[ 56.088728][ T26] audit: type=1800 audit(1573423992.526:28): pid=7792 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2450 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [ 56.720695][ T7855] sshd (7855) used greatest stack depth: 10128 bytes left [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 56.953182][ T26] audit: type=1800 audit(1573423993.476:29): pid=7792 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 [ 56.973310][ T26] audit: type=1800 audit(1573423993.476:30): pid=7792 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 '10.128.0.228' (ECDSA) to the list of known hosts. 2019/11/10 22:13:20 fuzzer started 2019/11/10 22:13:22 dialing manager at 10.128.0.105:33901 2019/11/10 22:13:22 syscalls: 2553 2019/11/10 22:13:22 code coverage: enabled 2019/11/10 22:13:22 comparison tracing: enabled 2019/11/10 22:13:22 extra coverage: extra coverage is not supported by the kernel 2019/11/10 22:13:22 setuid sandbox: enabled 2019/11/10 22:13:22 namespace sandbox: enabled 2019/11/10 22:13:22 Android sandbox: /sys/fs/selinux/policy does not exist 2019/11/10 22:13:22 fault injection: enabled 2019/11/10 22:13:22 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/11/10 22:13:22 net packet injection: enabled 2019/11/10 22:13:22 net device setup: enabled 2019/11/10 22:13:22 concurrency sanitizer: enabled 2019/11/10 22:13:22 devlink PCI setup: PCI device 0000:00:10.0 is not available syzkaller login: [ 71.578521][ C0] ================================================================== [ 71.588237][ C0] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64 [ 71.597161][ C0] [ 71.599570][ C0] write to 0xffffffff86043008 of 8 bytes by task 0 on cpu 1: [ 71.606943][ C0] tick_do_update_jiffies64+0x100/0x250 [ 71.612526][ C0] tick_irq_enter+0x139/0x1c0 [ 71.617388][ C0] irq_enter+0x4f/0x60 [ 71.621448][ C0] smp_apic_timer_interrupt+0x55/0x280 [ 71.626980][ C0] apic_timer_interrupt+0xf/0x20 [ 71.632510][ C0] native_safe_halt+0xe/0x10 [ 71.637103][ C0] arch_cpu_idle+0x1f/0x30 [ 71.641605][ C0] default_idle_call+0x1e/0x40 [ 71.646372][ C0] do_idle+0x1af/0x280 [ 71.650620][ C0] cpu_startup_entry+0x1b/0x20 [ 71.655909][ C0] start_secondary+0x208/0x260 [ 71.660873][ C0] secondary_startup_64+0xa4/0xb0 [ 71.667103][ C0] [ 71.669532][ C0] read to 0xffffffff86043008 of 8 bytes by interrupt on cpu 0: [ 71.677171][ C0] tick_do_update_jiffies64+0x2b/0x250 [ 71.682815][ C0] tick_sched_do_timer+0xd4/0xe0 [ 71.687772][ C0] tick_sched_timer+0x43/0xe0 [ 71.692658][ C0] __hrtimer_run_queues+0x274/0x5f0 [ 71.698211][ C0] hrtimer_interrupt+0x22a/0x480 [ 71.703528][ C0] smp_apic_timer_interrupt+0xdc/0x280 [ 71.708979][ C0] apic_timer_interrupt+0xf/0x20 [ 71.713910][ C0] kcsan_setup_watchpoint+0x205/0x410 [ 71.720070][ C0] __tsan_unaligned_write1+0x13d/0x1e0 [ 71.725539][ C0] kallsyms_expand_symbol.constprop.0+0xe8/0x160 [ 71.731851][ C0] kallsyms_lookup_name+0x7f/0x120 [ 71.736947][ C0] debugfs_write+0x14b/0x2d0 [ 71.741520][ C0] full_proxy_write+0xbd/0x100 [ 71.746265][ C0] __vfs_write+0x67/0xc0 [ 71.750496][ C0] vfs_write+0x18a/0x390 [ 71.754734][ C0] ksys_write+0xd5/0x1b0 [ 71.758961][ C0] __x64_sys_write+0x4c/0x60 [ 71.763538][ C0] do_syscall_64+0xcc/0x370 [ 71.768033][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 71.773924][ C0] [ 71.776235][ C0] Reported by Kernel Concurrency Sanitizer on: [ 71.782387][ C0] CPU: 0 PID: 7962 Comm: syz-executor Not tainted 5.4.0-rc6+ #0 [ 71.790436][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 71.800529][ C0] ================================================================== [ 