1. 01 Oct, 2021 1 commit
  2. 30 Sep, 2021 8 commits
    • Linus Torvalds's avatar
      Merge tag 'net-5.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net · 4de593fb
      Linus Torvalds authored
      Pull networking fixes from Jakub Kicinski:
       "Networking fixes, including fixes from mac80211, netfilter and bpf.
      
        Current release - regressions:
      
         - bpf, cgroup: assign cgroup in cgroup_sk_alloc when called from
           interrupt
      
         - mdio: revert mechanical patches which broke handling of optional
           resources
      
         - dev_addr_list: prevent address duplication
      
        Previous releases - regressions:
      
         - sctp: break out if skb_header_pointer returns NULL in sctp_rcv_ootb
           (NULL deref)
      
         - Revert "mac80211: do not use low data rates for data frames with no
           ack flag", fixing broadcast transmissions
      
         - mac80211: fix use-after-free in CCMP/GCMP RX
      
         - netfilter: include zone id in tuple hash again, minimize collisions
      
         - netfilter: nf_tables: unlink table before deleting it (race -> UAF)
      
         - netfilter: log: work around missing softdep backend module
      
         - mptcp: don't return sockets in foreign netns
      
         - sched: flower: protect fl_walk() with rcu (race -> UAF)
      
         - ixgbe: fix NULL pointer dereference in ixgbe_xdp_setup
      
         - smsc95xx: fix stalled rx after link change
      
         - enetc: fix the incorrect clearing of IF_MODE bits
      
         - ipv4: fix rtnexthop len when RTA_FLOW is present
      
         - dsa: mv88e6xxx: 6161: use correct MAX MTU config method for this
           SKU
      
         - e100: fix length calculation & buffer overrun in ethtool::get_regs
      
        Previous releases - always broken:
      
         - mac80211: fix using stale frag_tail skb pointer in A-MSDU tx
      
         - mac80211: drop frames from invalid MAC address in ad-hoc mode
      
         - af_unix: fix races in sk_peer_pid and sk_peer_cred accesses (race
           -> UAF)
      
         - bpf, x86: Fix bpf mapping of atomic fetch implementation
      
         - bpf: handle return value of BPF_PROG_TYPE_STRUCT_OPS prog
      
         - netfilter: ip6_tables: zero-initialize fragment offset
      
         - mhi: fix error path in mhi_net_newlink
      
         - af_unix: return errno instead of NULL in unix_create1() when over
           the fs.file-max limit
      
        Misc:
      
         - bpf: exempt CAP_BPF from checks against bpf_jit_limit
      
         - netfilter: conntrack: make max chain length random, prevent
           guessing buckets by attackers
      
         - netfilter: nf_nat_masquerade: make async masq_inet6_event handling
           generic, defer conntrack walk to work queue (prevent hogging RTNL
           lock)"
      
      * tag 'net-5.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (77 commits)
        af_unix: fix races in sk_peer_pid and sk_peer_cred accesses
        net: stmmac: fix EEE init issue when paired with EEE capable PHYs
        net: dev_addr_list: handle first address in __hw_addr_add_ex
        net: sched: flower: protect fl_walk() with rcu
        net: introduce and use lock_sock_fast_nested()
        net: phy: bcm7xxx: Fixed indirect MMD operations
        net: hns3: disable firmware compatible features when uninstall PF
        net: hns3: fix always enable rx vlan filter problem after selftest
        net: hns3: PF enable promisc for VF when mac table is overflow
        net: hns3: fix show wrong state when add existing uc mac address
        net: hns3: fix mixed flag HCLGE_FLAG_MQPRIO_ENABLE and HCLGE_FLAG_DCB_ENABLE
        net: hns3: don't rollback when destroy mqprio fail
        net: hns3: remove tc enable checking
        net: hns3: do not allow call hns3_nic_net_open repeatedly
        ixgbe: Fix NULL pointer dereference in ixgbe_xdp_setup
        net: bridge: mcast: Associate the seqcount with its protecting lock.
        net: mdio-ipq4019: Fix the error for an optional regs resource
        net: hns3: fix hclge_dbg_dump_tm_pg() stack usage
        net: mdio: mscc-miim: Fix the mdio controller
        af_unix: Return errno instead of NULL in unix_create1().
        ...
      4de593fb
    • Linus Torvalds's avatar
      Merge tag 'gpio-fixes-for-v5.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux · 115f6134
      Linus Torvalds authored
      Pull gpio fixes from Bartosz Golaszewski:
       "A single fix for the gpio-pca953x driver and two commits updating the
        MAINTAINERS entries for Mun Yew Tham (GPIO specific) and myself
        (treewide after a change in professional situation).
      
        Summary:
      
         - don't ignore I2C errors in gpio-pca953x
      
         - update MAINTAINERS entries for Mun Yew Tham and myself"
      
      * tag 'gpio-fixes-for-v5.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
        MAINTAINERS: Update Mun Yew Tham as Altera Pio Driver maintainer
        MAINTAINERS: update my email address
        gpio: pca953x: do not ignore i2c errors
      115f6134
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma · 78c56e53
      Linus Torvalds authored
      Pull rdma fixes from Jason Gunthorpe:
       "Not much too exciting here, although two syzkaller bugs that seem to
        have 9 lives may have finally been squashed.
      
