[[0;32m OK [0m] Reached target Graphical Interface.
Starting Update UTMP about System Runlevel Changes...
Starting Load/Save RF Kill Switch Status...
[[0;32m OK [0m] Started Update UTMP about System Runlevel Changes.
[[0;32m OK [0m] Started Load/Save RF Kill Switch Status.
Debian GNU/Linux 9 syzkaller ttyS0
syzkaller login: [ 44.865043][ T8882] bash (8882) used greatest stack depth: 10440 bytes left
Warning: Permanently added '10.128.1.60' (ECDSA) to the list of known hosts.
2020/05/22 18:12:32 fuzzer started
2020/05/22 18:12:32 dialing manager at 10.128.0.105:38353
2020/05/22 18:12:32 syscalls: 3055
2020/05/22 18:12:32 code coverage: enabled
2020/05/22 18:12:32 comparison tracing: enabled
2020/05/22 18:12:32 extra coverage: enabled
2020/05/22 18:12:32 setuid sandbox: enabled
2020/05/22 18:12:32 namespace sandbox: enabled
2020/05/22 18:12:32 Android sandbox: /sys/fs/selinux/policy does not exist
2020/05/22 18:12:32 fault injection: enabled
2020/05/22 18:12:32 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/05/22 18:12:32 net packet injection: enabled
2020/05/22 18:12:32 net device setup: enabled
2020/05/22 18:12:32 concurrency sanitizer: enabled
2020/05/22 18:12:32 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/05/22 18:12:32 USB emulation: enabled
[ 52.612336][ T8920] KCSAN: could not find function: '_find_next_bit'
2020/05/22 18:12:34 adding functions to KCSAN blacklist: '_find_next_bit' 'blk_mq_sched_dispatch_requests' 'ext4_free_inodes_count' 'shmem_file_read_iter' 'kcm_rfree' '__ext4_new_inode' 'dd_has_work' 'ep_poll' 'generic_write_end' 'ext4_mark_iloc_dirty' 'xas_clear_mark' 'add_timer' 'copy_process'
[ 83.535215][ C1] ==================================================================
[ 83.543360][ C1] BUG: KCSAN: data-race in tick_sched_do_timer / tick_sched_do_timer
[ 83.551399][ C1]
[ 83.553744][ C1] write to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 0:
[ 83.562679][ C1] tick_sched_do_timer+0xb4/0xd0
[ 83.567617][ C1] tick_sched_timer+0x3f/0xd0
[ 83.572289][ C1] __hrtimer_run_queues+0x271/0x600
[ 83.577482][ C1] hrtimer_interrupt+0x226/0x490
[ 83.582417][ C1] smp_apic_timer_interrupt+0xd8/0x270
[ 83.587867][ C1] apic_timer_interrupt+0xf/0x20
[ 83.592775][ C1]
[ 83.595098][ C1] read to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 1:
[ 83.602636][ C1] tick_sched_do_timer+0x2e/0xd0
[ 83.607569][ C1] tick_sched_timer+0x3f/0xd0
[ 83.612234][ C1] __hrtimer_run_queues+0x271/0x600
[ 83.617425][ C1] hrtimer_interrupt+0x226/0x490
[ 83.622357][ C1] smp_apic_timer_interrupt+0xd8/0x270
[ 83.627814][ C1] apic_timer_interrupt+0xf/0x20
[ 83.632853][ C1] native_safe_halt+0xe/0x10
[ 83.638182][ C1] default_idle+0x21/0x170
[ 83.646259][ C1] do_idle+0x1b7/0x290
[ 83.650325][ C1] cpu_startup_entry+0x14/0x20
[ 83.655087][ C1] start_secondary+0x169/0x1b0
[ 83.659847][ C1] secondary_startup_64+0xa4/0xb0
[ 83.664856][ C1]
[ 83.667174][ C1] Reported by Kernel Concurrency Sanitizer on:
[ 83.673328][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[ 83.682461][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 83.693984][ C1] ==================================================================
[ 83.702449][ C1] Kernel panic - not syncing: panic_on_warn set ...
[ 83.710673][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
[ 83.721278][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 83.733658][ C1] Call Trace:
[ 83.736929][ C1]
[ 83.739839][ C1] dump_stack+0x11d/0x187
[ 83.744261][ C1] panic+0x210/0x640
[ 83.748686][ C1] ? vprintk_func+0x89/0x13a
[ 83.753744][ C1] kcsan_report.cold+0xc/0x1a
[ 83.759052][ C1] kcsan_setup_watchpoint+0x3fb/0x440
[ 83.765294][ C1] tick_sched_do_timer+0x2e/0xd0
[ 83.770501][ C1] tick_sched_timer+0x3f/0xd0
[ 83.775521][ C1] __hrtimer_run_queues+0x271/0x600
[ 83.782720][ C1] ? tick_sched_do_timer+0xd0/0xd0
[ 83.787939][ C1] hrtimer_interrupt+0x226/0x490
[ 83.793141][ C1] ? kvm_clock_read+0x14/0x30
[ 83.797814][ C1] smp_apic_timer_interrupt+0xd8/0x270
[ 83.803295][ C1] apic_timer_interrupt+0xf/0x20
[ 83.808326][ C1]
[ 83.811265][ C1] RIP: 0010:native_safe_halt+0xe/0x10
[ 83.817452][ C1] Code: ff cc cc cc cc cc cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d 0c d6 58 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d fc d5 58 00 fb f4 cc 41 54 55 53 e8 97 b2 71 fb e8 a2 21 bc fc 0f 1f 44 00 00 48
[ 83.842366][ C1] RSP: 0018:ffffc90000cd3eb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 83.851180][ C1] RAX: 0000000000000001 RBX: ffff88812b797040 RCX: ffffffff8285fdf1
[ 83.860831][ C1] RDX: 0000000000000000 RSI: ffffffff8285fdfa RDI: 0000000000000005
[ 83.869394][ C1] RBP: 0000000000000001 R08: ffff88812b797040 R09: 0000ffff87047928
[ 83.878523][ C1] R10: 0000c90000cd3e98 R11: 0000ffff8704792f R12: ffff88812b797040
[ 83.886596][ C1] R13: 0000000000000000 R14: 0000000000000000 R15: ffff88812b797040
[ 83.895630][ C1] ? debug_smp_processor_id+0x31/0x129
[ 83.901683][ C1] ? debug_smp_processor_id+0x3a/0x129
[ 83.907849][ C1] default_idle+0x21/0x170
[ 83.914410][ C1] do_idle+0x1b7/0x290
[ 83.918841][ C1] ? debug_smp_processor_id+0x3a/0x129
[ 83.926530][ C1] cpu_startup_entry+0x14/0x20
[ 83.931733][ C1] start_secondary+0x169/0x1b0
[ 83.938148][ C1] secondary_startup_64+0xa4/0xb0
[ 83.947121][ C1] Kernel Offset: disabled
[ 83.951642][ C1] Rebooting in 86400 seconds..