Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.80' (ECDSA) to the list of known hosts. 2020/06/15 09:11:34 fuzzer started 2020/06/15 09:11:34 dialing manager at 10.128.0.105:32959 2020/06/15 09:11:39 syscalls: 3085 2020/06/15 09:11:39 code coverage: enabled 2020/06/15 09:11:39 comparison tracing: enabled 2020/06/15 09:11:39 extra coverage: enabled 2020/06/15 09:11:39 setuid sandbox: enabled 2020/06/15 09:11:39 namespace sandbox: enabled 2020/06/15 09:11:39 Android sandbox: /sys/fs/selinux/policy does not exist 2020/06/15 09:11:39 fault injection: enabled 2020/06/15 09:11:39 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/06/15 09:11:39 net packet injection: enabled 2020/06/15 09:11:39 net device setup: enabled 2020/06/15 09:11:39 concurrency sanitizer: enabled 2020/06/15 09:11:39 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/06/15 09:11:39 USB emulation: enabled syzkaller login: [ 59.300461][ T8924] KCSAN: could not find function: '_find_next_bit' 2020/06/15 09:11:43 suppressing KCSAN reports in functions: 'file_update_time' 'ktime_get_real_seconds' 'generic_fillattr' 'xas_clear_mark' 'decrypt_packet' 'blk_mq_dispatch_rq_list' 'futex_wait_queue_me' 'mod_timer' 'ep_poll' 'run_timer_softirq' '__mpage_writepage' 'blk_mq_sched_dispatch_requests' 'page_counter_charge' 'tick_nohz_next_event' 'do_nanosleep' 'tick_nohz_idle_stop_tick' 'alloc_pid' 'complete_signal' 'copy_process' 'generic_write_end' 'wbt_done' '__ext4_new_inode' 'generic_file_read_iter' 'pcpu_alloc' 'kauditd_thread' 'blk_mq_get_request' '_find_next_bit' 'find_get_pages_range_tag' [ 81.001766][ C0] ================================================================== [ 81.015288][ C0] BUG: KCSAN: data-race in tick_sched_do_timer / tick_sched_do_timer [ 81.023336][ C0] [ 81.025647][ C0] write to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 1: [ 81.033309][ C0] tick_sched_do_timer+0xb4/0xd0 [ 81.038246][ C0] tick_sched_timer+0x3f/0xd0 [ 81.042904][ C0] __hrtimer_run_queues+0x271/0x600 [ 81.048080][ C0] hrtimer_interrupt+0x226/0x490 [ 81.053012][ C0] smp_apic_timer_interrupt+0xd8/0x270 [ 81.058465][ C0] apic_timer_interrupt+0xf/0x20 [ 81.063409][ C0] tick_nohz_idle_exit+0x128/0x1d0 [ 81.068704][ C0] do_idle+0xac/0x290 [ 81.072794][ C0] cpu_startup_entry+0x14/0x20 [ 81.077540][ C0] start_secondary+0x169/0x1b0 [ 81.082297][ C0] secondary_startup_64+0xa4/0xb0 [ 81.087308][ C0] [ 81.089628][ C0] read to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 0: [ 81.097155][ C0] tick_sched_do_timer+0x2e/0xd0 [ 81.102091][ C0] tick_sched_timer+0x3f/0xd0 [ 81.106776][ C0] __hrtimer_run_queues+0x271/0x600 [ 81.111954][ C0] hrtimer_interrupt+0x226/0x490 [ 81.116992][ C0] smp_apic_timer_interrupt+0xd8/0x270 [ 81.122434][ C0] apic_timer_interrupt+0xf/0x20 [ 81.127352][ C0] _raw_spin_unlock_irqrestore+0x4d/0x80 [ 81.132970][ C0] __wake_up_common_lock+0x85/0xb0 [ 81.138063][ C0] sock_def_readable+0x9d/0x130 [ 81.142919][ C0] tcp_data_ready+0x76/0xc0 [ 81.147406][ C0] tcp_rcv_established+0xcb8/0xee0 [ 81.152516][ C0] tcp_v4_do_rcv+0x396/0x4f0 [ 81.157084][ C0] tcp_v4_rcv+0x1c55/0x1e10 [ 81.161563][ C0] ip_protocol_deliver_rcu+0x4b/0x410 [ 81.166924][ C0] ip_local_deliver_finish+0xf3/0x120 [ 81.172374][ C0] ip_local_deliver+0x135/0x220 [ 81.177206][ C0] ip_sublist_rcv_finish+0xf0/0x140 [ 81.182402][ C0] ip_sublist_rcv+0x3f8/0x530 [ 81.187075][ C0] ip_list_rcv+0x2f3/0x321 [ 81.191481][ C0] __netif_receive_skb_list_core+0x368/0x5c0 [ 81.197455][ C0] netif_receive_skb_list_internal+0x5c7/0x810 [ 81.203711][ C0] gro_normal_list.part.0+0x37/0xa0 [ 81.208916][ C0] gro_normal_one+0x14c/0x160 [ 81.213594][ C0] napi_gro_receive+0x27d/0x2f0 [ 81.218600][ C0] receive_buf+0x24c/0x3420 [ 81.223085][ C0] virtnet_poll+0x343/0x790 [ 81.227759][ C0] net_rx_action+0x3ad/0xac0 [ 81.232355][ C0] __do_softirq+0x118/0x34a [ 81.237025][ C0] run_ksoftirqd+0x41/0x60 [ 