IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
8021q: adding VLAN 0 to HW filter on device bond0
IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready
8021q: adding VLAN 0 to HW filter on device team0
======================================================
WARNING: possible circular locking dependency detected
4.19.211-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.3/14116 is trying to acquire lock:
00000000a0662601 (&vlan_netdev_addr_lock_key/1){+...}, at: netif_addr_lock_nested include/linux/netdevice.h:4007 [inline]
00000000a0662601 (&vlan_netdev_addr_lock_key/1){+...}, at: dev_uc_sync_multiple+0x11a/0x1e0 net/core/dev_addr_lists.c:574

but task is already holding lock:
00000000c11461de (&dev_addr_list_lock_key#2/1){+...}, at: netif_addr_lock_nested include/linux/netdevice.h:4007 [inline]
00000000c11461de (&dev_addr_list_lock_key#2/1){+...}, at: dev_mc_sync+0x11a/0x1e0 net/core/dev_addr_lists.c:765

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (&dev_addr_list_lock_key#2/1){+...}:
       netif_addr_lock_nested include/linux/netdevice.h:4007 [inline]
       dev_mc_sync+0x11a/0x1e0 net/core/dev_addr_lists.c:765
       vlan_dev_set_rx_mode+0x38/0x80 net/8021q/vlan_dev.c:488
       __dev_set_rx_mode+0x1d9/0x2f0 net/core/dev.c:7601
       dev_set_rx_mode net/core/dev.c:7607 [inline]
       __dev_open+0x26c/0x3a0 net/core/dev.c:1410
       dev_open net/core/dev.c:1437 [inline]
       dev_open+0xde/0x140 net/core/dev.c:1430
       team_port_add drivers/net/team/team.c:1220 [inline]
       team_add_slave+0xb02/0x1fa0 drivers/net/team/team.c:1976
       do_set_master+0x1c8/0x220 net/core/rtnetlink.c:2321
       rtnl_newlink+0x1279/0x15c0 net/core/rtnetlink.c:3170
       rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4782
       netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2463
       netlink_unicast_kernel net/netlink/af_netlink.c:1325 [inline]
       netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1351
       netlink_sendmsg+0x6c3/0xc50 net/netlink/af_netlink.c:1917
       sock_sendmsg_nosec net/socket.c:651 [inline]
       sock_sendmsg+0xc3/0x120 net/socket.c:661
       ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2227
       __sys_sendmsg net/socket.c:2265 [inline]
       __do_sys_sendmsg net/socket.c:2274 [inline]
       __se_sys_sendmsg net/socket.c:2272 [inline]
       __x64_sys_sendmsg+0x132/0x220 net/socket.c:2272
       do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
       entry_SYSCALL_64_after_hwframe+0x49/0xbe

-> #0 (&vlan_netdev_addr_lock_key/1){+...}:
       _raw_spin_lock_nested+0x30/0x40 kernel/locking/spinlock.c:354
       netif_addr_lock_nested include/linux/netdevice.h:4007 [inline]
       dev_uc_sync_multiple+0x11a/0x1e0 net/core/dev_addr_lists.c:574
       team_set_rx_mode+0xce/0x230 drivers/net/team/team.c:1788
       __dev_set_rx_mode+0x1d9/0x2f0 net/core/dev.c:7601
       dev_mc_sync+0x193/0x1e0 net/core/dev_addr_lists.c:768
       vlan_dev_set_rx_mode+0x38/0x80 net/8021q/vlan_dev.c:488
       __dev_set_rx_mode+0x1d9/0x2f0 net/core/dev.c:7601
       dev_set_rx_mode net/core/dev.c:7607 [inline]
       __dev_open+0x26c/0x3a0 net/core/dev.c:1410
       __dev_change_flags+0x501/0x660 net/core/dev.c:7679
       dev_change_flags+0x7e/0x140 net/core/dev.c:7748
       vlan_device_event+0x1429/0x1e40 net/8021q/vlan.c:463
       notifier_call_chain+0xc0/0x230 kernel/notifier.c:93
       call_netdevice_notifiers net/core/dev.c:1762 [inline]
       __dev_notify_flags+0x110/0x2b0 net/core/dev.c:7717
       dev_change_flags+0xf0/0x140 net/core/dev.c:7753
       do_setlink+0x14f1/0x3540 net/core/rtnetlink.c:2449
       rtnl_group_changelink net/core/rtnetlink.c:2925 [inline]
       rtnl_newlink+0xbc9/0x15c0 net/core/rtnetlink.c:3083
       rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4782
       netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2463
       netlink_unicast_kernel net/netlink/af_netlink.c:1325 [inline]
       netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1351
       netlink_sendmsg+0x6c3/0xc50 net/netlink/af_netlink.c:1917
       sock_sendmsg_nosec net/socket.c:651 [inline]
       sock_sendmsg+0xc3/0x120 net/socket.c:661
       ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2227
       __sys_sendmsg net/socket.c:2265 [inline]
       __do_sys_sendmsg net/socket.c:2274 [inline]
       __se_sys_sendmsg net/socket.c:2272 [inline]
       __x64_sys_sendmsg+0x132/0x220 net/socket.c:2272
       do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
       entry_SYSCALL_64_after_hwframe+0x49/0xbe

