[ 50.942338][ T25] audit: type=1800 audit(1573488249.250:27): pid=7857 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0
[ 50.972626][ T25] audit: type=1800 audit(1573488249.260:28): pid=7857 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[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 51.533273][ T25] audit: type=1800 audit(1573488249.950:29): pid=7857 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
[ 51.553338][ T25] audit: type=1800 audit(1573488249.950:30): pid=7857 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 '10.128.0.138' (ECDSA) to the list of known hosts.
2019/11/11 16:04:19 fuzzer started
2019/11/11 16:04:20 dialing manager at 10.128.0.105:44241
2019/11/11 16:04:20 syscalls: 2566
2019/11/11 16:04:20 code coverage: enabled
2019/11/11 16:04:20 comparison tracing: enabled
2019/11/11 16:04:20 extra coverage: extra coverage is not supported by the kernel
2019/11/11 16:04:20 setuid sandbox: enabled
2019/11/11 16:04:20 namespace sandbox: enabled
2019/11/11 16:04:20 Android sandbox: /sys/fs/selinux/policy does not exist
2019/11/11 16:04:20 fault injection: enabled
2019/11/11 16:04:20 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/11/11 16:04:20 net packet injection: enabled
2019/11/11 16:04:20 net device setup: enabled
2019/11/11 16:04:20 concurrency sanitizer: enabled
2019/11/11 16:04:20 devlink PCI setup: PCI device 0000:00:10.0 is not available
2019/11/11 16:04:22 adding functions to KCSAN blacklist: '__hrtimer_run_queues' 'tomoyo_supervisor' 'tcp_add_backlog' 'find_get_pages_range_tag' 'pid_update_inode' 'generic_write_end' 'vm_area_dup' 'generic_permission' 'file_update_time' 'tick_do_update_jiffies64'
syzkaller login: [ 65.672388][ C0] ==================================================================
[ 65.680526][ C0] BUG: KCSAN: data-race in tick_sched_do_timer / tick_sched_do_timer
[ 65.688566][ C0]
[ 65.690879][ C0] read to 0xffffffff85cb3cd0 of 4 bytes by interrupt on cpu 1:
[ 65.698403][ C0] tick_sched_do_timer+0x33/0xe0
[ 65.703463][ C0] tick_sched_timer+0x43/0xe0
[ 65.708125][ C0] __hrtimer_run_queues+0x274/0x5f0
[ 65.713301][ C0] hrtimer_interrupt+0x22a/0x480
[ 65.718221][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 65.723661][ C0] apic_timer_interrupt+0xf/0x20
[ 65.728601][ C0] tick_nohz_idle_exit+0x136/0x1e0
[ 65.733690][ C0] do_idle+0xb1/0x280
[ 65.737649][ C0] cpu_startup_entry+0x1b/0x20
[ 65.742395][ C0] start_secondary+0x208/0x260
[ 65.747139][ C0] secondary_startup_64+0xa4/0xb0
[ 65.752133][ C0]
[ 65.754445][ C0] write to 0xffffffff85cb3cd0 of 4 bytes by interrupt on cpu 0:
[ 65.762052][ C0] tick_sched_do_timer+0xc0/0xe0
[ 65.766971][ C0] tick_sched_timer+0x43/0xe0
[ 65.771626][ C0] __hrtimer_run_queues+0x274/0x5f0
[ 65.776799][ C0] hrtimer_interrupt+0x22a/0x480
[ 65.781716][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 65.787154][ C0] apic_timer_interrupt+0xf/0x20
[ 65.792073][ C0] new_sync_write+0x249/0x4a0
[ 65.796728][ C0] __vfs_write+0xb1/0xc0
[ 65.800952][ C0] vfs_write+0x18a/0x390
[ 65.805175][ C0] ksys_write+0xd5/0x1b0
[ 65.809395][ C0] __x64_sys_write+0x4c/0x60
[ 65.813968][ C0] do_syscall_64+0xcc/0x370
[ 65.818462][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 65.824323][ C0]
[ 65.826627][ C0] Reported by Kernel Concurrency Sanitizer on:
[ 65.832760][ C0] CPU: 0 PID: 8028 Comm: syz-fuzzer Not tainted 5.4.0-rc6+ #0
[ 65.840188][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 65.850218][ C0] ==================================================================
[ 65.858256][ C0] Kernel panic - not syncing: panic_on_warn set ...
