[[0;32m OK [0m] Reached target Login Prompts.
[[0;32m OK [0m] Reached target Multi-User System.
[[0;32m OK [0m] Reached target Graphical Interface.
Starting Update UTMP about System Runlevel Changes...
[[0;32m OK [0m] Started Update UTMP about System Runlevel Changes.
Debian GNU/Linux 9 syzkaller ttyS0
Warning: Permanently added '10.128.0.77' (ECDSA) to the list of known hosts.
2020/06/07 21:33:16 fuzzer started
2020/06/07 21:33:17 dialing manager at 10.128.0.105:40519
2020/06/07 21:33:19 syscalls: 3055
2020/06/07 21:33:19 code coverage: enabled
2020/06/07 21:33:19 comparison tracing: enabled
2020/06/07 21:33:19 extra coverage: enabled
2020/06/07 21:33:19 setuid sandbox: enabled
2020/06/07 21:33:19 namespace sandbox: enabled
2020/06/07 21:33:19 Android sandbox: /sys/fs/selinux/policy does not exist
2020/06/07 21:33:19 fault injection: enabled
2020/06/07 21:33:19 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/06/07 21:33:19 net packet injection: enabled
2020/06/07 21:33:19 net device setup: enabled
2020/06/07 21:33:19 concurrency sanitizer: enabled
2020/06/07 21:33:19 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/06/07 21:33:19 USB emulation: enabled
syzkaller login: [ 52.519891][ T8910] KCSAN: could not find function: '_find_next_bit'
2020/06/07 21:33:22 adding functions to KCSAN blacklist: '__send_signal' 'do_nanosleep' 'generic_fillattr' 'generic_write_end' 'page_counter_charge' 'do_syslog' 'xas_clear_mark' '__ext4_new_inode' 'find_get_pages_range_tag' 'run_timer_softirq' '_find_next_bit' 'copy_process' 'ext4_mark_iloc_dirty' 'exit_signals' 'dd_has_work' 'ext4_free_inodes_count' '__mark_inode_dirty' '__mpage_writepage' 'tick_nohz_idle_stop_tick' 'futex_wait_queue_me' 'ktime_get_real_seconds' 'do_signal_stop' 'ep_poll'
[ 56.486892][ C1] ==================================================================
[ 56.495031][ C1] BUG: KCSAN: data-race in tick_sched_do_timer / tick_sched_do_timer
[ 56.503080][ C1]
[ 56.505405][ C1] write to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 0:
[ 56.513034][ C1] tick_sched_do_timer+0xb4/0xd0
[ 56.517976][ C1] tick_sched_timer+0x3f/0xd0
[ 56.522659][ C1] __hrtimer_run_queues+0x271/0x600
[ 56.527849][ C1] hrtimer_interrupt+0x226/0x490
[ 56.532873][ C1] smp_apic_timer_interrupt+0xd8/0x270
[ 56.538302][ C1] apic_timer_interrupt+0xf/0x20
[ 56.543204][ C1]
[ 56.545560][ C1] read to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 1:
[ 56.553087][ C1] tick_sched_do_timer+0x2e/0xd0
[ 56.558010][ C1] tick_sched_timer+0x3f/0xd0
[ 56.562659][ C1] __hrtimer_run_queues+0x271/0x600
[ 56.567840][ C1] hrtimer_interrupt+0x226/0x490
[ 56.572752][ C1] smp_apic_timer_interrupt+0xd8/0x270
[ 56.578181][ C1] apic_timer_interrupt+0xf/0x20
[ 56.583103][ C1] _raw_spin_unlock_irq+0x4b/0x80
[ 56.588110][ C1] finish_task_switch+0x7b/0x260
[ 56.593033][ C1] __schedule+0x30f/0x6b0
[ 56.597350][ C1] schedule+0x41/0xe0
[ 56.601302][ C1] do_nanosleep+0x138/0x320
[ 56.605792][ C1] hrtimer_nanosleep+0x136/0x230
[ 56.610713][ C1] __x64_sys_nanosleep+0x14b/0x190
[ 56.615798][ C1] do_syscall_64+0xc7/0x3b0
[ 56.620273][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 56.626129][ C1]
[ 56.628438][ C1] Reported by Kernel Concurrency Sanitizer on:
[ 56.634575][ C1] CPU: 1 PID: 8897 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[ 56.642779][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 56.652805][ C1] ==================================================================
[ 56.660843][ C1] Kernel panic - not syncing: panic_on_warn set ...
