device bridge_slave_1 left promiscuous mode bridge0: port 2(bridge_slave_1) entered disabled state device bridge_slave_0 left promiscuous mode bridge0: port 1(bridge_slave_0) entered disabled state INFO: task kworker/1:3:24603 blocked for more than 140 seconds. Not tainted 4.19.88-syzkaller #0 kobject: 'rx-0' (000000001ccc9750): kobject_cleanup, parent 00000000c31a1e2c "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kobject: 'rx-0' (000000001ccc9750): auto cleanup 'remove' event kworker/1:3 D27024 24603 2 0x80000000 kobject: 'rx-0' (000000001ccc9750): kobject_uevent_env Workqueue: events linkwatch_event kobject: 'rx-0' (000000001ccc9750): kobject_uevent_env: uevent_suppress caused the event to drop! Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 kobject: 'rx-0' (000000001ccc9750): auto cleanup kobject_del kobject: 'rx-0' (000000001ccc9750): calling ktype release kobject: 'rx-0': free name schedule+0x92/0x1c0 kernel/sched/core.c:3559 kobject: 'tx-0' (0000000081680ff8): kobject_cleanup, parent 00000000c31a1e2c schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3617 kobject: 'tx-0' (0000000081680ff8): auto cleanup 'remove' event __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 kobject: 'tx-0' (0000000081680ff8): kobject_uevent_env kobject: 'tx-0' (0000000081680ff8): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'tx-0' (0000000081680ff8): auto cleanup kobject_del kobject: 'tx-0' (0000000081680ff8): calling ktype release kobject: 'tx-0': free name kobject: 'queues' (00000000c31a1e2c): kobject_cleanup, parent (null) mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 kobject: 'queues' (00000000c31a1e2c): calling ktype release kobject: 'queues' (00000000c31a1e2c): kset_release kobject: 'queues': free name rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 kobject: 'bridge694' (00000000a7429ba9): kobject_uevent_env linkwatch_event+0xf/0x70 net/core/link_watch.c:236 kobject: 'bridge694' (00000000a7429ba9): kobject_uevent_env: uevent_suppress caused the event to drop! process_one_work+0x989/0x1750 kernel/workqueue.c:2153 kobject: 'batman_adv' (00000000bbc952a1): kobject_uevent_env kobject: 'batman_adv' (00000000bbc952a1): kobject_uevent_env: filter function caused the event to drop! kobject: 'batman_adv' (00000000bbc952a1): kobject_cleanup, parent (null) kobject: 'batman_adv' (00000000bbc952a1): calling ktype release kobject: (00000000bbc952a1): dynamic_kobj_release kobject: 'batman_adv': free name worker_thread+0x98/0xe40 kernel/workqueue.c:2296 kthread+0x354/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 INFO: task kworker/1:4:18201 blocked for more than 140 seconds. Not tainted 4.19.88-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/1:4 D26912 18201 2 0x80000000 Workqueue: events switchdev_deferred_process_work Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3617 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:150 process_one_work+0x989/0x1750 kernel/workqueue.c:2153 worker_thread+0x98/0xe40 kernel/workqueue.c:2296 kthread+0x354/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 INFO: task syz-executor.1:13491 blocked for more than 140 seconds. kobject: 'rx-0' (0000000062d44e06): kobject_cleanup, parent 00000000976c009e Not tainted 4.19.88-syzkaller #0 kobject: 'rx-0' (0000000062d44e06): auto cleanup 'remove' event kobject: 'rx-0' (0000000062d44e06): kobject_uevent_env "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28216 13491 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 kobject: 'rx-0' (0000000062d44e06): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'rx-0' (0000000062d44e06): auto cleanup kobject_del schedule+0x92/0x1c0 kernel/sched/core.c:3559 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3617 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 kobject: 'rx-0' (0000000062d44e06): calling ktype release kobject: 'rx-0': free name kobject: 'tx-0' (0000000094aa73ff): kobject_cleanup, parent 00000000976c009e kobject: 'tx-0' (0000000094aa73ff): auto cleanup 'remove' event mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 kobject: 'tx-0' (0000000094aa73ff): kobject_uevent_env kobject: 'tx-0' (0000000094aa73ff): kobject_uevent_env: uevent_suppress caused the event to drop! rtnl_lock net/core/rtnetlink.c:77 [inline] rtnetlink_rcv_msg+0x40a/0xb00 net/core/rtnetlink.c:4765 netlink_rcv_skb+0x17d/0x460 net/netlink/af_netlink.c:2454 kobject: 'tx-0' (0000000094aa73ff): auto cleanup kobject_del kobject: 'tx-0' (0000000094aa73ff): calling ktype release kobject: 'tx-0': free name kobject: 'queues' (00000000976c009e): kobject_cleanup, parent (null) rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:4786 kobject: 'queues' (00000000976c009e): calling ktype release netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x53a/0x730 net/netlink/af_netlink.c:1343 