sockets will traverse the option space twice (in tcp_parse_option() and in mptcp_incoming_options(). That looks acceptable: we already do that for syn and 3rd ack packets, plain TCP socket will benefit from it, and even MPTCP sockets will experience better code locality, reducing the jumps between TCP and MPTCP code. v1 -> v2: - rebased on current '-net' tree Fixes: 648ef4b88673 ("mptcp: Implement MPTCP receive path") Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-30mptcp: consolidate synack processing.Paolo Abeni4-29/+24
Currently the MPTCP code uses 2 hooks to process syn-ack packets, mptcp_rcv_synsent() and the sk_rx_dst_set() callback. We can drop the first, moving the relevant code into the latter, reducing the hooking into the TCP code. This is also needed by the next patch. v1 -> v2: - use local tcp sock ptr instead of casting the sk variable several times - DaveM Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-30net/mlx5e: Fix q counters on uplink representorsRoi Dayan1-7/+2
Need to allocate the q counters before init_rx which needs them when creating the rq. Fixes: 8520fa57a4e9 ("net/mlx5e: Create q counters on uplink representors") Signed-off-by: Roi Dayan <roid@mellanox.com> Reviewed-by: Vlad Buslov <vladbu@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2020-04-30net/mlx5: Fix command entry leak in Internal Error StateMoshe Shemesh1-0/+4
Processing commands by cmd_work_handler() while already in Internal Error State will result in entry leak, since the handler process force completion without doorbell. Forced completion doesn't release the entry and event completion will never arrive, so entry should be released. Fixes: 73dd3a4839c1 ("net/mlx5: Avoid using pending command interface slots") Signed-off-by: Moshe Shemesh <moshe@mellanox.com> Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2020-04-30net/mlx5: Fix forced completion access non initialized command entryMoshe Shemesh1-1/+1
mlx5_cmd_flush() will trigger forced completions to all valid command entries. Triggered by an asynch event such as fast teardown it can happen at any stage of the command, including command initialization. It will trigger forced completion and that can lead to completion on an uninitialized command entry. Setting MLX5_CMD_ENT_STATE_PENDING_COMP only after command entry is initialized will ensure force completion is treated only if command entry is initialized. Fixes: 73dd3a4839c1 ("net/mlx5: Avoid using pending command interface slots") Signed-off-by: Moshe Shemesh <moshe@mellanox.com> Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2020-04-30net/mlx5: DR, On creation set CQ's arm_db member to right valueErez Shitrit1-1/+13
In polling mode, set arm_db member to a value that will avoid CQ event recovery by the HW. Otherwise we might get event without completion function. In addition,empty completion function to was added to protect from unexpected events. Fixes: 297cccebdc5a ("net/mlx5: DR, Expose an internal API to issue RDMA operations") Signed-off-by: Erez Shitrit <erezsh@mellanox.com> Reviewed-by: Tariq Toukan <tariqt@mellanox.com> Reviewed-by: Alex Vesker <valex@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2020-04-30net/mlx5: E-switch, Fix mutex init orderParav Pandit1-6/+6
In cited patch mutex is initialized after its used. Below call trace is observed. Fix the order to initialize the mutex early enough. Similarly follow mirror sequence during cleanup. kernel: DEBUG_LOCKS_WARN_ON(lock->magic != lock) kernel: WARNING: CPU: 5 PID: 45916 at kernel/locking/mutex.c:938 __mutex_lock+0x7d6/0x8a0 kernel: Call Trace: kernel: ? esw_vport_tbl_get+0x3b/0x250 [mlx5_core] kernel: ? mark_held_locks+0x55/0x70 kernel: ? __slab_free+0x274/0x400 kernel: ? lockdep_hardirqs_on+0x140/0x1d0 kernel: esw_vport_tbl_get+0x3b/0x250 [mlx5_core] kernel: ? mlx5_esw_chains_create_fdb_prio+0xa57/0xc20 [mlx5_core] kernel: mlx5_esw_vport_tbl_get+0x88/0xf0 [mlx5_core] kernel: mlx5_esw_chains_create+0x2f3/0x3e0 [mlx5_core] kernel: esw_create_offloads_fdb_tables+0x11d/0x580 [mlx5_core] kernel: esw_offloads_enable+0x26d/0x540 [mlx5_core] kernel: mlx5_eswitch_enable_locked+0x155/0x860 [mlx5_core] kernel: mlx5_devlink_eswitch_mode_set+0x1af/0x320 [mlx5_core] kernel: devlink_nl_cmd_eswitch_set_doit+0x41/0xb0 Fixes: 96e326878fa5 ("net/mlx5e: Eswitch, Use per vport tables for mirroring") Signed-off-by: Parav Pandit <parav@mellanox.com> Reviewed-by: Roi Dayan <roid@mellanox.com> Reviewed-by: Eli Cohen <eli@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2020-04-30net/mlx5: E-switch, Fix printing wrong error valueParav Pandit1-1/+1