        Several core bugs and a batch of driver bug fixes:
      
         - Fix compilation problems in qib and hfi1
      
         - Do not corrupt the joined multicast group state when using
           SEND_ONLY
      
         - Several CMA bugs, a reference leak for listening and two syzkaller
           crashers
      
         - Various bug fixes for irdma
      
         - Fix a Sleeping while atomic bug in usnic
      
         - Properly sanitize kernel pointers in dmesg
      
         - Two bugs in the 64b CQE support for hns"
      
      * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
        RDMA/hns: Add the check of the CQE size of the user space
        RDMA/hns: Fix the size setting error when copying CQE in clean_cq()
        RDMA/hfi1: Fix kernel pointer leak
        RDMA/usnic: Lock VF with mutex instead of spinlock
        RDMA/hns: Work around broken constant propagation in gcc 8
        RDMA/cma: Ensure rdma_addr_cancel() happens before issuing more requests
        RDMA/cma: Do not change route.addr.src_addr.ss_family
        RDMA/irdma: Report correct WC error when there are MW bind errors
        RDMA/irdma: Report correct WC error when transport retry counter is exceeded
        RDMA/irdma: Validate number of CQ entries on create CQ
        RDMA/irdma: Skip CQP ring during a reset
        MAINTAINERS: Update Broadcom RDMA maintainers
        RDMA/cma: Fix listener leak in rdma_cma_listen_on_all() failure
        IB/cma: Do not send IGMP leaves for sendonly Multicast groups
        IB/qib: Fix clang confusion of NULL pointer comparison
      78c56e53
    • Eric Dumazet's avatar
      af_unix: fix races in sk_peer_pid and sk_peer_cred accesses · 35306eb2
      Eric Dumazet authored
      Jann Horn reported that SO_PEERCRED and SO_PEERGROUPS implementations
      are racy, as af_unix can concurrently change sk_peer_pid and sk_peer_cred.
      
      In order to fix this issue, this patch adds a new spinlock that needs
      to be used whenever these fields are read or written.
      
      Jann also pointed out that l2cap_sock_get_peer_pid_cb() is currently
      reading sk->sk_peer_pid which makes no sense, as this field
      is only possibly set by AF_UNIX sockets.
      We will have to clean this in a separate patch.
      This could be done by reverting b48596d1 "Bluetooth: L2CAP: Add get_peer_pid callback"
      or implementing what was truly expected.
      
      Fixes: 109f6e39 ("af_unix: Allow SO_PEERCRED to work across namespaces.")
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Reported-by: default avatarJann Horn <jannh@google.com>
      Cc: Eric W. Biederman <ebiederm@xmission.com>
      Cc: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
      Cc: Marcel Holtmann <marcel@holtmann.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      35306eb2
    • Wong Vee Khee's avatar
      net: stmmac: fix EEE init issue when paired with EEE capable PHYs · 656ed8b0
      Wong Vee Khee authored
      When STMMAC is paired with Energy-Efficient Ethernet(EEE) capable PHY,
      and the PHY is advertising EEE by default, we need to enable EEE on the
      xPCS side too, instead of having user to manually trigger the enabling
      config via ethtool.
      
      Fixed this by adding xpcs_config_eee() call in stmmac_eee_init().
      
      Fixes: 7617af3d ("net: pcs: Introducing support for DWC xpcs Energy Efficient Ethernet")
      Cc: Michael Sit Wei Hong <michael.wei.hong.sit@intel.com>
      Signed-off-by: default avatarWong Vee Khee <vee.khee.wong@linux.intel.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      656ed8b0
    • Jakub Kicinski's avatar
      net: dev_addr_list: handle first address in __hw_addr_add_ex · a5b8fd65
      Jakub Kicinski authored
      struct dev_addr_list is used for device addresses, unicast addresses
      and multicast addresses. The first of those needs special handling
      of the main address - netdev->dev_addr points directly the data
      of the entry and drivers write to it freely, so we can't maintain
      it in the rbtree (for now, at least, to be fixed in net-next).
      
      Current work around sprinkles special handling of the first
      address on the list throughout the code but it missed the case
      where address is being added. First address will not be visible
      during subsequent adds.
      
      Syzbot found a warning where unicast addresses are modified
      without holding the rtnl lock, tl;dr is that team generates
      the same modification multiple times, not necessarily when
      right locks are held.
      
      In the repro we have:
      
        macvlan -> team -> veth
      
      macvlan adds a unicast address to the team. Team then pushes
      that address down to its memebers (veths). Next something unrelated
      makes team sync member addrs again, and because of the bug
      the addr entries get duplicated in the veths. macvlan gets
      removed, removes its addr from team which removes only one
      of the duplicated addresses from veths. This removal is done
      under rtnl. Next syzbot uses iptables to add a multicast addr
      to team (which does not hold rtnl lock). Team syncs veth addrs,
      but because veths' unicast list still has the duplicate it will
      also get sync, even though this update is intended for mc addresses.
      Again, uc address updates need rtnl lock, boom.
      
      Reported-by: syzbot+7a2ab2cdc14d134de553@syzkaller.appspotmail.com
      Fixes: 406f42fa ("net-next: When a bond have a massive amount of VLANs with IPv6 addresses, performance of changing link state, attaching a VRF, changing an IPv6 address, etc. go down dramtically.")
      Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      a5b8fd65
    • Vlad Buslov's avatar
      net: sched: flower: protect fl_walk() with rcu · d5ef1906
      Vlad Buslov authored
      Patch that refactored fl_walk() to use idr_for_each_entry_continue_ul()
      also removed rcu protection of individual filters which causes following
      use-after-free when filter is deleted concurrently. Fix fl_walk() to obtain
      rcu read lock while iterating and taking the filter reference and temporary
      release the lock while calling arg->fn() callback that can sleep.
      
      KASAN trace:
      
      [  352.773640] ==================================================================
      [  352.775041] BUG: KASAN: use-after-free in fl_walk+0x159/0x240 [cls_flower]
      [  352.776304] Read of size 4 at addr ffff8881c8251480 by task tc/2987
      
