IPVS: ftp: loaded support on port[0] = 21 INFO: task syz-executor.2:1180 blocked for more than 140 seconds. Not tainted 5.0.0+ #12 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28376 1180 7248 0xa0020002 rpcbind: RPC call returned error 22 kobject: 'loop4' (000000006677c0d7): kobject_uevent_env kobject: 'loop4' (000000006677c0d7): fill_kobj_path: path = '/devices/virtual/block/loop4' Call Trace: net_ratelimit: 28 callbacks suppressed protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 kobject: 'lo' (00000000a15e0729): kobject_add_internal: parent: 'net', set: 'devices' context_switch kernel/sched/core.c:2877 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3620 kobject: 'lo' (00000000a15e0729): kobject_uevent_env __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1310 kernel/locking/mutex.c:1072 kobject: 'loop3' (00000000db7c5a44): kobject_uevent_env kobject: 'lo' (00000000a15e0729): fill_kobj_path: path = '/devices/virtual/net/lo' kobject: 'loop3' (00000000db7c5a44): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'queues' (000000006c43d595): kobject_add_internal: parent: 'lo', set: '' rpcbind: RPC call returned error 22 kobject: 'queues' (000000006c43d595): kobject_uevent_env kobject: 'loop4' (000000006677c0d7): kobject_uevent_env kobject: 'kvm' (0000000083d30d12): kobject_uevent_env kobject: 'queues' (000000006c43d595): kobject_uevent_env: filter function caused the event to drop! kobject: 'loop4' (000000006677c0d7): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'kvm' (0000000083d30d12): fill_kobj_path: path = '/devices/virtual/misc/kvm' mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 kobject: 'rx-0' (0000000056484a94): kobject_add_internal: parent: 'queues', set: 'queues' vhost_net_stop_vq+0x2d/0x120 drivers/vhost/net.c:1360 vhost_net_stop drivers/vhost/net.c:1374 [inline] vhost_net_release+0x5d/0x260 drivers/vhost/net.c:1406 kobject: 'rx-0' (0000000056484a94): kobject_uevent_env __fput+0x2df/0x8d0 fs/file_table.c:278 kobject: 'rx-0' (0000000056484a94): fill_kobj_path: path = '/devices/virtual/net/lo/queues/rx-0' ____fput+0x16/0x20 fs/file_table.c:309 task_work_run+0x14a/0x1c0 kernel/task_work.c:113 kobject: 'tx-0' (000000003fee00f2): kobject_add_internal: parent: 'queues', set: 'queues' exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x90a/0x2fa0 kernel/exit.c:876 kobject: 'tx-0' (000000003fee00f2): kobject_uevent_env kobject: 'kvm' (0000000083d30d12): kobject_uevent_env kobject: 'tx-0' (000000003fee00f2): fill_kobj_path: path = '/devices/virtual/net/lo/queues/tx-0' kobject: 'kvm' (0000000083d30d12): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'tunl0' (0000000005eba983): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'loop3' (00000000db7c5a44): kobject_uevent_env kobject: 'loop3' (00000000db7c5a44): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'tunl0' (0000000005eba983): kobject_uevent_env kobject: 'loop4' (000000006677c0d7): kobject_uevent_env kobject: 'tunl0' (0000000005eba983): fill_kobj_path: path = '/devices/virtual/net/tunl0' kobject: 'loop4' (000000006677c0d7): fill_kobj_path: path = '/devices/virtual/block/loop4' do_group_exit+0x135/0x370 kernel/exit.c:980 kobject: 'queues' (00000000f77e8d63): kobject_add_internal: parent: 'tunl0', set: '' __do_sys_exit_group kernel/exit.c:991 [inline] __se_sys_exit_group kernel/exit.c:989 [inline] __ia32_sys_exit_group+0x44/0x50 kernel/exit.c:989 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x281/0xc98 arch/x86/entry/common.c:397 kobject: 'queues' (00000000f77e8d63): kobject_uevent_env entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 kobject: 'queues' (00000000f77e8d63): kobject_uevent_env: filter function caused the event to drop! RIP: 0023:0xf7ff4869 kobject: 'rx-0' (00000000607ffec9): kobject_add_internal: parent: 'queues', set: 'queues' Code: Bad RIP value. RSP: 002b:000000000845fb7c EFLAGS: 00000202 ORIG_RAX: 00000000000000fc kobject: 'rx-0' (00000000607ffec9): kobject_uevent_env RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000845fbdc RDX: 0000000000000001 RSI: 000000000814afd8 RDI: 00000000080a81d2 kobject: 'rx-0' (00000000607ffec9): fill_kobj_path: path = '/devices/virtual/net/tunl0/queues/rx-0' RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 kobject: 'tx-0' (00000000efa0f54b): kobject_add_internal: parent: 'queues', set: 'queues' R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Showing all locks held in the system: kobject: 'tx-0' (00000000efa0f54b): kobject_uevent_env 4 locks held by kworker/u4:3/423: #0: 00000000d2bae155 ((wq_completion)netns){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 00000000d2bae155 ((wq_completion)netns){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000d2bae155 ((wq_completion)netns){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 00000000d2bae155 ((wq_completion)netns){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 00000000d2bae155 ((wq_completion)netns){+.