[[0;32m OK [0m] Started OpenBSD Secure Shell server.
[[0;32m OK [0m] Reached target Multi-User System.
[[0;32m OK [0m] Reached target Graphical Interface.
Starting Update UTMP about System Runlevel Changes...
[[0;32m OK [0m] Started Update UTMP about System Runlevel Changes.
Debian GNU/Linux 9 syzkaller ttyS0
syzkaller login: [ 28.149148][ T8686] sshd (8686) used greatest stack depth: 10360 bytes left
Warning: Permanently added '10.128.1.47' (ECDSA) to the list of known hosts.
2020/10/06 09:51:39 fuzzer started
2020/10/06 09:51:39 dialing manager at 10.128.0.105:38549
2020/10/06 09:51:40 syscalls: 3432
2020/10/06 09:51:40 code coverage: enabled
2020/10/06 09:51:40 comparison tracing: enabled
2020/10/06 09:51:40 extra coverage: enabled
2020/10/06 09:51:40 setuid sandbox: enabled
2020/10/06 09:51:40 namespace sandbox: enabled
2020/10/06 09:51:40 Android sandbox: /sys/fs/selinux/policy does not exist
2020/10/06 09:51:40 fault injection: enabled
2020/10/06 09:51:40 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/10/06 09:51:40 net packet injection: enabled
2020/10/06 09:51:40 net device setup: enabled
2020/10/06 09:51:40 concurrency sanitizer: enabled
2020/10/06 09:51:40 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/10/06 09:51:40 USB emulation: enabled
2020/10/06 09:51:40 hci packet injection: enabled
2020/10/06 09:51:40 wifi device emulation: enabled
2020/10/06 09:51:45 suppressing KCSAN reports in functions: 'blk_mq_rq_ctx_init' 'ext4_sync_file' 'exit_signals' 'futex_wait_queue_me' 'n_tty_receive_buf_common' 'find_get_pages_range_tag' 'ext4_mb_good_group' 'blk_mq_request_bypass_insert' 'generic_write_end' 'dd_has_work' '__mark_inode_dirty' '__writeback_single_inode' '__ext4_new_inode' 'wg_packet_decrypt_worker' '__blkdev_put' 'wbt_done' 'dput' 'snd_rawmidi_transmit' '__find_get_block' 'ext4_mb_regular_allocator' 'blk_mq_sched_dispatch_requests' '__xa_clear_mark' 'kvm_set_memslot' 'alloc_pid' 'ext4_free_inode' 'blk_mq_dispatch_rq_list' 'do_syslog' 'snd_rawmidi_poll' 'do_nanosleep' 'shmem_mknod' 'tick_sched_timer' '__add_to_page_cache_locked' 'do_sys_poll' 'pcpu_alloc' 'vti_tunnel_xmit' '__ext4_update_other_inode_time' 'mptcp_worker' 'snd_rawmidi_kernel_write1' '__delete_from_page_cache' 'do_signal_stop' 'ext4_writepages' 'ip_tunnel_xmit' 'io_sq_thread' 'shmem_add_to_page_cache' 'audit_log_start' 'xas_find_marked' '__io_cqring_fill_event' 'shmem_unlink' '__delayacct_blkio_end' 'do_exit' '__filemap_fdatawrite_range' '__percpu_counter_compare' 'ext4_free_inodes_count' 'kauditd_thread' 'generic_file_buffered_read' 'handle_irq_event' 'tick_nohz_next_event' 'ext4_mark_iloc_dirty' 'do_select' 'exit_mm' 'kcm_rfree' 'expire_timers' 'fsnotify'
[ 151.598511][ C0] ==================================================================
