IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready 8021q: adding VLAN 0 to HW filter on device team0 8021q: adding VLAN 0 to HW filter on device team0 INFO: task syz-executor3:7105 blocked for more than 140 seconds. Not tainted 4.16.0-rc4+ #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor3 D22488 7105 5553 0x00000004 Call Trace: context_switch kernel/sched/core.c:2862 [inline] __schedule+0x85b/0x2000 kernel/sched/core.c:3440 schedule+0xfe/0x460 kernel/sched/core.c:3499 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3557 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0xdcb/0x1a00 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 genl_lock net/netlink/genetlink.c:33 [inline] ctrl_getfamily+0x2c0/0x400 net/netlink/genetlink.c:871 genl_family_rcv_msg+0x6d4/0x1480 net/netlink/genetlink.c:599 genl_rcv_msg+0xa7/0x140 net/netlink/genetlink.c:624 netlink_rcv_skb+0x145/0x380 net/netlink/af_netlink.c:2444 genl_rcv+0x23/0x40 net/netlink/genetlink.c:635 netlink_unicast_kernel net/netlink/af_netlink.c:1308 [inline] netlink_unicast+0x463/0x680 net/netlink/af_netlink.c:1334 netlink_sendmsg+0x8eb/0xeb0 net/netlink/af_netlink.c:1897 sock_sendmsg_nosec net/socket.c:629 [inline] sock_sendmsg+0xb7/0xf0 net/socket.c:639 ___sys_sendmsg+0x68f/0x9c0 net/socket.c:2047 __sys_sendmsg+0xde/0x240 net/socket.c:2081 SYSC_sendmsg net/socket.c:2092 [inline] SyS_sendmsg+0xd/0x20 net/socket.c:2088 do_syscall_64+0x276/0x980 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4108c0 RSP: 002b:00007ff45e6c29c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00000000004108c0 RDX: 0000000000000000 RSI: 00007ff45e6c2a20 RDI: 0000000000000006 RBP: 00007ff45e6c2a20 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00000000004b3780 R14: 00000000006ec9f0 R15: 00000000ffffffff Showing all locks held in the system: 2 locks held by khungtaskd/995: #0: (rcu_read_lock){....}, at: [<0000000045151767>] check_hung_uninterruptible_tasks kernel/hung_task.c:175 [inline] #0: (rcu_read_lock){....}, at: [<0000000045151767>] watchdog+0x1a5/0xba0 kernel/hung_task.c:249 #1: (tasklist_lock){.+.+}, at: [<00000000c465aed1>] debug_show_all_locks+0xe6/0x366 kernel/locking/lockdep.c:4470 2 locks held by getty/5417: #0: (&tty->ldisc_sem){++++}, at: [<00000000ad6bfb65>] ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000466fe64e>] n_tty_read+0x2fd/0x1b20 drivers/tty/n_tty.c:2131 2 locks held by getty/5418: #0: (&tty->ldisc_sem){++++}, at: [<00000000ad6bfb65>] ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000466fe64e>] n_tty_read+0x2fd/0x1b20 drivers/tty/n_tty.c:2131 2 locks held by getty/5419: #0: (&tty->ldisc_sem){++++}, at: [<00000000ad6bfb65>] ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000466fe64e>] n_tty_read+0x2fd/0x1b20 drivers/tty/n_tty.c:2131 2 locks held by getty/5420: #0: (&tty->ldisc_sem){++++}, at: [<00000000ad6bfb65>] ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000466fe64e>] n_tty_read+0x2fd/0x1b20 drivers/tty/n_tty.c:2131 2 locks held by getty/5421: #0: (&tty->ldisc_sem){++++}, at: [<00000000ad6bfb65>] ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000466fe64e>] n_tty_read+0x2fd/0x1b20 drivers/tty/n_tty.c:2131 2 locks held by getty/5422: #0: (&tty->ldisc_sem){++++}, at: [<00000000ad6bfb65>] ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000466fe64e>] n_tty_read+0x2fd/0x1b20 drivers/tty/n_tty.c:2131 2 locks held by getty/5423: #0: (&tty->ldisc_sem){++++}, at: [<00000000ad6bfb65>] ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000466fe64e>] n_tty_read+0x2fd/0x1b20 drivers/tty/n_tty.c:2131 2 locks held by syz-executor3/7105: #0: (cb_lock){++++}, at: [<000000007c057a44>] ctrl_getfamily+0x2b2/0x400 net/netlink/genetlink.c:870 #1: (genl_mutex){+.