device lo left promiscuous mode device lo entered promiscuous mode INFO: task kworker/u4:10:541 blocked for more than 143 seconds. Not tainted 6.0.0-rc3-next-20220829 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:10 state:D stack:25160 pid:541 ppid:2 flags:0x00004000 Workqueue: events_unbound io_ring_exit_work Call Trace: __schedule+0x893/0x24a0 schedule+0xda/0x1b0 schedule_timeout+0x3ad/0x480 __wait_for_common+0x1c3/0x4c0 io_ring_exit_work+0x4aa/0xc33 process_one_work+0xa0f/0x1690 worker_thread+0x637/0x1260 kthread+0x2ed/0x3a0 ret_from_fork+0x22/0x30 Showing all threads with locks held in the system: task:rcu_tasks_kthre state:I stack:29264 pid:11 ppid:2 flags:0x00004000 Call Trace: __schedule+0x893/0x24a0 schedule+0xda/0x1b0 rcu_tasks_one_gp+0x3db/0xc10 rcu_tasks_kthread+0x80/0xa0 kthread+0x2ed/0x3a0 ret_from_fork+0x22/0x30 1 lock held by rcu_tasks_kthre/11: #0: ffffffff85404c10 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc10 task:in:imklog state:R stack:27872 pid:192 ppid:1 flags:0x00000000 Call Trace: __schedule+0x893/0x24a0 schedule+0xda/0x1b0 syslog_print+0x1c2/0x590 do_syslog.part.0+0x276/0x6a0 do_syslog+0x49/0x70 kmsg_read+0x8a/0xb0 proc_reg_read+0x11c/0x300 vfs_read+0x253/0x930 ksys_read+0x127/0x250 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f477b05108c RSP: 002b:00007f477a5ed4d0 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f477b05108c RDX: 0000000000001fa0 RSI: 00007f477a5edd00 RDI: 0000000000000005 RBP: 00005582177314c0 R08: 0000000000000000 R09: 000055821772de88 R10: a3d70a3d70a3d70b R11: 0000000000000246 R12: 00007f477a5edd00 R13: 0000000000001fa0 R14: 00007f477a5edd00 R15: 00007f477a5edda8 1 lock held by in:imklog/192: #0: ffff88800f9d6fe8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe7/0x100 task:syz-fuzzer state:S stack:25016 pid:266 ppid:259 flags:0x00000000 Call Trace: __schedule+0x893/0x24a0 schedule+0xda/0x1b0 futex_wait_queue+0x144/0x3c0 futex_wait+0x28e/0x690 do_futex+0x2ff/0x380 __x64_sys_futex+0x1c6/0x4d0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x466533 RSP: 002b:000000c00003fe80 EFLAGS: 00000206 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 000000000015b978 RCX: 0000000000466533 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 0000000001f20e78 RBP: 000000c00003fec8 R08: 0000000000000000 R09: 0000000000000000 R10: 000000c00003feb8 R11: 0000000000000206 R12: 0000000000438880 R13: 000000000123be80 R14: 0000000000000003 R15: 0000000000000003 no locks held by syz-fuzzer/266. task:kworker/u4:10 state:D stack:25160 pid:541 ppid:2 flags:0x00004000 Workqueue: events_unbound io_ring_exit_work Call Trace: __schedule+0x893/0x24a0 schedule+0xda/0x1b0 schedule_timeout+0x3ad/0x480 __wait_for_common+0x1c3/0x4c0 io_ring_exit_work+0x4aa/0xc33 process_one_work+0xa0f/0x1690 worker_thread+0x637/0x1260 kthread+0x2ed/0x3a0 ret_from_fork+0x22/0x30 2 locks held by kworker/u4:10/541: #0: ffff888007c61138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x90d/0x1690 #1: ffff888017e7fdb0 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x941/0x1690 =============================================