[....] 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.
[ 51.675514][ T26] kauditd_printk_skb: 7 callbacks suppressed
[ 51.675531][ T26] audit: type=1800 audit(1580592849.635:29): pid=7925 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
[ 51.701972][ T26] audit: type=1800 audit(1580592849.635:30): pid=7925 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 '10.128.15.202' (ECDSA) to the list of known hosts.
2020/02/01 21:34:19 fuzzer started
2020/02/01 21:34:20 dialing manager at 10.128.0.105:40209
2020/02/01 21:34:20 syscalls: 2904
2020/02/01 21:34:20 code coverage: enabled
2020/02/01 21:34:20 comparison tracing: enabled
2020/02/01 21:34:20 extra coverage: enabled
2020/02/01 21:34:20 setuid sandbox: enabled
2020/02/01 21:34:20 namespace sandbox: enabled
2020/02/01 21:34:20 Android sandbox: /sys/fs/selinux/policy does not exist
2020/02/01 21:34:20 fault injection: enabled
2020/02/01 21:34:20 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/02/01 21:34:20 net packet injection: enabled
2020/02/01 21:34:20 net device setup: enabled
2020/02/01 21:34:20 concurrency sanitizer: enabled
2020/02/01 21:34:20 devlink PCI setup: PCI device 0000:00:10.0 is not available
syzkaller login: [ 63.593908][ C0] ==================================================================
[ 63.602093][ C0] BUG: KCSAN: data-race in __hrtimer_run_queues / hrtimer_active
[ 63.609810][ C0]
[ 63.612151][ C0] read to 0xffff88812c01fbd8 of 8 bytes by interrupt on cpu 1:
[ 63.619707][ C0] hrtimer_active+0x84/0x1a0
[ 63.624302][ C0] task_tick_fair+0x4c/0x910
[ 63.628947][ C0] scheduler_tick+0x5f/0xf0
[ 63.633468][ C0] update_process_times+0x5a/0x80
[ 63.638519][ C0] tick_sched_handle+0x75/0x100
[ 63.643371][ C0] tick_sched_timer+0x58/0xe0
[ 63.648058][ C0] __hrtimer_run_queues+0x274/0x5f0
[ 63.653270][ C0] hrtimer_interrupt+0x22a/0x480
[ 63.658220][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 63.663690][ C0] apic_timer_interrupt+0xf/0x20
[ 63.668786][ C0] kcsan_setup_watchpoint+0x1d4/0x460
[ 63.674179][ C0] __tsan_read1+0xc2/0x100
[ 63.678731][ C0] kallsyms_expand_symbol.constprop.0+0x103/0x160
[ 63.685159][ C0] kallsyms_lookup_name+0x7f/0x120
[ 63.690286][ C0] debugfs_write+0x14b/0x2d0
[ 63.696130][ C0] full_proxy_write+0xbd/0x100
[ 63.700910][ C0] __vfs_write+0x67/0xc0
[ 63.705415][ C0] vfs_write+0x18a/0x390
[ 63.709759][ C0] ksys_write+0xd5/0x1b0
[ 63.714022][ C0] __x64_sys_write+0x4c/0x60
[ 63.718752][ C0] do_syscall_64+0xcc/0x3a0
[ 63.723274][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 63.729179][ C0]
[ 63.731522][ C0] write to 0xffff88812c01fbd8 of 8 bytes by interrupt on cpu 0:
[ 63.739187][ C0] __hrtimer_run_queues+0x1e8/0x5f0
[ 63.744402][ C0] hrtimer_interrupt+0x22a/0x480
[ 63.749351][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 63.754827][ C0] apic_timer_interrupt+0xf/0x20
[ 63.760742][ C0] native_safe_halt+0xe/0x10
[ 63.765435][ C0] arch_cpu_idle+0xa/0x10
[ 63.769781][ C0] default_idle_call+0x1e/0x40
[ 63.774660][ C0] do_idle+0x1c2/0x290
[ 63.778740][ C0] cpu_startup_entry+0x1b/0x20
[ 63.783530][ C0] rest_init+0xec/0xf6
[ 63.787749][ C0] arch_call_rest_init+0x17/0x37
[ 63.792799][ C0] start_kernel+0x838/0x85e
[ 63.797323][ C0] x86_64_start_reservations+0x29/0x2b
[ 63.799595][ T8096] KCSAN: could not find function: 'poll_schedule_timeout'
[ 63.802815][ C0] x86_64_start_kernel+0x72/0x76
[ 63.814925][ C0] secondary_startup_64+0xa4/0xb0
[ 63.819940][ C0]
[ 63.822264][ C0] Reported by Kernel Concurrency Sanitizer on:
[ 63.828427][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc1-syzkaller #0
[ 63.836320][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 63.846379][ C0] ==================================================================
[ 63.854447][ C0] Kernel panic - not syncing: panic_on_warn set ...