When mlx5_modify_header_alloc() fails, instead of printing the error value returned, current error log prints 0. Fix by printing correct error value returned by mlx5_modify_header_alloc(). Fixes: 6724e66b90ee ("net/mlx5: E-Switch, Get reg_c1 value on miss") Signed-off-by: Parav Pandit <parav@mellanox.com> Reviewed-by: Roi Dayan <roid@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2020-04-30net/mlx5: E-switch, Fix error unwinding flow for steering init failureParav Pandit1-2/+2
Error unwinding is done incorrectly in the cited commit. When steering init fails, there is no need to perform steering cleanup. When vport error exists, error cleanup should be mirror of the setup routine, i.e. to perform steering cleanup before metadata cleanup. This avoids the call trace in accessing uninitialized objects which are skipped during steering_init() due to failure in steering_init(). Call trace: mlx5_cmd_modify_header_alloc:805:(pid 21128): too many modify header actions 1, max supported 0 E-Switch: Failed to create restore mod header BUG: kernel NULL pointer dereference, address: 00000000000000d0 [ 677.263079] mlx5_destroy_flow_group+0x13/0x80 [mlx5_core] [ 677.268921] esw_offloads_steering_cleanup+0x51/0xf0 [mlx5_core] [ 677.275281] esw_offloads_enable+0x1a5/0x800 [mlx5_core] [ 677.280949] mlx5_eswitch_enable_locked+0x155/0x860 [mlx5_core] [ 677.287227] mlx5_devlink_eswitch_mode_set+0x1af/0x320 [ 677.293741] devlink_nl_cmd_eswitch_set_doit+0x41/0xb0 [ 677.299217] genl_rcv_msg+0x1eb/0x430 Fixes: 7983a675ba65 ("net/mlx5: E-Switch, Enable chains only if regs loopback is enabled") Signed-off-by: Parav Pandit <parav@mellanox.com> Reviewed-by: Roi Dayan <roid@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2020-04-29wireguard: receive: use tunnel helpers for decapsulating ECN markingsToke Høiland-Jørgensen1-4/+2
WireGuard currently only propagates ECN markings on tunnel decap according to the old RFC3168 specification. However, the spec has since been updated in RFC6040 to recommend slightly different decapsulation semantics. This was implemented in the kernel as a set of common helpers for ECN decapsulation, so let's just switch over WireGuard to using those, so it can benefit from this enhancement and any future tweaks. We do not drop packets with invalid ECN marking combinations, because WireGuard is frequently used to work around broken ISPs, which could be doing that. Fixes: e7096c131e51 ("net: WireGuard secure network tunnel") Reported-by: Olivier Tilmans <olivier.tilmans@nokia-bell-labs.com> Cc: Dave Taht <dave.taht@gmail.com> Cc: Rodney W. Grimes <ietf@gndrsh.dnsmgr.net> Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-29wireguard: queueing: cleanup ptr_ring in error path of packet_queue_initJason A. Donenfeld1-1/+3
Prior, if the alloc_percpu of packet_percpu_multicore_worker_alloc failed, the previously allocated ptr_ring wouldn't be freed. This commit adds the missing call to ptr_ring_cleanup in the error case. Reported-by: Sultan Alsawaf <sultan@kerneltoast.com> Fixes: e7096c131e51 ("net: WireGuard secure network tunnel") Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-29wireguard: send: remove errant newline from packet_encrypt_workerSultan Alsawaf1-1/+0
This commit removes a useless newline at the end of a scope, which doesn't add anything in the way of organization or readability. Signed-off-by: Sultan Alsawaf <sultan@kerneltoast.com> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-29mptcp: replace mptcp_disconnect with a stubFlorian Westphal1-5/+6
