[ 46.405649][ T25] audit: type=1800 audit(1571269159.851:27): pid=7167 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0 [ 46.439372][ T25] audit: type=1800 audit(1571269159.861:28): pid=7167 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. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 47.170700][ T25] audit: type=1800 audit(1571269160.671:29): pid=7167 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 [ 47.191543][ T25] audit: type=1800 audit(1571269160.671:30): pid=7167 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. 2019/10/16 23:39:29 fuzzer started 2019/10/16 23:39:31 dialing manager at 10.128.0.105:33899 2019/10/16 23:39:31 syscalls: 2524 2019/10/16 23:39:31 code coverage: enabled 2019/10/16 23:39:31 comparison tracing: enabled 2019/10/16 23:39:31 extra coverage: extra coverage is not supported by the kernel 2019/10/16 23:39:31 setuid sandbox: enabled 2019/10/16 23:39:31 namespace sandbox: enabled 2019/10/16 23:39:31 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/16 23:39:31 fault injection: enabled 2019/10/16 23:39:31 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/10/16 23:39:31 net packet injection: enabled 2019/10/16 23:39:31 net device setup: enabled 2019/10/16 23:39:31 concurrency sanitizer: enabled syzkaller login: [ 58.003173][ C1] ================================================================== [ 58.011340][ C1] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64 [ 58.020726][ C1] [ 58.023076][ C1] write to 0xffffffff86042008 of 8 bytes by interrupt on cpu 0: [ 58.030838][ C1] tick_do_update_jiffies64+0x105/0x260 [ 58.036837][ C1] tick_sched_do_timer+0xd4/0xe0 [ 58.041799][ C1] tick_sched_timer+0x43/0xe0 [ 58.046468][ C1] __hrtimer_run_queues+0x288/0x600 [ 58.051651][ C1] hrtimer_interrupt+0x22a/0x480 [ 58.056703][ C1] smp_apic_timer_interrupt+0xdc/0x280 [ 58.062155][ C1] apic_timer_interrupt+0xf/0x20 [ 58.067511][ C1] security_mmap_addr+0x2d/0x90 [ 58.072368][ C1] get_unmapped_area+0x1e3/0x2a0 [ 58.077487][ C1] do_mmap+0x1fd/0xba0 [ 58.081667][ C1] vm_mmap_pgoff+0x12d/0x190 [ 58.086271][ C1] ksys_mmap_pgoff+0x99/0x420 [ 58.090940][ C1] __x64_sys_mmap+0x91/0xc0 [ 58.095438][ C1] do_syscall_64+0xcc/0x370 [ 58.099921][ C1] [ 58.102255][ C1] read to 0xffffffff86042008 of 8 bytes by interrupt on cpu 1: [ 58.109784][ C1] tick_do_update_jiffies64+0x2b/0x260 [ 58.115839][ C1] tick_sched_do_timer+0xd4/0xe0 [ 58.121336][ C1] tick_sched_timer+0x43/0xe0 [ 58.126034][ C1] __hrtimer_run_queues+0x288/0x600 [ 58.131270][ C1] hrtimer_interrupt+0x22a/0x480 [ 58.136275][ C1] smp_apic_timer_interrupt+0xdc/0x280 [ 58.141767][ C1] apic_timer_interrupt+0xf/0x20 [ 58.146846][ C1] [ 58.149174][ C1] Reported by Kernel Concurrency Sanitizer on: [ 58.155340][ C1] CPU: 1 PID: 7338 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #0 [ 58.162816][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.173093][ C1] ================================================================== [ 58.181164][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 58.187829][ C1] CPU: 1 PID: 7338 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #0 [ 58.195434][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.205494][ C1] Call Trace: [ 58.208798][ C1] [ 58.211666][ C1] dump_stack+0xf5/0x159 [ 58.215911][ C1] panic+0x210/0x640 [ 58.219799][ C1] ? vprintk_func+0x8d/0x140 [ 58.224410][ C1] kcsan_report.cold+0xc/0x1b [ 58.229086][ C1] __kcsan_setup_watchpoint+0x3ee/0x510 [ 58.234624][ C1] ? __kcsan_setup_watchpoint+0x96/0x510 [ 58.240427][ C1] __tsan_read8+0x2c/0x30 [ 58.244767][ C1] tick_do_update_jiffies64+0x2b/0x260 [ 58.250224][ C1] tick_sched_do_timer+0xd4/0xe0 [ 58.255182][ C1] tick_sched_timer+0x43/0xe0 [ 58.259893][ C1] __hrtimer_run_queues+0x288/0x600 [ 58.265138][ C1] ? tick_sched_do_timer+0xe0/0xe0 [ 58.270273][ C1] hrtimer_interrupt+0x22a/0x480 [ 58.275892][ C1] smp_apic_timer_interrupt+0xdc/0x280 [ 58.281381][ C1] ? smp_reschedule_interrupt+0x71/0x1d0 [ 58.287518][ C1] apic_timer_interrupt+0xf/0x20 [ 58.292805][ C1] [ 58.295748][ C1] RIP: 0033:0x41d447 [ 58.299640][ C1] Code: 00 00 02 00 0f 86 7f 01 00 00 b9 00 00 02 00 48 89 4c 24 50 49 c1 ea 03 49 83 e2 03 31 ff eb 0a 48 83 c7 08 4c 89 d1 45 89 c2 <48> 39 cf 0f 83 51 01 00 00 48 85 ff 0f 84 40 01 00 00 41 83 fa 03 [ 58.319352][ C1] RSP: 002b:000000c4202c1e90 EFLAGS: 00000212 ORIG_RAX: ffffffffffffff13 [ 58.327779][ C1] RAX: 000000c420000000 RBX: 000000c41ffe8b5c RCX: 0000000000000400 [ 58.335813][ C1] RDX: 000000c420800000 RSI: 000000c4202e9400 RDI: 0000000000000070 [ 58.343805][ C1] RBP: 000000c4202c1f28 R08: 0000000000000001 R09: 000000000109bb40 [ 58.351897][ C1] R10: 0000000000000001 R11: 000000c4203c4000 R12: 000000c42053b000 [ 58.360307][ C1] R13: 0000000000000028 R14: 0000000000000000 R15: 0000000000000000 [ 58.370034][ C1] Kernel Offset: disabled [ 58.374527][ C1] Rebooting in 86400 seconds..