INFO: task kworker/0:3:4004 blocked for more than 143 seconds. Not tainted 5.7.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/0:3 D24400 4004 2 0x80004000 Workqueue: events nsim_dev_trap_report_work Call Trace: context_switch kernel/sched/core.c:3367 [inline] __schedule+0x937/0x1ff0 kernel/sched/core.c:4083 schedule+0xd0/0x2a0 kernel/sched/core.c:4158 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4217 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x7ab/0x13c0 kernel/locking/mutex.c:1103 nsim_dev_trap_report_work+0x5d/0xbc0 drivers/net/netdevsim/dev.c:585 process_one_work+0x965/0x16a0 kernel/workqueue.c:2268 worker_thread+0x96/0xe20 kernel/workqueue.c:2414 kthread+0x388/0x470 kernel/kthread.c:268 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351 INFO: task syz-executor.3:8396 blocked for more than 143 seconds. Not tainted 5.7.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D26440 8396 7372 0x00004004 Call Trace: context_switch kernel/sched/core.c:3367 [inline] __schedule+0x937/0x1ff0 kernel/sched/core.c:4083 schedule+0xd0/0x2a0 kernel/sched/core.c:4158 schedule_timeout+0x55b/0x850 kernel/time/timer.c:1874 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x16a/0x270 kernel/sched/completion.c:138 __flush_work+0x4fd/0xa80 kernel/workqueue.c:3045 flush_all_backlogs net/core/dev.c:5537 [inline] rollback_registered_many+0x562/0xe70 net/core/dev.c:8823 rollback_registered+0xf2/0x1c0 net/core/dev.c:8883 unregister_netdevice_queue net/core/dev.c:9981 [inline] unregister_netdevice_queue+0x1d7/0x2b0 net/core/dev.c:9974 unregister_netdevice include/linux/netdevice.h:2725 [inline] nsim_destroy+0x35/0x60 drivers/net/netdevsim/netdev.c:330 __nsim_dev_port_del+0x144/0x1e0 drivers/net/netdevsim/dev.c:933 nsim_dev_port_del_all+0x86/0xe0 drivers/net/netdevsim/dev.c:946 nsim_dev_reload_destroy+0x77/0x110 drivers/net/netdevsim/dev.c:1122 nsim_dev_reload_down+0x6e/0xd0 drivers/net/netdevsim/dev.c:703 devlink_reload+0xbd/0x3b0 net/core/devlink.c:2797 devlink_nl_cmd_reload+0x2f7/0x7c0 net/core/devlink.c:2832 genl_family_rcv_msg_doit net/netlink/genetlink.c:673 [inline] genl_family_rcv_msg net/netlink/genetlink.c:718 [inline] genl_rcv_msg+0x627/0xdf0 net/netlink/genetlink.c:735 netlink_rcv_skb+0x15a/0x410 net/netlink/af_netlink.c:2469 genl_rcv+0x24/0x40 net/netlink/genetlink.c:746 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x537/0x740 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x882/0xe10 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:672 ____sys_sendmsg+0x6bf/0x7e0 net/socket.c:2362 ___sys_sendmsg+0x100/0x170 net/socket.c:2416 __sys_sendmsg+0xec/0x1b0 net/socket.c:2449 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca29 Code: Bad RIP value. RSP: 002b:00007f9a8b6b8c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004fd100 RCX: 000000000045ca29 RDX: 0000000000000000 RSI: 0000000020000800 RDI: 0000000000000006 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000090b R14: 00000000004cbd20 R15: 00007f9a8b6b96d4 INFO: task syz-executor.3:8438 blocked for more than 144 seconds. Not tainted 5.7.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D29296 8438 7372 0x00004004 Call Trace: context_switch kernel/sched/core.c:3367 [inline] __schedule+0x937/0x1ff0 kernel/sched/core.c:4083 schedule+0xd0/0x2a0 kernel/sched/core.c:4158 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4217 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x7ab/0x13c0 kernel/locking/mutex.c:1103 sock_do_ioctl+0x24e/0x2f0 net/socket.c:1066 sock_ioctl+0x3ec/0x790 net/socket.c:1204 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0x11a/0x180 fs/ioctl.c:771 __do_sys_ioctl fs/ioctl.c:780 [inline] __se_sys_ioctl fs/ioctl.c:778 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:778 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca29 Code: Bad RIP value. RSP: 002b:00007f9a8b676c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e9380 RCX: 000000000045ca29 RDX: 0000000000400200 RSI: 0000000000008912 RDI: 0000000000000005 RBP: 000000000078c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000415 R14: 00000000004c6d64 R15: 00007f9a8b6776d4 INFO: task syz-executor.3:8439 blocked for more than 144 seconds. Not tainted 5.7.