      [  352.777862] CPU: 3 PID: 2987 Comm: tc Not tainted 5.15.0-rc2+ #2
      [  352.778980] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014
      [  352.781022] Call Trace:
      [  352.781573]  dump_stack_lvl+0x46/0x5a
      [  352.782332]  print_address_description.constprop.0+0x1f/0x140
      [  352.783400]  ? fl_walk+0x159/0x240 [cls_flower]
      [  352.784292]  ? fl_walk+0x159/0x240 [cls_flower]
      [  352.785138]  kasan_report.cold+0x83/0xdf
      [  352.785851]  ? fl_walk+0x159/0x240 [cls_flower]
      [  352.786587]  kasan_check_range+0x145/0x1a0
      [  352.787337]  fl_walk+0x159/0x240 [cls_flower]
      [  352.788163]  ? fl_put+0x10/0x10 [cls_flower]
      [  352.789007]  ? __mutex_unlock_slowpath.constprop.0+0x220/0x220
      [  352.790102]  tcf_chain_dump+0x231/0x450
      [  352.790878]  ? tcf_chain_tp_delete_empty+0x170/0x170
      [  352.791833]  ? __might_sleep+0x2e/0xc0
      [  352.792594]  ? tfilter_notify+0x170/0x170
      [  352.793400]  ? __mutex_unlock_slowpath.constprop.0+0x220/0x220
      [  352.794477]  tc_dump_tfilter+0x385/0x4b0
      [  352.795262]  ? tc_new_tfilter+0x1180/0x1180
      [  352.796103]  ? __mod_node_page_state+0x1f/0xc0
      [  352.796974]  ? __build_skb_around+0x10e/0x130
      [  352.797826]  netlink_dump+0x2c0/0x560
      [  352.798563]  ? netlink_getsockopt+0x430/0x430
      [  352.799433]  ? __mutex_unlock_slowpath.constprop.0+0x220/0x220
      [  352.800542]  __netlink_dump_start+0x356/0x440
      [  352.801397]  rtnetlink_rcv_msg+0x3ff/0x550
      [  352.802190]  ? tc_new_tfilter+0x1180/0x1180
      [  352.802872]  ? rtnl_calcit.isra.0+0x1f0/0x1f0
      [  352.803668]  ? tc_new_tfilter+0x1180/0x1180
      [  352.804344]  ? _copy_from_iter_nocache+0x800/0x800
      [  352.805202]  ? kasan_set_track+0x1c/0x30
      [  352.805900]  netlink_rcv_skb+0xc6/0x1f0
      [  352.806587]  ? rht_deferred_worker+0x6b0/0x6b0
      [  352.807455]  ? rtnl_calcit.isra.0+0x1f0/0x1f0
      [  352.808324]  ? netlink_ack+0x4d0/0x4d0
      [  352.809086]  ? netlink_deliver_tap+0x62/0x3d0
      [  352.809951]  netlink_unicast+0x353/0x480
      [  352.810744]  ? netlink_attachskb+0x430/0x430
      [  352.811586]  ? __alloc_skb+0xd7/0x200
      [  352.812349]  netlink_sendmsg+0x396/0x680
      [  352.813132]  ? netlink_unicast+0x480/0x480
      [  352.813952]  ? __import_iovec+0x192/0x210
      [  352.814759]  ? netlink_unicast+0x480/0x480
      [  352.815580]  sock_sendmsg+0x6c/0x80
      [  352.816299]  ____sys_sendmsg+0x3a5/0x3c0
      [  352.817096]  ? kernel_sendmsg+0x30/0x30
      [  352.817873]  ? __ia32_sys_recvmmsg+0x150/0x150
      [  352.818753]  ___sys_sendmsg+0xd8/0x140
      [  352.819518]  ? sendmsg_copy_msghdr+0x110/0x110
      [  352.820402]  ? ___sys_recvmsg+0xf4/0x1a0
      [  352.821110]  ? __copy_msghdr_from_user+0x260/0x260
      [  352.821934]  ? _raw_spin_lock+0x81/0xd0
      [  352.822680]  ? __handle_mm_fault+0xef3/0x1b20
      [  352.823549]  ? rb_insert_color+0x2a/0x270
      [  352.824373]  ? copy_page_range+0x16b0/0x16b0
      [  352.825209]  ? perf_event_update_userpage+0x2d0/0x2d0
      [  352.826190]  ? __fget_light+0xd9/0xf0
      [  352.826941]  __sys_sendmsg+0xb3/0x130
      [  352.827613]  ? __sys_sendmsg_sock+0x20/0x20
      [  352.828377]  ? do_user_addr_fault+0x2c5/0x8a0
      [  352.829184]  ? fpregs_assert_state_consistent+0x52/0x60
      [  352.830001]  ? exit_to_user_mode_prepare+0x32/0x160
      [  352.830845]  do_syscall_64+0x35/0x80
      [  352.831445]  entry_SYSCALL_64_after_hwframe+0x44/0xae
      [  352.832331] RIP: 0033:0x7f7bee973c17
      [  352.833078] Code: 0c 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
      [  352.836202] RSP: 002b:00007ffcbb368e28 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
      [  352.837524] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7bee973c17
      [  352.838715] RDX: 0000000000000000 RSI: 00007ffcbb368e50 RDI: 0000000000000003
      [  352.839838] RBP: 00007ffcbb36d090 R08: 00000000cea96d79 R09: 00007f7beea34a40
      [  352.841021] R10: 00000000004059bb R11: 0000000000000246 R12: 000000000046563f
      [  352.842208] R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffcbb36d088
      
      [  352.843784] Allocated by task 2960:
      [  352.844451]  kasan_save_stack+0x1b/0x40
      [  352.845173]  __kasan_kmalloc+0x7c/0x90
      [  352.845873]  fl_change+0x282/0x22db [cls_flower]
      [  352.846696]  tc_new_tfilter+0x6cf/0x1180
      [  352.847493]  rtnetlink_rcv_msg+0x471/0x550
      [  352.848323]  netlink_rcv_skb+0xc6/0x1f0
      [  352.849097]  netlink_unicast+0x353/0x480
      [  352.849886]  netlink_sendmsg+0x396/0x680
      [  352.850678]  sock_sendmsg+0x6c/0x80
      [  352.851398]  ____sys_sendmsg+0x3a5/0x3c0
      [  352.852202]  ___sys_sendmsg+0xd8/0x140
      [  352.852967]  __sys_sendmsg+0xb3/0x130
      [  352.853718]  do_syscall_64+0x35/0x80
      [  352.854457]  entry_SYSCALL_64_after_hwframe+0x44/0xae
      
      [  352.855830] Freed by task 7:
      [  352.856421]  kasan_save_stack+0x1b/0x40
      [  352.857139]  kasan_set_track+0x1c/0x30
      [  352.857854]  kasan_set_free_info+0x20/0x30
      [  352.858609]  __kasan_slab_free+0xed/0x130
      [  352.859348]  kfree+0xa7/0x3c0
      [  352.859951]  process_one_work+0x44d/0x780
      [  352.860685]  worker_thread+0x2e2/0x7e0
      [  352.861390]  kthread+0x1f4/0x220
      [  352.862022]  ret_from_fork+0x1f/0x30
      
