IPv6: ADDRCONF(NETDEV_UP): macvtap1: link is not ready 8021q: adding VLAN 0 to HW filter on device macvtap1 ============================================ WARNING: possible recursive locking detected 4.14.195-syzkaller #0 Not tainted -------------------------------------------- syz-executor.0/7679 is trying to acquire lock: (&team->lock){+.+.}, at: [] team_vlan_rx_add_vid+0x38/0x1d0 drivers/net/team/team.c:1889 but task is already holding lock: (&team->lock){+.+.}, at: [] team_add_slave+0x7d/0x1ad0 drivers/net/team/team.c:1967 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&team->lock); lock(&team->lock); *** DEADLOCK *** May be due to missing lock nesting notation 2 locks held by syz-executor.0/7679: #0: (rtnl_mutex){+.+.}, at: [] rtnl_lock net/core/rtnetlink.c:72 [inline] #0: (rtnl_mutex){+.+.}, at: [] rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4311 #1: (&team->lock){+.+.}, at: [] team_add_slave+0x7d/0x1ad0 drivers/net/team/team.c:1967 stack backtrace: CPU: 0 PID: 7679 Comm: syz-executor.0 Not tainted 4.14.195-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x283 lib/dump_stack.c:58 print_deadlock_bug kernel/locking/lockdep.c:1800 [inline] check_deadlock kernel/locking/lockdep.c:1847 [inline] validate_chain kernel/locking/lockdep.c:2448 [inline] __lock_acquire.cold+0x180/0x97c kernel/locking/lockdep.c:3491 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 team_vlan_rx_add_vid+0x38/0x1d0 drivers/net/team/team.c:1889 __vlan_vid_add net/8021q/vlan_core.c:219 [inline] vlan_vid_add+0x5ef/0x7d0 net/8021q/vlan_core.c:251 __vlan_vid_add net/8021q/vlan_core.c:219 [inline] vlan_vid_add+0x5ef/0x7d0 net/8021q/vlan_core.c:251 vlan_device_event.cold+0x23/0x28 net/8021q/vlan.c:372 notifier_call_chain+0x108/0x1a0 kernel/notifier.c:93 call_netdevice_notifiers_info net/core/dev.c:1667 [inline] call_netdevice_notifiers net/core/dev.c:1683 [inline] dev_open net/core/dev.c:1407 [inline] dev_open+0xf9/0x110 net/core/dev.c:1395 team_port_add drivers/net/team/team.c:1214 [inline] team_add_slave+0x954/0x1ad0 drivers/net/team/team.c:1968 do_set_master+0x19e/0x200 net/core/rtnetlink.c:1961 rtnl_newlink+0x134c/0x1830 net/core/rtnetlink.c:2757 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4316 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2433 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline] netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1313 netlink_sendmsg+0x62e/0xb80 net/netlink/af_netlink.c:1878 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062 __sys_sendmsg+0xa3/0x120 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x27/0x40 net/socket.c:2103 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45d5b9 RSP: 002b:00007f02dd5d6c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000002ce80 RCX: 000000000045d5b9 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003 RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c R13: 00007ffd3d2a361f R14: 00007f02dd5d79c0 R15: 000000000118cf4c team0: Device macvtap1 failed to register rx_handler audit: type=1804 audit(1598924767.179:493): pid=7692 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op="invalid_pcr" cause="open_writers" comm="syz-executor.3" name="/root/syzkaller-testdir843860058/syzkaller.E4B1Cx/935/bus" dev="sda1" ino=17234 res=1 audit: type=1804 audit(1598924767.409:494): pid=7710 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op="invalid_pcr" cause="ToMToU" comm="syz-executor.4" name="/root/syzkaller-testdir610673552/syzkaller.i9eLlq/156/file0" dev="sda1" ino=16457 res=1 IPv6: ADDRCONF(NETDEV_UP): macvtap1: link is not ready 8021q: adding VLAN 0 to HW filter on device macvtap1 team0: Device macvtap1 failed to register rx_handler audit: type=1804 audit(1598924767.419:495): pid=7710 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op="invalid_pcr" cause="ToMToU" comm="syz-executor.4" name="/root/syzkaller-testdir610673552/syzkaller.i9eLlq/156/file0" dev="sda1" ino=16457 res=1 audit: type=1804 audit(1598924767.639:496): pid=7692 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op="invalid_pcr" cause="ToMToU" comm="syz-executor.3" name="/root/syzkaller-testdir843860058/syzkaller.E4B1Cx/935/bus" dev="sda1" ino=17234 res=1 IPv6: ADDRCONF(NETDEV_UP): macvtap1: link is not ready audit: type=1804 audit(1598924767.639:497): pid=7732 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op="invalid_pcr" cause="open_writers" comm="syz-executor.3" name="/root/syzkaller-testdir843860058/syzkaller.E4B1Cx/935/bus" dev="sda1" ino=17234 res=1 8021q: adding VLAN 0 to HW filter on device macvtap1 team0: Device macvtap1 failed to register rx_handler REISERFS warning (device loop3): super-6508 reiserfs_parse_options: bad value 0x0000000000000000= for -ocommit IPVS: ftp: loaded support on port[0] = 21 BFS-fs: bfs_fill_super(): Inode 0x00000026 corrupted BFS-fs: bfs_fill_super(): Inode 0x00000026 corrupted attempt to access beyond end of device loop5: rw=1, want=230, limit=127 ip6_tables: ip6tables: counters copy to user failed while replacing table new mount options do not match the existing superblock, will be ignored hfs: dir_umask