[ 63.861143][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc1-syzkaller #0
[ 63.869048][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 63.879102][ C0] Call Trace:
[ 63.882387][ C0]
[ 63.885254][ C0] dump_stack+0x11d/0x181
[ 63.889598][ C0] panic+0x210/0x640
[ 63.893523][ C0] ? vprintk_func+0x8d/0x140
[ 63.898135][ C0] kcsan_report.cold+0xc/0xd
[ 63.902734][ C0] kcsan_setup_watchpoint+0x3fe/0x460
[ 63.908367][ C0] __tsan_unaligned_write8+0xc7/0x110
[ 63.913769][ C0] __hrtimer_run_queues+0x1e8/0x5f0
[ 63.918982][ C0] ? ktime_get_update_offsets_now+0x28f/0x2f0
[ 63.925063][ C0] hrtimer_interrupt+0x22a/0x480
[ 63.930038][ C0] ? sched_clock+0x13/0x20
[ 63.934475][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 63.939958][ C0] apic_timer_interrupt+0xf/0x20
[ 63.944932][ C0]
[ 63.947929][ C0] RIP: 0010:native_safe_halt+0xe/0x10
[ 63.953476][ C0] Code: cc cc cc cc cc cc cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d 4c e6 59 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 3c e6 59 00 fb f4 cc 55 48 89 e5 41 55 41 54 53 e8 d2 57 91 fc e8 fd da ab fd 0f
[ 63.973217][ C0] RSP: 0018:ffffffff85c03df8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 63.981633][ C0] RAX: 0000000000000000 RBX: ffffffff85c2b780 RCX: ffffffff82546c55
[ 63.989703][ C0] RDX: 0000000000000000 RSI: ffffffff82546c5e RDI: 0000000000000005
[ 63.997687][ C0] RBP: ffffffff85c03e18 R08: ffffffff85c2b780 R09: 0000ffff85a2d160
[ 64.005862][ C0] R10: 0000ffff85c03e08 R11: 0000ffff85a2d167 R12: 0000000000000000
[ 64.013846][ C0] R13: ffffffff85c2b780 R14: 0000000000000000 R15: 0000000000000000
[ 64.022182][ C0] ? debug_smp_processor_id+0x35/0x137
[ 64.027647][ C0] ? debug_smp_processor_id+0x3e/0x137
[ 64.033266][ C0] ? default_idle+0x26/0x180
[ 64.037866][ C0] arch_cpu_idle+0xa/0x10
[ 64.042206][ C0] default_idle_call+0x1e/0x40
[ 64.046985][ C0] do_idle+0x1c2/0x290
[ 64.051055][ C0] ? debug_smp_processor_id+0x43/0x137
[ 64.056536][ C0] cpu_startup_entry+0x1b/0x20
[ 64.061304][ C0] rest_init+0xec/0xf6
[ 64.065392][ C0] ? trace_event_define_fields_vector_free_moved+0xb4/0xb4
[ 64.072599][ C0] arch_call_rest_init+0x17/0x37
[ 64.077683][ C0] start_kernel+0x838/0x85e
[ 64.082201][ C0] x86_64_start_reservations+0x29/0x2b
[ 64.087668][ C0] x86_64_start_kernel+0x72/0x76
[ 64.092734][ C0] secondary_startup_64+0xa4/0xb0
[ 64.099313][ C0] Kernel Offset: disabled
[ 64.103742][ C0] Rebooting in 86400 seconds..