      [  352.862955] Last potentially related work creation:
      [  352.863758]  kasan_save_stack+0x1b/0x40
      [  352.864378]  kasan_record_aux_stack+0xab/0xc0
      [  352.865028]  insert_work+0x30/0x160
      [  352.865617]  __queue_work+0x351/0x670
      [  352.866261]  rcu_work_rcufn+0x30/0x40
      [  352.866917]  rcu_core+0x3b2/0xdb0
      [  352.867561]  __do_softirq+0xf6/0x386
      
      [  352.868708] Second to last potentially related work creation:
      [  352.869779]  kasan_save_stack+0x1b/0x40
      [  352.870560]  kasan_record_aux_stack+0xab/0xc0
      [  352.871426]  call_rcu+0x5f/0x5c0
      [  352.872108]  queue_rcu_work+0x44/0x50
      [  352.872855]  __fl_put+0x17c/0x240 [cls_flower]
      [  352.873733]  fl_delete+0xc7/0x100 [cls_flower]
      [  352.874607]  tc_del_tfilter+0x510/0xb30
      [  352.886085]  rtnetlink_rcv_msg+0x471/0x550
      [  352.886875]  netlink_rcv_skb+0xc6/0x1f0
      [  352.887636]  netlink_unicast+0x353/0x480
      [  352.888285]  netlink_sendmsg+0x396/0x680
      [  352.888942]  sock_sendmsg+0x6c/0x80
      [  352.889583]  ____sys_sendmsg+0x3a5/0x3c0
      [  352.890311]  ___sys_sendmsg+0xd8/0x140
      [  352.891019]  __sys_sendmsg+0xb3/0x130
      [  352.891716]  do_syscall_64+0x35/0x80
      [  352.892395]  entry_SYSCALL_64_after_hwframe+0x44/0xae
      
      [  352.893666] The buggy address belongs to the object at ffff8881c8251000
                      which belongs to the cache kmalloc-2k of size 2048
      [  352.895696] The buggy address is located 1152 bytes inside of
                      2048-byte region [ffff8881c8251000, ffff8881c8251800)
      [  352.897640] The buggy address belongs to the page:
      [  352.898492] page:00000000213bac35 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1c8250
      [  352.900110] head:00000000213bac35 order:3 compound_mapcount:0 compound_pincount:0
      [  352.901541] flags: 0x2ffff800010200(slab|head|node=0|zone=2|lastcpupid=0x1ffff)
      [  352.902908] raw: 002ffff800010200 0000000000000000 dead000000000122 ffff888100042f00
      [  352.904391] raw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000
      [  352.905861] page dumped because: kasan: bad access detected
      
      [  352.907323] Memory state around the buggy address:
      [  352.908218]  ffff8881c8251380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
      [  352.909471]  ffff8881c8251400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
      [  352.910735] >ffff8881c8251480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
      [  352.912012]                    ^
      [  352.912642]  ffff8881c8251500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
      [  352.913919]  ffff8881c8251580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
      [  352.915185] ==================================================================
      
      Fixes: d39d7149 ("idr: introduce idr_for_each_entry_continue_ul()")
      Signed-off-by: default avatarVlad Buslov <vladbu@nvidia.com>
      Acked-by: default avatarCong Wang <cong.wang@bytedance.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      d5ef1906
    • Paolo Abeni's avatar
      net: introduce and use lock_sock_fast_nested() · 49054556
      Paolo Abeni authored
      Syzkaller reported a false positive deadlock involving
      the nl socket lock and the subflow socket lock:
      
      MPTCP: kernel_bind error, err=-98
      ============================================
      WARNING: possible recursive locking detected
      5.15.0-rc1-syzkaller #0 Not tainted
      --------------------------------------------
      syz-executor998/6520 is trying to acquire lock:
      ffff8880795718a0 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: mptcp_close+0x267/0x7b0 net/mptcp/protocol.c:2738
      
      but task is already holding lock:
      ffff8880787c8c60 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1612 [inline]
      ffff8880787c8c60 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: mptcp_close+0x23/0x7b0 net/mptcp/protocol.c:2720
      
      other info that might help us debug this:
       Possible unsafe locking scenario:
      
             CPU0
             ----
        lock(k-sk_lock-AF_INET);
        lock(k-sk_lock-AF_INET);
      
       *** DEADLOCK ***
      
       May be due to missing lock nesting notation
      
      3 locks held by syz-executor998/6520:
       #0: ffffffff8d176c50 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:802
       #1: ffffffff8d176d08 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline]
       #1: ffffffff8d176d08 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x3e0/0x580 net/netlink/genetlink.c:790
       #2: ffff8880787c8c60 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1612 [inline]
       #2: ffff8880787c8c60 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: mptcp_close+0x23/0x7b0 net/mptcp/protocol.c:2720
      