[ 56.667415][ C1] CPU: 1 PID: 8897 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[ 56.675628][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 56.685653][ C1] Call Trace:
[ 56.688922][ C1]
[ 56.691765][ C1] dump_stack+0x11d/0x187
[ 56.696069][ C1] panic+0x210/0x640
[ 56.699952][ C1] ? vprintk_func+0x89/0x13a
[ 56.704527][ C1] kcsan_report.cold+0xc/0x1a
[ 56.709183][ C1] kcsan_setup_watchpoint+0x3fb/0x440
[ 56.714534][ C1] tick_sched_do_timer+0x2e/0xd0
[ 56.719467][ C1] tick_sched_timer+0x3f/0xd0
[ 56.724117][ C1] __hrtimer_run_queues+0x271/0x600
[ 56.729342][ C1] ? tick_sched_do_timer+0xd0/0xd0
[ 56.734438][ C1] hrtimer_interrupt+0x226/0x490
[ 56.739349][ C1] ? kvm_clock_read+0x14/0x30
[ 56.744005][ C1] smp_apic_timer_interrupt+0xd8/0x270
[ 56.749439][ C1] apic_timer_interrupt+0xf/0x20
[ 56.754356][ C1]
[ 56.757269][ C1] RIP: 0010:_raw_spin_unlock_irq+0x4b/0x80
[ 56.763049][ C1] Code: 00 74 42 48 89 df e8 84 05 6d fb 66 90 48 c7 c7 d0 c9 25 87 e8 a6 da 8a fb 48 83 3d 2e dd 5b 01 00 74 24 fb 66 0f 1f 44 00 00 01 00 00 00 e8 cb 7d 6a fb 65 8b 05 4c 9f 37 7a 85 c0 74 0a 5b
[ 56.782637][ C1] RSP: 0018:ffffc90000ebbd08 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
[ 56.791995][ C1] RAX: ffff888126a22a18 RBX: ffff88812c12c9c0 RCX: ffffffff88af0438
[ 56.799954][ C1] RDX: 000000000000002b RSI: ffffffff8285fdfa RDI: ffffffff8725c9d0
[ 56.807907][ C1] RBP: ffffc90000ebbd50 R08: 0000000000000000 R09: 0000ffff8725c9d0
[ 56.815852][ C1] R10: 0000000000000000 R11: 0000ffff8725c9d7 R12: ffff88812c12c9c0
[ 56.823807][ C1] R13: ffff88812b797040 R14: ffff8881267d0980 R15: 0000000000000000
[ 56.831775][ C1] ? debug_smp_processor_id+0x3a/0x129
[ 56.840264][ C1] ? _raw_spin_unlock_irq+0x3a/0x80
[ 56.845450][ C1] finish_task_switch+0x7b/0x260
[ 56.850362][ C1] ? __switch_to+0x13a/0x470
[ 56.854933][ C1] __schedule+0x30f/0x6b0
[ 56.859255][ C1] schedule+0x41/0xe0
[ 56.863211][ C1] do_nanosleep+0x138/0x320
[ 56.867700][ C1] ? hrtimer_init_sleeper+0x7d/0x180
[ 56.872992][ C1] hrtimer_nanosleep+0x136/0x230
[ 56.877996][ C1] ? hrtimer_active+0x1b0/0x1b0
[ 56.882860][ C1] __x64_sys_nanosleep+0x14b/0x190
[ 56.887965][ C1] do_syscall_64+0xc7/0x3b0
[ 56.892450][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 56.898332][ C1] RIP: 0033:0x468a8d
[ 56.902212][ C1] Code: 8b 44 24 20 b9 40 42 0f 00 f7 f1 48 89 04 24 b8 e8 03 00 00 f7 e2 48 89 44 24 08 48 89 e7 be 00 00 00 00 b8 23 00 00 00 0f 05 <48> 8b 6c 24 10 48 83 c4 18 c3 cc cc cc cc cc cc cc cc cc b8 ba 00
[ 56.921816][ C1] RSP: 002b:000000c00004df18 EFLAGS: 00000202 ORIG_RAX: 0000000000000023
[ 56.930202][ C1] RAX: ffffffffffffffda RBX: 0000000000000014 RCX: 0000000000468a8d
[ 56.938148][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000c00004df18
[ 56.946108][ C1] RBP: 000000c00004df28 R08: 0000000000001c87 R09: 0000000000000038
[ 56.954075][ C1] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000439470
[ 56.962034][ C1] R13: 0000000000000000 R14: 0000000000ab4b60 R15: 0000000000000000
[ 56.971224][ C1] Kernel Offset: disabled
[ 56.975542][ C1] Rebooting in 86400 seconds..