Paolo points out that mptcp_disconnect is bogus: "lock_sock(sk); looks suspicious (lock should be already held by the caller) And call to: tcp_disconnect(sk, flags); too, sk is not a tcp socket". ->disconnect() gets called from e.g. inet_stream_connect when one tries to disassociate a connected socket again (to re-connect without closing the socket first). MPTCP however uses mptcp_stream_connect, not inet_stream_connect, for the mptcp-socket connect call. inet_stream_connect only gets called indirectly, for the tcp socket, so any ->disconnect() calls end up calling tcp_disconnect for that tcp subflow sk. This also explains why syzkaller has not yet reported a problem here. So for now replace this with a stub that doesn't do anything. Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/14 Acked-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-29net: dsa: mv88e6xxx: remove duplicate assignment of struct membersJason Yan1-4/+0
These struct members named 'phylink_validate' was assigned twice: static const struct mv88e6xxx_ops mv88e6190_ops = { ...... .phylink_validate = mv88e6390_phylink_validate, ...... .phylink_validate = mv88e6390_phylink_validate, }; static const struct mv88e6xxx_ops mv88e6190x_ops = { ...... .phylink_validate = mv88e6390_phylink_validate, ...... .phylink_validate = mv88e6390x_phylink_validate, }; static const struct mv88e6xxx_ops mv88e6191_ops = { ...... .phylink_validate = mv88e6390_phylink_validate, ...... .phylink_validate = mv88e6390_phylink_validate, }; static const struct mv88e6xxx_ops mv88e6290_ops = { ...... .phylink_validate = mv88e6390_phylink_validate, ...... .phylink_validate = mv88e6390_phylink_validate, }; Remove all the first one and leave the second one which are been used in fact. Be aware that for 'mv88e6190x_ops' the assignment functions is different while the others are all the same. This fixes the following coccicheck warning: drivers/net/dsa/mv88e6xxx/chip.c:3911:48-49: phylink_validate: first occurrence line 3965, second occurrence line 3967 drivers/net/dsa/mv88e6xxx/chip.c:3970:49-50: phylink_validate: first occurrence line 4024, second occurrence line 4026 drivers/net/dsa/mv88e6xxx/chip.c:4029:48-49: phylink_validate: first occurrence line 4082, second occurrence line 4085 drivers/net/dsa/mv88e6xxx/chip.c:4184:48-49: phylink_validate: first occurrence line 4238, second occurrence line 4242 Fixes: 4262c38dc42e ("net: dsa: mv88e6xxx: Add SERDES stats counters to all 6390 family members") Signed-off-by: Jason Yan <yanaijie@huawei.com> Reviewed-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-28net/x25: Fix null-ptr-deref in x25_disconnectYueHaibing1-4/+6
We should check null before do x25_neigh_put in x25_disconnect, otherwise may cause null-ptr-deref like this: #include <sys/socket.h> #include <linux/x25.h> int main() { int sck_x25; sck_x25 = socket(AF_X25, SOCK_SEQPACKET, 0); close(sck_x25); return 0; } BUG: kernel NULL pointer dereference, address: 00000000000000d8 CPU: 0 PID: 4817 Comm: t2 Not tainted 5.7.0-rc3+ #159 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.9.3- RIP: 0010:x25_disconnect+0x91/0xe0 Call Trace: x25_release+0x18a/0x1b0 __sock_release+0x3d/0xc0 sock_close+0x13/0x20 __fput+0x107/0x270 ____fput+0x9/0x10 task_work_run+0x6d/0xb0 exit_to_usermode_loop+0x102/0x110 do_syscall_64+0x23c/0x260 entry_SYSCALL_64_after_hwframe+0x49/0xb3 Reported-by: syzbot+6db548b615e5aeefdce2@syzkaller.appspotmail.com Fixes: 4becb7ee5b3d ("net/x25: Fix x25_neigh refcnt leak when x25 disconnect") Signed-off-by: YueHaibing <yuehaibing@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-28net/ena: Fix build warning in ena_xdp_set()Gavin Shan1-1/+1
This fixes the following build warning in ena_xdp_set(), which is observed on aarch64 with 64KB page size. In file included from ./include/net/inet_sock.h:19, from ./include/net/ip.h:27, from drivers/net/ethernet/amazon/ena/ena_netdev.c:46: drivers/net/ethernet/amazon/ena/ena_netdev.c: In function \ ‘ena_xdp_set’: \ drivers/net/ethernet/amazon/ena/ena_netdev.c:557:6: warning: \ format ‘%lu’ \ expects argument of type ‘long unsigned int’, but argument 4 \ has type ‘int’ \ [-Wformat=] "Failed to set xdp program, the current MTU (%d) is \ larger than the maximum allowed MTU (%lu) while xdp is on", Signed-off-by: Gavin Shan <gshan@redhat.com> Acked-by: Shay Agroskin <shayagr@amazon.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-27net/sonic: Fix a resource leak in an error handling path in 'jazz_sonic_probe()'Christophe JAILLET1-2/+4
