[ 621.589494][ T69] sched: DL replenish lagged too much [ 621.589983][ C2] [ 621.589985][ C2] ======================================================== [ 621.589987][ C2] WARNING: possible irq lock inversion dependency detected [ 621.589990][ C2] 6.17.0-rc3-virtme #1 Not tainted [ 621.589993][ C2] -------------------------------------------------------- [ 621.589994][ C2] kworker/u19:1/69 just changed the state of lock: [ 621.589996][ C2] ffffffff8b077e80 (console_owner){-...}-{0:0}, at: console_lock_spinning_enable+0x7d/0xb0 [ 621.590013][ C2] but this lock took another, HARDIRQ-unsafe lock in the past: [ 621.590015][ C2] (_xmit_ETHER#2){+.-.}-{3:3} [ 621.590018][ C2] [ 621.590018][ C2] [ 621.590018][ C2] and interrupts could create inverse lock ordering between them. [ 621.590018][ C2] [ 621.590020][ C2] [ 621.590020][ C2] other info that might help us debug this: [ 621.590021][ C2] Chain exists of: [ 621.590021][ C2] console_owner --> target_list_lock --> _xmit_ETHER#2 [ 621.590021][ C2] [ 621.590026][ C2] Possible interrupt unsafe locking scenario: [ 621.590026][ C2] [ 621.590027][ C2] CPU0 CPU1 [ 621.590028][ C2] ---- ---- [ 621.590029][ C2] lock(_xmit_ETHER#2); [ 621.590031][ C2] local_irq_disable(); [ 621.590032][ C2] lock(console_owner); [ 621.590034][ C2] lock(target_list_lock); [ 621.590036][ C2] [ 621.590037][ C2] lock(console_owner); [ 621.590038][ C2] [ 621.590038][ C2] *** DEADLOCK *** [ 621.590038][ C2] [ 621.590039][ C2] 7 locks held by kworker/u19:1/69: [ 621.590041][ C2] #0: ffff8880010d1d48 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x7e5/0x1650 [ 621.590052][ C2] #1: ffffc900004a7d40 ((work_completion)(&buf->work)){+.+.}-{0:0}, at: process_one_work+0xded/0x1650 [ 621.590059][ C2] #2: ffff8880060d80b8 (&buf->lock){+.+.}-{4:4}, at: flush_to_ldisc+0x36/0x700 [ 621.590069][ C2] #3: ffff8880029d68a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref+0x1e/0x70 [ 621.590076][ C2] #4: ffff8880029d6ae8 (&tty->termios_rwsem){++++}-{4:4}, at: n_tty_receive_buf_common+0x7c/0xb00 [ 621.590082][ C2] #5: ffffffff8b1584e0 (console_lock){+.+.}-{0:0}, at: irq_work_single+0x108/0x210 [ 621.590091][ C2] #6: ffffffff8b158550 (console_srcu){....}-{0:0}, at: console_flush_all+0x12f/0x620 [ 621.590097][ C2] [ 621.590097][ C2] the shortest dependencies between 2nd lock and 1st lock: [ 621.590104][ C2] -> (_xmit_ETHER#2){+.-.