IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready 8021q: adding VLAN 0 to HW filter on device bond0 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.3/29067 is trying to acquire lock: 00000000077e7f95 (&macvlan_netdev_addr_lock_key#2/2){+...}, at: netif_addr_lock_nested include/linux/netdevice.h:4007 [inline] 00000000077e7f95 (&macvlan_netdev_addr_lock_key#2/2){+...}, at: dev_uc_sync_multiple+0x11a/0x1e0 net/core/dev_addr_lists.c:574 but task is already holding lock: 0000000000e41ef1 (&dev_addr_list_lock_key#2/1){+...}, at: netif_addr_lock_nested include/linux/netdevice.h:4007 [inline] 0000000000e41ef1 (&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_uc_sync+0x11a/0x1e0 net/core/dev_addr_lists.c:544 macvlan_set_mac_lists+0x55/0x110 drivers/net/macvlan.c:806 __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 rtnl_configure_link+0xec/0x230 net/core/rtnetlink.c:2830 rtnl_newlink+0x1057/0x15c0 net/core/rtnetlink.c:3161 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 (&macvlan_netdev_addr_lock_key#2/2){+...}: _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(&macvlan_netdev_addr_lock_key#2/2); lock(&dev_addr_list_lock_key#2/1); lock(&macvlan_netdev_addr_lock_key#2/2); *** DEADLOCK *** 4 locks held by syz-executor.3/29067: #0: 00000000decc920f (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline] #0: 00000000decc920f (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x3fe/0xb80 net/core/rtnetlink.c:4779 #1: 00000000b803b2a3 (&vlan_netdev_addr_lock_key#2/2){+...}, at: spin_lock_bh include/linux/spinlock.h:334 [inline] #1: 00000000b803b2a3 (&vlan_netdev_addr_lock_key#2/2){+...}, at: netif_addr_lock_bh include/linux/netdevice.h:4012 [inline] #1: 00000000b803b2a3 (&vlan_netdev_addr_lock_key#2/2){+...}, at: dev_set_rx_mode net/core/dev.c:7606 [inline] #1: 00000000b803b2a3 (&vlan_netdev_addr_lock_key#2/2){+...}, at: __dev_open+0x264/0x3a0 net/core/dev.c:1410 #2: 0000000000e41ef1 (&dev_addr_list_lock_key#2/1){+...}, at: netif_addr_lock_nested include/linux/netdevice.h:4007 [inline] #2: 0000000000e41ef1 (&dev_addr_list_lock_key#2/1){+...}, at: dev_mc_sync+0x11a/0x1e0 net/core/dev_addr_lists.c:765 #3: 000000005aececb0 (rcu_read_lock){....}, at: team_set_rx_mode+0x0/0x230 drivers/net/team/team.c:509 stack backtrace: CPU: 1 PID: 29067 Comm: syz-executor.3 Not tainted 4.19.211-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+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: 0033:0x7f0e3053d049 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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:00007f0e2eeb2168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f0e3064ff60 RCX: 00007f0e3053d049 RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003 RBP: 00007f0e3059708d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd89f0f7af R14: 00007f0e2eeb2300 R15: 0000000000022000 IPv6: ADDRCONF(NETDEV_UP): team0.4094: 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. IPv6: ADDRCONF(NETDEV_CHANGE): team0.4094: link becomes ready TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect usb usb9: usbfs: interface 0 claimed by hub while 'syz-executor.2' sets config #0 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. usb usb9: usbfs: interface 0 claimed by usbfs while 'syz-executor.2' sets config #1 IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready 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 IPv6: ADDRCONF(NETDEV_UP): team0.4094: 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 hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected 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. IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready team0: Device ipip0 is of different type IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready usb usb9: usbfs: interface 0 claimed by hub while 'syz-executor.2' sets config #0 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. usb usb9: usbfs: interface 0 claimed by usbfs while 'syz-executor.2' sets config #1 IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes 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. IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready team0: Device ipip0 is of different type IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes 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. team0: Device ipip0 is of different type IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes 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 IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready overlayfs: './file0' not a directory team0: Device ipip0 is of different type overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. team0: Device ipip0 is of different type IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. team0: Device ipip0 is of different type overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. team0: Device ipip0 is of different type netlink: 'syz-executor.2': attribute type 1 has an invalid length. IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 overlayfs: overlapping lowerdir path overlayfs: overlapping lowerdir path overlayfs: overlapping lowerdir path mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium overlayfs: overlapping lowerdir path kauditd_printk_skb: 1 callbacks suppressed audit: type=1800 audit(1648005091.277:191): pid=29626 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.4" name="bus" dev="sda1" ino=14419 res=0 audit: type=1804 audit(1648005091.277:192): pid=29626 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir610704873/syzkaller.oBXI1T/659/bus" dev="sda1" ino=14419 res=1 mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium audit: type=1800 audit(1648005091.997:193): pid=29655 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.4" name="bus" dev="sda1" ino=14340 res=0 audit: type=1804 audit(1648005092.057:194): pid=29655 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir610704873/syzkaller.oBXI1T/660/bus" dev="sda1" ino=14340 res=1 audit: type=1800 audit(1648005092.187:195): pid=29660 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.0" name="bus" dev="sda1" ino=13937 res=0