[[0;32m OK [0m] Reached target Login Prompts.
[[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: [ 23.610291][ T8437] bash (8437) used greatest stack depth: 10360 bytes left
Warning: Permanently added '10.128.0.204' (ECDSA) to the list of known hosts.
2020/11/05 22:22:33 fuzzer started
2020/11/05 22:22:33 dialing manager at 10.128.0.105:38935
2020/11/05 22:22:33 syscalls: 3448
2020/11/05 22:22:33 code coverage: enabled
2020/11/05 22:22:33 comparison tracing: enabled
2020/11/05 22:22:33 extra coverage: enabled
2020/11/05 22:22:33 setuid sandbox: enabled
2020/11/05 22:22:33 namespace sandbox: enabled
2020/11/05 22:22:33 Android sandbox: /sys/fs/selinux/policy does not exist
2020/11/05 22:22:33 fault injection: enabled
2020/11/05 22:22:33 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/11/05 22:22:33 net packet injection: enabled
2020/11/05 22:22:33 net device setup: enabled
2020/11/05 22:22:33 concurrency sanitizer: enabled
2020/11/05 22:22:33 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/11/05 22:22:33 USB emulation: enabled
2020/11/05 22:22:33 hci packet injection: enabled
2020/11/05 22:22:33 wifi device emulation: enabled
2020/11/05 22:22:36 suppressing KCSAN reports in functions: 'expire_timers' 'vfs_readlink' '__xa_clear_mark' 'alloc_pid' 'do_nanosleep' 'filemap_map_pages' '__ext4_new_inode' 'dd_has_work' 'ext4_writepages' '__mod_timer' 'generic_write_end' 'ext4_free_inodes_count' 'do_signal_stop' '__io_cqring_fill_event' 'tick_nohz_next_event' 'snd_rawmidi_poll' 'ext4_free_inode' 'blk_mq_sched_dispatch_requests' 'blk_mq_rq_ctx_init' 'pcpu_alloc' 'generic_file_buffered_read' 'blk_mq_dispatch_rq_list' 'do_select' 'futex_wait_queue_me' 'ext4_mb_good_group' 'find_get_pages_range_tag' 'complete_signal' '__delayacct_blkio_end' 'ext4_mark_iloc_dirty' '__ext4_update_other_inode_time' 'n_tty_receive_buf_common' 'ext4_mb_regular_allocator' 'kauditd_thread' 'wbt_issue'
[ 42.981397][ C0] ==================================================================
[ 42.989617][ C0] BUG: KCSAN: data-race in tick_nohz_stop_tick / tick_sched_timer
[ 42.997402][ C0]
[ 42.999719][ C0] write to 0xffffffff86fc2c50 of 4 bytes by task 0 on cpu 1:
[ 43.007063][ C0] tick_nohz_stop_tick+0x99/0x410
[ 43.012071][ C0] tick_nohz_idle_stop_tick+0x148/0x2e0
[ 43.017585][ C0] do_idle+0x176/0x230
[ 43.021623][ C0] cpu_startup_entry+0x15/0x20
[ 43.026452][ C0] secondary_startup_64_no_verify+0xb0/0xbb
[ 43.032313][ C0]
[ 43.034615][ C0] read to 0xffffffff86fc2c50 of 4 bytes by interrupt on cpu 0:
[ 43.042124][ C0] tick_sched_timer+0x35/0x210
[ 43.046857][ C0] __run_hrtimer+0x133/0x420
[ 43.051443][ C0] hrtimer_interrupt+0x36e/0xa10
[ 43.056368][ C0] __sysvec_apic_timer_interrupt+0x6f/0x200
[ 43.062237][ C0] asm_call_irq_on_stack+0xf/0x20
[ 43.067231][ C0] sysvec_apic_timer_interrupt+0x52/0x90
[ 43.072861][ C0] asm_sysvec_apic_timer_interrupt+0x12/0x20
[ 43.078840][ C0] acpi_idle_enter+0x25b/0x2e0
[ 43.083592][ C0] cpuidle_enter_state+0x2bd/0x750
[ 43.088676][ C0] cpuidle_enter+0x3c/0x60
[ 43.093063][ C0] do_idle+0x193/0x230
[ 43.097117][ C0] cpu_startup_entry+0x15/0x20
[ 43.101851][ C0] rest_init+0xd7/0xe0
[ 43.105907][ C0] arch_call_rest_init+0xa/0xb
[ 43.110640][ C0] start_kernel+0x5a0/0x625
[ 43.115113][ C0] secondary_startup_64_no_verify+0xb0/0xbb
[ 43.120970][ C0]
[ 43.123270][ C0] Reported by Kernel Concurrency Sanitizer on:
[ 43.129396][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.10.0-rc2-syzkaller #0
[ 43.137363][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 43.147388][ C0] ==================================================================
[ 43.155436][ C0] Kernel panic - not syncing: panic_on_warn set ...
