Warning: Permanently added '10.128.10.19' (ECDSA) to the list of known hosts. 2020/08/04 20:30:20 fuzzer started 2020/08/04 20:30:20 dialing manager at 10.128.0.105:36669 2020/08/04 20:30:20 syscalls: 3271 2020/08/04 20:30:20 code coverage: enabled 2020/08/04 20:30:20 comparison tracing: enabled 2020/08/04 20:30:20 extra coverage: enabled 2020/08/04 20:30:20 setuid sandbox: enabled 2020/08/04 20:30:20 namespace sandbox: enabled 2020/08/04 20:30:20 Android sandbox: /sys/fs/selinux/policy does not exist 2020/08/04 20:30:20 fault injection: enabled 2020/08/04 20:30:20 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/08/04 20:30:20 net packet injection: enabled 2020/08/04 20:30:20 net device setup: enabled 2020/08/04 20:30:20 concurrency sanitizer: enabled 2020/08/04 20:30:20 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/08/04 20:30:20 USB emulation: enabled 2020/08/04 20:30:20 hci packet injection: enabled 2020/08/04 20:30:24 suppressing KCSAN reports in functions: 'wg_packet_send_staged_packets' 'do_select' 'tick_nohz_next_event' 'shmem_file_read_iter' 'do_readlinkat' 'blk_mq_sched_dispatch_requests' '__mark_inode_dirty' '__writeback_single_inode' 'tick_sched_timer' 'complete_signal' '__delete_from_page_cache' 'n_tty_receive_buf_common' '__add_to_page_cache_locked' 'exit_signals' '__xa_set_mark' 'blk_mq_rq_ctx_init' 'expire_timers' 'shmem_unlink' 'lookup_fast' '__ext4_update_other_inode_time' '__ext4_new_inode' 'generic_write_end' 'do_nanosleep' '__delayacct_blkio_end' 'kauditd_thread' 'pcpu_alloc' 'netlink_getname' '__mod_timer' '__filemap_fdatawrite_range' 'shmem_getpage_gfp' 'n_tty_receive_char_inline' 'ext4_mb_regular_allocator' 'futex_wait_queue_me' 'ext4_mb_good_group' 'wbt_wait' 'wbt_issue' 'ext4_free_inodes_count' 'snd_rawmidi_poll' 'dd_has_work' 'page_counter_charge' 'do_syslog' 'ondemand_readahead' 'exit_mm' 'get_signal' 'find_get_pages_range_tag' 'ext4_mark_iloc_dirty' 'blk_mq_dispatch_rq_list' 'ext4_writepages' '__xa_clear_mark' 'xas_find_marked' 'alloc_pid' '__process_echoes' 'do_signal_stop' 'shmem_add_to_page_cache' 'audit_log_start' 'ext4_free_inode' 'fsnotify_parent' 'get_scan_count' syzkaller login: [ 105.759129][ C0] ================================================================== [ 105.767209][ C0] BUG: KCSAN: data-race in add_timer_on / timer_clear_idle [ 105.774365][ C0] [ 105.776663][ C0] write to 0xffff88812c11cb24 of 1 bytes by task 0 on cpu 1: [ 105.783998][ C0] timer_clear_idle+0x2e/0x40 [ 105.788664][ C0] tick_nohz_idle_retain_tick+0x3e/0x40 [ 105.794174][ C0] do_idle+0x287/0x310 [ 105.798223][ C0] cpu_startup_entry+0x15/0x20 [ 105.802954][ C0] secondary_startup_64+0xa4/0xb0 [ 105.807948][ C0] [ 105.810247][ C0] read to 0xffff88812c11cb24 of 1 bytes by interrupt on cpu 0: [ 105.817755][ C0] add_timer_on+0x218/0x3b0 [ 105.822224][ C0] clocksource_watchdog+0x729/0x760 [ 105.827389][ C0] call_timer_fn+0x30/0x2a0 [ 105.831855][ C0] expire_timers+0x116/0x290 [ 105.836419][ C0] __run_timers+0x443/0x500 [ 105.840906][ C0] run_timer_softirq+0x2e/0x60 [ 105.845648][ C0] __do_softirq+0x198/0x360 [ 105.850116][ C0] asm_call_on_stack+0xf/0x20 [ 105.854763][ C0] do_softirq_own_stack+0x5d/0x80 [ 105.859754][ C0] __irq_exit_rcu+0x115/0x120 [ 105.864407][ C0] sysvec_apic_timer_interrupt+0xba/0xd0 [ 105.870005][ C0] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 105.875943][ C0] [ 105.878247][ C0] Reported by Kernel Concurrency Sanitizer on: [ 105.884366][ C0] CPU: 0 PID: 8681 Comm: syz-fuzzer Not tainted 5.8.0-syzkaller #0 [ 105.892217][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 105.902237][ C0] ================================================================== [ 105.910264][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 105.916817][ C0] CPU: 0 PID: 8681 Comm: syz-fuzzer Not tainted 5.8.0-syzkaller #0 [ 105.924668][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 105.934789][ C0] Call Trace: [ 105.938051][ C0] [ 105.940891][ C0] dump_stack+0x10f/0x19d [ 105.945197][ C0] panic+0x207/0x64a [ 105.949060][ C0] ? vprintk_emit+0x44a/0x4f0 [ 105.953717][ C0] kcsan_report+0x684/0x690 [ 105.958187][ C0] ? kcsan_setup_watchpoint+0x41e/0x4a0 [ 105.963696][ C0] ? add_timer_on+0x218/0x3b0 [ 105.968351][ C0] ? clocksource_watchdog+0x729/0x760 [ 105.973688][ C0] ? call_timer_fn+0x30/0x2a0 [ 105.978340][ C0] ? expire_timers+0x116/0x290 [ 105.983068][ C0] ? __run_timers+0x443/0x500 [ 105.987710][ C0] ? run_timer_softirq+0x2e/0x60 [ 105.992617][ C0] ? __do_softirq+0x198/0x360 [ 105.997270][ C0] ? asm_call_on_stack+0xf/0x20 [ 106.002104][ C0] ? do_softirq_own_stack+0x5d/0x80 [ 106.007284][ C0] ? __irq_exit_rcu+0x115/0x120 [ 106.012121][ C0] ? sysvec_apic_timer_interrupt+0xba/0xd0 [ 106.017894][ C0] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 106.024021][ C0] ? cpumask_next+0x1e/0x30 [ 106.028493][ C0] ? select_idle_smt+0x39/0x90 [ 106.033223][ C0] ? select_idle_sibling+0x50/0x430 [ 106.038390][ C0] kcsan_setup_watchpoint+0x41e/0x4a0 [ 106.043739][ C0] add_timer_on+0x218/0x3b0 [ 106.048221][ C0] clocksource_watchdog+0x729/0x760 [ 106.053388][ C0] ? __clocksource_select+0x340/0x340 [ 106.058722][ C0] call_timer_fn+0x30/0x2a0 [ 106.063194][ C0] ? __clocksource_select+0x340/0x340 [ 106.068530][ C0] expire_timers+0x116/0x290 [ 106.073085][ C0] __run_timers+0x443/0x500 [ 106.077558][ C0] ? __kfree_skb_flush+0x7e/0xa0 [ 106.082476][ C0] ? kvm_sched_clock_read+0x15/0x40 [ 106.087641][ C0] run_timer_softirq+0x2e/0x60 [ 106.092374][ C0] __do_softirq+0x198/0x360 [ 106.096847][ C0] ? asm_sysvec_apic_timer_interrupt+0xa/0x20 [ 106.102892][ C0] asm_call_on_stack+0xf/0x20 [ 106.107593][ C0] [ 106.110508][ C0] do_softirq_own_stack+0x5d/0x80 [ 106.115504][ C0] __irq_exit_rcu+0x115/0x120 [ 106.120163][ C0] sysvec_apic_timer_interrupt+0xba/0xd0 [ 106.125777][ C0] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 106.131866][ C0] RIP: 0033:0x40f274 [ 106.135735][ C0] Code: 24 70 48 8d 6c 24 70 48 8b bc 24 80 00 00 00 48 8b 5f 18 0f b6 73 08 40 f6 c6 04 0f 85 fe 04 00 00 48 89 5c 24 58 48 8b 77 10 <48> 89 74 24 48 4c 8b 47 50 4c 8b 4f 28 44 0f b6 57 4b 4c 8b 5f 58 [ 106.155320][ C0] RSP: 002b:000000c012f15798 EFLAGS: 00000246 [ 106.161358][ C0] RAX: 000000c012f15850 RBX: 000000c00a722ab0 RCX: 000000c000000180 [ 106.169312][ C0] RDX: 0000000000000000 RSI: 00000000008e4fa0 RDI: 000000c012f15850 [ 106.177263][ C0] RBP: 000000c012f15808 R08: 0000000000000000 R09: 000000c00a98743b [ 106.185205][ C0] R10: 0000000000000005 R11: ffffffffffffffff R12: 0000000000000003 [ 106.193154][ C0] R13: 0000000000000023 R14: 00000000000000ef R15: ffffffffffffffff [ 107.263403][ C0] Shutting down cpus with NMI [ 107.269141][ C0] Kernel Offset: disabled [ 107.273447][ C0] Rebooting in 86400 seconds..