[ 151.606735][ C0] BUG: KCSAN: data-race in internal_add_timer / timer_clear_idle
[ 151.614456][ C0]
[ 151.616790][ C0] write to 0xffff88812c11cb25 of 1 bytes by task 0 on cpu 1:
[ 151.624840][ C0] timer_clear_idle+0x2e/0x40
[ 151.629490][ C0] __tick_nohz_idle_restart_tick+0x20/0x190
[ 151.635713][ C0] tick_nohz_idle_exit+0x13c/0x290
[ 151.640896][ C0] do_idle+0x280/0x2c0
[ 151.644947][ C0] cpu_startup_entry+0x15/0x20
[ 151.650375][ C0] secondary_startup_64+0xa4/0xb0
[ 151.655362][ C0]
[ 151.657663][ C0] read to 0xffff88812c11cb25 of 1 bytes by interrupt on cpu 0:
[ 151.665189][ C0] internal_add_timer+0x250/0x2e0
[ 151.670196][ C0] __mod_timer+0x76b/0xc90
[ 151.674594][ C0] mod_timer+0x1b/0x20
[ 151.678739][ C0] sk_reset_timer+0x1f/0xa0
[ 151.683399][ C0] tcp_send_delayed_ack+0x191/0x250
[ 151.688568][ C0] __tcp_ack_snd_check+0x313/0x530
[ 151.693656][ C0] tcp_rcv_established+0xb3e/0x1520
[ 151.698844][ C0] tcp_v4_do_rcv+0x25e/0x480
[ 151.703402][ C0] tcp_v4_rcv+0x219b/0x2420
[ 151.707877][ C0] ip_protocol_deliver_rcu+0x1f9/0x400
[ 151.713319][ C0] ip_local_deliver+0x1d6/0x2a0
[ 151.718677][ C0] ip_sublist_rcv+0x4d4/0x5a0
[ 151.723322][ C0] ip_list_rcv+0x262/0x290
[ 151.727723][ C0] __netif_receive_skb_list_core+0x34b/0x450
[ 151.733684][ C0] __netif_receive_skb_list+0x298/0x310
[ 151.739205][ C0] netif_receive_skb_list_internal+0xda/0x330
[ 151.745250][ C0] napi_complete_done+0x1a1/0x3c0
[ 151.750243][ C0] virtqueue_napi_complete+0x28/0x80
[ 151.755545][ C0] virtnet_poll+0x64f/0x780
[ 151.760052][ C0] napi_poll+0x178/0x4f0
[ 151.764263][ C0] net_rx_action+0x1ba/0x530
[ 151.768824][ C0] __do_softirq+0x198/0x360
[ 151.773297][ C0] asm_call_irq_on_stack+0xf/0x20
[ 151.778289][ C0] do_softirq_own_stack+0x5b/0x70
[ 151.783313][ C0] __irq_exit_rcu+0x115/0x120
[ 151.787971][ C0] common_interrupt+0x14e/0x1e0
[ 151.792796][ C0] asm_common_interrupt+0x1e/0x40
[ 151.797886][ C0] native_safe_halt+0xe/0x10
[ 151.802460][ C0] acpi_idle_do_entry+0x94/0x120
[ 151.807628][ C0] acpi_idle_enter+0x22e/0x260
[ 151.812374][ C0] cpuidle_enter_state+0x2ba/0x840
[ 151.817457][ C0] cpuidle_enter+0x3c/0x60
[ 151.821841][ C0] do_idle+0x1e7/0x2c0
[ 151.825876][ C0] cpu_startup_entry+0x15/0x20
[ 151.830608][ C0] rest_init+0xd8/0xe0
[ 151.834667][ C0] arch_call_rest_init+0xa/0xb
[ 151.839424][ C0] start_kernel+0x608/0x6d0
[ 151.843896][ C0] secondary_startup_64+0xa4/0xb0
[ 151.848904][ C0]
[ 151.851202][ C0] Reported by Kernel Concurrency Sanitizer on:
[ 151.857323][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.9.0-rc8-syzkaller #0
[ 151.865176][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 151.875197][ C0] ==================================================================
[ 151.883238][ C0] Kernel panic - not syncing: panic_on_warn set ...