81.241430][ C0] smpboot_thread_fn+0x374/0x4a0 [ 81.246350][ C0] kthread+0x203/0x230 [ 81.250410][ C0] ret_from_fork+0x1f/0x30 [ 81.254827][ C0] [ 81.257142][ C0] Reported by Kernel Concurrency Sanitizer on: [ 81.263280][ C0] CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 5.7.0-rc1-syzkaller #0 [ 81.271377][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 81.281519][ C0] ================================================================== [ 81.289563][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 81.296133][ C0] CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 5.7.0-rc1-syzkaller #0 [ 81.304172][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 81.314555][ C0] Call Trace: [ 81.317836][ C0] [ 81.320695][ C0] dump_stack+0x11d/0x187 [ 81.325020][ C0] panic+0x210/0x640 [ 81.328895][ C0] ? vprintk_func+0x89/0x13a [ 81.333472][ C0] kcsan_report.cold+0xc/0x1a [ 81.338287][ C0] kcsan_setup_watchpoint+0x3fb/0x440 [ 81.343682][ C0] tick_sched_do_timer+0x2e/0xd0 [ 81.348607][ C0] tick_sched_timer+0x3f/0xd0 [ 81.353295][ C0] __hrtimer_run_queues+0x271/0x600 [ 81.358589][ C0] ? tick_sched_do_timer+0xd0/0xd0 [ 81.363692][ C0] hrtimer_interrupt+0x226/0x490 [ 81.368636][ C0] ? kvm_clock_read+0x14/0x30 [ 81.373301][ C0] smp_apic_timer_interrupt+0xd8/0x270 [ 81.378739][ C0] apic_timer_interrupt+0xf/0x20 [ 81.383648][ C0] [ 81.386585][ C0] RIP: 0010:_raw_spin_unlock_irqrestore+0x4d/0x80 [ 81.393000][ C0] Code: 5b 01 00 74 46 48 89 df e8 70 03 6d fb 66 90 48 c7 c7 c0 c9 25 87 e8 92 d8 8a fb 48 83 3d 0a db 5b 01 00 74 28 48 89 ef 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 b4 7b 6a fb 65 8b 05 35 9d 37 7a [ 81.412588][ C0] RSP: 0018:ffffc90000cb34d0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 [ 81.420984][ C0] RAX: ffff88812c0295a0 RBX: ffff888124e2e3c0 RCX: ffffffff88af0438 [ 81.428936][ C0] RDX: 0000000000000030 RSI: 0000000000000282 RDI: 0000000000000282 [ 81.437491][ C0] RBP: 0000000000000282 R08: 0000000000000000 R09: 0000ffff8725c9c0 [ 81.445440][ C0] R10: 000088812b783378 R11: 0000ffff8725c9c7 R12: 0000000000000001 [ 81.453390][ C0] R13: 00000000000000c3 R14: 0000000000000001 R15: 0000000000000001 [ 81.461382][ C0] __wake_up_common_lock+0x85/0xb0 [ 81.466844][ C0] sock_def_readable+0x9d/0x130 [ 81.471692][ C0] tcp_data_ready+0x76/0xc0 [ 81.476189][ C0] tcp_rcv_established+0xcb8/0xee0 [ 81.481283][ C0] tcp_v4_do_rcv+0x396/0x4f0 [ 81.485857][ C0] tcp_v4_rcv+0x1c55/0x1e10 [ 81.490361][ C0] ip_protocol_deliver_rcu+0x4b/0x410 [ 81.495726][ C0] ip_local_deliver_finish+0xf3/0x120 [ 81.501076][ C0] ip_local_deliver+0x135/0x220 [ 81.505906][ C0] ? ip_protocol_deliver_rcu+0x410/0x410 [ 81.511516][ C0] ip_sublist_rcv_finish+0xf0/0x140 [ 81.516693][ C0] ip_sublist_rcv+0x3f8/0x530 [ 81.521348][ C0] ? ip_sublist_rcv+0x530/0x530 [ 81.526176][ C0] ip_list_rcv+0x2f3/0x321 [ 81.530568][ C0] ? ip_rcv+0x1b0/0x1b0 [ 81.534702][ C0] __netif_receive_skb_list_core+0x368/0x5c0 [ 81.540661][ C0] ? ktime_get_with_offset+0x1e6/0x230 [ 81.546113][ C0] netif_receive_skb_list_internal+0x5c7/0x810 [ 81.552255][ C0] gro_normal_list.part.0+0x37/0xa0 [ 81.557451][ C0] ? __write_once_size+0x7c/0x100 [ 81.562457][ C0] gro_normal_one+0x14c/0x160 [ 81.567134][ C0] napi_gro_receive+0x27d/0x2f0 [ 81.571986][ C0] receive_buf+0x24c/0x3420 [ 81.576570][ C0] ? virtqueue_get_buf_ctx+0x4db/0x5c0 [ 81.582018][ C0] virtnet_poll+0x343/0x790 [ 81.586510][ C0] net_rx_action+0x3ad/0xac0 [ 81.591099][ C0] __do_softirq+0x118/0x34a [ 81.595582][ C0] ? takeover_tasklets+0x240/0x240 [ 81.600670][ C0] run_ksoftirqd+0x41/0x60 [ 81.605062][ C0] smpboot_thread_fn+0x374/0x4a0 [ 81.610001][ C0] ? constant_test_bit.constprop.0+0x30/0x30 [ 81.616145][ C0] kthread+0x203/0x230 [ 81.620199][ C0] ? kthread_unpark+0xd0/0xd0 [ 81.624883][ C0] ret_from_fork+0x1f/0x30 [ 81.630653][ C0] Kernel Offset: disabled [ 81.634970][ C0] Rebooting in 86400 seconds..