Warning: Permanently added '10.128.0.20' (ECDSA) to the list of known hosts. 2020/11/21 19:07:06 fuzzer started 2020/11/21 19:07:06 dialing manager at 10.128.0.105:42233 2020/11/21 19:07:07 syscalls: 3448 2020/11/21 19:07:07 code coverage: enabled 2020/11/21 19:07:07 comparison tracing: enabled 2020/11/21 19:07:07 extra coverage: enabled 2020/11/21 19:07:07 setuid sandbox: enabled 2020/11/21 19:07:07 namespace sandbox: enabled 2020/11/21 19:07:07 Android sandbox: /sys/fs/selinux/policy does not exist 2020/11/21 19:07:07 fault injection: enabled 2020/11/21 19:07:07 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/11/21 19:07:07 net packet injection: enabled 2020/11/21 19:07:07 net device setup: enabled 2020/11/21 19:07:07 concurrency sanitizer: enabled 2020/11/21 19:07:07 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/11/21 19:07:07 USB emulation: enabled 2020/11/21 19:07:07 hci packet injection: enabled 2020/11/21 19:07:07 wifi device emulation: enabled 2020/11/21 19:07:11 suppressing KCSAN reports in functions: 'caching_thread' 'audit_log_start' 'step_into' 'ext4_mb_find_by_goal' '__mod_timer' 'pcpu_alloc' '__add_to_page_cache_locked' 'snd_rawmidi_poll' 'tomoyo_domain_quota_is_ok' 'blk_mq_rq_ctx_init' 'do_signal_stop' 'wbt_issue' 'alloc_pid' 'snd_rawmidi_kernel_write1' '__filemap_fdatawrite_range' '__ext4_new_inode' 'exit_mm' 'n_tty_receive_buf_common' '__io_cqring_fill_event' 'do_epoll_ctl' 'exit_signals' '_prb_read_valid' 'wbt_done' '__delayacct_blkio_end' 'blk_mq_dispatch_rq_list' 'ext4_ext_try_to_merge_right' 'io_sq_thread' 'lru_add_drain_all' 'find_get_pages_range_tag' 'blk_mq_sched_dispatch_requests' 'ext4_mb_regular_allocator' 'complete_signal' 'shmem_mknod' 'dput' 'ext4_mb_good_group' '__mark_inode_dirty' 'kauditd_thread' 'kcm_rfree' 'shmem_unlink' 'generic_write_end' 'futex_wait_queue_me' 'ext4_free_inodes_count' 'do_select' 'get_signal' 'do_sys_poll' 'expire_timers' 'xas_clear_mark' 'ext4_free_inode' 'do_nanosleep' 'dd_has_work' '__xa_clear_mark' 'ext4_writepages' 'ext4_mark_iloc_dirty' syzkaller login: [ 54.217708][ T0] ================================================================== [ 54.226386][ T0] BUG: KCSAN: data-race in tick_nohz_next_event / tick_sched_timer [ 54.234258][ T0] [ 54.236560][ T0] write to 0xffffffff86fc1990 of 4 bytes by interrupt on cpu 1: [ 54.244177][ T0] tick_sched_timer+0x1f5/0x210 [ 54.249014][ T0] __run_hrtimer+0x133/0x420 [ 54.253574][ T0] hrtimer_interrupt+0x36e/0xa10 [ 54.258481][ T0] __sysvec_apic_timer_interrupt+0x6f/0x200 [ 54.264358][ T0] asm_call_irq_on_stack+0xf/0x20 [ 54.269354][ T0] sysvec_apic_timer_interrupt+0x52/0x90 [ 54.274958][ T0] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 54.280906][ T0] acpi_idle_enter+0x25b/0x2e0 [ 54.285642][ T0] cpuidle_enter_state+0x2bd/0x750 [ 54.290740][ T0] cpuidle_enter+0x3c/0x60 [ 54.295126][ T0] do_idle+0x193/0x230 [ 54.299164][ T0] cpu_startup_entry+0x15/0x20 [ 54.303914][ T0] secondary_startup_64_no_verify+0xb0/0xbb [ 54.309769][ T0] [ 54.312073][ T0] read to 0xffffffff86fc1990 of 4 bytes by task 0 on cpu 0: [ 54.319321][ T0] tick_nohz_next_event+0x217/0x300 [ 54.324922][ T0] tick_nohz_get_sleep_length+0x121/0x270 [ 54.330619][ T0] menu_select+0x2fa/0xf40 [ 54.335025][ T0] cpuidle_select+0x3d/0x50 [ 54.339504][ T0] do_idle+0x15f/0x230 [ 54.343546][ T0] cpu_startup_entry+0x15/0x20 [ 54.348280][ T0] rest_init+0xd7/0xe0 [ 54.352322][ T0] arch_call_rest_init+0xa/0xb [ 54.357057][ T0] start_kernel+0x5a0/0x625 [ 54.361550][ T0] secondary_startup_64_no_verify+0xb0/0xbb [ 54.367406][ T0] [ 54.369722][ T0] Reported by Kernel Concurrency Sanitizer on: [ 54.375846][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.10.0-rc4-syzkaller #0 [ 54.383788][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.393813][ T0] ================================================================== [ 54.401843][ T0] Kernel panic - not syncing: panic_on_warn set ... [ 54.408414][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.10.0-rc4-syzkaller #0 [ 54.416356][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.426413][ T0] Call Trace: [ 54.429721][ T0] dump_stack+0x116/0x15d [ 54.434025][ T0] panic+0x1e7/0x5fa [ 54.437893][ T0] ? vprintk_emit+0x2f2/0x370 [ 54.442542][ T0] kcsan_report+0x67b/0x680 [ 54.447029][ T0] ? kcsan_setup_watchpoint+0x46a/0x4d0 [ 54.452545][ T0] ? tick_nohz_next_event+0x217/0x300 [ 54.457884][ T0] ? tick_nohz_get_sleep_length+0x121/0x270 [ 54.463749][ T0] ? menu_select+0x2fa/0xf40 [ 54.468309][ T0] ? cpuidle_select+0x3d/0x50 [ 54.472970][ T0] ? do_idle+0x15f/0x230 [ 54.477182][ T0] ? cpu_startup_entry+0x15/0x20 [ 54.482091][ T0] ? rest_init+0xd7/0xe0 [ 54.486305][ T0] ? arch_call_rest_init+0xa/0xb [ 54.491214][ T0] ? start_kernel+0x5a0/0x625 [ 54.495860][ T0] ? secondary_startup_64_no_verify+0xb0/0xbb [ 54.501898][ T0] ? ktime_get+0x1b0/0x1e0 [ 54.506285][ T0] ? _raw_spin_lock_irqsave+0x25/0x90 [ 54.511627][ T0] kcsan_setup_watchpoint+0x46a/0x4d0 [ 54.516968][ T0] tick_nohz_next_event+0x217/0x300 [ 54.522135][ T0] tick_nohz_get_sleep_length+0x121/0x270 [ 54.527823][ T0] menu_select+0x2fa/0xf40 [ 54.532209][ T0] ? _raw_spin_unlock_irq+0x22/0x40 [ 54.537379][ T0] ? finish_task_switch+0x81/0x280 [ 54.542463][ T0] cpuidle_select+0x3d/0x50 [ 54.546936][ T0] do_idle+0x15f/0x230 [ 54.550976][ T0] cpu_startup_entry+0x15/0x20 [ 54.555708][ T0] rest_init+0xd7/0xe0 [ 54.559748][ T0] ? time_init+0xc/0xc [ 54.563803][ T0] arch_call_rest_init+0xa/0xb [ 54.568539][ T0] start_kernel+0x5a0/0x625 [ 54.573013][ T0] secondary_startup_64_no_verify+0xb0/0xbb [ 54.579580][ T0] Kernel Offset: disabled [ 54.583888][ T0] Rebooting in 86400 seconds..