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&dev_addr_list_lock_key#2/1);
                               lock(&vlan_netdev_addr_lock_key/1);
                               lock(&dev_addr_list_lock_key#2/1);
  lock(&vlan_netdev_addr_lock_key/1);

 *** DEADLOCK ***

4 locks held by syz-executor.3/14116:
 #0: 00000000e96ab12f (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline]
 #0: 00000000e96ab12f (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x3fe/0xb80 net/core/rtnetlink.c:4779
 #1: 00000000852fb1d4 (&vlan_netdev_addr_lock_key#2/2){+...}, at: spin_lock_bh include/linux/spinlock.h:334 [inline]
 #1: 00000000852fb1d4 (&vlan_netdev_addr_lock_key#2/2){+...}, at: netif_addr_lock_bh include/linux/netdevice.h:4012 [inline]
 #1: 00000000852fb1d4 (&vlan_netdev_addr_lock_key#2/2){+...}, at: dev_set_rx_mode net/core/dev.c:7606 [inline]
 #1: 00000000852fb1d4 (&vlan_netdev_addr_lock_key#2/2){+...}, at: __dev_open+0x264/0x3a0 net/core/dev.c:1410
 #2: 00000000c11461de (&dev_addr_list_lock_key#2/1){+...}, at: netif_addr_lock_nested include/linux/netdevice.h:4007 [inline]
 #2: 00000000c11461de (&dev_addr_list_lock_key#2/1){+...}, at: dev_mc_sync+0x11a/0x1e0 net/core/dev_addr_lists.c:765
 #3: 000000006fd0de13 (rcu_read_lock){....}, at: team_set_rx_mode+0x0/0x230 drivers/net/team/team.c:509

stack backtrace:
CPU: 0 PID: 14116 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1222
 check_prev_add kernel/locking/lockdep.c:1866 [inline]
 check_prevs_add kernel/locking/lockdep.c:1979 [inline]
 validate_chain kernel/locking/lockdep.c:2420 [inline]
 __lock_acquire+0x30c9/0x3ff0 kernel/locking/lockdep.c:3416
 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908
 _raw_spin_lock_nested+0x30/0x40 kernel/locking/spinlock.c:354
 netif_addr_lock_nested include/linux/netdevice.h:4007 [inline]
 dev_uc_sync_multiple+0x11a/0x1e0 net/core/dev_addr_lists.c:574
 team_set_rx_mode+0xce/0x230 drivers/net/team/team.c:1788
 __dev_set_rx_mode+0x1d9/0x2f0 net/core/dev.c:7601
 dev_mc_sync+0x193/0x1e0 net/core/dev_addr_lists.c:768
 vlan_dev_set_rx_mode+0x38/0x80 net/8021q/vlan_dev.c:488
 __dev_set_rx_mode+0x1d9/0x2f0 net/core/dev.c:7601
 dev_set_rx_mode net/core/dev.c:7607 [inline]
 __dev_open+0x26c/0x3a0 net/core/dev.c:1410
 __dev_change_flags+0x501/0x660 net/core/dev.c:7679
 dev_change_flags+0x7e/0x140 net/core/dev.c:7748
 vlan_device_event+0x1429/0x1e40 net/8021q/vlan.c:463
 notifier_call_chain+0xc0/0x230 kernel/notifier.c:93
 call_netdevice_notifiers net/core/dev.c:1762 [inline]
 __dev_notify_flags+0x110/0x2b0 net/core/dev.c:7717
 dev_change_flags+0xf0/0x140 net/core/dev.c:7753
 do_setlink+0x14f1/0x3540 net/core/rtnetlink.c:2449
 rtnl_group_changelink net/core/rtnetlink.c:2925 [inline]
 rtnl_newlink+0xbc9/0x15c0 net/core/rtnetlink.c:3083
 rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4782
 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2463
 netlink_unicast_kernel net/netlink/af_netlink.c:1325 [inline]
 netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1351
 netlink_sendmsg+0x6c3/0xc50 net/netlink/af_netlink.c:1917
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0xc3/0x120 net/socket.c:661
 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2227
 __sys_sendmsg net/socket.c:2265 [inline]
 __do_sys_sendmsg net/socket.c:2274 [inline]
 __se_sys_sendmsg net/socket.c:2272 [inline]
 __x64_sys_sendmsg+0x132/0x220 net/socket.c:2272
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fda982610c9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fda967d3168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fda98380f80 RCX: 00007fda982610c9
RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000005
RBP: 00007fda982bcae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc763592ef R14: 00007fda967d3300 R15: 0000000000022000
IPv6: ADDRCONF(NETDEV_UP): team0.0: link is not ready
chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19
caif:caif_disconnect_client(): nothing to disconnect
chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT
chnl_net:chnl_net_open(): state disconnected
A link change request failed with some changes committed already. Interface caif0 may have been left with an inconsistent configuration, please check.
netlink: 40 bytes leftover after parsing attributes in process `syz-executor.3'.