A call to 'dma_alloc_coherent()' is hidden in 'sonic_alloc_descriptors()', called from 'sonic_probe1()'. This is correctly freed in the remove function, but not in the error handling path of the probe function. Fix it and add the missing 'dma_free_coherent()' call. While at it, rename a label in order to be slightly more informative. Fixes: efcce839360f ("[PATCH] macsonic/jazzsonic network drivers update") Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-27net: tc35815: Fix phydev supported/advertising maskAnthony Felice1-1/+1
Commit 3c1bcc8614db ("net: ethernet: Convert phydev advertize and supported from u32 to link mode") updated ethernet drivers to use a linkmode bitmap. It mistakenly dropped a bitwise negation in the tc35815 ethernet driver on a bitmask to set the supported/advertising flags. Found by Anthony via code inspection, not tested as I do not have the required hardware. Fixes: 3c1bcc8614db ("net: ethernet: Convert phydev advertize and supported from u32 to link mode") Signed-off-by: Anthony Felice <tony.felice@timesys.com> Reviewed-by: Akshay Bhat <akshay.bhat@timesys.com> Reviewed-by: Heiner Kallweit <hkallweit1@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-27sch_sfq: validate silly quantum valuesEric Dumazet1-0/+9
syzbot managed to set up sfq so that q->scaled_quantum was zero, triggering an infinite loop in sfq_dequeue() More generally, we must only accept quantum between 1 and 2^18 - 7, meaning scaled_quantum must be in [1, 0x7FFF] range. Otherwise, we also could have a loop in sfq_dequeue() if scaled_quantum happens to be 0x8000, since slot->allot could indefinitely switch between 0 and 0x8000. Fixes: eeaeb068f139 ("sch_sfq: allow big packets and be fair") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: syzbot+0251e883fe39e7a0cb0a@syzkaller.appspotmail.com Cc: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-27bnxt_en: Fix VLAN acceleration handling in bnxt_fix_features().Michael Chan1-3/+6
The current logic in bnxt_fix_features() will inadvertently turn on both CTAG and STAG VLAN offload if the user tries to disable both. Fix it by checking that the user is trying to enable CTAG or STAG before enabling both. The logic is supposed to enable or disable both CTAG and STAG together. Fixes: 5a9f6b238e59 ("bnxt_en: Enable and disable RX CTAG and RX STAG VLAN acceleration together.") Signed-off-by: Michael Chan <michael.chan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-27bnxt_en: Return error when allocating zero size context memory.Michael Chan1-1/+1
bnxt_alloc_ctx_pg_tbls() should return error when the memory size of the context memory to set up is zero. By returning success (0), the caller may proceed normally and may crash later when it tries to set up the memory. Fixes: 08fe9d181606 ("bnxt_en: Add Level 2 context memory paging support.") Signed-off-by: Michael Chan <michael.chan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-27bnxt_en: Improve AER slot reset.Michael Chan1-3/+6
Improve the slot reset sequence by disabling the device to prevent bad DMAs if slot reset fails. Return the proper result instead of always PCI_ERS_RESULT_RECOVERED to the caller. Fixes: 6316ea6db93d ("bnxt_en: Enable AER support.") Signed-off-by: Michael Chan <michael.chan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-27bnxt_en: Reduce BNXT_MSIX_VEC_MAX value to supported CQs per PF.Vasundhara Volam1-1/+1
Broadcom adapters support only maximum of 512 CQs per PF. If user sets MSIx vectors more than supported CQs, firmware is setting incorrect value for msix_vec_per_pf_max parameter. Fix it by reducing the BNXT_MSIX_VEC_MAX value to 512, even though the maximum # of MSIx vectors supported by adapter are 1280. Fixes: f399e8497826 ("bnxt_en: Use msix_vec_per_pf_max and msix_vec_per_pf_min devlink params.") Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com> Signed-off-by: Michael Chan <michael.chan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-27bnxt_en: Fix VF anti-spoof filter setup.Michael Chan2-9/+2