kobject: 'queues' (00000000976c009e): kset_release kobject: 'queues': free name netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1908 kobject: 'bridge693' (00000000c0de0379): kobject_uevent_env kobject: 'bridge693' (00000000c0de0379): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'batman_adv' (00000000166ae4a8): kobject_uevent_env kobject: 'batman_adv' (00000000166ae4a8): kobject_uevent_env: filter function caused the event to drop! sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:632 __sys_sendto+0x262/0x380 net/socket.c:1787 kobject: 'batman_adv' (00000000166ae4a8): kobject_cleanup, parent (null) kobject: 'batman_adv' (00000000166ae4a8): calling ktype release kobject: (00000000166ae4a8): dynamic_kobj_release kobject: 'batman_adv': free name __do_sys_sendto net/socket.c:1799 [inline] __se_sys_sendto net/socket.c:1795 [inline] __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1795 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x414543 Code: 80 38 20 0f 84 13 01 00 00 c6 01 00 48 89 44 24 08 89 54 24 04 48 89 ee 48 89 df e8 37 74 00 00 eb 13 0f 1f 44 00 00 8b 05 32 <9f> 24 00 85 c0 0f 85 ba 00 00 00 48 8b 74 24 08 48 2b 73 68 48 89 RSP: 002b:00007fff12da5ab8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000a72200 RCX: 0000000000414543 RDX: 0000000000000028 RSI: 0000000000a72250 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007fff12da5ac0 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000a72250 R15: 0000000000000003 Showing all locks held in the system: 3 locks held by kworker/0:0/5: #0: 00000000b3abf72e ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 00000000b3abf72e ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000b3abf72e ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 00000000b3abf72e ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 00000000b3abf72e ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 00000000b3abf72e ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 00000000b3abf72e ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 #1: 0000000093f83b90 ((addr_chk_work).work){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 #2: 00000000e138693b (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 1 lock held by khungtaskd/1068: #0: 000000000fa6d8a6 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4438 1 lock held by rsyslogd/8022: #0: 00000000410d94b4 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:767 2 locks held by getty/8144: #0: 000000009ea2b895 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000f7a3a303 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/8145: #0: 00000000f12973f3 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000006bf22696 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/8146: #0: 000000004dcf3f31 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 0000000011ca14a1 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/8147: #0: 00000000ac4b29bc (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000002a7e7ec0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/8148: #0: 00000000990cc7ac (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000bd6980e7 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/8149: #0: 00000000c583d276 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 0000000091599558 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/8150: #0: 00000000461b25d2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 0000000071d8c49c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 3 locks held by kworker/1:3/24603: #0: 000000009cfea446 ((wq_completion)"events"){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 000000009cfea446 ((wq_completion)"events"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 000000009cfea446 ((wq_completion)"events"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 000000009cfea446 ((wq_completion)"events"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 000000009cfea446 ((wq_completion)"events"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 000000009cfea446 ((wq_completion)"events"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 000000009cfea446 ((wq_completion)"events"){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 #1: 00000000d8a6dbe5 ((linkwatch_work).work){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 #2: 00000000e138693b (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 4 locks held by kworker/u4:5/2135: #0: 000000003b2ad347 ((wq_completion)"%s""netns"){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 000000003b2ad347 ((wq_completion)"%s""netns"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 000000003b2ad347 ((wq_completion)"%s""netns"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 000000003b2ad347 ((wq_completion)"%s""netns"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 