      stack backtrace:
      CPU: 1 PID: 6520 Comm: syz-executor998 Not tainted 5.15.0-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:88 [inline]
       dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
       print_deadlock_bug kernel/locking/lockdep.c:2944 [inline]
       check_deadlock kernel/locking/lockdep.c:2987 [inline]
       validate_chain kernel/locking/lockdep.c:3776 [inline]
       __lock_acquire.cold+0x149/0x3ab kernel/locking/lockdep.c:5015
       lock_acquire kernel/locking/lockdep.c:5625 [inline]
       lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5590
       lock_sock_fast+0x36/0x100 net/core/sock.c:3229
       mptcp_close+0x267/0x7b0 net/mptcp/protocol.c:2738
       inet_release+0x12e/0x280 net/ipv4/af_inet.c:431
       __sock_release net/socket.c:649 [inline]
       sock_release+0x87/0x1b0 net/socket.c:677
       mptcp_pm_nl_create_listen_socket+0x238/0x2c0 net/mptcp/pm_netlink.c:900
       mptcp_nl_cmd_add_addr+0x359/0x930 net/mptcp/pm_netlink.c:1170
       genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:731
       genl_family_rcv_msg net/netlink/genetlink.c:775 [inline]
       genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:792
       netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504
       genl_rcv+0x24/0x40 net/netlink/genetlink.c:803
       netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
       netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340
       netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929
       sock_sendmsg_nosec net/socket.c:704 [inline]
       sock_sendmsg+0xcf/0x120 net/socket.c:724
       sock_no_sendpage+0x101/0x150 net/core/sock.c:2980
       kernel_sendpage.part.0+0x1a0/0x340 net/socket.c:3504
       kernel_sendpage net/socket.c:3501 [inline]
       sock_sendpage+0xe5/0x140 net/socket.c:1003
       pipe_to_sendpage+0x2ad/0x380 fs/splice.c:364
       splice_from_pipe_feed fs/splice.c:418 [inline]
       __splice_from_pipe+0x43e/0x8a0 fs/splice.c:562
       splice_from_pipe fs/splice.c:597 [inline]
       generic_splice_sendpage+0xd4/0x140 fs/splice.c:746
       do_splice_from fs/splice.c:767 [inline]
       direct_splice_actor+0x110/0x180 fs/splice.c:936
       splice_direct_to_actor+0x34b/0x8c0 fs/splice.c:891
       do_splice_direct+0x1b3/0x280 fs/splice.c:979
       do_sendfile+0xae9/0x1240 fs/read_write.c:1249
       __do_sys_sendfile64 fs/read_write.c:1314 [inline]
       __se_sys_sendfile64 fs/read_write.c:1300 [inline]
       __x64_sys_sendfile64+0x1cc/0x210 fs/read_write.c:1300
       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+0x44/0xae
      RIP: 0033:0x7f215cb69969
      Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 14 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
      RSP: 002b:00007ffc96bb3868 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
      RAX: ffffffffffffffda RBX: 00007f215cbad072 RCX: 00007f215cb69969
      RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000005
      RBP: 0000000000000000 R08: 00007ffc96bb3a08 R09: 00007ffc96bb3a08
      R10: 0000000100000002 R11: 0000000000000246 R12: 00007ffc96bb387c
      R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
      
      the problem originates from uncorrect lock annotation in the mptcp
      code and is only visible since commit 2dcb96ba ("net: core: Correct
      the sock::sk_lock.owned lockdep annotations"), but is present since
      the port-based endpoint support initial implementation.
      
      This patch addresses the issue introducing a nested variant of
      lock_sock_fast() and using it in the relevant code path.
      
      Fixes: 1729cf18 ("mptcp: create the listening socket for new port")
      Fixes: 2dcb96ba ("net: core: Correct the sock::sk_lock.owned lockdep annotations")
      Suggested-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Reported-and-tested-by: syzbot+1dd53f7a89b299d59eaf@syzkaller.appspotmail.com
      Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
      Reviewed-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      49054556
  3. 29 Sep, 2021 18 commits
    • Mun Yew Tham's avatar
      MAINTAINERS: Update Mun Yew Tham as Altera Pio Driver maintainer · 040d985e
      Mun Yew Tham authored
      Update Altera Pio Driver maintainer's email from <joyce.ooi@intel.com> to <mun.yew.tham@intel.com>
      Signed-off-by: default avatarMun Yew Tham <mun.yew.tham@intel.com>
      Acked-by: default avatarJoyce Ooi <joyce.ooi@intel.com>
      Signed-off-by: default avatarBartosz Golaszewski <brgl@bgdev.pl>
      040d985e
    • Bartosz Golaszewski's avatar
      MAINTAINERS: update my email address · d1d59810
      Bartosz Golaszewski authored
      My professional situation changes soon. Update my email address.
      Signed-off-by: default avatarBartosz Golaszewski <brgl@bgdev.pl>
      Reviewed-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      Acked-by: default avatarAndy Shevchenko <andy.shevchenko@gmail.com>
      d1d59810
    • Andrey Gusakov's avatar
      gpio: pca953x: do not ignore i2c errors · 540cffba
      Andrey Gusakov authored
      Per gpio_chip interface, error shall be proparated to the caller.
      
      Attempt to silent diagnostics by returning zero (as written in the
      comment) is plain wrong, because the zero return can be interpreted by
      the caller as the gpio value.
      
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarAndrey Gusakov <andrey.gusakov@cogentembedded.com>
      Signed-off-by: default avatarNikita Yushchenko <nikita.yoush@cogentembedded.com>
      Signed-off-by: default avatarBartosz Golaszewski <brgl@bgdev.pl>
      540cffba
    • Linus Torvalds's avatar
      Merge tag 'sound-5.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound · 02d5e016
      Linus Torvalds authored
      Pull sound fixes from Takashi Iwai:
       "This became a slightly large collection of changes, partly because
        I've been off in the last weeks. Most of changes are small and
        scattered while a bit big change is found in HD-audio Realtek codec
        driver; it's a very device-specific fix that has been long wanted, so
        I decided to pick up although it's in the middle RC.
      
        Some highlights:
      
         - A new guard ioctl for ALSA rawmidi API to avoid the misuse of the
           new timestamp framing mode; it's for a regression fix
      
         - HD-audio: a revert of the 5.15 change that might work badly, new
           quirks for Lenovo Legion & co, a follow-up fix for CS8409
      
         - ASoC: lots of SOF-related fixes, fsl component fixes, corrections
           of mediatek drivers
      
         - USB-audio: fix for the PM resume
      
         - FireWire: oxfw and motu fixes"
      