Fix the logic that sets the enable/disable flag for the source MAC filter according to firmware spec 1.7.1. In the original firmware spec. before 1.7.1, the VF spoof check flags were not latched after making the HWRM_FUNC_CFG call, so there was a need to keep the func_flags so that subsequent calls would perserve the VF spoof check setting. A change was made in the 1.7.1 spec so that the flags became latched. So we now set or clear the anti- spoof setting directly without retrieving the old settings in the stored vf->func_flags which are no longer valid. We also remove the unneeded vf->func_flags. Fixes: 8eb992e876a8 ("bnxt_en: Update firmware interface spec to 1.7.6.2.") Signed-off-by: Michael Chan <michael.chan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-27net: phy: marvell10g: fix temperature sensor on 2110Baruch Siach1-1/+26
Read the temperature sensor register from the correct location for the 88E2110 PHY. There is no enable/disable bit on 2110, so make mv3310_hwmon_config() run on 88X3310 only. Fixes: 62d01535474b61 ("net: phy: marvell10g: add support for the 88x2110 PHY") Cc: Maxime Chevallier <maxime.chevallier@bootlin.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Baruch Siach <baruch@tkos.co.il> Reviewed-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-27sch_choke: avoid potential panic in choke_reset()Eric Dumazet1-1/+2
If choke_init() could not allocate q->tab, we would crash later in choke_reset(). BUG: KASAN: null-ptr-deref in memset include/linux/string.h:366 [inline] BUG: KASAN: null-ptr-deref in choke_reset+0x208/0x340 net/sched/sch_choke.c:326 Write of size 8 at addr 0000000000000000 by task syz-executor822/7022 CPU: 1 PID: 7022 Comm: syz-executor822 Not tainted 5.7.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x188/0x20d lib/dump_stack.c:118 __kasan_report.cold+0x5/0x4d mm/kasan/report.c:515 kasan_report+0x33/0x50 mm/kasan/common.c:625 check_memory_region_inline mm/kasan/generic.c:187 [inline] check_memory_region+0x141/0x190 mm/kasan/generic.c:193 memset+0x20/0x40 mm/kasan/common.c:85 memset include/linux/string.h:366 [inline] choke_reset+0x208/0x340 net/sched/sch_choke.c:326 qdisc_reset+0x6b/0x520 net/sched/sch_generic.c:910 dev_deactivate_queue.constprop.0+0x13c/0x240 net/sched/sch_generic.c:1138 netdev_for_each_tx_queue include/linux/netdevice.h:2197 [inline] dev_deactivate_many+0xe2/0xba0 net/sched/sch_generic.c:1195 dev_deactivate+0xf8/0x1c0 net/sched/sch_generic.c:1233 qdisc_graft+0xd25/0x1120 net/sched/sch_api.c:1051 tc_modify_qdisc+0xbab/0x1a00 net/sched/sch_api.c:1670 rtnetlink_rcv_msg+0x44e/0xad0 net/core/rtnetlink.c:5454 netlink_rcv_skb+0x15a/0x410 net/netlink/af_netlink.c:2469 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x537/0x740 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x882/0xe10 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:672 ____sys_sendmsg+0x6bf/0x7e0 net/socket.c:2362 ___sys_sendmsg+0x100/0x170 net/socket.c:2416 __sys_sendmsg+0xec/0x1b0 net/socket.c:2449 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 Fixes: 77e62da6e60c ("sch_choke: drop all packets in queue during reset") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: syzbot <syzkaller@googlegroups.com> Cc: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-27fq_codel: fix TCA_FQ_CODEL_DROP_BATCH_SIZE sanity checksEric Dumazet1-1/+1
My intent was to not let users set a zero drop_batch_size, it seems I once again messed with min()/max(). Fixes: 9d18562a2278 ("fq_codel: add batch ability to fq_codel_drop()") Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-27net/tls: Fix sk_psock refcnt leak when in tls_data_ready()Xiyu Yang1-2/+3
tls_data_ready() invokes sk_psock_get(), which returns a reference of the specified sk_psock object to "psock" with increased refcnt. When tls_data_ready() returns, local variable "psock" becomes invalid, so the refcount should be decreased to keep refcount balanced. The reference counting issue happens in one exception handling path of tls_data_ready(). When "psock->ingress_msg" is empty but "psock" is not NULL, the function forgets to decrease the refcnt increased by sk_psock_get(), causing a refcnt leak. Fix this issue by calling sk_psock_put() on all paths when "psock" is not NULL. Signed-off-by: Xiyu Yang <xiyuyang19@fudan.edu.cn> Signed-off-by: Xin Tan <tanxin.ctf@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-27net/x25: Fix x25_neigh refcnt leak when x25 disconnectXiyu Yang1-0/+4
