[info] Using makefile-style concurrent boot in runlevel 2. [ 51.120736][ T26] audit: type=1800 audit(1581409436.941:21): pid=7800 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0 [ 51.161988][ T26] audit: type=1800 audit(1581409436.951:22): pid=7800 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. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.39' (ECDSA) to the list of known hosts. 2020/02/11 08:24:08 fuzzer started 2020/02/11 08:24:10 dialing manager at 10.128.0.105:37391 2020/02/11 08:24:10 syscalls: 2904 2020/02/11 08:24:10 code coverage: enabled 2020/02/11 08:24:10 comparison tracing: enabled 2020/02/11 08:24:10 extra coverage: enabled 2020/02/11 08:24:10 setuid sandbox: enabled 2020/02/11 08:24:10 namespace sandbox: enabled 2020/02/11 08:24:10 Android sandbox: /sys/fs/selinux/policy does not exist 2020/02/11 08:24:10 fault injection: enabled 2020/02/11 08:24:10 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/02/11 08:24:10 net packet injection: enabled 2020/02/11 08:24:10 net device setup: enabled 2020/02/11 08:24:10 concurrency sanitizer: enabled 2020/02/11 08:24:10 devlink PCI setup: PCI device 0000:00:10.0 is not available syzkaller login: [ 66.182501][ C0] ================================================================== [ 66.191238][ C0] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64 [ 66.200723][ C0] [ 66.203042][ C0] write to 0xffffffff8624d7c8 of 8 bytes by task 0 on cpu 1: [ 66.210406][ C0] tick_do_update_jiffies64+0x100/0x250 [ 66.216150][ C0] tick_irq_enter+0x139/0x1c0 [ 66.220824][ C0] irq_enter+0x4f/0x60 [ 66.224901][ C0] smp_apic_timer_interrupt+0x55/0x280 [ 66.230463][ C0] apic_timer_interrupt+0xf/0x20 [ 66.235420][ C0] native_safe_halt+0xe/0x10 [ 66.240003][ C0] arch_cpu_idle+0xa/0x10 [ 66.244324][ C0] default_idle_call+0x1e/0x40 [ 66.249094][ C0] do_idle+0x1c2/0x290 [ 66.253342][ C0] cpu_startup_entry+0x1b/0x20 [ 66.258195][ C0] start_secondary+0x168/0x1b0 [ 66.262946][ C0] secondary_startup_64+0xa4/0xb0 [ 66.268091][ C0] [ 66.270405][ C0] read to 0xffffffff8624d7c8 of 8 bytes by interrupt on cpu 0: [ 66.277940][ C0] tick_do_update_jiffies64+0x2b/0x250 [ 66.283520][ C0] tick_sched_do_timer+0xd4/0xe0 [ 66.288543][ C0] tick_sched_timer+0x43/0xe0 [ 66.293275][ C0] __hrtimer_run_queues+0x274/0x5f0 [ 66.298896][ C0] hrtimer_interrupt+0x22a/0x480 [ 66.303833][ C0] smp_apic_timer_interrupt+0xdc/0x280 [ 66.309300][ C0] apic_timer_interrupt+0xf/0x20 [ 66.314228][ C0] __sanitizer_cov_trace_pc+0x0/0x50 [ 66.319606][ C0] kallsyms_lookup_name+0x7f/0x120 [ 66.324827][ C0] debugfs_write+0x16c/0x320 [ 66.329638][ C0] full_proxy_write+0xbd/0x100 [ 66.334544][ C0] __vfs_write+0x67/0xc0 [ 66.338780][ C0] vfs_write+0x18a/0x390 [ 66.343114][ C0] ksys_write+0xd5/0x1b0 [ 66.347348][ C0] __x64_sys_write+0x4c/0x60 [ 66.352162][ C0] do_syscall_64+0xcc/0x3a0 [ 66.356667][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 66.362541][ C0] [ 66.364851][ C0] Reported by Kernel Concurrency Sanitizer on: [ 66.370987][ C0] CPU: 0 PID: 7972 Comm: syz-executor Not tainted 5.5.0-rc1-syzkaller #0 [ 66.379645][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.390069][ C0] ================================================================== [ 66.398634][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 66.405215][ C0] CPU: 0 PID: 7972 Comm: syz-executor Not tainted 5.5.0-rc1-syzkaller #0 [ 