      * tag 'sound-5.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (25 commits)
        ALSA: pcsp: Make hrtimer forwarding more robust
        ALSA: rawmidi: introduce SNDRV_RAWMIDI_IOCTL_USER_PVERSION
        ALSA: firewire-motu: fix truncated bytes in message tracepoints
        ASoC: SOF: trace: Omit error print when waking up trace sleepers
        ASoC: mediatek: mt8195: remove wrong fixup assignment on HDMITX
        ASoC: SOF: loader: Re-phrase the missing firmware error to avoid duplication
        ASoC: SOF: loader: release_firmware() on load failure to avoid batching
        ALSA: hda/cs8409: Setup Dolphin Headset Mic as Phantom Jack
        ALSA: pcxhr: "fix" PCXHR_REG_TO_PORT definition
        ASoC: SOF: imx: imx8m: Bar index is only valid for IRAM and SRAM types
        ASoC: SOF: imx: imx8: Bar index is only valid for IRAM and SRAM types
        ASoC: SOF: Fix DSP oops stack dump output contents
        ALSA: hda/realtek: Quirks to enable speaker output for Lenovo Legion 7i 15IMHG05, Yoga 7i 14ITL5/15ITL5, and 13s Gen2 laptops.
        ALSA: usb-audio: Unify mixer resume and reset_resume procedure
        Revert "ALSA: hda: Drop workaround for a hang at shutdown again"
        ALSA: oxfw: fix transmission method for Loud models based on OXFW971
        ASoC: mediatek: common: handle NULL case in suspend/resume function
        ASoC: fsl_xcvr: register platform component before registering cpu dai
        ASoC: fsl_spdif: register platform component before registering cpu dai
        ASoC: fsl_micfil: register platform component before registering cpu dai
        ...
      02d5e016
    • Linus Torvalds's avatar
      Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 · 6e439bbd
      Linus Torvalds authored
      Pull crypto fixes from Herbert Xu:
       "This contains fixes for a resource leak in ccp as well as stack
        corruption in x86/sm4"
      
      * 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
        crypto: x86/sm4 - Fix frame pointer stack corruption
        crypto: ccp - fix resource leaks in ccp_run_aes_gcm_cmd()
      6e439bbd
    • Florian Fainelli's avatar
      net: phy: bcm7xxx: Fixed indirect MMD operations · d88fd1b5
      Florian Fainelli authored
      When EEE support was added to the 28nm EPHY it was assumed that it would
      be able to support the standard clause 45 over clause 22 register access
      method. It turns out that the PHY does not support that, which is the
      very reason for using the indirect shadow mode 2 bank 3 access method.
      
      Implement {read,write}_mmd to allow the standard PHY library routines
      pertaining to EEE querying and configuration to work correctly on these
      PHYs. This forces us to implement a __phy_set_clr_bits() function that
      does not grab the MDIO bus lock since the PHY driver's {read,write}_mmd
      functions are always called with that lock held.
      
      Fixes: 83ee102a ("net: phy: bcm7xxx: add support for 28nm EPHY")
      Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      d88fd1b5
    • David S. Miller's avatar
      Merge branch 'hns3-fixes' · 251ffc07
      David S. Miller authored
      Guangbin Huang says:
      
      ====================
      net: hns3: add some fixes for -net
      
      This series adds some fixes for the HNS3 ethernet driver.
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      251ffc07
    • Guangbin Huang's avatar
      net: hns3: disable firmware compatible features when uninstall PF · 0178839c
      Guangbin Huang authored
      Currently, the firmware compatible features are enabled in PF driver
      initialization process, but they are not disabled in PF driver
      deinitialization process and firmware keeps these features in enabled
      status.
      
      In this case, if load an old PF driver (for example, in VM) which not
      support the firmware compatible features, firmware will still send mailbox
      message to PF when link status changed and PF will print
      "un-supported mailbox message, code = 201".
      
      To fix this problem, disable these firmware compatible features in PF
      driver deinitialization process.
      
      Fixes: ed8fb4b2 ("net: hns3: add link change event report")
      Signed-off-by: default avatarGuangbin Huang <huangguangbin2@huawei.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      0178839c
    • Guangbin Huang's avatar
      net: hns3: fix always enable rx vlan filter problem after selftest · 27bf4af6
      Guangbin Huang authored
      Currently, the rx vlan filter will always be disabled before selftest and
      be enabled after selftest as the rx vlan filter feature is fixed on in
      old device earlier than V3.
      
      However, this feature is not fixed in some new devices and it can be
      disabled by user. In this case, it is wrong if rx vlan filter is enabled
      after selftest. So fix it.
      
      Fixes: bcc26e8d ("net: hns3: remove unused code in hns3_self_test()")
      Signed-off-by: default avatarGuangbin Huang <huangguangbin2@huawei.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      27bf4af6
    • Guangbin Huang's avatar
      net: hns3: PF enable promisc for VF when mac table is overflow · 276e6042
      Guangbin Huang authored
      If unicast mac address table is full, and user add a new mac address, the
      unicast promisc needs to be enabled for the new unicast mac address can be
      used. So does the multicast promisc.
      
      Now this feature has been implemented for PF, and VF should be implemented
      too. When the mac table of VF is overflow, PF will enable promisc for this
      VF.
      
      Fixes: 1e6e7610 ("net: hns3: configure promisc mode for VF asynchronously")
      Signed-off-by: default avatarGuangbin Huang <huangguangbin2@huawei.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      276e6042
    • Jian Shen's avatar
      net: hns3: fix show wrong state when add existing uc mac address · 108b3c78
      Jian Shen authored
      Currently, if function adds an existing unicast mac address, eventhough
      driver will not add this address into hardware, but it will return 0 in
      function hclge_add_uc_addr_common(). It will cause the state of this
      unicast mac address is ACTIVE in driver, but it should be in TO-ADD state.
      
      To fix this problem, function hclge_add_uc_addr_common() returns -EEXIST
      if mac address is existing, and delete two error log to avoid printing
      them all the time after this modification.
      
      Fixes: 72110b56 ("net: hns3: return 0 and print warning when hit duplicate MAC")
      Signed-off-by: default avatarJian Shen <shenjian15@huawei.com>
      Signed-off-by: default avatarGuangbin Huang <huangguangbin2@huawei.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      108b3c78
    • Jian Shen's avatar
      net: hns3: fix mixed flag HCLGE_FLAG_MQPRIO_ENABLE and HCLGE_FLAG_DCB_ENABLE · 0472e95f
      Jian Shen authored
      HCLGE_FLAG_MQPRIO_ENABLE is supposed to set when enable
      multiple TCs with tc mqprio, and HCLGE_FLAG_DCB_ENABLE is
      supposed to set when enable multiple TCs with ets. But
      the driver mixed the flags when updating the tm configuration.
      
      Furtherly, PFC should be available when HCLGE_FLAG_MQPRIO_ENABLE
      too, so remove the unnecessary limitation.
      