x25_connect() invokes x25_get_neigh(), which returns a reference of the specified x25_neigh object to "x25->neighbour" with increased refcnt. When x25 connect success and returns, the reference still be hold by "x25->neighbour", so the refcount should be decreased in x25_disconnect() to keep refcount balanced. The reference counting issue happens in x25_disconnect(), which forgets to decrease the refcnt increased by x25_get_neigh() in x25_connect(), causing a refcnt leak. Fix this issue by calling x25_neigh_put() before x25_disconnect() returns. Signed-off-by: Xiyu Yang <xiyuyang19@fudan.edu.cn> Signed-off-by: Xin Tan <tanxin.ctf@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-27net/tls: Fix sk_psock refcnt leak in bpf_exec_tx_verdict()Xiyu Yang1-0/+2
bpf_exec_tx_verdict() invokes sk_psock_get(), which returns a reference of the specified sk_psock object to "psock" with increased refcnt. When bpf_exec_tx_verdict() returns, local variable "psock" becomes invalid, so the refcount should be decreased to keep refcount balanced. The reference counting issue happens in one exception handling path of bpf_exec_tx_verdict(). When "policy" equals to NULL but "psock" is not NULL, the function forgets to decrease the refcnt increased by sk_psock_get(), causing a refcnt leak. Fix this issue by calling sk_psock_put() on this error path before bpf_exec_tx_verdict() returns. Signed-off-by: Xiyu Yang <xiyuyang19@fudan.edu.cn> Signed-off-by: Xin Tan <tanxin.ctf@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-27aquantia: Fix the media type of AQC100 ethernet controller in the driverRichard Clark1-1/+1
The Aquantia AQC100 controller enables a SFP+ port, so the driver should configure the media type as '_TYPE_FIBRE' instead of '_TYPE_TP'. Signed-off-by: Richard Clark <richard.xnu.clark@gmail.com> Cc: Igor Russkikh <irusskikh@marvell.com> Cc: "David S. Miller" <davem@davemloft.net> Acked-by: Igor Russkikh <irusskikh@marvell.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-27vsock/virtio: fix multiple packet delivery to monitoring devicesStefano Garzarella3-0/+11
In virtio_transport.c, if the virtqueue is full, the transmitting packet is queued up and it will be sent in the next iteration. This causes the same packet to be delivered multiple times to monitoring devices. We want to continue to deliver packets to monitoring devices before it is put in the virtqueue, to avoid that replies can appear in the packet capture before the transmitted packet. This patch fixes the issue, adding a new flag (tap_delivered) in struct virtio_vsock_pkt, to check if the packet is already delivered to monitoring devices. In vhost/vsock.c, we are splitting packets, so we must set 'tap_delivered' to false when we queue up the same virtio_vsock_pkt to handle the remaining bytes. Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-27vhost/vsock: fix packet delivery order to monitoring devicesStefano Garzarella1-5/+5
We want to deliver packets to monitoring devices before it is put in the virtqueue, to avoid that replies can appear in the packet capture before the transmitted packet. Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-25net: remove obsolete commentEric Dumazet1-1/+0
Commit b656722906ef ("net: Increase the size of skb_frag_t") removed the 16bit limitation of a frag on some 32bit arches. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-25mptcp: fix race in msk status updatePaolo Abeni1-1/+1
Currently subflow_finish_connect() changes unconditionally any msk socket status other than TCP_ESTABLISHED. If an unblocking connect() races with close(), we can end-up triggering: IPv4: Attempt to release TCP socket in state 1 00000000e32b8b7e when the msk socket is disposed. Be sure to enter the established status only from SYN_SENT. Fixes: c3c123d16c0e ("net: mptcp: don't hang in mptcp_sendmsg() after TCP fallback") Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-24selftests/bpf: Fix a couple of broken test_btf casesStanislav Fomichev4-40/+16