+.}, at: set_work_data kernel/workqueue.c:619 [inline] #0: 00000000d2bae155 ((wq_completion)netns){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: 00000000d2bae155 ((wq_completion)netns){+.+.}, at: process_one_work+0x87e/0x1790 kernel/workqueue.c:2230 kobject: 'tx-0' (00000000efa0f54b): fill_kobj_path: path = '/devices/virtual/net/tunl0/queues/tx-0' #1: 000000000065b0cc (net_cleanup_work){+.+.}, at: process_one_work+0x8b4/0x1790 kernel/workqueue.c:2234 #2: 0000000038e0d136 (pernet_ops_rwsem){++++}, at: cleanup_net+0xae/0x960 net/core/net_namespace.c:518 kobject: 'gre0' (0000000070412bd0): kobject_add_internal: parent: 'net', set: 'devices' #3: 00000000151f35e6 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 1 lock held by khungtaskd/1042: #0: 000000003a3ec5b9 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:5052 kobject: 'gre0' (0000000070412bd0): kobject_uevent_env 1 lock held by rsyslogd/7115: kobject: 'gre0' (0000000070412bd0): fill_kobj_path: path = '/devices/virtual/net/gre0' #0: 000000009b11b4b9 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:796 kobject: 'queues' (0000000024619b45): kobject_add_internal: parent: 'gre0', set: '' 2 locks held by getty/7207: #0: 00000000b58876d5 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 kobject: 'queues' (0000000024619b45): kobject_uevent_env protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 kobject: 'queues' (0000000024619b45): kobject_uevent_env: filter function caused the event to drop! protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 kobject: 'rx-0' (00000000fcc55724): kobject_add_internal: parent: 'queues', set: 'queues' #1: 00000000285d7e9a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7208: kobject: 'rx-0' (00000000fcc55724): kobject_uevent_env #0: 00000000f1d77f57 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 kobject: 'rx-0' (00000000fcc55724): fill_kobj_path: path = '/devices/virtual/net/gre0/queues/rx-0' #1: 00000000fb661a30 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 kobject: 'tx-0' (000000004953c454): kobject_add_internal: parent: 'queues', set: 'queues' 2 locks held by getty/7209: #0: 00000000994e99f6 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 kobject: 'tx-0' (000000004953c454): kobject_uevent_env #1: 0000000036d11a6a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7210: #0: 000000005f67dc5d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 kobject: 'tx-0' (000000004953c454): fill_kobj_path: path = '/devices/virtual/net/gre0/queues/tx-0' #1: 000000004e5bc842 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7211: kobject: 'gretap0' (0000000081eec2eb): kobject_add_internal: parent: 'net', set: 'devices' #0: 00000000215e461b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000005fedc7fd (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 kobject: 'gretap0' (0000000081eec2eb): kobject_uevent_env 2 locks held by getty/7212: #0: 00000000d5e39f65 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 kobject: 'gretap0' (0000000081eec2eb): fill_kobj_path: path = '/devices/virtual/net/gretap0' #1: 0000000083e17d76 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7213: #0: 00000000922fb6af (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 kobject: 'queues' (0000000068f36143): kobject_add_internal: parent: 'gretap0', set: '' #1: 000000000b83e504 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 kobject: 'queues' (0000000068f36143): kobject_uevent_env 1 lock held by syz-executor.2/1180: kobject: 'queues' (0000000068f36143): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (0000000078d55637): kobject_add_internal: parent: 'queues', set: 'queues' #0: 000000004eeb2460 (&vq->mutex){+.+.