000000003b2ad347 ((wq_completion)"%s""netns"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 000000003b2ad347 ((wq_completion)"%s""netns"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 000000003b2ad347 ((wq_completion)"%s""netns"){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 #1: 00000000f1a4930f (net_cleanup_work){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 #2: 000000006304d223 (pernet_ops_rwsem){++++}, at: cleanup_net+0xae/0x960 net/core/net_namespace.c:520 #3: 00000000e138693b (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 3 locks held by kworker/1:4/18201: #0: 000000009cfea446 ((wq_completion)"events"){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 000000009cfea446 ((wq_completion)"events"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 000000009cfea446 ((wq_completion)"events"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 000000009cfea446 ((wq_completion)"events"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 000000009cfea446 ((wq_completion)"events"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 000000009cfea446 ((wq_completion)"events"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 000000009cfea446 ((wq_completion)"events"){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 #1: 0000000000636a5a (deferred_process_work){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 #2: 00000000e138693b (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 1 lock held by syz-executor.1/13491: #0: 00000000e138693b (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline] #0: 00000000e138693b (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x40a/0xb00 net/core/rtnetlink.c:4765 ============================================= kobject: 'rx-0' (0000000021794b6e): kobject_cleanup, parent 00000000783cc28a NMI backtrace for cpu 0 CPU: 0 PID: 1068 Comm: khungtaskd Not tainted 4.19.88-syzkaller #0 kobject: 'rx-0' (0000000021794b6e): auto cleanup 'remove' event 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+0x197/0x210 lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 lib/nmi_backtrace.c:62 kobject: 'rx-0' (0000000021794b6e): kobject_uevent_env 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+0x9df/0xee0 kernel/hung_task.c:287 kthread+0x354/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: kobject: 'rx-0' (0000000021794b6e): kobject_uevent_env: uevent_suppress caused the event to drop! NMI backtrace for cpu 1 CPU: 1 PID: 2135 Comm: kworker/u4:5 Not tainted 4.19.88-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net RIP: 0010:__sanitizer_cov_trace_pc+0x1/0x50 kernel/kcov.c:94 Code: bc f4 ff ff ff e8 43 65 ea ff 48 c7 05 14 3a 5e 09 00 00 00 00 e9 96 e9 ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 <48> 89 e5 48 8b 75 08 65 48 8b 04 25 40 ee 01 00 65 8b 15 78 aa 96 RSP: 0018:ffff88800d057260 EFLAGS: 00000002 RAX: 0000000000000000 RBX: 00000000fffffffd RCX: ffffffff874775f5 RDX: 0000000000000003 RSI: 0000000000000004 RDI: 0000000000000004 RBP: ffff88800d057398 R08: ffff88802f90a240 R09: fffffbfff11f19c9 R10: fffffbfff11f19c8 R11: ffffffff88f8ce43 R12: 0000000000000003 R13: dffffc0000000000 R14: 0000000000000003 R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 000000008f8ad000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vsnprintf+0x26b/0x19a0 lib/vsprintf.c:2359 snprintf+0xbb/0xf0 lib/vsprintf.c:2426 print_time kernel/printk/printk.c:1234 [inline] print_prefix+0x284/0x3f0 kernel/printk/printk.c:1259 msg_print_text+0x83/0x1c0 kernel/printk/printk.c:1282 console_unlock+0x3a5/0x10d0 kernel/printk/printk.c:2403 vprintk_emit+0x280/0x6d0 kernel/printk/printk.c:1937 vprintk_default+0x28/0x30 kernel/printk/printk.c:1979 vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398 printk+0xba/0xed kernel/printk/printk.c:2012 kobject_uevent_env+0x1f5/0x101f lib/kobject_uevent.c:494 kobject_uevent+0x20/0x26 lib/kobject_uevent.c:639 kobject_cleanup lib/kobject.c:649 [inline] kobject_release lib/kobject.c:691 [inline] kref_put include/linux/kref.h:70 [inline] kobject_put.cold+0x177/0x2e6 lib/kobject.c:708 net_rx_queue_update_kobjects+0x361/0x480 net/core/net-sysfs.c:979 remove_queue_kobjects net/core/net-sysfs.c:1567 [inline] netdev_unregister_kobject+0x155/0x1f0 net/core/net-sysfs.c:1718 rollback_registered_many+0x6bb/0xda0 net/core/dev.c:8043 unregister_netdevice_many.part.0+0x1b/0x1f0 net/core/dev.c:9129 unregister_netdevice_many net/core/dev.c:9128 [inline] default_device_exit_batch+0x34e/0x410 net/core/dev.c:9600 ops_exit_list.isra.0+0xfc/0x150 net/core/net_namespace.c:156 cleanup_net+0x404/0x960 net/core/net_namespace.c:553 process_one_work+0x989/0x1750 kernel/workqueue.c:2153 worker_thread+0x98/0xe40 kernel/workqueue.c:2296 kthread+0x354/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415