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D27696 8439 7372 0x00000004 Call Trace: context_switch kernel/sched/core.c:3367 [inline] __schedule+0x937/0x1ff0 kernel/sched/core.c:4083 schedule+0xd0/0x2a0 kernel/sched/core.c:4158 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4217 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x7ab/0x13c0 kernel/locking/mutex.c:1103 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x763/0xdf0 net/netlink/genetlink.c:733 netlink_rcv_skb+0x15a/0x410 net/netlink/af_netlink.c:2469 genl_rcv+0x24/0x40 net/netlink/genetlink.c:746 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x537/0x740 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x882/0xe10 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:672 ____sys_sendmsg+0x6bf/0x7e0 net/socket.c:2362 ___sys_sendmsg+0x100/0x170 net/socket.c:2416 __sys_sendmsg+0xec/0x1b0 net/socket.c:2449 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x416741 Code: Bad RIP value. RSP: 002b:00007f9a8b6559c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f9a8b655a58 RCX: 0000000000416741 RDX: 0000000000000000 RSI: 00007f9a8b655a00 RDI: 0000000000000007 RBP: 0000000000000007 R08: 0000000000000008 R09: 0000000000000000 R10: 00007f9a8b6569d0 R11: 0000000000000293 R12: 00007f9a8b655a40 R13: 0000000000000bc4 R14: 00000000004d82f0 R15: 00007f9a8b6566d4 INFO: task syz-executor.3:8440 blocked for more than 145 seconds. Not tainted 5.7.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D28408 8440 7372 0x00004004 Call Trace: context_switch kernel/sched/core.c:3367 [inline] __schedule+0x937/0x1ff0 kernel/sched/core.c:4083 schedule+0xd0/0x2a0 kernel/sched/core.c:4158 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4217 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x7ab/0x13c0 kernel/locking/mutex.c:1103 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x763/0xdf0 net/netlink/genetlink.c:733 netlink_rcv_skb+0x15a/0x410 net/netlink/af_netlink.c:2469 genl_rcv+0x24/0x40 net/netlink/genetlink.c:746 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x537/0x740 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x882/0xe10 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:672 ____sys_sendmsg+0x6bf/0x7e0 net/socket.c:2362 ___sys_sendmsg+0x100/0x170 net/socket.c:2416 __sys_sendmsg+0xec/0x1b0 net/socket.c:2449 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca29 Code: Bad RIP value. RSP: 002b:00007f9a8b634c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004fd100 RCX: 000000000045ca29 RDX: 0000000000000000 RSI: 0000000020000800 RDI: 0000000000000006 RBP: 000000000078c180 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000090b R14: 00000000004cbd20 R15: 00007f9a8b6356d4 Showing all locks held in the system: 1 lock held by khungtaskd/1145: #0: ffffffff899bea80 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5754 3 locks held by kworker/0:3/4004: #0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline] #0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x844/0x16a0 kernel/workqueue.c:2239 #1: ffffc90005fa7dc0 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work+0x878/0x16a0 kernel/workqueue.c:2243 #2: ffff888096341370 (&nsim_dev->port_list_lock#2){+.+.