[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.25' (ECDSA) to the list of known hosts. 2021/02/13 23:23:34 fuzzer started 2021/02/13 23:23:34 dialing manager at 10.128.0.163:39273 2021/02/13 23:23:40 syscalls: 3540 2021/02/13 23:23:40 code coverage: enabled 2021/02/13 23:23:40 comparison tracing: enabled 2021/02/13 23:23:40 extra coverage: enabled 2021/02/13 23:23:40 setuid sandbox: enabled 2021/02/13 23:23:40 namespace sandbox: enabled 2021/02/13 23:23:40 Android sandbox: /sys/fs/selinux/policy does not exist 2021/02/13 23:23:40 fault injection: enabled 2021/02/13 23:23:40 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2021/02/13 23:23:40 net packet injection: enabled 2021/02/13 23:23:40 net device setup: enabled 2021/02/13 23:23:40 concurrency sanitizer: enabled 2021/02/13 23:23:40 devlink PCI setup: PCI device 0000:00:10.0 is not available 2021/02/13 23:23:40 USB emulation: enabled 2021/02/13 23:23:40 hci packet injection: enabled 2021/02/13 23:23:40 wifi device emulation: enabled 2021/02/13 23:23:40 802.15.4 emulation: enabled 2021/02/13 23:23:44 suppressing KCSAN reports in functions: 'blk_mq_dispatch_rq_list' 'blk_mq_rq_ctx_init' 'ext4_fc_commit' 'n_tty_receive_buf_common' 'kcm_rfree' 'blk_mq_sched_dispatch_requests' 'do_sys_poll' 'filemap_map_pages' 'xas_clear_mark' '__jbd2_journal_file_buffer' '__percpu_counter_compare' 'start_this_handle' 'alloc_pid' 'ext4_mark_iloc_dirty' 'jbd2_journal_dirty_metadata' '__ext4_new_inode' 'wbt_done' '__delete_from_page_cache' 'dput' '__xa_clear_mark' 'do_select' 'ext4_writepages' 'do_nanosleep' '_prb_read_valid' 'dd_has_work' 'isolate_migratepages_block' 'ext4_free_inodes_count' 'expire_timers' 'exit_mm' 'find_get_pages_range_tag' 'generic_write_end' '__ext4_journal_start_sb' 'futex_wait_queue_me' 'ext4_mb_good_group' '__add_to_page_cache_locked' 'jbd2_journal_commit_transaction' '__ext4_handle_dirty_metadata' 'ext4_free_inode' 2021/02/13 23:23:44 fetching corpus: 0, signal 0/2000 (executing 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tick_nohz_next_event / tick_sched_timer [ 83.619672][ T0] [ 83.621987][ T0] write to 0xffffffff879c1020 of 4 bytes by interrupt on cpu 1: [ 83.629623][ T0] tick_sched_timer+0x1f5/0x210 [ 83.634456][ T0] __run_hrtimer+0x163/0x460 [ 83.639024][ T0] hrtimer_interrupt+0x36e/0xa30 [ 83.643940][ T0] __sysvec_apic_timer_interrupt+0x6f/0x200 [ 83.649823][ T0] sysvec_apic_timer_interrupt+0x6f/0x90 [ 83.655428][ T0] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 83.661474][ T0] [ 83.663788][ T0] read to 0xffffffff879c1020 of 4 bytes by task 0 on cpu 0: [ 83.671051][ T0] tick_nohz_next_event+0x217/0x300 [ 83.676238][ T0] tick_nohz_get_sleep_length+0x121/0x280 [ 83.681939][ T0] menu_select+0x2f6/0x1000 [ 83.686426][ T0] cpuidle_select+0x3d/0x50 [ 83.690924][ T0] do_idle+0x15f/0x230 [ 83.695065][ T0] cpu_startup_entry+0x15/0x20 [ 83.699802][ T0] rest_init+0xd7/0xe0 [ 83.703857][ T0] arch_call_rest_init+0xa/0xb [ 83.708594][ T0] start_kernel+0x5a1/0x626 [ 83.713069][ T0] secondary_startup_64_no_verify+0xb0/0xbb [ 83.719467][ T0] [ 83.721778][ T0] Reported by Kernel Concurrency Sanitizer on: [ 83.727897][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.11.0-rc7-syzkaller #0 [ 83.737429][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.747480][ T0] ================================================================== [ 83.755507][ T0] Kernel panic - not syncing: panic_on_warn set ... [ 83.762071][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.11.0-rc7-syzkaller #0 [ 83.770117][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.780157][ T0] Call Trace: [ 83.783412][ T0] dump_stack+0x116/0x15d [ 83.787722][ T0] panic+0x1e7/0x5fa [ 83.791852][ T0] ? vprintk_emit+0x2e2/0x360 [ 83.796505][ T0] kcsan_report+0x67b/0x680 [ 83.800984][ T0] ? kcsan_setup_watchpoint+0x472/0x4d0 [ 83.806516][ T0] ? tick_nohz_next_event+0x217/0x300 [ 83.811958][ T0] ? tick_nohz_get_sleep_length+0x121/0x280 [ 83.817831][ T0] ? menu_select+0x2f6/0x1000 [ 83.822481][ T0] ? cpuidle_select+0x3d/0x50 [ 83.827135][ T0] ? do_idle+0x15f/0x230 [ 83.831351][ T0] ? cpu_startup_entry+0x15/0x20 [ 83.836275][ T0] ? rest_init+0xd7/0xe0 [ 83.840492][ T0] ? arch_call_rest_init+0xa/0xb [ 83.845415][ T0] ? start_kernel+0x5a1/0x626 [ 83.850065][ T0] ? secondary_startup_64_no_verify+0xb0/0xbb [ 83.856131][ T0] ? timekeeping_advance+0xb04/0xc80 [ 83.861393][ T0] ? ktime_get+0x1b0/0x1e0 [ 83.865792][ T0] ? _raw_spin_lock_irqsave+0x25/0x90 [ 83.871150][ T0] kcsan_setup_watchpoint+0x472/0x4d0 [ 83.876502][ T0] tick_nohz_next_event+0x217/0x300 [ 83.881680][ T0] tick_nohz_get_sleep_length+0x121/0x280 [ 83.887377][ T0] menu_select+0x2f6/0x1000 [ 83.891852][ T0] ? _raw_spin_unlock_irq+0x22/0x40 [ 83.897026][ T0] cpuidle_select+0x3d/0x50 [ 83.901516][ T0] do_idle+0x15f/0x230 [ 83.905557][ T0] cpu_startup_entry+0x15/0x20 [ 83.910302][ T0] rest_init+0xd7/0xe0 [ 83.914356][ T0] ? time_init+0xc/0xc [ 83.918401][ T0] arch_call_rest_init+0xa/0xb [ 83.923141][ T0] start_kernel+0x5a1/0x626 [ 83.927622][ T0] secondary_startup_64_no_verify+0xb0/0xbb [ 83.934230][ T0] Kernel Offset: disabled [ 83.938540][ T0] Rebooting in 86400 seconds..