requires a value ip6_tables: ip6tables: counters copy to user failed while replacing table hfs: unable to parse mount options new mount options do not match the existing superblock, will be ignored ip6_tables: ip6tables: counters copy to user failed while replacing table audit: type=1804 audit(1598924769.559:498): pid=7918 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op="invalid_pcr" cause="open_writers" comm="syz-executor.1" name="/root/syzkaller-testdir179861148/syzkaller.xjkBIl/269/bus" dev="sda1" ino=16471 res=1 ip6_tables: ip6tables: counters copy to user failed while replacing table audit: type=1804 audit(1598924769.559:499): pid=7917 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op="invalid_pcr" cause="ToMToU" comm="syz-executor.1" name="/root/syzkaller-testdir179861148/syzkaller.xjkBIl/269/bus" dev="sda1" ino=16471 res=1 audit: type=1800 audit(1598924769.609:500): pid=7866 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed(directio)" comm="syz-executor.4" name="bus" dev="sda1" ino=16464 res=0 netlink: 24 bytes leftover after parsing attributes in process `syz-executor.1'. IPVS: ftp: loaded support on port[0] = 21 IPVS: length: 209 != 8 9pnet: Insufficient options for proto=fd overlayfs: filesystem on './file0' not supported as upperdir audit: type=1804 audit(1598924771.569:501): pid=8082 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op="invalid_pcr" cause="open_writers" comm="syz-executor.5" name="/root/syzkaller-testdir838623042/syzkaller.qsQEjl/51/bus" dev="sda1" ino=16496 res=1 audit: type=1804 audit(1598924771.599:502): pid=8082 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op="invalid_pcr" cause="ToMToU" comm="syz-executor.5" name="/root/syzkaller-testdir838623042/syzkaller.qsQEjl/51/bus" dev="sda1" ino=16496 res=1 XFS (loop0): Invalid superblock magic number netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'. IPVS: ftp: loaded support on port[0] = 21 block nbd3: Receive control failed (result -32) block nbd3: Device being setup by another task block nbd3: shutting down sockets netlink: 24 bytes leftover after parsing attributes in process `syz-executor.1'. kauditd_printk_skb: 4 callbacks suppressed audit: type=1800 audit(1598924775.049:507): pid=8266 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed(directio)" comm="syz-executor.0" name="bus" dev="sda1" ino=16502 res=0 netlink: 24 bytes leftover after parsing attributes in process `syz-executor.1'. IPVS: ftp: loaded support on port[0] = 21 audit: type=1326 audit(1598924775.409:508): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=8318 comm="syz-executor.1" exe="/root/syz-executor.1" sig=9 arch=c000003e syscall=228 compat=0 ip=0x4603fa code=0x0 device lo left promiscuous mode 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 chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect audit: type=1326 audit(1598924776.199:509): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=8318 comm="syz-executor.1" exe="/root/syz-executor.1" sig=9 arch=c000003e syscall=228 compat=0 ip=0x4603fa code=0x0 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. skbuff: skb_over_panic: text:ffffffff858be28f len:40 put:40 head:ffff88809214d040 data:ffff88809214d0f0 tail:0xd8 end:0xc0 dev:ip6gre0 ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:104! invalid opcode: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 1 PID: 18 Comm: kworker/1:0 Not tainted 4.14.195-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: ipv6_addrconf addrconf_dad_work task: ffff8880a98fe4c0 task.stack: ffff8880a9910000 RIP: 0010:skb_panic+0x172/0x174 net/core/skbuff.c:104 RSP: 0018:ffff8880a99178d0 EFLAGS: 00010282 RAX: 0000000000000086 RBX: ffff8880986dc300 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff86ac12c0 RDI: ffffed1015322f10 RBP: ffffffff8738bba0 R08: 0000000000000086 R09: 0000000000000000 R10: 0000000000000000 R11: ffff8880a98fe4c0 R12: ffffffff858be28f R13: 0000000000000028 R14: ffff888095548640 R15: 00000000000000c0 FS: 0000000000000000(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa5b4050000 CR3: 000000008c904000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_over_panic net/core/skbuff.c:109 [inline] skb_put.cold+0x24/0x24 net/core/skbuff.c:1699 ip6_mc_hdr.constprop.0+0x11f/0x580 net/ipv6/mcast.c:1552 mld_newpack+0x3aa/0x720 net/ipv6/mcast.c:1603 add_grhead+0x265/0x330 net/ipv6/mcast.c:1691 add_grec+0xc40/0xed0 net/ipv6/mcast.c:1822 mld_send_initial_cr.part.0+0xb0/0x140 net/ipv6/mcast.c:2072 mld_send_initial_cr net/ipv6/mcast.c:1170 [inline] ipv6_mc_dad_complete+0x183/0x5a0 net/ipv6/mcast.c:2084 addrconf_dad_completed+0x80f/0xa40 net/ipv6/addrconf.c:4060 addrconf_dad_begin net/ipv6/addrconf.c:3848 [inline] addrconf_dad_work+0x673/0xef0 net/ipv6/addrconf.c:3950 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Code: 8b 4c 24 10 8b 8b 80 00 00 00 41 56 45 89 e8 4c 89 e2 41 57 48 89 ee 48 c7 c7 40 b4 38 87 ff 74 24 10 ff 74 24 20 e8 95 68 3a fc <0f> 0b e8 2d c9 4b fc 4c 8b 64 24 18 e8 d3 7d 75 fc 48 c7 c1 60 RIP: skb_panic+0x172/0x174 net/core/skbuff.c:104 RSP: ffff8880a99178d0 ---[ end trace 4519f45a536d5388 ]---