[ 52.630361][ T27] audit: type=1800 audit(1580838986.984:30): pid=7995 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 '10.128.1.44' (ECDSA) to the list of known hosts. 2020/02/04 17:56:34 fuzzer started 2020/02/04 17:56:36 dialing manager at 10.128.0.105:41149 2020/02/04 17:56:37 syscalls: 2904 2020/02/04 17:56:37 code coverage: enabled 2020/02/04 17:56:37 comparison tracing: enabled 2020/02/04 17:56:37 extra coverage: enabled 2020/02/04 17:56:37 setuid sandbox: enabled 2020/02/04 17:56:37 namespace sandbox: enabled 2020/02/04 17:56:37 Android sandbox: /sys/fs/selinux/policy does not exist 2020/02/04 17:56:37 fault injection: enabled 2020/02/04 17:56:37 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/02/04 17:56:37 net packet injection: enabled 2020/02/04 17:56:37 net device setup: enabled 2020/02/04 17:56:37 concurrency sanitizer: enabled 2020/02/04 17:56:37 devlink PCI setup: PCI device 0000:00:10.0 is not available syzkaller login: [ 63.966303][ T8166] KCSAN: could not find function: 'poll_schedule_timeout' [ 65.444853][ T0] ================================================================== [ 65.453002][ T0] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64 [ 65.461922][ T0] [ 65.464251][ T0] write to 0xffffffff8624c7c8 of 8 bytes by interrupt on cpu 1: [ 65.471908][ T0] tick_do_update_jiffies64+0x100/0x250 [ 65.477652][ T0] tick_sched_do_timer+0xd4/0xe0 [ 65.482594][ T0] tick_sched_timer+0x43/0xe0 [ 65.487290][ T0] __hrtimer_run_queues+0x274/0x5f0 [ 65.492497][ T0] hrtimer_interrupt+0x22a/0x480 [ 65.497437][ T0] smp_apic_timer_interrupt+0xdc/0x280 [ 65.502982][ T0] apic_timer_interrupt+0xf/0x20 [ 65.507928][ T0] kcsan_setup_watchpoint+0x1d4/0x460 [ 65.513319][ T0] __tsan_unaligned_write1+0xc3/0x100 [ 65.518690][ T0] kallsyms_expand_symbol.constprop.0+0xe8/0x160 [ 65.525136][ T0] kallsyms_lookup_name+0x7f/0x120 [ 65.530255][ T0] debugfs_write+0x14b/0x2d0 [ 65.535022][ T0] full_proxy_write+0xbd/0x100 [ 65.539794][ T0] __vfs_write+0x67/0xc0 [ 65.544916][ T0] vfs_write+0x18a/0x390 [ 65.549179][ T0] ksys_write+0xd5/0x1b0 [ 65.553432][ T0] __x64_sys_write+0x4c/0x60 [ 65.558113][ T0] do_syscall_64+0xcc/0x3a0 [ 65.562761][ T0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.568732][ T0] [ 65.571069][ T0] read to 0xffffffff8624c7c8 of 8 bytes by task 0 on cpu 0: [ 65.578359][ T0] tick_do_update_jiffies64+0x2b/0x250 [ 65.583862][ T0] tick_irq_enter+0x139/0x1c0 [ 65.588549][ T0] irq_enter+0x4f/0x60 [ 65.592622][ T0] smp_apic_timer_interrupt+0x55/0x280 [ 65.598085][ T0] apic_timer_interrupt+0xf/0x20 [ 65.603127][ T0] native_safe_halt+0xe/0x10 [ 65.607735][ T0] arch_cpu_idle+0xa/0x10 [ 65.612065][ T0] default_idle_call+0x1e/0x40 [ 65.616834][ T0] do_idle+0x1c2/0x290 [ 65.620915][ T0] cpu_startup_entry+0x1b/0x20 [ 65.625685][ T0] rest_init+0xec/0xf6 [ 65.629760][ T0] arch_call_rest_init+0x17/0x37 [ 65.634705][ T0] start_kernel+0x838/0x85e [ 65.639232][ T0] x86_64_start_reservations+0x29/0x2b [ 65.644696][ T0] x86_64_start_kernel+0x72/0x76 [ 65.649638][ T0] secondary_startup_64+0xa4/0xb0 [ 65.654653][ T0] [ 65.656972][ T0] Reported by Kernel Concurrency Sanitizer on: [ 65.663135][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc1-syzkaller #0 [ 65.671024][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.681072][ T0] ================================================================== [ 65.689131][ T0] Kernel panic - not syncing: panic_on_warn set ... [ 65.695729][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc1-syzkaller #0 [ 65.703652][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.713743][ T0] Call Trace: [ 65.717025][ T0] [ 65.719999][ T0] dump_stack+0x11d/0x181 [ 65.724395][ T0] panic+0x210/0x640 [ 65.728292][ T0] ? vprintk_func+0x8d/0x140 [ 65.732895][ T0] kcsan_report.cold+0xc/0xd [ 65.737495][ T0] kcsan_setup_watchpoint+0x3fe/0x460 [ 65.742880][ T0] __tsan_read8+0xc6/0x100 [ 65.747586][ T0] tick_do_update_jiffies64+0x2b/0x250 [ 65.753066][ T0] tick_irq_enter+0x139/0x1c0 [ 65.757760][ T0] irq_enter+0x4f/0x60 [ 65.761838][ T0] smp_apic_timer_interrupt+0x55/0x280 [ 65.767293][ T0] apic_timer_interrupt+0xf/0x20 [ 65.772227][ T0] [ 65.775243][ T0] RIP: 0010:native_safe_halt+0xe/0x10 [ 65.780630][ T0] 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 [ 65.800239][ T0] RSP: 0018:ffffffff85c03df8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 65.808664][ T0] RAX: 0000000000000000 RBX: ffffffff85c2b780 RCX: ffffffff82546c55 [ 65.816651][ T0] RDX: 0000000000000000 RSI: ffffffff82546c5e RDI: 0000000000000005 [ 65.824629][ T0] RBP: ffffffff85c03e18 R08: ffffffff85c2b780 R09: 0000ffff85a2d160 [ 65.832608][ T0] R10: 0000ffff85c03e08 R11: 0000ffff85a2d167 R12: 0000000000000000 [ 65.840681][ T0] R13: ffffffff85c2b780 R14: 0000000000000000 R15: 0000000000000000 [ 65.848692][ T0] ? debug_smp_processor_id+0x35/0x137 [ 65.854161][ T0] ? debug_smp_processor_id+0x3e/0x137 [ 65.859630][ T0] ? default_idle+0x26/0x180 [ 65.864250][ T0] arch_cpu_idle+0xa/0x10 [ 65.868592][ T0] default_idle_call+0x1e/0x40 [ 65.873364][ T0] do_idle+0x1c2/0x290 [ 65.877443][ T0] ? debug_smp_processor_id+0x43/0x137 [ 65.882916][ T0] cpu_startup_entry+0x1b/0x20 [ 65.887690][ T0] rest_init+0xec/0xf6 [ 65.891783][ T0] ? trace_event_define_fields_vector_free_moved+0xb4/0xb4 [ 65.898989][ T0] arch_call_rest_init+0x17/0x37 [ 65.903930][ T0] start_kernel+0x838/0x85e [ 65.908528][ T0] x86_64_start_reservations+0x29/0x2b [ 65.913989][ T0] x86_64_start_kernel+0x72/0x76 [ 65.919043][ T0] secondary_startup_64+0xa4/0xb0 [ 65.929897][ T0] Kernel Offset: disabled [ 65.934236][ T0] Rebooting in 86400 seconds..