[ 43.162008][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.10.0-rc2-syzkaller #0
[ 43.169974][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 43.179997][ C0] Call Trace:
[ 43.183252][ C0]
[ 43.186080][ C0] dump_stack+0x116/0x15d
[ 43.190382][ C0] panic+0x1e7/0x5fa
[ 43.194251][ C0] ? vprintk_emit+0x2f2/0x370
[ 43.198899][ C0] kcsan_report+0x67b/0x680
[ 43.203393][ C0] ? kcsan_setup_watchpoint+0x46a/0x4d0
[ 43.208925][ C0] ? tick_sched_timer+0x35/0x210
[ 43.213835][ C0] ? __run_hrtimer+0x133/0x420
[ 43.218581][ C0] ? hrtimer_interrupt+0x36e/0xa10
[ 43.223664][ C0] ? __sysvec_apic_timer_interrupt+0x6f/0x200
[ 43.229720][ C0] ? asm_call_irq_on_stack+0xf/0x20
[ 43.234892][ C0] ? sysvec_apic_timer_interrupt+0x52/0x90
[ 43.240668][ C0] ? asm_sysvec_apic_timer_interrupt+0x12/0x20
[ 43.246810][ C0] ? acpi_idle_enter+0x25b/0x2e0
[ 43.251721][ C0] ? cpuidle_enter_state+0x2bd/0x750
[ 43.256992][ C0] ? cpuidle_enter+0x3c/0x60
[ 43.261553][ C0] ? do_idle+0x193/0x230
[ 43.265782][ C0] ? cpu_startup_entry+0x15/0x20
[ 43.270699][ C0] ? rest_init+0xd7/0xe0
[ 43.274924][ C0] ? arch_call_rest_init+0xa/0xb
[ 43.279866][ C0] ? start_kernel+0x5a0/0x625
[ 43.284712][ C0] ? secondary_startup_64_no_verify+0xb0/0xbb
[ 43.290785][ C0] ? enqueue_entity+0x25a/0x480
[ 43.295612][ C0] kcsan_setup_watchpoint+0x46a/0x4d0
[ 43.300957][ C0] tick_sched_timer+0x35/0x210
[ 43.305707][ C0] ? tick_setup_sched_timer+0x260/0x260
[ 43.311237][ C0] __run_hrtimer+0x133/0x420
[ 43.315799][ C0] hrtimer_interrupt+0x36e/0xa10
[ 43.320707][ C0] ? irqtime_account_irq+0x2a/0x90
[ 43.325808][ C0] __sysvec_apic_timer_interrupt+0x6f/0x200
[ 43.331689][ C0] asm_call_irq_on_stack+0xf/0x20
[ 43.336698][ C0]
[ 43.339639][ C0] sysvec_apic_timer_interrupt+0x52/0x90
[ 43.345258][ C0] asm_sysvec_apic_timer_interrupt+0x12/0x20
[ 43.351231][ C0] RIP: 0010:acpi_idle_enter+0x25b/0x2e0
[ 43.356746][ C0] Code: 48 8b 1b 48 89 de 48 83 e6 08 31 ff e8 5e 37 90 fe 48 83 e3 08 75 63 e9 0c 00 00 00 e8 9e 32 90 fe 0f 00 2d 61 db 2a 03 fb f4 eb 59 49 8d 7c 24 04 e8 e8 5b a0 fe 41 8b 54 24 04 ec 48 c7 c7
[ 43.376337][ C0] RSP: 0018:ffffffff86a03da8 EFLAGS: 00000246
[ 43.382376][ C0] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000000000008b
[ 43.390406][ C0] RDX: ffffffff86a30780 RSI: 0000000000000000 RDI: 0000000000000000
[ 43.398349][ C0] RBP: 0000000000000001 R08: ffffffff82b444f2 R09: ffffffff82b444b3
[ 43.406318][ C0] R10: 0000000000000002 R11: ffffffff86a30780 R12: ffff88810124f064
[ 43.414268][ C0] R13: 0000000000000001 R14: 0000000000000001 R15: ffff88813bc00000
[ 43.422222][ C0] ? acpi_idle_enter+0x203/0x2e0
[ 43.427132][ C0] ? acpi_idle_enter+0x242/0x2e0
[ 43.432045][ C0] ? acpi_idle_enter+0x242/0x2e0
[ 43.436956][ C0] cpuidle_enter_state+0x2bd/0x750
[ 43.442042][ C0] cpuidle_enter+0x3c/0x60
[ 43.446437][ C0] do_idle+0x193/0x230
[ 43.450477][ C0] cpu_startup_entry+0x15/0x20
[ 43.455212][ C0] rest_init+0xd7/0xe0
[ 43.459254][ C0] ? time_init+0xc/0xc
[ 43.463314][ C0] arch_call_rest_init+0xa/0xb
[ 43.468049][ C0] start_kernel+0x5a0/0x625
[ 43.472526][ C0] secondary_startup_64_no_verify+0xb0/0xbb
[ 43.479482][ C0] Kernel Offset: disabled
[ 43.483902][ C0] Rebooting in 86400 seconds..