[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 48.025410][ T26] kauditd_printk_skb: 6 callbacks suppressed
[ 48.025424][ T26] audit: type=1800 audit(1575241781.469:29): pid=7381 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2465 res=0
[ 48.054808][ T26] audit: type=1800 audit(1575241781.469:30): pid=7381 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2456 res=0
Debian GNU/Linux 7 syzkaller ttyS0
Warning: Permanently added '10.128.0.137' (ECDSA) to the list of known hosts.
2019/12/01 23:09:49 fuzzer started
2019/12/01 23:09:51 dialing manager at 10.128.0.105:42079
2019/12/01 23:10:00 syscalls: 2671
2019/12/01 23:10:00 code coverage: enabled
2019/12/01 23:10:00 comparison tracing: enabled
2019/12/01 23:10:00 extra coverage: extra coverage is not supported by the kernel
2019/12/01 23:10:00 setuid sandbox: enabled
2019/12/01 23:10:00 namespace sandbox: enabled
2019/12/01 23:10:00 Android sandbox: /sys/fs/selinux/policy does not exist
2019/12/01 23:10:00 fault injection: enabled
2019/12/01 23:10:00 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/12/01 23:10:00 net packet injection: enabled
2019/12/01 23:10:00 net device setup: enabled
2019/12/01 23:10:00 concurrency sanitizer: enabled
2019/12/01 23:10:00 devlink PCI setup: PCI device 0000:00:10.0 is not available
syzkaller login: [ 70.265605][ T7545] KCSAN: could not find function: 'poll_schedule_timeout'
2019/12/01 23:10:08 adding functions to KCSAN blacklist: 'blk_mq_get_request' 'atime_needs_update' 'xas_clear_mark' 'ep_poll' 'echo_char' 'blk_mq_sched_dispatch_requests' 'taskstats_exit' 'add_timer' 'timer_clear_idle' 'pipe_poll' 'blk_mq_dispatch_rq_list' 'do_exit' 'run_timer_softirq' 'ext4_nonda_switch' 'ext4_has_free_clusters' 'list_lru_count_one' 'wbt_done' 'rcu_gp_fqs_check_wake' 'do_nanosleep' 'tick_nohz_idle_stop_tick' 'mod_timer' 'poll_schedule_timeout' 'n_tty_receive_buf_common' '__delete_from_page_cache' '__ext4_new_inode' '__splice_from_pipe' 'tick_sched_do_timer' 'ext4_free_inode' 'tick_do_update_jiffies64' 'inactive_list_is_low' 'process_srcu' 'copy_process' 'futex_wait_queue_me' 'install_new_memslots' 'ext4_free_inodes_count' '__mark_inode_dirty' 'vm_area_dup' '__dentry_kill' 'find_next_bit' 'tcp_add_backlog' 'pid_update_inode' '__hrtimer_run_queues' 'yama_ptracer_del' '__perf_event_overflow' 'tomoyo_supervisor' 'generic_write_end' 'dd_has_work' 'sbitmap_queue_clear' 'lruvec_lru_size' 'xas_find_marked' 'audit_log_start' 'pipe_wait' '__snd_rawmidi_transmit_ack' 'sit_tunnel_xmit'
[ 179.041187][ C0] ==================================================================
[ 179.049316][ C0] BUG: KCSAN: data-race in hrtimer_wakeup / schedule_hrtimeout_range_clock
[ 179.057873][ C0]
[ 179.060182][ C0] read to 0xffffc90001377848 of 8 bytes by task 7531 on cpu 1:
[ 179.067702][ C0] schedule_hrtimeout_range_clock+0x109/0x1e0
[ 179.073748][ C0] schedule_hrtimeout_range+0x34/0x50
[ 179.079100][ C0] poll_schedule_timeout.constprop.0+0x75/0xc0
[ 179.085280][ C0] do_select+0xd7f/0x1020
[ 179.089588][ C0] core_sys_select+0x381/0x550
[ 179.094328][ C0] do_pselect.constprop.0+0x11d/0x160
[ 179.099682][ C0] __x64_sys_pselect6+0x12e/0x170
[ 179.104685][ C0] do_syscall_64+0xcc/0x370
[ 179.109168][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 179.115031][ C0]
[ 179.117338][ C0] write to 0xffffc90001377848 of 8 bytes by interrupt on cpu 0:
[ 179.124945][ C0] hrtimer_wakeup+0x32/0x60
[ 179.129429][ C0] __hrtimer_run_queues+0x274/0x5f0
[ 179.134620][ C0] hrtimer_interrupt+0x22a/0x480
[ 179.139537][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 179.144972][ C0] apic_timer_interrupt+0xf/0x20
[ 179.149889][ C0] tick_nohz_idle_enter+0xe0/0x110
[ 179.154976][ C0] do_idle+0x3b/0x280
[ 179.158933][ C0] cpu_startup_entry+0x1b/0x20
[ 179.163688][ C0] rest_init+0xec/0xf6
[ 179.167735][ C0] arch_call_rest_init+0x17/0x37
[ 179.172647][ C0] start_kernel+0x838/0x85e
[ 179.177129][ C0] x86_64_start_reservations+0x29/0x2b
[ 179.182567][ C0] x86_64_start_kernel+0x72/0x76
[ 179.187492][ C0] secondary_startup_64+0xa4/0xb0
[ 179.192492][ C0]
[ 179.194796][ C0] Reported by Kernel Concurrency Sanitizer on:
[ 179.200929][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-syzkaller #0
[ 179.208464][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 179.218495][ C0] ==================================================================
[ 179.226546][ C0] Kernel panic - not syncing: panic_on_warn set ...