[ 65.864824][ C0] CPU: 0 PID: 8028 Comm: syz-fuzzer Not tainted 5.4.0-rc6+ #0
[ 65.872257][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 65.882292][ C0] Call Trace:
[ 65.885554][ C0]
[ 65.888408][ C0] dump_stack+0xf5/0x159
[ 65.892631][ C0] panic+0x210/0x640
[ 65.896511][ C0] ? vprintk_func+0x8d/0x140
[ 65.901082][ C0] kcsan_report.cold+0xc/0xe
[ 65.905657][ C0] kcsan_setup_watchpoint+0x3fe/0x410
[ 65.911010][ C0] __tsan_unaligned_write4+0x143/0x1f0
[ 65.916449][ C0] tick_sched_do_timer+0xc0/0xe0
[ 65.921369][ C0] tick_sched_timer+0x43/0xe0
[ 65.926041][ C0] __hrtimer_run_queues+0x274/0x5f0
[ 65.931226][ C0] ? tick_sched_handle+0x100/0x100
[ 65.936323][ C0] hrtimer_interrupt+0x22a/0x480
[ 65.941254][ C0] smp_apic_timer_interrupt+0xdc/0x280
[ 65.946695][ C0] ? do_IRQ+0xcb/0x180
[ 65.950788][ C0] apic_timer_interrupt+0xf/0x20
[ 65.955702][ C0]
[ 65.958631][ C0] RIP: 0010:new_sync_write+0x249/0x4a0
[ 65.964076][ C0] Code: 00 00 e8 ca 85 d8 ff 48 8d 7b 20 e8 91 9f e5 ff 4c 8b 63 20 49 8d bc 24 8f 00 00 00 e8 40 8e e5 ff 45 0f b6 a4 24 8f 00 00 00 a2 85 d8 ff 65 48 8b 04 25 40 6c 01 00 48 8d b8 c8 07 00 00 48
[ 65.983670][ C0] RSP: 0018:ffffc9000167bd58 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13
[ 65.992094][ C0] RAX: 000000000000004b RBX: ffff888125b97900 RCX: 0000ffffffffffff
[ 66.000044][ C0] RDX: 0000000000000000 RSI: 0000000000000010 RDI: ffff888125090a0f
[ 66.007994][ C0] RBP: ffffc9000167be00 R08: 0000888125090a0f R09: 00000000aaaaaaab
[ 66.015948][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[ 66.023897][ C0] R13: 0000000000000000 R14: ffffc9000167bea8 R15: 0000000000000008
[ 66.031866][ C0] ? new_sync_write+0x240/0x4a0
[ 66.036704][ C0] ? apparmor_file_permission+0x36/0x40
[ 66.042234][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 66.048466][ C0] ? security_file_permission+0x88/0x280
[ 66.054082][ C0] __vfs_write+0xb1/0xc0
[ 66.058311][ C0] vfs_write+0x18a/0x390
[ 66.062541][ C0] ksys_write+0xd5/0x1b0
[ 66.066767][ C0] __x64_sys_write+0x4c/0x60
[ 66.071348][ C0] do_syscall_64+0xcc/0x370
[ 66.075835][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 66.081703][ C0] RIP: 0033:0x47c530
[ 66.085585][ C0] Code: 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 49 c7 c2 00 00 00 00 49 c7 c0 00 00 00 00 49 c7 c1 00 00 00 00 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30
[ 66.105168][ C0] RSP: 002b:000000c4204df4f8 EFLAGS: 00000216 ORIG_RAX: 0000000000000001
[ 66.113559][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530
[ 66.121510][ C0] RDX: 0000000000000008 RSI: 000000c4202ee020 RDI: 0000000000000003
[ 66.129461][ C0] RBP: 000000c4204df550 R08: 0000000000000000 R09: 0000000000000000
[ 66.137413][ C0] R10: 0000000000000000 R11: 0000000000000216 R12: 000000c4200afb00
[ 66.145364][ C0] R13: 0000000000000007 R14: 0000000000c1dc00 R15: 00000000000014de
[ 66.154487][ C0] Kernel Offset: disabled
[ 66.158808][ C0] Rebooting in 86400 seconds..