IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready 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 INFO: task syz-executor3:30050 blocked for more than 140 seconds. Not tainted 4.19.0-rc5+ #261 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor3 D23488 30050 28171 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473 schedule+0xfe/0x460 kernel/sched/core.c:3517 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3575 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0xbe7/0x1700 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 perf_trace_init+0x58/0x250 kernel/trace/trace_event_perf.c:218 perf_tp_event_init+0xa6/0x120 kernel/events/core.c:8350 perf_try_init_event+0x137/0x2f0 kernel/events/core.c:9744 perf_init_event kernel/events/core.c:9782 [inline] perf_event_alloc.part.93+0x1b5b/0x35f0 kernel/events/core.c:10048 perf_event_alloc kernel/events/core.c:10404 [inline] __do_sys_perf_event_open+0xa9c/0x2f30 kernel/events/core.c:10505 __se_sys_perf_event_open kernel/events/core.c:10394 [inline] __x64_sys_perf_event_open+0xbe/0x150 kernel/events/core.c:10394 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457579 Code: 24 08 48 89 01 e8 d7 2d fc ff e8 22 7a fc ff b8 02 00 00 00 48 8d 0d 6a 60 09 01 87 01 8b 05 62 60 09 01 83 f8 01 0f 85 8a 00 <00> 00 b8 01 00 00 00 88 05 9e 65 09 01 84 c0 74 72 b8 01 00 00 00 RSP: 002b:00007ff8bac4cc78 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457579 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020940000 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007ff8bac4d6d4 R13: 00000000004c2f90 R14: 00000000004d4818 R15: 00000000ffffffff INFO: task syz-executor1:30052 blocked for more than 140 seconds. Not tainted 4.19.0-rc5+ #261 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor1 D24648 30052 28509 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473 schedule+0xfe/0x460 kernel/sched/core.c:3517 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3575 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0xbe7/0x1700 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 perf_trace_init+0x58/0x250 kernel/trace/trace_event_perf.c:218 perf_tp_event_init+0xa6/0x120 kernel/events/core.c:8350 perf_try_init_event+0x137/0x2f0 kernel/events/core.c:9744 perf_init_event kernel/events/core.c:9782 [inline] perf_event_alloc.part.93+0x1b5b/0x35f0 kernel/events/core.c:10048 perf_event_alloc kernel/events/core.c:10404 [inline] __do_sys_perf_event_open+0xa9c/0x2f30 kernel/events/core.c:10505 __se_sys_perf_event_open kernel/events/core.c:10394 [inline] __x64_sys_perf_event_open+0xbe/0x150 kernel/events/core.c:10394 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457579 Code: 24 08 48 89 01 e8 d7 2d fc ff e8 22 7a fc ff b8 02 00 00 00 48 8d 0d 6a 60 09 01 87 01 8b 05 62 60 09 01 83 f8 01 0f 85 8a 00 <00> 00 b8 01 00 00 00 88 05 9e 65 09 01 84 c0 74 72 b8 01 00 00 00 RSP: 002b:00007f25af16dc78 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457579 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020940000 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f25af16e6d4 R13: 00000000004c2f90 R14: 00000000004d4818 R15: 00000000ffffffff INFO: task syz-executor4:30609 blocked for more than 140 seconds. Not tainted 4.19.0-rc5+ #261 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor4 D23488 30609 30119 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473 schedule+0xfe/0x460 kernel/sched/core.c:3517 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3575 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0xbe7/0x1700 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 perf_trace_init+0x58/0x250 kernel/trace/trace_event_perf.c:218 perf_tp_event_init+0xa6/0x120 kernel/events/core.c:8350 perf_try_init_event+0x137/0x2f0 kernel/events/core.c:9744 perf_init_event kernel/events/core.c:9782 [inline] perf_event_alloc.part.93+0x1b5b/0x35f0 kernel/events/core.c:10048 perf_event_alloc kernel/events/core.c:10404 [inline] __do_sys_perf_event_open+0xa9c/0x2f30 kernel/events/core.c:10505 __se_sys_perf_event_open kernel/events/core.c:10394 [inline] __x64_sys_perf_event_open+0xbe/0x150 kernel/events/core.c:10394 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457579 Code: Bad RIP value. RSP: 002b:00007f49f0817c78 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457579 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020940000 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f49f08186d4 R13: 00000000004c2f90 R14: 00000000004d4818 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/982: #0: 000000003b1a80ab (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4435 1 lock held by rsyslogd/5219: #0: 00000000b89cc390 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:766 2 locks held by getty/5309: #0: 0000000053b6e7ac (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000ad1f4a22 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5310: #0: 00000000fd4a344e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000cb5a1c54 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5311: #0: 00000000ff82801e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000009def3ab9 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5312: #0: 00000000251539b9 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000ed6459da (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5313: #0: 000000002bd6f157 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000001b0781ca (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5314: #0: 000000009f933a00 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000ed0aac57 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5315: #0: 000000005148e0de (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000024b971d7 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 1 lock held by syz-executor4/30038: 3 locks held by syz-executor3/30050: #0: 00000000e5534a0e (&sig->cred_guard_mutex){+.+.}, at: __do_sys_perf_event_open+0x12fe/0x2f30 kernel/events/core.c:10485 #1: 000000004e676723 (&pmus_srcu){....}, at: fdput include/linux/file.h:42 [inline] #1: 000000004e676723 (&pmus_srcu){....}, at: perf_cgroup_connect kernel/events/core.c:925 [inline] #1: 000000004e676723 (&pmus_srcu){....}, at: perf_event_alloc.part.93+0x18a1/0x35f0 kernel/events/core.c:10043 #2: 00000000b42faba7 (event_mutex){+.+.}, at: perf_trace_init+0x58/0x250 kernel/trace/trace_event_perf.c:218 3 locks held by syz-executor1/30052: #0: 00000000fd4697c4 (&sig->cred_guard_mutex){+.+.}, at: __do_sys_perf_event_open+0x12fe/0x2f30 kernel/events/core.c:10485 #1: 000000004e676723 (&pmus_srcu){....}, at: fdput include/linux/file.h:42 [inline] #1: 000000004e676723 (&pmus_srcu){....}, at: perf_cgroup_connect kernel/events/core.c:925 [inline] #1: 000000004e676723 (&pmus_srcu){....}, at: perf_event_alloc.part.93+0x18a1/0x35f0 kernel/events/core.c:10043 #2: 00000000b42faba7 (event_mutex){+.+.}, at: perf_trace_init+0x58/0x250 kernel/trace/trace_event_perf.c:218 3 locks held by syz-executor4/30609: #0: 0000000072804231 (&sig->cred_guard_mutex){+.+.}, at: __do_sys_perf_event_open+0x12fe/0x2f30 kernel/events/core.c:10485 #1: 000000004e676723 (&pmus_srcu){....}, at: fdput include/linux/file.h:42 [inline] #1: 000000004e676723 (&pmus_srcu){....}, at: perf_cgroup_connect kernel/events/core.c:925 [inline] #1: 000000004e676723 (&pmus_srcu){....}, at: perf_event_alloc.part.93+0x18a1/0x35f0 kernel/events/core.c:10043 #2: 00000000b42faba7 (event_mutex){+.+.}, at: perf_trace_init+0x58/0x250 kernel/trace/trace_event_perf.c:218 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 982 Comm: khungtaskd Not tainted 4.19.0-rc5+ #261 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+0x1c4/0x2b4 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.3+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b3/0x1ed 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:144 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline] watchdog+0xb3e/0x1050 kernel/hung_task.c:265 kthread+0x35a/0x420 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:57