[ 179.233133][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-syzkaller #0
[ 179.240653][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 179.250687][ C0] Call Trace:
[ 179.253953][ C0]
[ 179.256801][ C0] dump_stack+0x11d/0x181
[ 179.261112][ C0] panic+0x210/0x640
[ 179.264995][ C0] ? vprintk_func+0x8d/0x140
[ 179.269613][ C0] kcsan_report.cold+0xc/0xd
[ 179.274190][ C0] kcsan_setup_watchpoint+0x3fe/0x460
[ 179.279543][ C0] __tsan_unaligned_write8+0xc4/0x100
[ 179.284891][ C0] hrtimer_wakeup+0x32/0x60
[ 179.289372][ C0] __hrtimer_run_queues+0x274/0x5f0
[ 179.294555][ C0] ? hrtimer_active+0x1a0/0x1a0
[ 179.299387][ C0] hrtimer_interrupt+0x22a/0x480
[ 179.304304][ C0] ? sched_clock+0x13/0x20
[ 179.308721][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 179.314175][ C0] apic_timer_interrupt+0xf/0x20
[ 179.319102][ C0]
[ 179.322054][ C0] RIP: 0010:tick_nohz_idle_enter+0xe0/0x110
[ 179.327934][ C0] Code: 4b 4c 04 e8 22 81 f5 ff 48 c7 c7 30 61 a5 85 e8 d6 04 14 00 48 83 3d fe 2b 68 04 00 74 28 e8 97 f7 06 00 fb 66 0f 1f 44 00 00 ab f5 13 00 5b 41 5c 41 5d 5d c3 e8 7f f7 06 00 0f 0b e8 78 f7
[ 179.347520][ C0] RSP: 0018:ffffffff85a03e20 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
[ 179.355909][ C0] RAX: ffffffff85a2b780 RBX: ffff88812be1dce0 RCX: ffffffff86041ce8
[ 179.363860][ C0] RDX: 0000000000000000 RSI: ffffffff813d3539 RDI: ffffffff85a56130
[ 179.371810][ C0] RBP: ffffffff85a03e38 R08: 0000000000000000 R09: 0000ffff85a56130
[ 179.379758][ C0] R10: 0000000000000000 R11: 0000ffff85a56137 R12: 00000029ae490bf5
[ 179.387708][ C0] R13: ffff88812be1dd2c R14: 0000000000000000 R15: 0000000000000000
[ 179.395674][ C0] ? tick_nohz_idle_enter+0xd9/0x110
[ 179.400941][ C0] do_idle+0x3b/0x280
[ 179.404903][ C0] cpu_startup_entry+0x1b/0x20
[ 179.409660][ C0] rest_init+0xec/0xf6
[ 179.413713][ C0] ? trace_event_define_fields_vector_free_moved+0xb4/0xb4
[ 179.420887][ C0] arch_call_rest_init+0x17/0x37
[ 179.425806][ C0] start_kernel+0x838/0x85e
[ 179.430292][ C0] x86_64_start_reservations+0x29/0x2b
[ 179.435750][ C0] x86_64_start_kernel+0x72/0x76
[ 179.440671][ C0] secondary_startup_64+0xa4/0xb0
[ 179.447087][ C0] Kernel Offset: disabled
[ 179.451433][ C0] Rebooting in 86400 seconds..