}-{3:3}, at: nsim_dev_trap_report_work+0x5d/0xbc0 drivers/net/netdevsim/dev.c:585 1 lock held by in:imklog/6732: #0: ffff8880a640c630 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:826 3 locks held by kworker/u4:7/7015: 3 locks held by kworker/1:7/7306: #0: ffff8882150f0138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: ffff8882150f0138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8882150f0138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: ffff8882150f0138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: ffff8882150f0138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff8882150f0138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline] #0: ffff8882150f0138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x844/0x16a0 kernel/workqueue.c:2239 #1: ffffc900064cfdc0 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x878/0x16a0 kernel/workqueue.c:2243 #2: ffffffff8a586a88 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4584 6 locks held by syz-executor.3/8396: #0: ffffffff8a5dde50 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:745 #1: ffffffff8a5ddf08 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8a5ddf08 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x763/0xdf0 net/netlink/genetlink.c:733 #2: ffffffff8a5a6f48 (devlink_mutex){+.+.}-{3:3}, at: devlink_nl_pre_doit+0x27/0x6c0 net/core/devlink.c:401 #3: ffff888096341370 (&nsim_dev->port_list_lock#2){+.+.}-{3:3}, at: nsim_dev_port_del_all+0x28/0xe0 drivers/net/netdevsim/dev.c:943 #4: ffffffff8a586a88 (rtnl_mutex){+.+.}-{3:3}, at: nsim_destroy+0x2b/0x60 drivers/net/netdevsim/netdev.c:329 #5: ffffffff89979a70 (cpu_hotplug_lock){++++}-{0:0}, at: get_online_cpus include/linux/cpu.h:143 [inline] #5: ffffffff89979a70 (cpu_hotplug_lock){++++}-{0:0}, at: flush_all_backlogs net/core/dev.c:5530 [inline] #5: ffffffff89979a70 (cpu_hotplug_lock){++++}-{0:0}, at: rollback_registered_many+0x45b/0xe70 net/core/dev.c:8823 1 lock held by syz-executor.3/8438: #0: ffffffff8a586a88 (rtnl_mutex){+.+.}-{3:3}, at: sock_do_ioctl+0x24e/0x2f0 net/socket.c:1066 2 locks held by syz-executor.3/8439: #0: ffffffff8a5dde50 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:745 #1: ffffffff8a5ddf08 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8a5ddf08 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x763/0xdf0 net/netlink/genetlink.c:733 2 locks held by syz-executor.3/8440: #0: ffffffff8a5dde50 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:745 #1: ffffffff8a5ddf08 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8a5ddf08 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x763/0xdf0 net/netlink/genetlink.c:733 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1145 Comm: khungtaskd Not tainted 5.7.0-rc7-syzkaller #0 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+0x188/0x20d lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x231/0x27e lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0xa8c/0x1010 kernel/hung_task.c:289 kthread+0x388/0x470 kernel/kthread.c:268 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 8377 Comm: syz-executor.5 Not tainted 5.7.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:arch_local_save_flags arch/x86/include/asm/paravirt.h:754 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/paravirt.h:776 [inline] RIP: 0010:lock_is_held_type+0x8b/0x350 kernel/locking/lockdep.c:4967 Code: c0 94 89 48 b9 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 08 00 0f 85 c3 02 00 00 48 83 3d 04 07 3c 08 00 0f 84 ff 01 00 00 9c <58> 0f 1f 44 00 00 48 b9 00 00 00 00 00 fc ff df 48 89 44 24 10 48 RSP: 0018:ffffc9000713fd60 EFLAGS: 00000282 RAX: 1ffffffff132980b RBX: ffff8880913da280 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffff8880913dab44 RBP: ffffffff8837c080 R08: 0000000000000001 R09: ffffed1009aec461 R10: ffff88804d762307 R11: ffffed1009aec460 R12: 0000000000001c9b R13: ffff88804d762160 R14: ffff88804d762110 R15: ffffffff899be9c0 FS: 0000000001d10940(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3392d000 CR3: 000000005023f000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: io_ring_ctx_wait_and_kill+0x5f0/0x5f0 fs/io_uring.c:7336