}-{3:3} { [ 621.590108][ C2] HARDIRQ-ON-W at: [ 621.590110][ C2] __lock_acquire+0x20b/0x7e0 [ 621.590115][ C2] lock_acquire.part.0+0xb6/0x240 [ 621.590118][ C2] _raw_spin_trylock+0x69/0x80 [ 621.590127][ C2] virtnet_poll_cleantx.isra.0+0x1fe/0x500 [ 621.590133][ C2] virtnet_poll+0xf9/0xad0 [ 621.590136][ C2] __napi_poll.constprop.0+0x9f/0x460 [ 621.590140][ C2] net_rx_action+0x54f/0xda0 [ 621.590142][ C2] handle_softirqs+0x215/0x610 [ 621.590147][ C2] do_softirq+0xad/0xe0 [ 621.590150][ C2] __local_bh_enable_ip+0x101/0x120 [ 621.590153][ C2] virtnet_open+0x228/0xb40 [ 621.590156][ C2] __dev_open+0x224/0x670 [ 621.590158][ C2] __dev_change_flags+0x460/0x6c0 [ 621.590160][ C2] netif_change_flags+0x80/0x160 [ 621.590163][ C2] do_setlink.constprop.0+0x984/0x2640 [ 621.590168][ C2] rtnl_newlink+0x693/0xa60 [ 621.590170][ C2] rtnetlink_rcv_msg+0x709/0xc00 [ 621.590172][ C2] netlink_rcv_skb+0x121/0x340 [ 621.590177][ C2] netlink_unicast+0x4aa/0x780 [ 621.590179][ C2] netlink_sendmsg+0x71d/0xbe0 [ 621.590182][ C2] ____sys_sendmsg+0x3dd/0x890 [ 621.590187][ C2] ___sys_sendmsg+0xed/0x170 [ 621.590191][ C2] __sys_sendmsg+0x10b/0x1a0 [ 621.590194][ C2] do_syscall_64+0xc1/0x370 [ 621.590198][ C2] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 621.590202][ C2] IN-SOFTIRQ-W at: [ 621.590204][ C2] __lock_acquire+0x20b/0x7e0 [ 621.590206][ C2] lock_acquire.part.0+0xb6/0x240 [ 621.590209][ C2] _raw_spin_lock+0x33/0x40 [ 621.590212][ C2] virtnet_poll_tx+0x1da/0x6f0 [ 621.590214][ C2] __napi_poll.constprop.0+0x9f/0x460 [ 621.590216][ C2] net_rx_action+0x54f/0xda0 [ 621.590218][ C2] handle_softirqs+0x215/0x610 [ 621.590220][ C2] do_softirq+0xad/0xe0 [ 621.590223][ C2] __local_bh_enable_ip+0x101/0x120 [ 621.590225][ C2] virtnet_napi_tx_enable+0x1b1/0x270 [ 621.590227][ C2] virtnet_open+0x27c/0xb40 [ 621.590230][ C2] __dev_open+0x224/0x670 [ 621.590232][ C2] __dev_change_flags+0x460/0x6c0 [ 621.590234][ C2] netif_change_flags+0x80/0x160 [ 621.590236][ C2] do_setlink.constprop.0+0x984/0x2640 [ 621.590239][ C2] rtnl_newlink+0x693/0xa60 [ 621.590241][ C2] rtnetlink_rcv_msg+0x709/0xc00 [ 621.590244][ C2] netlink_rcv_skb+0x121/0x340 [ 621.590246][ C2] netlink_unicast+0x4aa/0x780 [ 621.590249][ C2] netlink_sendmsg+0x71d/0xbe0 [ 621.590251][ C2] ____sys_sendmsg+0x3dd/0x890 [ 621.590253][ C2] ___sys_sendmsg+0xed/0x170 [ 621.590256][ C2] __sys_sendmsg+0x10b/0x1a0 [ 621.590259][ C2] do_syscall_64+0xc1/0x370 [ 621.590262][ C2] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 621.590264][ C2] INITIAL USE at: [ 621.590265][ C2] __lock_acquire+0x20b/0x7e0 [ 621.590267][ C2] lock_acquire.part.0+0xb6/0x240 [ 621.590270][ C2] _raw_spin_trylock+0x69/0x80 [ 621.590273][ C2] virtnet_poll_cleantx.isra.0+0x1fe/0x500 [ 621.590275][ C2] virtnet_poll+0xf9/0xad0 [ 621.590278][ C2] __napi_poll.constprop.0+0x9f/0x460 [ 621.590280][ C2] net_rx_action+0x54f/0xda0 [ 621.590282][ C2] handle_softirqs+0x215/0x610 [ 621.590284][ C2] do_softirq+0xad/0xe0 [ 621.590287][ C2] __local_bh_enable_ip+0x101/0x120 [ 621.590289][ C2] virtnet_open+0x228/0xb40 [ 621.590291][ C2] __dev_open+0x224/0x670 [ 621.590293][ C2] __dev_change_flags+0x460/0x6c0 [ 621.590295][ C2] netif_change_flags+0x80/0x160 [ 621.590297][ C2] do_setlink.constprop.0+0x984/0x2640 [ 621.590299][ C2] rtnl_newlink+0x693/0xa60 [ 621.590302][ C2] rtnetlink_rcv_msg+0x709/0xc00 [ 621.590304][ C2] netlink_rcv_skb+0x121/0x340 [ 621.590306][ C2] netlink_unicast+0x4aa/0x780 [ 621.590308][ C2] netlink_sendmsg+0x71d/0xbe0 [ 621.590311][ C2] ____sys_sendmsg+0x3dd/0x890 [ 621.590313][ C2] ___sys_sendmsg+0xed/0x170 [ 621.590316][ C2] __sys_sendmsg+0x10b/0x1a0 [ 621.590319][ C2] do_syscall_64+0xc1/0x370 [ 621.590321][ C2] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 621.590323][ C2] } [ 621.590324][ C2] ... key at: [] netdev_xmit_lock_key+0x10/0x3c0 [ 621.590339][ C2] ... acquired at: [ 621.590340][ C2] __lock_acquire+0x449/0x7e0 [ 621.590342][ C2] lock_acquire.part.0+0xb6/0x240 [ 621.590344][ C2] _raw_spin_lock+0x33/0x40 [ 621.590347][ C2] virtnet_poll_tx+0x1da/0x6f0 [ 621.590349][ C2] poll_napi+0xf8/0x250 [ 621.590354][ C2] netpoll_poll_dev+0x264/0x2f0 [ 621.590356][ C2] __netpoll_send_skb+0x6ba/0x8a0 [ 621.590358][ C2] netpoll_send_skb+0x2a/0x90 [ 621.590361][ C2] send_ext_msg_udp+0x422/0x570 [netconsole] [ 621.590370][ C2] write_ext_msg+0x1c6/0x220 [netconsole] [ 621.590374][ C2] console_emit_next_record+0x20a/0x430 [ 621.590377][ C2] console_flush_all+0x3b4/0x620 [ 621.590380][ C2] console_unlock+0xba/0x190 [ 621.590382][ C2] vprintk_emit+0x290/0x2d0 [ 621.590385][ C2] devkmsg_emit.constprop.0+0xab/0xe0 [ 621.590388][ C2] devkmsg_write+0x193/0x300 [ 621.590391][ C2] vfs_write+0xaae/0x12c0 [ 621.590395][ C2] ksys_write+0xf7/0x1d0 [ 621.590397][ C2] do_syscall_64+0xc1/0x370 [ 621.590400][ C2] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 621.590402][ C2] [ 621.590403][ C2] -> (target_list_lock){....}-{3:3} { [ 621.590408][ C2] INITIAL USE at: [ 621.590410][ C2] __lock_acquire+0x20b/0x7e0 [ 621.590415][ C2] lock_acquire.part.0+0xb6/0x240 [ 621.590418][ C2] _raw_spin_lock_irqsave+0x42/0x60 [ 621.590422][ C2] netconsole_netdev_event+0x78/0x63e [netconsole] [ 621.590428][ C2] notifier_call_chain+0xcc/0x150 [ 621.590433][ C2] netif_change_name+0x45a/0x920 [ 621.590435][ C2] do_setlink.constprop.0+0x1ca6/0x2640 [ 621.590438][ C2] rtnl_setlink+0x2ad/0x590 [ 621.590441][ C2] rtnetlink_rcv_msg+0x709/0xc00 [ 621.590443][ C2] netlink_rcv_skb+0x121/0x340 [ 621.590446][ C2] netlink_unicast+0x4aa/0x780 [ 621.590448][ C2] netlink_sendmsg+0x71d/0xbe0 [ 621.590451][ C2] __sys_sendto+0x24b/0x380 [ 621.590454][ C2] __x64_sys_sendto+0xe0/0x1b0 [ 621.590457][ C2] do_syscall_64+0xc1/0x370 [ 621.590459][ C2] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 621.590461][ C2] } [ 621.590462][ C2] ... key at: [] target_list_lock+0x18/0x60 [netconsole] [ 621.590467][ C2] ... acquired at: [ 621.590468][ C2] __lock_acquire+0x449/0x7e0 [ 621.590470][ C2] lock_acquire.part.0+0xb6/0x240 [ 621.590472][ C2] _raw_spin_lock_irqsave+0x42/0x60 [ 621.590475][ C2] write_ext_msg+0x8e/0x220 [netconsole] [ 621.590479][ C2] console_emit_next_record+0x20a/0x430 [ 621.590482][ C2] console_flush_all+0x3b4/0x620 [ 621.590484][ C2] console_unlock+0xba/0x190 [ 621.590487][ C2] vprintk_emit+0x290/0x2d0 [ 621.590489][ C2] devkmsg_emit.constprop.0+0xab/0xe0 [ 621.590492][ C2] devkmsg_write+0x193/0x300 [ 621.590495][ C2] vfs_write+0xaae/0x12c0 [ 621.590497][ C2] ksys_write+0xf7/0x1d0 [ 621.590499][ C2] do_syscall_64+0xc1/0x370 [ 621.590501][ C2] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 621.590503][ C2] [ 621.590504][ C2] -> (console_owner){-...}-{0:0} { [ 621.590507][ C2] IN-HARDIRQ-W at: [ 621.590509][ C2] __lock_acquire+0x20b/0x7e0 [ 621.590512][ C2] lock_acquire.part.0+0xb6/0x240 [ 621.590517][ C2] console_lock_spinning_enable+0x99/0xb0 [ 621.590520][ C2] console_emit_next_record+0x1b2/0x430 [ 621.590523][ C2] console_flush_all+0x3b4/0x620 [ 621.590527][ C2] console_unlock+0xba/0x190 [ 621.590531][ C2] wake_up_klogd_work_func+0x5b/0x80 [ 621.590533][ C2] irq_work_single+0x108/0x210 [ 621.590536][ C2] irq_work_run_list+0x6a/0x90 [ 621.590539][ C2] update_process_times+0x136/0x1a0 [ 621.590546][ C2] tick_nohz_handler+0x319/0x4e0 [ 621.590550][ C2] __run_hrtimer+0x158/0x370 [ 621.590553][ C2] __hrtimer_run_queues+0x194/0x260 [ 621.590557][ C2] hrtimer_interrupt+0x339/0x850 [ 621.590560][ C2] __sysvec_apic_timer_interrupt+0xc6/0x150 [ 621.590565][ C2] sysvec_apic_timer_interrupt+0xa3/0xc0 [ 621.590569][ C2] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 621.590572][ C2] _raw_spin_unlock_irqrestore+0x41/0x70 [ 621.590575][ C2] uart_start+0x1c6/0x5e0 [ 621.590581][ C2] __receive_buf+0x672/0xcd0 [ 621.590584][ C2] n_tty_receive_buf_common+0x15d/0xb00 [ 621.590587][ C2] tty_port_default_receive_buf+0x65/0xa0 [ 621.590590][ C2] flush_to_ldisc+0x1be/0x700 [ 621.590593][ C2] process_one_work+0xe35/0x1650 [ 621.590596][ C2] worker_thread+0x591/0xcf0 [ 621.590599][ C2] kthread+0x37b/0x5f0 [ 621.590603][ C2] ret_from_fork+0x240/0x320 [ 621.590607][ C2] ret_from_fork_asm+0x11/0x20 [ 621.590611][ C2] INITIAL USE at: [ 621.590613][ C2] } [ 621.590613][ C2] ... key at: [] console_owner_dep_map+0x0/0x60 [ 621.590627][ C2] ... acquired at: [ 621.590628][ C2] mark_lock+0x16c/0x2f0 [ 621.590630][ C2] mark_usage+0x11d/0x140 [ 621.590632][ C2] __lock_acquire+0x20b/0x7e0 [ 621.590634][ C2] lock_acquire.part.0+0xb6/0x240 [ 621.590637][ C2] console_lock_spinning_enable+0x99/0xb0 [ 621.590640][ C2] console_emit_next_record+0x1b2/0x430 [ 