66.413631][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.423676][ C0] Call Trace: [ 66.426988][ C0] [ 66.429833][ C0] dump_stack+0x11d/0x181 [ 66.434230][ C0] panic+0x210/0x640 [ 66.438128][ C0] ? vprintk_func+0x8d/0x140 [ 66.442805][ C0] kcsan_report.cold+0xc/0x15 [ 66.447486][ C0] kcsan_setup_watchpoint+0x2e2/0x380 [ 66.452849][ C0] __tsan_read8+0xc6/0x100 [ 66.457270][ C0] tick_do_update_jiffies64+0x2b/0x250 [ 66.463059][ C0] tick_sched_do_timer+0xd4/0xe0 [ 66.468076][ C0] tick_sched_timer+0x43/0xe0 [ 66.472764][ C0] __hrtimer_run_queues+0x274/0x5f0 [ 66.477965][ C0] ? tick_sched_handle+0x100/0x100 [ 66.483158][ C0] hrtimer_interrupt+0x22a/0x480 [ 66.488086][ C0] ? sched_clock+0x13/0x20 [ 66.492514][ C0] smp_apic_timer_interrupt+0xdc/0x280 [ 66.497956][ C0] apic_timer_interrupt+0xf/0x20 [ 66.502925][ C0] [ 66.505854][ C0] RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x50 [ 66.511911][ C0] Code: cc cc cc cc cc cc cc cc cc cc 65 48 8b 04 25 40 8c 01 00 48 8b 80 48 0a 00 00 c3 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 <55> 48 89 e5 65 48 8b 04 25 40 8c 01 00 65 8b 15 34 7d bc 7e 81 e2 [ 66.531928][ C0] RSP: 0018:ffffc900016cfbf8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 66.540353][ C0] RAX: 0000000000000000 RBX: ffffffff85833f28 RCX: ffffffff813fb851 [ 66.548310][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 [ 66.556274][ C0] RBP: ffffc900016cfc38 R08: ffff88812b1c5000 R09: 00000000aaaaaaab [ 66.564231][ C0] R10: 0000ffff85833f28 R11: 000088812b1c5b57 R12: 0000000000000000 [ 66.572279][ C0] R13: 0000000000000001 R14: ffffc900016cfc48 R15: 0000000000000080 [ 66.580249][ C0] ? kallsyms_expand_symbol.constprop.0+0x111/0x160 [ 66.586831][ C0] ? kallsyms_expand_symbol.constprop.0+0x11b/0x160 [ 66.593413][ C0] kallsyms_lookup_name+0x7f/0x120 [ 66.598607][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 66.604840][ C0] ? strlen+0x3b/0x60 [ 66.609020][ C0] debugfs_write+0x16c/0x320 [ 66.613716][ C0] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 66.619613][ C0] ? __read_once_size+0x5a/0xe0 [ 66.624458][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 66.630957][ C0] ? debugfs_file_get+0x12c/0x2a0 [ 66.636090][ C0] full_proxy_write+0xbd/0x100 [ 66.640847][ C0] __vfs_write+0x67/0xc0 [ 66.645076][ C0] ? full_proxy_poll+0xf0/0xf0 [ 66.649831][ C0] vfs_write+0x18a/0x390 [ 66.654066][ C0] ksys_write+0xd5/0x1b0 [ 66.658301][ C0] __x64_sys_write+0x4c/0x60 [ 66.662878][ C0] do_syscall_64+0xcc/0x3a0 [ 66.668339][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 66.674216][ C0] RIP: 0033:0x414e70 [ 66.678115][ C0] Code: b0 89 c8 f7 d8 eb ed b8 6e 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 83 3d fd 35 86 00 00 75 14 b8 01 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 c4 1b 00 00 c3 48 83 ec 08 e8 ca fc ff ff [ 66.697786][ C0] RSP: 002b:00007ffe4aa3dea8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 66.706192][ C0] RAX: ffffffffffffffda RBX: 0000000000000012 RCX: 0000000000414e70 [ 66.714150][ C0] RDX: 0000000000000012 RSI: 0000000000e0f950 RDI: 0000000000000003 [ 66.722261][ C0] RBP: 0000000000e0f950 R08: 0000000000000000 R09: 0000000000000012 [ 66.730232][ C0] R10: 0000000000000010 R11: 0000000000000246 R12: 0000000000000012 [ 66.738202][ C0] R13: 0000000000000001 R14: 00007ffe4aa3df20 R15: 0000000000000000 [ 66.747689][ C0] Kernel Offset: disabled [ 66.752009][ C0] Rebooting in 86400 seconds..