71.808593][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 71.815185][ C0] CPU: 0 PID: 7962 Comm: syz-executor Not tainted 5.4.0-rc6+ #0 [ 71.823082][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 71.833328][ C0] Call Trace: [ 71.836771][ C0] [ 71.839615][ C0] dump_stack+0xf5/0x159 [ 71.843842][ C0] panic+0x210/0x640 [ 71.847727][ C0] ? vprintk_func+0x8d/0x140 [ 71.852301][ C0] kcsan_report.cold+0xc/0xe [ 71.856881][ C0] kcsan_setup_watchpoint+0x3fe/0x410 [ 71.862237][ C0] __tsan_read8+0x145/0x1f0 [ 71.866812][ C0] tick_do_update_jiffies64+0x2b/0x250 [ 71.872356][ C0] tick_sched_do_timer+0xd4/0xe0 [ 71.877311][ C0] tick_sched_timer+0x43/0xe0 [ 71.881979][ C0] __hrtimer_run_queues+0x274/0x5f0 [ 71.887182][ C0] ? tick_sched_handle+0x100/0x100 [ 71.892331][ C0] hrtimer_interrupt+0x22a/0x480 [ 71.897280][ C0] smp_apic_timer_interrupt+0xdc/0x280 [ 71.902830][ C0] ? smp_reschedule_interrupt+0x71/0x1d0 [ 71.908460][ C0] apic_timer_interrupt+0xf/0x20 [ 71.913389][ C0] [ 71.916325][ C0] RIP: 0010:kcsan_setup_watchpoint+0x205/0x410 [ 71.922480][ C0] Code: 5f 5d c3 83 ff 03 0f 85 ae fe ff ff bf 03 00 00 00 e8 7f 21 00 00 48 83 3d e7 c5 52 04 00 0f 84 24 01 00 00 48 8b 7d d0 57 9d <0f> 1f 44 00 00 eb c0 65 8b 05 75 ce ae 7e a9 00 01 1f 00 0f 84 4b [ 71.942091][ C0] RSP: 0018:ffffc900016abb98 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 [ 71.950506][ C0] RAX: 8002c900016abc48 RBX: 0000000000000001 RCX: ffffffff86046d78 [ 71.958499][ C0] RDX: 0000000000000001 RSI: ffffffff824ef4b7 RDI: 0000000000000282 [ 71.966469][ C0] RBP: ffffc900016abbd8 R08: ffff888120e25000 R09: 00000000aaaaaaab [ 71.974613][ C0] R10: 0000000000000000 R11: 00000000aaaaaaab R12: ffffc900016abc48 [ 71.982577][ C0] R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000073 [ 71.990665][ C0] ? debug_smp_processor_id+0x47/0x172 [ 71.996120][ C0] __tsan_unaligned_write1+0x13d/0x1e0 [ 72.001573][ C0] kallsyms_expand_symbol.constprop.0+0xe8/0x160 [ 72.007886][ C0] kallsyms_lookup_name+0x7f/0x120 [ 72.013000][ C0] ? __check_object_size+0x5f/0x346 [ 72.018184][ C0] ? strlen+0x3b/0x60 [ 72.022148][ C0] debugfs_write+0x14b/0x2d0 [ 72.026733][ C0] ? __do_once_done+0x140/0x140 [ 72.031568][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 72.037789][ C0] ? refcount_inc_not_zero_checked+0xba/0x150 [ 72.043854][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 72.050089][ C0] ? debugfs_file_get+0xae/0x1e0 [ 72.055008][ C0] full_proxy_write+0xbd/0x100 [ 72.059772][ C0] __vfs_write+0x67/0xc0 [ 72.064003][ C0] ? full_proxy_poll+0xf0/0xf0 [ 72.068772][ C0] vfs_write+0x18a/0x390 [ 72.073001][ C0] ksys_write+0xd5/0x1b0 [ 72.077229][ C0] __x64_sys_write+0x4c/0x60 [ 72.081807][ C0] do_syscall_64+0xcc/0x370 [ 72.086300][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 72.092169][ C0] RIP: 0033:0x413cd0 [ 72.096050][ 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 3d 43 66 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 [ 72.115651][ C0] RSP: 002b:00007ffc30439048 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 72.124053][ C0] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 0000000000413cd0 [ 72.132003][ C0] RDX: 0000000000000010 RSI: 00000000010f5950 RDI: 0000000000000003 [ 72.139954][ C0] RBP: 00000000010f5950 R08: 0000000000000100 R09: 0000000000000010 [ 72.147917][ C0] R10: 000000000000000e R11: 0000000000000246 R12: 0000000000000010 [ 72.155885][ C0] R13: 0000000000000001 R14: 00007ffc304390c0 R15: 0000000000000000 [ 72.165161][ C0] Kernel Offset: disabled [ 72.169486][ C0] Rebooting in 86400 seconds..