INFO: task kworker/1:3:4838 blocked for more than 143 seconds. Not tainted 5.11.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:3 state:D stack:25056 pid: 4838 ppid: 2 flags:0x00004000 Workqueue: events nsim_dev_trap_report_work Call Trace: context_switch kernel/sched/core.c:4324 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5075 schedule+0xcf/0x270 kernel/sched/core.c:5154 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5213 __mutex_lock_common kernel/locking/mutex.c:1023 [inline] __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1093 nsim_dev_trap_report_work+0x5d/0xbd0 drivers/net/netdevsim/dev.c:606 process_one_work+0x98d/0x1600 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Showing all locks held in the system: 1 lock held by khungtaskd/1668: #0: ffffffff8bf74160 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6327 1 lock held by khugepaged/1675: #0: ffffffff8c04e8c8 ( lock #5 ){+.+.}-{3:3}, at: lru_add_drain_all+0x5f/0x6f0 mm/swap.c:777 1 lock held by systemd-journal/4812: 3 locks held by kworker/1:3/4838: #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 kernel/workqueue.c:2246 #1: ffffc9000160fda8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 kernel/workqueue.c:2250 #2: ffff88804e71e390 (&nsim_dev->port_list_lock){+.+.}-{3:3}, at: nsim_dev_trap_report_work+0x5d/0xbd0 drivers/net/netdevsim/dev.c:606 1 lock held by in:imklog/8082: 6 locks held by kworker/0:11/28649: 7 locks held by kworker/u4:0/8765: #0: ffff8881407a3138 ( (wq_completion)netns ){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] ){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] ){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] ){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] ){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] ){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 kernel/workqueue.c:2246 #1: ffffc90017a87da8 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 kernel/workqueue.c:2250 #2: ffffffff8d669490 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xb10 net/core/net_namespace.c:557 #3: ffffffff8d6a9de8 (devlink_mutex){+.+.}-{3:3}, at: devlink_pernet_pre_exit+0x6f/0x220 net/core/devlink.c:10579 #4: ffff88804e71e390 (&nsim_dev->port_list_lock){+.+.}-{3:3}, at: nsim_dev_port_del_all drivers/net/netdevsim/dev.c:977 [inline] #4: ffff88804e71e390 (&nsim_dev->port_list_lock){+.+.}-{3:3}, at: nsim_dev_reload_destroy+0x9e/0x1e0 drivers/net/netdevsim/dev.c:1160 #5: ffffffff8d67cbe8 (rtnl_mutex){+.+.}-{3:3}, at: nsim_destroy+0x2b/0x70 drivers/net/netdevsim/netdev.c:337 #6: ffffffff8bf7cd28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline] #6: ffffffff8bf7cd28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x4fa/0x620 kernel/rcu/tree_exp.h:836 1 lock held by syz-executor.0/19803: #0: ffffffff8d67cbe8 (rtnl_mutex){+.+.}-{3:3}, at: netdev_run_todo+0x90a/0xdd0 net/core/dev.c:10469 1 lock held by syz-executor.4/19805: #0: ffffffff8d67cbe8 (rtnl_mutex){+.+.}-{3:3}, at: netdev_run_todo+0x90a/0xdd0 net/core/dev.c:10469 1 lock held by syz-executor.3/19807: #0: ffffffff8d67cbe8 (rtnl_mutex){+.+.}-{3:3}, at: netdev_run_todo+0x90a/0xdd0 net/core/dev.c:10469 3 locks held by kworker/1:0/21246: #0: ffff8881472ca938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881472ca938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff8881472ca938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff8881472ca938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff8881472ca938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff8881472ca938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 kernel/workqueue.c:2246 #1: ffffc900016efda8 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 kernel/workqueue.c:2250 #2: ffffffff8d67cbe8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xa3/0x12b0 net/ipv6/addrconf.c:4031 1 lock held by syz-executor.2/21320: #0: ffffffff8d67cbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d67cbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3f9/0xad0 net/core/rtnetlink.c:5550 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1668 Comm: khungtaskd Not tainted 5.11.