[ 151.889797][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.9.0-rc8-syzkaller #0
[ 151.897679][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 151.907703][ C0] Call Trace:
[ 151.910954][ C0]
[ 151.913800][ C0] dump_stack+0x10f/0x19d
[ 151.918100][ C0] panic+0x207/0x64a
[ 151.922018][ C0] ? vprintk_emit+0x44a/0x4f0
[ 151.926673][ C0] kcsan_report+0x684/0x690
[ 151.931153][ C0] ? kcsan_setup_watchpoint+0x41e/0x4a0
[ 151.936671][ C0] ? internal_add_timer+0x250/0x2e0
[ 151.943332][ C0] ? __mod_timer+0x76b/0xc90
[ 151.947910][ C0] ? mod_timer+0x1b/0x20
[ 151.952137][ C0] ? sk_reset_timer+0x1f/0xa0
[ 151.956798][ C0] ? tcp_send_delayed_ack+0x191/0x250
[ 151.962142][ C0] ? __tcp_ack_snd_check+0x313/0x530
[ 151.967425][ C0] ? tcp_rcv_established+0xb3e/0x1520
[ 151.972782][ C0] ? tcp_v4_do_rcv+0x25e/0x480
[ 151.977528][ C0] ? tcp_v4_rcv+0x219b/0x2420
[ 151.982176][ C0] ? ip_protocol_deliver_rcu+0x1f9/0x400
[ 151.988570][ C0] ? ip_local_deliver+0x1d6/0x2a0
[ 151.993562][ C0] ? ip_sublist_rcv+0x4d4/0x5a0
[ 151.998380][ C0] ? ip_list_rcv+0x262/0x290
[ 152.002952][ C0] ? __netif_receive_skb_list_core+0x34b/0x450
[ 152.009072][ C0] ? __netif_receive_skb_list+0x298/0x310
[ 152.014778][ C0] ? netif_receive_skb_list_internal+0xda/0x330
[ 152.021004][ C0] ? napi_complete_done+0x1a1/0x3c0
[ 152.026194][ C0] ? virtqueue_napi_complete+0x28/0x80
[ 152.031634][ C0] ? virtnet_poll+0x64f/0x780
[ 152.036295][ C0] ? napi_poll+0x178/0x4f0
[ 152.040681][ C0] ? net_rx_action+0x1ba/0x530
[ 152.045429][ C0] ? __do_softirq+0x198/0x360
[ 152.050091][ C0] ? asm_call_irq_on_stack+0xf/0x20
[ 152.055257][ C0] ? do_softirq_own_stack+0x5b/0x70
[ 152.060429][ C0] ? __irq_exit_rcu+0x115/0x120
[ 152.065247][ C0] ? common_interrupt+0x14e/0x1e0
[ 152.070238][ C0] ? asm_common_interrupt+0x1e/0x40
[ 152.075401][ C0] ? native_safe_halt+0xe/0x10
[ 152.080131][ C0] ? acpi_idle_do_entry+0x94/0x120
[ 152.085223][ C0] ? acpi_idle_enter+0x22e/0x260
[ 152.090129][ C0] ? cpuidle_enter_state+0x2ba/0x840
[ 152.095397][ C0] ? cpuidle_enter+0x3c/0x60
[ 152.099956][ C0] ? do_idle+0x1e7/0x2c0
[ 152.104165][ C0] ? cpu_startup_entry+0x15/0x20
[ 152.109070][ C0] ? rest_init+0xd8/0xe0
[ 152.113297][ C0] ? arch_call_rest_init+0xa/0xb
[ 152.118218][ C0] ? start_kernel+0x608/0x6d0
[ 152.122864][ C0] ? secondary_startup_64+0xa4/0xb0
[ 152.128033][ C0] ? trace_event_raw_event_initcall_level+0x24/0x170
[ 152.134939][ C0] kcsan_setup_watchpoint+0x41e/0x4a0
[ 152.140281][ C0] internal_add_timer+0x250/0x2e0
[ 152.145385][ C0] __mod_timer+0x76b/0xc90
[ 152.149770][ C0] mod_timer+0x1b/0x20
[ 152.153815][ C0] sk_reset_timer+0x1f/0xa0
[ 152.158301][ C0] tcp_send_delayed_ack+0x191/0x250
[ 152.163469][ C0] __tcp_ack_snd_check+0x313/0x530