Commit 51c39bb1d5d1 ("bpf: Introduce function-by-function verification") introduced function linkage flag and changed the error message from "vlen != 0" to "Invalid func linkage" and broke some fake BPF programs. Adjust the test accordingly. AFACT, the programs don't really need any arguments and only look at BTF for maps, so let's drop the args altogether. Before: BTF raw test[103] (func (Non zero vlen)): do_test_raw:3703:FAIL expected err_str:vlen != 0 magic: 0xeb9f version: 1 flags: 0x0 hdr_len: 24 type_off: 0 type_len: 72 str_off: 72 str_len: 10 btf_total_size: 106 [1] INT (anon) size=4 bits_offset=0 nr_bits=32 encoding=SIGNED [2] INT (anon) size=4 bits_offset=0 nr_bits=32 encoding=(none) [3] FUNC_PROTO (anon) return=0 args=(1 a, 2 b) [4] FUNC func type_id=3 Invalid func linkage BTF libbpf test[1] (test_btf_haskv.o): libbpf: load bpf program failed: Invalid argument libbpf: -- BEGIN DUMP LOG --- libbpf: Validating test_long_fname_2() func#1... Arg#0 type PTR in test_long_fname_2() is not supported yet. processed 0 insns (limit 1000000) max_states_per_insn 0 total_states 0 peak_states 0 mark_read 0 libbpf: -- END LOG -- libbpf: failed to load program 'dummy_tracepoint' libbpf: failed to load object 'test_btf_haskv.o' do_test_file:4201:FAIL bpf_object__load: -4007 BTF libbpf test[2] (test_btf_newkv.o): libbpf: load bpf program failed: Invalid argument libbpf: -- BEGIN DUMP LOG --- libbpf: Validating test_long_fname_2() func#1... Arg#0 type PTR in test_long_fname_2() is not supported yet. processed 0 insns (limit 1000000) max_states_per_insn 0 total_states 0 peak_states 0 mark_read 0 libbpf: -- END LOG -- libbpf: failed to load program 'dummy_tracepoint' libbpf: failed to load object 'test_btf_newkv.o' do_test_file:4201:FAIL bpf_object__load: -4007 BTF libbpf test[3] (test_btf_nokv.o): libbpf: load bpf program failed: Invalid argument libbpf: -- BEGIN DUMP LOG --- libbpf: Validating test_long_fname_2() func#1... Arg#0 type PTR in test_long_fname_2() is not supported yet. processed 0 insns (limit 1000000) max_states_per_insn 0 total_states 0 peak_states 0 mark_read 0 libbpf: -- END LOG -- libbpf: failed to load program 'dummy_tracepoint' libbpf: failed to load object 'test_btf_nokv.o' do_test_file:4201:FAIL bpf_object__load: -4007 Fixes: 51c39bb1d5d1 ("bpf: Introduce function-by-function verification") Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200422003753.124921-1-sdf@google.com
2020-04-24tools/runqslower: Ensure own vmlinux.h is picked up firstAndrii Nakryiko1-1/+1
Reorder include paths to ensure that runqslower sources are picking up vmlinux.h, generated by runqslower's own Makefile. When runqslower is built from selftests/bpf, due to current -I$(BPF_INCLUDE) -I$(OUTPUT) ordering, it might pick up not-yet-complete vmlinux.h, generated by selftests Makefile, which could lead to compilation errors like [0]. So ensure that -I$(OUTPUT) goes first and rely on runqslower's Makefile own dependency chain to ensure vmlinux.h is properly completed before source code relying on it is compiled. [0] https://travis-ci.org/github/libbpf/libbpf/jobs/677905925 Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200422012407.176303-1-andriin@fb.com
2020-04-24bpf: Make bpf_link_fops staticZou Wei1-1/+1
Fix the following sparse warning: kernel/bpf/syscall.c:2289:30: warning: symbol 'bpf_link_fops' was not declared. Should it be static? Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Zou Wei <zou_wei@huawei.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/1587609160-117806-1-git-send-email-zou_wei@huawei.com
2020-04-24bpftool: Respect the -d option in struct_ops cmdMartin KaFai Lau1-1/+7
In the prog cmd, the "-d" option turns on the verifier log. This is missed in the "struct_ops" cmd and this patch fixes it. Fixes: 65c93628599d ("bpftool: Add struct_ops support") Signed-off-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Reviewed-by: Quentin Monnet <quentin@isovalent.com> Link: https://lore.kernel.org/bpf/20200424182911.1259355-1-kafai@fb.com
2020-04-24selftests/bpf: Add test for freplace program with expected_attach_typeToke Høiland-Jørgensen3-18/+58
This adds a new selftest that tests the ability to attach an freplace program to a program type that relies on the expected_attach_type of the target program to pass verification. Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/158773526831.293902.16011743438619684815.stgit@toke.dk