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xfa/0x151 lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0xd48/0xfb0 kernel/hung_task.c:294 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 28649 Comm: kworker/0:11 Not tainted 5.11.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events uhid_device_add_worker RIP: 0010:pvclock_read_begin arch/x86/include/asm/pvclock.h:23 [inline] RIP: 0010:pvclock_clocksource_read+0x31/0x530 arch/x86/kernel/pvclock.c:75 Code: fc ff df 48 89 f8 41 57 48 c1 e8 03 41 56 41 55 41 54 4c 8d 67 03 55 4c 89 e1 53 48 c1 e9 03 48 89 fb 48 83 ec 58 0f b6 04 10 <0f> b6 14 11 48 89 f9 83 e1 07 38 c8 0f 9e c1 84 c0 0f 95 c0 84 c1 RSP: 0018:ffffc90000007ec0 EFLAGS: 00000086 RAX: 0000000000000000 RBX: ffffffff8f394000 RCX: 1ffffffff1e72800 RDX: dffffc0000000000 RSI: 0000000000010001 RDI: ffffffff8f394000 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8dc6278f R10: fffffbfff1b8c4f1 R11: 0000000000000000 R12: ffffffff8f394003 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1268004ab0 CR3: 000000002d24e000 CR4: 0000000000350ef0 Call Trace: kvm_clock_read arch/x86/kernel/kvmclock.c:89 [inline] kvm_sched_clock_read+0x14/0x40 arch/x86/kernel/kvmclock.c:101 paravirt_sched_clock arch/x86/include/asm/paravirt.h:22 [inline] sched_clock+0x2a/0x40 arch/x86/kernel/tsc.c:252 sched_clock_cpu+0x18/0x1f0 kernel/sched/clock.c:371 irqtime_account_irq+0x73/0x2d0 kernel/sched/cputime.c:61 account_hardirq_exit include/linux/vtime.h:125 [inline] __irq_exit_rcu kernel/softirq.c:419 [inline] irq_exit_rcu+0x1a/0x200 kernel/softirq.c:434 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:197 Code: e9 22 fd ff ff b9 ff ff ff ff ba 08 00 00 00 4d 8b 03 48 0f bd ca 49 8b 45 00 48 63 c9 e9 64 ff ff ff 0f 1f 84 00 00 00 00 00 <65> 8b 05 49 98 8e 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b RSP: 0018:ffffc9001bba7430 EFLAGS: 00000206 RAX: 000000000069dbeb RBX: 0000000000000000 RCX: 1ffffffff1f641a2 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9001bba7470 R08: 0000000000000001 R09: ffffffff8fab597f R10: 0000000000000001 R11: 0000000000000000 R12: 000000000000003e R13: ffff88801512b780 R14: 0000000000000200 R15: 0000000000000000 console_trylock_spinning kernel/printk/printk.c:1818 [inline] vprintk_emit+0x323/0x470 kernel/printk/printk.c:2097 dev_vprintk_emit+0x36e/0x3b2 drivers/base/core.c:4434 dev_printk_emit+0xba/0xf1 drivers/base/core.c:4445 __dev_printk+0xcf/0xf5 drivers/base/core.c:4457 _dev_warn+0xd7/0x109 drivers/base/core.c:4501 hid_parser_main.cold+0xa2/0xf1 drivers/hid/hid-core.c:630 hid_open_report+0x37f/0x660 drivers/hid/hid-core.c:1260 hid_parse include/linux/hid.h:1043 [inline] hid_generic_probe+0x4a/0x90 drivers/hid/hid-generic.c:63 hid_device_probe+0x2bd/0x3f0 drivers/hid/hid-core.c:2284 really_probe+0x291/0xe60 drivers/base/dd.c:554 driver_probe_device+0x26b/0x3d0 drivers/base/dd.c:740 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:846 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:431 __device_attach+0x228/0x4a0 drivers/base/dd.c:914 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491 device_add+0xbdb/0x1db0 drivers/base/core.c:3242 hid_add_device+0x344/0x9d0 drivers/hid/hid-core.c:2440 uhid_device_add_worker+0x36/0x60 drivers/hid/uhid.c:62 process_one_work+0x98d/0x1600 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294