      Fixes: 5a5c9091 ("net: hns3: add support for tc mqprio offload")
      Signed-off-by: default avatarJian Shen <shenjian15@huawei.com>
      Signed-off-by: default avatarGuangbin Huang <huangguangbin2@huawei.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      0472e95f
    • Jian Shen's avatar
      net: hns3: don't rollback when destroy mqprio fail · d82650be
      Jian Shen authored
      For destroy mqprio is irreversible in stack, so it's unnecessary
      to rollback the tc configuration when destroy mqprio failed.
      Otherwise, it may cause the configuration being inconsistent
      between driver and netstack.
      
      As the failure is usually caused by reset, and the driver will
      restore the configuration after reset, so it can keep the
      configuration being consistent between driver and hardware.
      
      Fixes: 5a5c9091 ("net: hns3: add support for tc mqprio offload")
      Signed-off-by: default avatarJian Shen <shenjian15@huawei.com>
      Signed-off-by: default avatarGuangbin Huang <huangguangbin2@huawei.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      d82650be
    • Jian Shen's avatar
      net: hns3: remove tc enable checking · a8e76fef
      Jian Shen authored
      Currently, in function hns3_nic_set_real_num_queue(), the
      driver doesn't report the queue count and offset for disabled
      tc. If user enables multiple TCs, but only maps user
      priorities to partial of them, it may cause the queue range
      of the unmapped TC being displayed abnormally.
      
      Fix it by removing the tc enable checking, ensure the queue
      count is not zero.
      
      With this change, the tc_en is useless now, so remove it.
      
      Fixes: a75a8efa ("net: hns3: Fix tc setup when netdev is first up")
      Signed-off-by: default avatarJian Shen <shenjian15@huawei.com>
      Signed-off-by: default avatarGuangbin Huang <huangguangbin2@huawei.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      a8e76fef
    • Jian Shen's avatar
      net: hns3: do not allow call hns3_nic_net_open repeatedly · 5b09e88e
      Jian Shen authored
      hns3_nic_net_open() is not allowed to called repeatly, but there
      is no checking for this. When doing device reset and setup tc
      concurrently, there is a small oppotunity to call hns3_nic_net_open
      repeatedly, and cause kernel bug by calling napi_enable twice.
      
      The calltrace information is like below:
      [ 3078.222780] ------------[ cut here ]------------
      [ 3078.230255] kernel BUG at net/core/dev.c:6991!
      [ 3078.236224] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP
      [ 3078.243431] Modules linked in: hns3 hclgevf hclge hnae3 vfio_iommu_type1 vfio_pci vfio_virqfd vfio pv680_mii(O)
      [ 3078.258880] CPU: 0 PID: 295 Comm: kworker/u8:5 Tainted: G           O      5.14.0-rc4+ #1
      [ 3078.269102] Hardware name:  , BIOS KpxxxFPGA 1P B600 V181 08/12/2021
      [ 3078.276801] Workqueue: hclge hclge_service_task [hclge]
      [ 3078.288774] pstate: 60400009 (nZCv daif +PAN -UAO -TCO BTYPE=--)
      [ 3078.296168] pc : napi_enable+0x80/0x84
      tc qdisc sho[w  3d0e7v8 .e3t0h218 79] lr : hns3_nic_net_open+0x138/0x510 [hns3]
      
      [ 3078.314771] sp : ffff8000108abb20
      [ 3078.319099] x29: ffff8000108abb20 x28: 0000000000000000 x27: ffff0820a8490300
      [ 3078.329121] x26: 0000000000000001 x25: ffff08209cfc6200 x24: 0000000000000000
      [ 3078.339044] x23: ffff0820a8490300 x22: ffff08209cd76000 x21: ffff0820abfe3880
      [ 3078.349018] x20: 0000000000000000 x19: ffff08209cd76900 x18: 0000000000000000
      [ 3078.358620] x17: 0000000000000000 x16: ffffc816e1727a50 x15: 0000ffff8f4ff930
      [ 3078.368895] x14: 0000000000000000 x13: 0000000000000000 x12: 0000259e9dbeb6b4
      [ 3078.377987] x11: 0096a8f7e764eb40 x10: 634615ad28d3eab5 x9 : ffffc816ad8885b8
      [ 3078.387091] x8 : ffff08209cfc6fb8 x7 : ffff0820ac0da058 x6 : ffff0820a8490344
      [ 3078.396356] x5 : 0000000000000140 x4 : 0000000000000003 x3 : ffff08209cd76938
      [ 3078.405365] x2 : 0000000000000000 x1 : 0000000000000010 x0 : ffff0820abfe38a0
      [ 3078.414657] Call trace:
      [ 3078.418517]  napi_enable+0x80/0x84
      [ 3078.424626]  hns3_reset_notify_up_enet+0x78/0xd0 [hns3]
      [ 3078.433469]  hns3_reset_notify+0x64/0x80 [hns3]
      [ 3078.441430]  hclge_notify_client+0x68/0xb0 [hclge]
      [ 3078.450511]  hclge_reset_rebuild+0x524/0x884 [hclge]
      [ 3078.458879]  hclge_reset_service_task+0x3c4/0x680 [hclge]
      [ 3078.467470]  hclge_service_task+0xb0/0xb54 [hclge]
      [ 3078.475675]  process_one_work+0x1dc/0x48c
      [ 3078.481888]  worker_thread+0x15c/0x464
      [ 3078.487104]  kthread+0x160/0x170
      [ 3078.492479]  ret_from_fork+0x10/0x18
      [ 3078.498785] Code: c8027c81 35ffffa2 d50323bf d65f03c0 (d4210000)
      [ 3078.506889] ---[ end trace 8ebe0340a1b0fb44 ]---
      
      Once hns3_nic_net_open() is excute success, the flag
      HNS3_NIC_STATE_DOWN will be cleared. So add checking for this
      flag, directly return when HNS3_NIC_STATE_DOWN is no set.
      
      Fixes: e8884027 ("net: hns3: call hns3_nic_net_open() while doing HNAE3_UP_CLIENT")
      Signed-off-by: default avatarJian Shen <shenjian15@huawei.com>
      Signed-off-by: default avatarGuangbin Huang <huangguangbin2@huawei.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      5b09e88e
    • Feng Zhou's avatar
      ixgbe: Fix NULL pointer dereference in ixgbe_xdp_setup · 513e605d
      Feng Zhou authored
      The ixgbe driver currently generates a NULL pointer dereference with
      some machine (online cpus < 63). This is due to the fact that the
      maximum value of num_xdp_queues is nr_cpu_ids. Code is in
      "ixgbe_set_rss_queues"".
      