621.590642][ C2] console_flush_all+0x3b4/0x620 [ 621.590645][ C2] console_unlock+0xba/0x190 [ 621.590648][ C2] wake_up_klogd_work_func+0x5b/0x80 [ 621.590650][ C2] irq_work_single+0x108/0x210 [ 621.590653][ C2] irq_work_run_list+0x6a/0x90 [ 621.590656][ C2] update_process_times+0x136/0x1a0 [ 621.590659][ C2] tick_nohz_handler+0x319/0x4e0 [ 621.590663][ C2] __run_hrtimer+0x158/0x370 [ 621.590666][ C2] __hrtimer_run_queues+0x194/0x260 [ 621.590669][ C2] hrtimer_interrupt+0x339/0x850 [ 621.590672][ C2] __sysvec_apic_timer_interrupt+0xc6/0x150 [ 621.590675][ C2] sysvec_apic_timer_interrupt+0xa3/0xc0 [ 621.590678][ C2] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 621.590680][ C2] _raw_spin_unlock_irqrestore+0x41/0x70 [ 621.590683][ C2] uart_start+0x1c6/0x5e0 [ 621.590686][ C2] __receive_buf+0x672/0xcd0 [ 621.590688][ C2] n_tty_receive_buf_common+0x15d/0xb00 [ 621.590691][ C2] tty_port_default_receive_buf+0x65/0xa0 [ 621.590694][ C2] flush_to_ldisc+0x1be/0x700 [ 621.590697][ C2] process_one_work+0xe35/0x1650 [ 621.590700][ C2] worker_thread+0x591/0xcf0 [ 621.590703][ C2] kthread+0x37b/0x5f0 [ 621.590706][ C2] ret_from_fork+0x240/0x320 [ 621.590709][ C2] ret_from_fork_asm+0x11/0x20 [ 621.590711][ C2] [ 621.590712][ C2] [ 621.590712][ C2] stack backtrace: [ 621.590716][ C2] CPU: 2 UID: 0 PID: 69 Comm: kworker/u19:1 Not tainted 6.17.0-rc3-virtme #1 PREEMPT(full) [ 621.590720][ C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 621.590723][ C2] Workqueue: events_unbound flush_to_ldisc [ 621.590729][ C2] Call Trace: [ 621.590731][ C2] [ 621.590736][ C2] dump_stack_lvl+0x82/0xc0 [ 621.590742][ C2] print_irq_inversion_bug.part.0+0x206/0x260 [ 621.590747][ C2] mark_lock_irq+0x248/0x400 [ 621.590753][ C2] mark_lock+0x16c/0x2f0 [ 621.590757][ C2] mark_usage+0x11d/0x140 [ 621.590760][ C2] __lock_acquire+0x20b/0x7e0 [ 621.590764][ C2] lock_acquire.part.0+0xb6/0x240 [ 621.590767][ C2] ? console_lock_spinning_enable+0x7d/0xb0 [ 621.590771][ C2] ? rcu_is_watching+0x12/0xb0 [ 621.590778][ C2] ? lock_acquire+0x104/0x160 [ 621.590780][ C2] ? console_lock_spinning_enable+0x7d/0xb0 [ 621.590784][ C2] console_lock_spinning_enable+0x99/0xb0 [ 621.590787][ C2] ? console_lock_spinning_enable+0x7d/0xb0 [ 621.590790][ C2] console_emit_next_record+0x1b2/0x430 [ 621.590794][ C2] ? devkmsg_read+0x460/0x460 [ 621.590798][ C2] ? rcu_is_watching+0x12/0xb0 [ 621.590803][ C2] console_flush_all+0x3b4/0x620 [ 621.590808][ C2] ? console_emit_next_record+0x430/0x430 [ 621.590811][ C2] ? __lock_acquire+0x449/0x7e0 [ 621.590816][ C2] console_unlock+0xba/0x190 [ 621.590819][ C2] ? console_flush_all+0x620/0x620 [ 621.590822][ C2] ? rcu_is_watching+0x12/0xb0 [ 621.590826][ C2] ? irq_work_single+0x108/0x210 [ 621.590829][ C2] ? irq_work_single+0x108/0x210 [ 621.590833][ C2] wake_up_klogd_work_func+0x5b/0x80 [ 621.590837][ C2] irq_work_single+0x108/0x210 [ 621.590841][ C2] irq_work_run_list+0x6a/0x90 [ 621.590844][ C2] ? irq_work_tick+0x9b/0x140 [ 621.590847][ C2] update_process_times+0x136/0x1a0 [ 621.590851][ C2] tick_nohz_handler+0x319/0x4e0 [ 621.590854][ C2] ? rcu_is_watching+0x12/0xb0 [ 621.590858][ C2] __run_hrtimer+0x158/0x370 [ 621.590861][ C2] ? tick_do_update_jiffies64.part.0+0x280/0x280 [ 621.590866][ C2] __hrtimer_run_queues+0x194/0x260 [ 621.590870][ C2] ? hrtimer_interrupt+0x12a/0x850 [ 621.590874][ C2] ? __run_hrtimer+0x370/0x370 [ 621.590877][ C2] ? kvm_clock_get_cycles+0x18/0x30 [ 621.590885][ C2] hrtimer_interrupt+0x339/0x850 [ 621.590889][ C2] ? lockdep_softirqs_on+0xbb/0x130 [ 621.590894][ C2] __sysvec_apic_timer_interrupt+0xc6/0x150 [ 621.590898][ C2] sysvec_apic_timer_interrupt+0xa3/0xc0 [ 621.590902][ C2] [ 621.590903][ C2] [ 621.590904][ C2] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 621.590907][ C2] RIP: 0010:_raw_spin_unlock_irqrestore+0x41/0x70 [ 621.590911][ C2] Code: 74 24 10 e8 61 3b f9 fd 48 89 ef e8 89 8a f9 fd 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 4a c0 ed fd 65 8b 05 a3 fe 02 02 85 c0 74 0a 5b 5d c3 e8 e7 3d [ 621.590914][ C2] RSP: 0018:ffffc900004a7a68 EFLAGS: 00000206 [ 621.590918][ C2] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 0000000000000080 [ 621.590920][ C2] RDX: 0000000000000000 RSI: ffffffff8abeb534 RDI: 0000000000000001 [ 621.590922][ C2] RBP: ffffffff8d46a7e0 R08: 0000000000000001 R09: 0000000000000001 [ 621.590924][ C2] R10: ffffffff8ba1d317 R11: ffff8880060e8970 R12: ffffffff8d46a8e8 [ 621.590927][ C2] R13: 00000000ffffffff R14: 0000000000000282 R15: ffffffff8d46a920 [ 621.590937][ C2] uart_start+0x1c6/0x5e0 [ 621.590944][ C2] __receive_buf+0x672/0xcd0 [ 621.590950][ C2] n_tty_receive_buf_common+0x15d/0xb00 [ 621.590956][ C2] tty_port_default_receive_buf+0x65/0xa0 [ 621.590962][ C2] flush_to_ldisc+0x1be/0x700 [ 621.590970][ C2] ? rcu_is_watching+0x12/0xb0 [ 621.590976][ C2] process_one_work+0xe35/0x1650 [ 621.590983][ C2] ? pwq_dec_nr_in_flight+0x550/0x550 [ 621.590988][ C2] ? assign_work+0x168/0x240 [ 621.590993][ C2] worker_thread+0x591/0xcf0 [ 621.590999][ C2] ? rescuer_thread+0xd10/0xd10 [ 621.591003][ C2] kthread+0x37b/0x5f0 [ 621.591006][ C2] ? kthread_is_per_cpu+0xc0/0xc0 [ 621.591009][ C2] ? ret_from_fork+0x1b/0x320 [ 621.591012][ C2] ? __lock_release+0x5d/0x170 [ 621.591015][ C2] ? rcu_is_watching+0x12/0xb0 [ 621.591019][ C2] ? kthread_is_per_cpu+0xc0/0xc0 [ 621.591022][ C2] ret_from_fork+0x240/0x320 [ 621.591025][ C2] ? kthread_is_per_cpu+0xc0/0xc0 [ 621.591029][ C2] ret_from_fork_asm+0x11/0x20 [ 621.591035][ C2]