2020-04-24bpf: Propagate expected_attach_type when verifying freplace programsToke Høiland-Jørgensen1-0/+8
For some program types, the verifier relies on the expected_attach_type of the program being verified in the verification process. However, for freplace programs, the attach type was not propagated along with the verifier ops, so the expected_attach_type would always be zero for freplace programs. This in turn caused the verifier to sometimes make the wrong call for freplace programs. For all existing uses of expected_attach_type for this purpose, the result of this was only false negatives (i.e., freplace functions would be rejected by the verifier even though they were valid programs for the target they were replacing). However, should a false positive be introduced, this can lead to out-of-bounds accesses and/or crashes. The fix introduced in this patch is to propagate the expected_attach_type to the freplace program during verification, and reset it after that is done. Fixes: be8704ff07d2 ("bpf: Introduce dynamic program extensions") Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/158773526726.293902.13257293296560360508.stgit@toke.dk
2020-04-24bpf: Fix leak in LINK_UPDATE and enforce empty old_prog_fdAndrii Nakryiko1-2/+9
Fix bug of not putting bpf_link in LINK_UPDATE command. Also enforce zeroed old_prog_fd if no BPF_F_REPLACE flag is specified. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200424052045.4002963-1-andriin@fb.com
2020-04-24bpf, x86_32: Fix logic error in BPF_LDX zero-extensionWang YanQing1-1/+1
When verifier_zext is true, we don't need to emit code for zero-extension. Fixes: 836256bf5f37 ("x32: bpf: eliminate zero extension code-gen") Signed-off-by: Wang YanQing <udknight@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200423050637.GA4029@udknight
2020-04-24bpf, x86_32: Fix clobbering of dst for BPF_JSETLuke Nelson1-4/+18
The current JIT clobbers the destination register for BPF_JSET BPF_X and BPF_K by using "and" and "or" instructions. This is fine when the destination register is a temporary loaded from a register stored on the stack but not otherwise. This patch fixes the problem (for both BPF_K and BPF_X) by always loading the destination register into temporaries since BPF_JSET should not modify the destination register. This bug may not be currently triggerable as BPF_REG_AX is the only register not stored on the stack and the verifier uses it in a limited way. Fixes: 03f5781be2c7b ("bpf, x86_32: add eBPF JIT compiler for ia32") Signed-off-by: Xi Wang <xi.wang@gmail.com> Signed-off-by: Luke Nelson <luke.r.nels@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Wang YanQing <udknight@gmail.com> Link: https://lore.kernel.org/bpf/20200422173630.8351-2-luke.r.nels@gmail.com
2020-04-24bpf, x86_32: Fix incorrect encoding in BPF_LDX zero-extensionLuke Nelson1-1/+3
The current JIT uses the following sequence to zero-extend into the upper 32 bits of the destination register for BPF_LDX BPF_{B,H,W}, when the destination register is not on the stack: EMIT3(0xC7, add_1reg(0xC0, dst_hi), 0); The problem is that C7 /0 encodes a MOV instruction that requires a 4-byte immediate; the current code emits only 1 byte of the immediate. This means that the first 3 bytes of the next instruction will be treated as the rest of the immediate, breaking the stream of instructions. This patch fixes the problem by instead emitting "xor dst_hi,dst_hi" to clear the upper 32 bits. This fixes the problem and is more efficient than using MOV to load a zero immediate. This bug may not be currently triggerable as BPF_REG_AX is the only register not stored on the stack and the verifier uses it in a limited way, and the verifier implements a zero-extension optimization. But the JIT should avoid emitting incorrect encodings regardless. Fixes: 03f5781be2c7b ("bpf, x86_32: add eBPF JIT compiler for ia32") Signed-off-by: Xi Wang <xi.wang@gmail.com> Signed-off-by: Luke Nelson <luke.r.nels@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Reviewed-by: H. Peter Anvin (Intel) <hpa@zytor.com> Acked-by: Wang YanQing <udknight@gmail.com> Link: https://lore.kernel.org/bpf/20200422173630.8351-1-luke.r.nels@gmail.com