[ 52.890300][ T27] audit: type=1800 audit(1580399453.304:21): pid=7771 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0 [ 52.944617][ T27] audit: type=1800 audit(1580399453.304:22): pid=7771 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2480 res=0 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [ 54.537760][ T7838] sshd (7838) used greatest stack depth: 10136 bytes left [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.173' (ECDSA) to the list of known hosts. 2020/01/30 15:51:05 fuzzer started 2020/01/30 15:51:07 dialing manager at 10.128.0.105:37077 2020/01/30 15:51:07 syscalls: 2900 2020/01/30 15:51:07 code coverage: enabled 2020/01/30 15:51:07 comparison tracing: enabled 2020/01/30 15:51:07 extra coverage: enabled 2020/01/30 15:51:07 setuid sandbox: enabled 2020/01/30 15:51:07 namespace sandbox: enabled 2020/01/30 15:51:07 Android sandbox: /sys/fs/selinux/policy does not exist 2020/01/30 15:51:07 fault injection: enabled 2020/01/30 15:51:07 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/01/30 15:51:07 net packet injection: enabled 2020/01/30 15:51:07 net device setup: enabled 2020/01/30 15:51:07 concurrency sanitizer: enabled 2020/01/30 15:51:07 devlink PCI setup: PCI device 0000:00:10.0 is not available syzkaller login: [ 68.385053][ C0] ================================================================== [ 68.393243][ C0] BUG: KCSAN: data-race in __hrtimer_run_queues / hrtimer_active [ 68.400954][ C0] [ 68.403288][ C0] read to 0xffff88812c01fbd8 of 8 bytes by interrupt on cpu 1: [ 68.410838][ C0] hrtimer_active+0x84/0x1a0 [ 68.415439][ C0] task_tick_fair+0x4c/0x910 [ 68.420128][ C0] scheduler_tick+0x5f/0xf0 [ 68.424658][ C0] update_process_times+0x5a/0x80 [ 68.429693][ C0] tick_sched_handle+0x75/0x100 [ 68.434550][ C0] tick_sched_timer+0x58/0xe0 [ 68.439238][ C0] __hrtimer_run_queues+0x274/0x5f0 [ 68.444442][ C0] hrtimer_interrupt+0x22a/0x480 [ 68.449431][ C0] smp_apic_timer_interrupt+0xdc/0x280 [ 68.454905][ C0] apic_timer_interrupt+0xf/0x20 [ 68.459847][ C0] kcsan_setup_watchpoint+0x1d4/0x460 [ 68.465568][ C0] __tsan_unaligned_write1+0xc3/0x100 [ 68.471045][ C0] kallsyms_expand_symbol.constprop.0+0xe8/0x160 [ 68.477499][ C0] kallsyms_lookup_name+0x7f/0x120 [ 68.482717][ C0] debugfs_write+0x14b/0x2d0 [ 68.487307][ C0] full_proxy_write+0xbd/0x100 [ 68.492109][ C0] __vfs_write+0x67/0xc0 [ 68.496376][ C0] vfs_write+0x18a/0x390 [ 68.500666][ C0] ksys_write+0xd5/0x1b0 [ 68.504916][ C0] __x64_sys_write+0x4c/0x60 [ 68.509509][ C0] do_syscall_64+0xcc/0x3a0 [ 68.514034][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 68.519915][ C0] [ 68.522255][ C0] write to 0xffff88812c01fbd8 of 8 bytes by interrupt on cpu 0: [ 68.529890][ C0] __hrtimer_run_queues+0x16c/0x5f0 [ 68.535083][ C0] hrtimer_interrupt+0x22a/0x480 [ 68.540045][ C0] smp_apic_timer_interrupt+0xdc/0x280 [ 68.545530][ C0] apic_timer_interrupt+0xf/0x20 [ 68.550502][ C0] native_safe_halt+0xe/0x10 [ 68.555121][ C0] arch_cpu_idle+0xa/0x10 [ 68.559450][ C0] default_idle_call+0x1e/0x40 [ 68.564216][ C0] do_idle+0x1c2/0x290 [ 68.568294][ C0] cpu_startup_entry+0x1b/0x20 [ 68.573066][ C0] rest_init+0xec/0xf6 [ 68.577136][ C0] arch_call_rest_init+0x17/0x37 [ 68.582196][ C0] start_kernel+0x838/0x85e [ 68.586710][ C0] x86_64_start_reservations+0x29/0x2b [ 68.592192][ C0] x86_64_start_kernel+0x72/0x76 [ 68.597156][ C0] secondary_startup_64+0xa4/0xb0 [ 68.602258][ C0] [ 68.604628][ C0] Reported by Kernel Concurrency Sanitizer on: [ 68.610791][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc1-syzkaller #0 [ 68.618696][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.628749][ C0] ================================================================== [ 68.636813][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 68.643435][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc1-syzkaller #0 [ 68.651325][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.661466][ C0] Call Trace: [ 68.664740][ C0] [ 68.667606][ C0] dump_stack+0x11d/0x181 [ 68.672058][ C0] panic+0x210/0x640 [ 68.675965][ C0] ? vprintk_func+0x8d/0x140 [ 68.680585][ C0] kcsan_report.cold+0xc/0xd [ 68.685191][ C0] kcsan_setup_watchpoint+0x3fe/0x460 [ 68.690595][ C0] __tsan_unaligned_write8+0xc7/0x110 [ 68.695974][ C0] __hrtimer_run_queues+0x16c/0x5f0 [ 68.701312][ C0] ? tick_sched_handle+0x100/0x100 [ 68.706432][ C0] hrtimer_interrupt+0x22a/0x480 [ 68.711378][ C0] ? sched_clock+0x13/0x20 [ 68.715802][ C0] smp_apic_timer_interrupt+0xdc/0x280 [ 68.721266][ C0] apic_timer_interrupt+0xf/0x20 [ 68.726207][ C0] [ 68.729262][ C0] RIP: 0010:native_safe_halt+0xe/0x10 [ 68.734656][ 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 [ 68.754460][ C0] RSP: 0018:ffffffff85c03df8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 68.762927][ C0] RAX: 0000000000000000 RBX: ffffffff85c2b780 RCX: ffffffff82546c55 [ 68.770908][ C0] RDX: 0000000000000000 RSI: ffffffff82546c5e RDI: 0000000000000005 [ 68.778892][ C0] RBP: ffffffff85c03e18 R08: ffffffff85c2b780 R09: 0000ffff85a2d160 [ 68.786883][ C0] R10: 0000ffff85c03e08 R11: 0000ffff85a2d167 R12: 0000000000000000 [ 68.794862][ C0] R13: ffffffff85c2b780 R14: 0000000000000000 R15: 0000000000000000 [ 68.802856][ C0] ? debug_smp_processor_id+0x35/0x137 [ 68.808324][ C0] ? debug_smp_processor_id+0x3e/0x137 [ 68.813794][ C0] ? default_idle+0x26/0x180 [ 68.818391][ C0] arch_cpu_idle+0xa/0x10 [ 68.822731][ C0] default_idle_call+0x1e/0x40 [ 68.827525][ C0] do_idle+0x1c2/0x290 [ 68.831599][ C0] ? debug_smp_processor_id+0x43/0x137 [ 68.837083][ C0] cpu_startup_entry+0x1b/0x20 [ 68.842027][ C0] rest_init+0xec/0xf6 [ 68.846120][ C0] ? trace_event_define_fields_vector_free_moved+0xb4/0xb4 [ 68.853345][ C0] arch_call_rest_init+0x17/0x37 [ 68.858408][ C0] start_kernel+0x838/0x85e [ 68.862926][ C0] x86_64_start_reservations+0x29/0x2b [ 68.868392][ C0] x86_64_start_kernel+0x72/0x76 [ 68.873347][ C0] secondary_startup_64+0xa4/0xb0 [ 68.879932][ C0] Kernel Offset: disabled [ 68.884786][ C0] Rebooting in 86400 seconds..