}, at: vhost_net_stop_vq+0x2d/0x120 drivers/vhost/net.c:1360 kobject: 'rx-0' (0000000078d55637): kobject_uevent_env kobject: 'rx-0' (0000000078d55637): fill_kobj_path: path = '/devices/virtual/net/gretap0/queues/rx-0' 1 lock held by vhost-1181/1185: kobject: 'tx-0' (00000000baff9bd3): kobject_add_internal: parent: 'queues', set: 'queues' 5 locks held by syz-executor.0/529: kobject: 'tx-0' (00000000baff9bd3): kobject_uevent_env kobject: 'tx-0' (00000000baff9bd3): fill_kobj_path: path = '/devices/virtual/net/gretap0/queues/tx-0' ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1042 Comm: khungtaskd Not tainted 5.0.0+ #12 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+0x172/0x1f0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 kobject: 'batman_adv' (000000001be4d92c): kobject_add_internal: parent: 'gretap0', set: '' nmi_trigger_cpumask_backtrace+0x1be/0x236 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:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x9b2/0xeb0 kernel/hung_task.c:287 kthread+0x357/0x430 kernel/kthread.c:253 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 0 to CPUs 1: kobject: 'erspan0' (00000000fad065ac): kobject_add_internal: parent: 'net', set: 'devices' NMI backtrace for cpu 1 CPU: 1 PID: 529 Comm: syz-executor.0 Not tainted 5.0.0+ #12 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:preempt_count_sub+0x15/0x160 kernel/sched/core.c:3258 Code: d0 e8 1f 98 5a 00 8b 4d d0 e9 65 fe ff ff 0f 1f 80 00 00 00 00 48 c7 c0 a0 19 5b 8a 55 48 ba 00 00 00 00 00 fc ff df 48 89 c1 <48> 89 e5 53 83 e0 07 48 c1 e9 03 83 c0 03 89 fb 0f b6 14 11 38 d0 RSP: 0018:ffff8880ae907cb0 EFLAGS: 00000086 RAX: ffffffff8a5b19a0 RBX: 0000000000000082 RCX: ffffffff8a5b19a0 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000001 RBP: ffff8880ae907cd0 R08: ffff888085e1c240 R09: fffffbfff14d5b56 R10: fffffbfff14d5b55 R11: ffffffff8a6adaab R12: ffffffff8a6adaa8 R13: ffff888067026598 R14: ffff888096951c18 R15: 1ffff11015d20fa0 FS: 0000000000000000(0000) GS:ffff8880ae900000(0063) knlGS:00000000f5deeb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00007f9e24c17000 CR3: 000000018b4f6000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: debug_object_activate+0x206/0x4f0 lib/debugobjects.c:498 debug_hrtimer_activate kernel/time/hrtimer.c:407 [inline] debug_activate kernel/time/hrtimer.c:456 [inline] enqueue_hrtimer+0x2a/0x3f0 kernel/time/hrtimer.c:945 __run_hrtimer kernel/time/hrtimer.c:1404 [inline] __hrtimer_run_queues+0xa83/0xde0 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline] smp_apic_timer_interrupt+0x120/0x570 arch/x86/kernel/apic/apic.c:1060 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:767 [inline] RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1697 [inline] RIP: 0010:vprintk_emit+0x5f8/0x6d0 kernel/printk/printk.c:1930 Code: 00 48 b8 00 00 00 00 00 fc ff df 41 80 3c 06 00 0f 85 95 00 00 00 48 83 3d 14 e2 37 07 00 74 29 e8 1d a2 15 00 48 89 df 57 9d <0f> 1f 44 00 00 e9 c5 fe ff ff e8 09 a2 15 00 0f 0b e8 02 a2 15 00 RSP: 0018:ffff88821b7bf5c8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000040000 RBX: 0000000000000246 RCX: ffffc90005deb000 RDX: 0000000000040000 RSI: ffffffff815aafa3 RDI: 0000000000000246 RBP: ffff88821b7bf610 R08: ffff888085e1c240 R09: ffff888085e1cb08 R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000005a R13: 0000000000000200 R14: 1ffffffff1125236 R15: ffff8880a82d8700 vprintk_default+0x28/0x30 kernel/printk/printk.c:1958 vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398 printk+0xba/0xed kernel/printk/printk.c:1991 kobject_add_internal lib/kobject.c:242 [inline] kobject_add_internal.cold+0xd2/0x5d4 lib/kobject.c:217 kobject_add_varg lib/kobject.c:382 [inline] kobject_add+0x150/0x1c0 lib/kobject.c:426 device_add+0x3d5/0x18a0 drivers/base/core.c:2057 netdev_register_kobject+0x183/0x3b0 net/core/net-sysfs.c:1746 register_netdevice+0x878/0xff0 net/core/dev.c:8711 __ip_tunnel_create+0x36b/0x530 net/ipv4/ip_tunnel.c:282 ip_tunnel_init_net+0x375/0x9e0 net/ipv4/ip_tunnel.c:1070 erspan_init_net+0x2a/0x30 net/ipv4/ip_gre.c:1589 ops_init+0xb6/0x410 net/core/net_namespace.c:129 setup_net+0x2c5/0x730 net/core/net_namespace.c:314 copy_net_ns+0x1d9/0x340 net/core/net_namespace.c:437 create_new_namespaces+0x400/0x7b0 kernel/nsproxy.c:107 unshare_nsproxy_namespaces+0xc2/0x200 kernel/nsproxy.c:206 ksys_unshare+0x440/0x980 kernel/fork.c:2550 __do_sys_unshare kernel/fork.c:2618 [inline] __se_sys_unshare kernel/fork.c:2616 [inline] __ia32_sys_unshare+0x30/0x40 kernel/fork.c:2616 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x281/0xc98 arch/x86/entry/common.c:397 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7ff2869 Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f5dee0cc EFLAGS: 00000296 ORIG_RAX: 0000000000000136 RAX: ffffffffffffffda RBX: 0000000040000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 kobject: 'loop5' (00000000f9ece1eb): kobject_uevent_env kobject: 'erspan0' (00000000fad065ac): kobject_uevent_env kobject: 'loop5' (00000000f9ece1eb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'erspan0' (00000000fad065ac): fill_kobj_path: path = '/devices/virtual/net/erspan0'