Warning: Permanently added '10.128.0.233' (ECDSA) to the list of known hosts. 2020/12/02 05:25:10 fuzzer started 2020/12/02 05:25:11 dialing manager at 10.128.0.105:44295 2020/12/02 05:25:11 syscalls: 3454 2020/12/02 05:25:11 code coverage: enabled 2020/12/02 05:25:11 comparison tracing: enabled 2020/12/02 05:25:11 extra coverage: enabled 2020/12/02 05:25:11 setuid sandbox: enabled 2020/12/02 05:25:11 namespace sandbox: enabled 2020/12/02 05:25:11 Android sandbox: /sys/fs/selinux/policy does not exist 2020/12/02 05:25:11 fault injection: enabled 2020/12/02 05:25:11 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/12/02 05:25:11 net packet injection: enabled 2020/12/02 05:25:11 net device setup: enabled 2020/12/02 05:25:11 concurrency sanitizer: enabled 2020/12/02 05:25:11 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/12/02 05:25:11 USB emulation: enabled 2020/12/02 05:25:11 hci packet injection: enabled 2020/12/02 05:25:11 wifi device emulation: enabled 2020/12/02 05:25:14 suppressing KCSAN reports in functions: 'blk_mq_rq_ctx_init' 'ext4_free_inode' 'xas_clear_mark' 'do_sys_poll' 'futex_wait_queue_me' '__ext4_update_other_inode_time' 'generic_write_end' 'do_nanosleep' 'n_tty_receive_buf_common' 'get_signal' 'kauditd_thread' 'lru_add_drain_all' '__xa_clear_mark' 'ext4_mb_regular_allocator' 'complete_signal' 'ext4_setattr' 'do_signal_stop' '__delete_from_page_cache' 'do_notify_parent_cldstop' 'ext4_mb_good_group' 'exit_mm' '__add_to_page_cache_locked' '__xa_set_mark' 'ext4_writepages' 'ext4_free_inodes_count' 'snd_rawmidi_kernel_write1' 'alloc_pid' 'pcpu_alloc' 'ext4_mark_iloc_dirty' '__ext4_new_inode' 'blk_mq_sched_dispatch_requests' '__mark_inode_dirty' 'find_get_pages_range_tag' '__io_cqring_fill_event' 'io_sq_thread' 'wbt_issue' '_prb_read_valid' 'xas_find_marked' 'expire_timers' 'ext4_ext_insert_extent' 'wbt_done' 'capable' '__filemap_fdatawrite_range' 'blk_mq_dispatch_rq_list' 'do_select' 'dd_has_work' '__mod_timer' '__blk_mq_sched_dispatch_requests' syzkaller login: [ 128.493466][ T0] ================================================================== [ 128.505752][ T0] BUG: KCSAN: data-race in tick_nohz_next_event / tick_sched_timer [ 128.517298][ T0] [ 128.520614][ T0] write to 0xffffffff86fc1910 of 4 bytes by interrupt on cpu 0: [ 128.531340][ T0] tick_sched_timer+0x1f5/0x210 [ 128.538740][ T0] __run_hrtimer+0x133/0x420 [ 128.547524][ T0] hrtimer_interrupt+0x36e/0xa10 [ 128.555298][ T0] __sysvec_apic_timer_interrupt+0x6f/0x200 [ 128.566973][ T0] asm_call_irq_on_stack+0xf/0x20 [ 128.574284][ T0] sysvec_apic_timer_interrupt+0x52/0x90 [ 128.582621][ T0] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 128.592815][ T0] rmqueue_pcplist+0x161/0x190 [ 128.601357][ T0] rmqueue+0x100c/0x11d0 [ 128.608079][ T0] get_page_from_freelist+0x236/0x480 [ 128.617321][ T0] __alloc_pages_nodemask+0x19e/0x350 [ 128.625069][ T0] alloc_pages_current+0x21d/0x310 [ 128.632690][ T0] __page_cache_alloc+0x4d/0xf0 [ 128.641819][ T0] page_cache_ra_unbounded+0x1ae/0x4c0 [ 128.647742][ T0] ondemand_readahead+0x560/0x780 [ 128.654529][ T0] page_cache_async_ra+0x1aa/0x1d0 [ 128.662068][ T0] generic_file_buffered_read+0x450/0x23a0 [ 128.668690][ T0] generic_file_read_iter+0x80/0x3d0 [ 128.677197][ T0] ext4_file_read_iter+0x2d0/0x420 [ 128.685656][ T0] __kernel_read+0x307/0x560 05:26:50 executing program 0: [ 128.692440][ T0] integrity_kernel_read+0x4c/0x70 [ 128.700932][ T0] ima_calc_file_hash+0x9c7/0x1430 [ 128.708668][ T0] ima_collect_measurement+0x168/0x300 [ 128.716688][ T0] process_measurement+0x9f1/0x1050 [ 128.723312][ T0] ima_file_check+0x72/0xa0 [ 128.729374][ T0] path_openat+0x1887/0x20a0 [ 128.735984][ T0] do_filp_open+0xbd/0x1d0 [ 128.741704][ T0] do_sys_openat2+0xa3/0x240 [ 128.746423][ T0] __x64_sys_openat+0xef/0x110 [ 128.752433][ T0] do_syscall_64+0x39/0x80 [ 128.757406][ T0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 128.766810][ T0] [ 128.771140][ T0] read to 0xffffffff86fc1910 of 4 bytes by task 0 on cpu 1: [ 128.782774][ T0] tick_nohz_next_event+0x217/0x300 [ 128.790348][ T0] tick_nohz_get_sleep_length+0x121/0x270 [ 128.798910][ T0] menu_select+0x2fa/0xf40 [ 128.806038][ T0] cpuidle_select+0x3d/0x50 [ 128.814842][ T0] do_idle+0x15f/0x230 [ 128.820265][ T0] cpu_startup_entry+0x15/0x20 [ 128.831524][ T0] secondary_startup_64_no_verify+0xb0/0xbb [ 128.844958][ T0] [ 128.848983][ T0] Reported by Kernel Concurrency Sanitizer on: [ 128.857361][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.10.0-rc6-syzkaller #0 [ 128.873174][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 128.886722][ T0] ================================================================== [ 128.895518][ T0] Kernel panic - not syncing: panic_on_warn set ... [ 128.903183][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.10.0-rc6-syzkaller #0 [ 128.912131][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 128.924130][ T0] Call Trace: [ 128.928583][ T0] dump_stack+0x116/0x15d [ 128.934061][ T0] panic+0x1e7/0x5fa [ 128.938418][ T0] ? vprintk_emit+0x2f2/0x370 [ 128.943635][ T0] kcsan_report+0x67b/0x680 [ 128.948171][ T0] ? kcsan_setup_watchpoint+0x46a/0x4d0 [ 128.953786][ T0] ? tick_nohz_next_event+0x217/0x300 [ 128.959432][ T0] ? tick_nohz_get_sleep_length+0x121/0x270 [ 128.965515][ T0] ? menu_select+0x2fa/0xf40 [ 128.970583][ T0] ? cpuidle_select+0x3d/0x50 [ 128.976302][ T0] ? do_idle+0x15f/0x230 [ 128.981903][ T0] ? cpu_startup_entry+0x15/0x20 [ 128.987060][ T0] ? secondary_startup_64_no_verify+0xb0/0xbb [ 128.994013][ T0] ? __raw_callee_save___pv_queued_spin_unlock_slowpath+0x20/0x20 [ 129.003330][ T0] ? ktime_get+0x1b0/0x1e0 [ 129.008036][ T0] kcsan_setup_watchpoint+0x46a/0x4d0 [ 129.014298][ T0] tick_nohz_next_event+0x217/0x300 [ 129.020380][ T0] tick_nohz_get_sleep_length+0x121/0x270 [ 129.029715][ T0] menu_select+0x2fa/0xf40 [ 129.035914][ T0] ? _raw_spin_unlock_irq+0x22/0x40 [ 129.041955][ T0] ? finish_task_switch+0x81/0x280 [ 129.047085][ T0] cpuidle_select+0x3d/0x50 [ 129.051776][ T0] do_idle+0x15f/0x230 [ 129.055906][ T0] cpu_startup_entry+0x15/0x20 [ 129.060790][ T0] secondary_startup_64_no_verify+0xb0/0xbb [ 129.067617][ T0] Kernel Offset: disabled [ 129.073715][ T0] Rebooting in 86400 seconds..