+.}, at: [<00000000aa2cc4d2>] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [<00000000aa2cc4d2>] ctrl_getfamily+0x2c0/0x400 net/netlink/genetlink.c:871 2 locks held by syz-executor2/7107: #0: (cb_lock){++++}, at: [<000000007c057a44>] ctrl_getfamily+0x2b2/0x400 net/netlink/genetlink.c:870 #1: (genl_mutex){+.+.}, at: [<00000000aa2cc4d2>] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [<00000000aa2cc4d2>] ctrl_getfamily+0x2c0/0x400 net/netlink/genetlink.c:871 2 locks held by syz-executor5/7116: #0: (cb_lock){++++}, at: [<000000007c057a44>] ctrl_getfamily+0x2b2/0x400 net/netlink/genetlink.c:870 #1: (genl_mutex){+.+.}, at: [<00000000aa2cc4d2>] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [<00000000aa2cc4d2>] ctrl_getfamily+0x2c0/0x400 net/netlink/genetlink.c:871 2 locks held by syz-executor5/7135: #0: (cb_lock){++++}, at: [<00000000c5f18d2e>] genl_rcv+0x14/0x40 net/netlink/genetlink.c:634 #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_rcv_msg+0x10e/0x140 net/netlink/genetlink.c:622 2 locks held by syz-executor5/7156: #0: (cb_lock){++++}, at: [<00000000c5f18d2e>] genl_rcv+0x14/0x40 net/netlink/genetlink.c:634 #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_rcv_msg+0x10e/0x140 net/netlink/genetlink.c:622 2 locks held by syz-executor5/7161: #0: (cb_lock){++++}, at: [<00000000c5f18d2e>] genl_rcv+0x14/0x40 net/netlink/genetlink.c:634 #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_rcv_msg+0x10e/0x140 net/netlink/genetlink.c:622 2 locks held by syz-executor1/7132: #0: (cb_lock){++++}, at: [<00000000c5f18d2e>] genl_rcv+0x14/0x40 net/netlink/genetlink.c:634 #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_rcv_msg+0x10e/0x140 net/netlink/genetlink.c:622 2 locks held by syz-executor1/7147: #0: (cb_lock){++++}, at: [<00000000c5f18d2e>] genl_rcv+0x14/0x40 net/netlink/genetlink.c:634 #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_rcv_msg+0x10e/0x140 net/netlink/genetlink.c:622 2 locks held by syz-executor1/7157: #0: (cb_lock){++++}, at: [<00000000c5f18d2e>] genl_rcv+0x14/0x40 net/netlink/genetlink.c:634 #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_rcv_msg+0x10e/0x140 net/netlink/genetlink.c:622 2 locks held by syz-executor1/7164: #0: (cb_lock){++++}, at: [<00000000c5f18d2e>] genl_rcv+0x14/0x40 net/netlink/genetlink.c:634 #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_rcv_msg+0x10e/0x140 net/netlink/genetlink.c:622 2 locks held by syz-executor4/7139: #0: (cb_lock){++++}, at: [<00000000c5f18d2e>] genl_rcv+0x14/0x40 net/netlink/genetlink.c:634 #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_rcv_msg+0x10e/0x140 net/netlink/genetlink.c:622 2 locks held by syz-executor4/7152: #0: (cb_lock){++++}, at: [<00000000c5f18d2e>] genl_rcv+0x14/0x40 net/netlink/genetlink.c:634 #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_rcv_msg+0x10e/0x140 net/netlink/genetlink.c:622 2 locks held by syz-executor4/7159: #0: (cb_lock){++++}, at: [<00000000c5f18d2e>] genl_rcv+0x14/0x40 net/netlink/genetlink.c:634 #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_rcv_msg+0x10e/0x140 net/netlink/genetlink.c:622 2 locks held by syz-executor4/7166: #0: (cb_lock){++++}, at: [<00000000c5f18d2e>] genl_rcv+0x14/0x40 net/netlink/genetlink.c:634 #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_rcv_msg+0x10e/0x140 net/netlink/genetlink.c:622 2 locks held by syz-executor0/7154: #0: (cb_lock){++++}, at: [<00000000c5f18d2e>] genl_rcv+0x14/0x40 net/netlink/genetlink.c:634 #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_rcv_msg+0x10e/0x140 net/netlink/genetlink.c:622 2 locks held by syz-executor0/7158: #0: (cb_lock){++++}, at: [<00000000c5f18d2e>] genl_rcv+0x14/0x40 net/netlink/genetlink.c:634 #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_rcv_msg+0x10e/0x140 net/netlink/genetlink.c:622 2 locks held by syz-executor0/7160: #0: (cb_lock){++++}, at: [<00000000c5f18d2e>] genl_rcv+0x14/0x40 net/netlink/genetlink.c:634 #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_rcv_msg+0x10e/0x140 net/netlink/genetlink.c:622 2 locks held by syz-executor0/7169: #0: (cb_lock){++++}, at: [<00000000c5f18d2e>] genl_rcv+0x14/0x40 net/netlink/genetlink.c:634 #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [<000000008ba0bfe7>] genl_rcv_msg+0x10e/0x140 net/netlink/genetlink.c:622 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 995 Comm: khungtaskd Not tainted 4.16.0-rc4+ #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x153/0x201 lib/dump_stack.c:53 nmi_cpu_backtrace.cold.5+0x13/0xb2 lib/nmi_backtrace.c:103 nmi_trigger_cpumask_backtrace+0xf5/0x119 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:138 [inline] check_hung_task kernel/hung_task.c:132 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:190 [inline] watchdog+0x755/0xba0 kernel/hung_task.c:249 kthread+0x319/0x3e0 kernel/kthread.c:238 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:406 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 7118 Comm: syz-executor2 Not tainted 4.16.0-rc4+ #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014 RIP: 0010:tipc_sk_lookup+0x76d/0xe00 net/tipc/socket.c:2688 RSP: 0018:ffff88005c866940 EFLAGS: 00000286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffffed000b90cd36 RSI: 0000000000000003 RDI: ffffed000b90cd6e RBP: ffff88005c866bb8 R08: 0000000000000000 R09: ffffffff870252f3 R10: 0000000000000078 R11: ffffed000b90cd5a R12: 0000000000000000 R13: dffffc0000000000 R14: 1ffff1000b90cd42 R15: ffffed000b90cd5a FS: 00007f354fee1700(0000) GS:ffff88006c800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd6484c5db8 CR3: 000000006a79f000 CR4: 00000000007406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: tipc_nl_publ_dump+0x1e8/0xe4b net/tipc/socket.c:3362 __tipc_nl_compat_dumpit.isra.11+0x1e0/0xaa0 net/tipc/netlink_compat.c:192 tipc_nl_compat_publ_dump net/tipc/netlink_compat.c:919 [inline] tipc_nl_compat_sk_dump+0x7ff/0xc00 net/tipc/netlink_compat.c:967 __tipc_nl_compat_dumpit.isra.11+0x2ce/0xaa0 net/tipc/netlink_compat.c:201 tipc_nl_compat_dumpit+0x1a5/0x400 net/tipc/netlink_compat.c:265 tipc_nl_compat_handle net/tipc/netlink_compat.c:1141 [inline] tipc_nl_compat_recv+0x670/0x1710 net/tipc/netlink_compat.c:1204 genl_family_rcv_msg+0x6d4/0x1480 net/netlink/genetlink.c:599 genl_rcv_msg+0xa7/0x140 net/netlink/genetlink.c:624 netlink_rcv_skb+0x145/0x380 net/netlink/af_netlink.c:2444 genl_rcv+0x23/0x40 net/netlink/genetlink.c:635 netlink_unicast_kernel net/netlink/af_netlink.c:1308 [inline] netlink_unicast+0x463/0x680 net/netlink/af_netlink.c:1334 netlink_sendmsg+0x8eb/0xeb0 net/netlink/af_netlink.c:1897 sock_sendmsg_nosec net/socket.c:629 [inline] sock_sendmsg+0xb7/0xf0 net/socket.c:639 ___sys_sendmsg+0x68f/0x9c0 net/socket.c:2047 __sys_sendmsg+0xde/0x240 net/socket.c:2081 SYSC_sendmsg net/socket.c:2092 [inline] SyS_sendmsg+0xd/0x20 net/socket.c:2088 do_syscall_64+0x276/0x980 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4570d9 RSP: 002b:00007f354fee0c88 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000071bfa0 RCX: 00000000004570d9 RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000005 RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f354fee16d4 R13: 00000000004ab484 R14: 00000000006ea0f8 R15: 00000000ffffffff Code: 00 48 c7 c7 80 f4 98 88 e8 91 21 54 fa 31 c0 b9 07 00 00 00 48 ba 00 00 00 00 00 fc ff df 48 03 95 d0 fd ff ff 48 89 d7 f3 48 ab <48> 89 d8 48 8b 5d d0 65 48 33 1c 25 28 00 00 00 0f 85 d3 05 00