[ 152.168550][ C0] tcp_rcv_established+0xb3e/0x1520
[ 152.173717][ C0] tcp_v4_do_rcv+0x25e/0x480
[ 152.178465][ C0] tcp_v4_rcv+0x219b/0x2420
[ 152.182955][ C0] ip_protocol_deliver_rcu+0x1f9/0x400
[ 152.188385][ C0] ip_local_deliver+0x1d6/0x2a0
[ 152.193204][ C0] ? ip_local_deliver+0x2a0/0x2a0
[ 152.198198][ C0] ip_sublist_rcv+0x4d4/0x5a0
[ 152.202855][ C0] ? ip_rcv_core+0x600/0x600
[ 152.207426][ C0] ip_list_rcv+0x262/0x290
[ 152.211812][ C0] ? ip_rcv_finish+0x160/0x160
[ 152.216547][ C0] __netif_receive_skb_list_core+0x34b/0x450
[ 152.222511][ C0] __netif_receive_skb_list+0x298/0x310
[ 152.228038][ C0] netif_receive_skb_list_internal+0xda/0x330
[ 152.234086][ C0] napi_complete_done+0x1a1/0x3c0
[ 152.239081][ C0] virtqueue_napi_complete+0x28/0x80
[ 152.244346][ C0] virtnet_poll+0x64f/0x780
[ 152.248834][ C0] napi_poll+0x178/0x4f0
[ 152.253056][ C0] ? rcu_irq_exit+0x9/0x10
[ 152.257459][ C0] net_rx_action+0x1ba/0x530
[ 152.262019][ C0] __do_softirq+0x198/0x360
[ 152.266493][ C0] ? handle_edge_irq+0x52f/0x5f0
[ 152.271400][ C0] ? handle_fasteoi_nmi+0x290/0x290
[ 152.276569][ C0] asm_call_irq_on_stack+0xf/0x20
[ 152.281567][ C0]
[ 152.284476][ C0] do_softirq_own_stack+0x5b/0x70
[ 152.289484][ C0] __irq_exit_rcu+0x115/0x120
[ 152.294129][ C0] common_interrupt+0x14e/0x1e0
[ 152.298950][ C0] asm_common_interrupt+0x1e/0x40
[ 152.303942][ C0] RIP: 0010:native_safe_halt+0xe/0x10
[ 152.309282][ C0] Code: 44 fb 48 83 e5 08 75 0a e8 bf 90 44 fb e9 0d ff ff ff e8 b5 90 44 fb e9 77 ff ff ff e9 07 00 00 00 0f 00 2d d4 d7 5e 00 fb f4 90 e9 07 00 00 00 0f 00 2d c4 d7 5e 00 f4 c3 cc cc 41 56 53 65
[ 152.328856][ C0] RSP: 0018:ffffffff87c03d98 EFLAGS: 00000282
[ 152.334901][ C0] RAX: ffffffff87c320f0 RBX: 0000000000000000 RCX: 0000000000000626
[ 152.342857][ C0] RDX: 0000ffff87c67dc0 RSI: 0000000000000000 RDI: ffffffff87c67dc0
[ 152.350800][ C0] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000ffff87c67dc7
[ 152.358753][ C0] R10: 0000000000000002 R11: ffffffff87c316c0 R12: ffff888129e78004
[ 152.366704][ C0] R13: ffff88821b7acc64 R14: ffff88821b7acc64 R15: 0000000000000001
[ 152.374661][ C0] acpi_idle_do_entry+0x94/0x120
[ 152.379582][ C0] acpi_idle_enter+0x22e/0x260
[ 152.384327][ C0] ? rcu_dynticks_eqs_enter+0x9/0x40
[ 152.389598][ C0] cpuidle_enter_state+0x2ba/0x840
[ 152.394678][ C0] cpuidle_enter+0x3c/0x60
[ 152.399080][ C0] do_idle+0x1e7/0x2c0
[ 152.403118][ C0] cpu_startup_entry+0x15/0x20
[ 152.407849][ C0] rest_init+0xd8/0xe0
[ 152.411886][ C0] ? time_init+0xc/0xc
[ 152.415937][ C0] arch_call_rest_init+0xa/0xb
[ 152.420671][ C0] start_kernel+0x608/0x6d0
[ 152.425146][ C0] secondary_startup_64+0xa4/0xb0
[ 152.431205][ C0] Kernel Offset: disabled
[ 152.435523][ C0] Rebooting in 86400 seconds..