      Here's how the problem repeats itself:
      Some machine (online cpus < 63), And user set num_queues to 63 through
      ethtool. Code is in the "ixgbe_set_channels",
      	adapter->ring_feature[RING_F_FDIR].limit = count;
      
      It becomes 63.
      
      When user use xdp, "ixgbe_set_rss_queues" will set queues num.
      	adapter->num_rx_queues = rss_i;
      	adapter->num_tx_queues = rss_i;
      	adapter->num_xdp_queues = ixgbe_xdp_queues(adapter);
      
      And rss_i's value is from
      	f = &adapter->ring_feature[RING_F_FDIR];
      	rss_i = f->indices = f->limit;
      
      So "num_rx_queues" > "num_xdp_queues", when run to "ixgbe_xdp_setup",
      	for (i = 0; i < adapter->num_rx_queues; i++)
      		if (adapter->xdp_ring[i]->xsk_umem)
      
      It leads to panic.
      
      Call trace:
      [exception RIP: ixgbe_xdp+368]
      RIP: ffffffffc02a76a0  RSP: ffff9fe16202f8d0  RFLAGS: 00010297
      RAX: 0000000000000000  RBX: 0000000000000020  RCX: 0000000000000000
      RDX: 0000000000000000  RSI: 000000000000001c  RDI: ffffffffa94ead90
      RBP: ffff92f8f24c0c18   R8: 0000000000000000   R9: 0000000000000000
      R10: ffff9fe16202f830  R11: 0000000000000000  R12: ffff92f8f24c0000
      R13: ffff9fe16202fc01  R14: 000000000000000a  R15: ffffffffc02a7530
      ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
       7 [ffff9fe16202f8f0] dev_xdp_install at ffffffffa89fbbcc
       8 [ffff9fe16202f920] dev_change_xdp_fd at ffffffffa8a08808
       9 [ffff9fe16202f960] do_setlink at ffffffffa8a20235
      10 [ffff9fe16202fa88] rtnl_setlink at ffffffffa8a20384
      11 [ffff9fe16202fc78] rtnetlink_rcv_msg at ffffffffa8a1a8dd
      12 [ffff9fe16202fcf0] netlink_rcv_skb at ffffffffa8a717eb
      13 [ffff9fe16202fd40] netlink_unicast at ffffffffa8a70f88
      14 [ffff9fe16202fd80] netlink_sendmsg at ffffffffa8a71319
      15 [ffff9fe16202fdf0] sock_sendmsg at ffffffffa89df290
      16 [ffff9fe16202fe08] __sys_sendto at ffffffffa89e19c8
      17 [ffff9fe16202ff30] __x64_sys_sendto at ffffffffa89e1a64
      18 [ffff9fe16202ff38] do_syscall_64 at ffffffffa84042b9
      19 [ffff9fe16202ff50] entry_SYSCALL_64_after_hwframe at ffffffffa8c0008c
      
      So I fix ixgbe_max_channels so that it will not allow a setting of queues
      to be higher than the num_online_cpus(). And when run to ixgbe_xdp_setup,
      take the smaller value of num_rx_queues and num_xdp_queues.
      
      Fixes: 4a9b32f3 ("ixgbe: fix potential RX buffer starvation for AF_XDP")
      Signed-off-by: default avatarFeng Zhou <zhoufeng.zf@bytedance.com>
      Tested-by: default avatarSandeep Penigalapati <sandeep.penigalapati@intel.com>
      Signed-off-by: default avatarTony Nguyen <anthony.l.nguyen@intel.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      513e605d
    • Thomas Gleixner's avatar
      net: bridge: mcast: Associate the seqcount with its protecting lock. · f936bb42
      Thomas Gleixner authored
      The sequence count bridge_mcast_querier::seq is protected by
      net_bridge::multicast_lock but seqcount_init() does not associate the
      seqcount with the lock. This leads to a warning on PREEMPT_RT because
      preemption is still enabled.
      
      Let seqcount_init() associate the seqcount with lock that protects the
      write section. Remove lockdep_assert_held_once() because lockdep already checks
      whether the associated lock is held.
      
      Fixes: 67b746f9 ("net: bridge: mcast: make sure querier port/address updates are consistent")
      Reported-by: default avatarMike Galbraith <efault@gmx.de>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Signed-off-by: default avatarSebastian Andrzej Siewior <bigeasy@linutronix.de>
      Tested-by: default avatarMike Galbraith <efault@gmx.de>
      Acked-by: default avatarNikolay Aleksandrov <nikolay@nvidia.com>
      Link: https://lore.kernel.org/r/20210928141049.593833-1-bigeasy@linutronix.deSigned-off-by: default avatarJakub Kicinski <kuba@kernel.org>
      f936bb42
    • Cai Huoqing's avatar
      net: mdio-ipq4019: Fix the error for an optional regs resource · 9e28cfea
      Cai Huoqing authored
      The second resource is optional which is only provided on the chipset
      IPQ5018. But the blamed commit ignores that and if the resource is
      not there it just fails.
      
      the resource is used like this,
      	if (priv->eth_ldo_rdy) {
      		val = readl(priv->eth_ldo_rdy);
      		val |= BIT(0);
      		writel(val, priv->eth_ldo_rdy);
      		fsleep(IPQ_PHY_SET_DELAY_US);
      	}
      
      This patch reverts that to still allow the second resource to be optional
      because other SoC have the some MDIO controller and doesn't need to
      second resource.
      
      Fixes: fa14d03e ("net: mdio-ipq4019: Make use of devm_platform_ioremap_resource()")
      Signed-off-by: default avatarCai Huoqing <caihuoqing@baidu.com>
      Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
      Link: https://lore.kernel.org/r/20210928134849.2092-1-caihuoqing@baidu.comSigned-off-by: default avatarJakub Kicinski <kuba@kernel.org>
      9e28cfea
  4. 28 Sep, 2021 13 commits