[ 39.140736][ T26] audit: type=1800 audit(1571117942.258:25): pid=7083 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0
[ 39.161519][ T26] audit: type=1800 audit(1571117942.258:26): pid=7083 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0
[ 39.183289][ T26] audit: type=1800 audit(1571117942.258:27): pid=7083 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0
[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 39.673907][ T7146] sshd (7146) used greatest stack depth: 10032 bytes left
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
Debian GNU/Linux 7 syzkaller ttyS0
Warning: Permanently added '10.128.15.217' (ECDSA) to the list of known hosts.
2019/10/15 05:39:13 fuzzer started
2019/10/15 05:39:14 dialing manager at 10.128.0.105:33683
2019/10/15 05:39:14 syscalls: 2523
2019/10/15 05:39:14 code coverage: enabled
2019/10/15 05:39:14 comparison tracing: enabled
2019/10/15 05:39:14 extra coverage: extra coverage is not supported by the kernel
2019/10/15 05:39:14 setuid sandbox: enabled
2019/10/15 05:39:14 namespace sandbox: enabled
2019/10/15 05:39:14 Android sandbox: /sys/fs/selinux/policy does not exist
2019/10/15 05:39:14 fault injection: enabled
2019/10/15 05:39:14 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/10/15 05:39:14 net packet injection: enabled
2019/10/15 05:39:14 net device setup: enabled
2019/10/15 05:39:14 concurrency sanitizer: enabled
syzkaller login: [ 54.232596][ T0] ==================================================================
[ 54.241014][ T0] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64
[ 54.249941][ T0]
[ 54.252421][ T0] write to 0xffffffff8603f008 of 8 bytes by task 0 on cpu 0:
[ 54.259876][ T0] tick_do_update_jiffies64+0x105/0x260
[ 54.265418][ T0] tick_irq_enter+0x139/0x1c0
[ 54.270092][ T0] irq_enter+0x4f/0x60
[ 54.274159][ T0] do_IRQ+0x55/0x150
[ 54.278041][ T0] ret_from_intr+0x0/0x19
[ 54.282373][ T0] native_safe_halt+0xe/0x10
[ 54.288619][ T0] arch_cpu_idle+0x1f/0x30
[ 54.293154][ T0] default_idle_call+0x1e/0x40
[ 54.297925][ T0] do_idle+0x1ea/0x2c0
[ 54.302002][ T0] cpu_startup_entry+0x1b/0x20
[ 54.306773][ T0] rest_init+0xec/0xf6
[ 54.310851][ T0] arch_call_rest_init+0x17/0x37
[ 54.315797][ T0] start_kernel+0x83e/0x864
[ 54.320311][ T0] x86_64_start_reservations+0x29/0x2b
[ 54.325861][ T0]
[ 54.328189][ T0] read to 0xffffffff8603f008 of 8 bytes by task 0 on cpu 1:
[ 54.335575][ T0] tick_do_update_jiffies64+0x2b/0x260
[ 54.341033][ T0] tick_irq_enter+0x139/0x1c0
[ 54.345697][ T0] irq_enter+0x4f/0x60
[ 54.349757][ T0] do_IRQ+0x55/0x150
[ 54.353652][ T0] ret_from_intr+0x0/0x19
[ 54.357989][ T0] native_safe_halt+0xe/0x10
[ 54.362588][ T0] arch_cpu_idle+0x1f/0x30
[ 54.367127][ T0] default_idle_call+0x1e/0x40
[ 54.371902][ T0] do_idle+0x1ea/0x2c0
[ 54.376031][ T0] cpu_startup_entry+0x1b/0x20
[ 54.380782][ T0] start_secondary+0x207/0x260
[ 54.385532][ T0] secondary_startup_64+0xa4/0xb0
[ 54.390532][ T0]
[ 54.392848][ T0] Reported by Kernel Concurrency Sanitizer on:
[ 54.399025][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0+ #0
[ 54.405770][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 54.415827][ T0] ==================================================================
[ 54.424677][ T0] Kernel panic - not syncing: panic_on_warn set ...
[ 54.431284][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0+ #0
[ 54.438037][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 54.448090][ T0] Call Trace:
[ 54.451387][ T0]
[ 54.454248][ T0] dump_stack+0xf5/0x159
[ 54.458483][ T0] panic+0x209/0x639
[ 54.462537][ T0] ? do_idle+0x1ea/0x2c0
[ 54.466786][ T0] ? vprintk_func+0x8d/0x140
[ 54.471519][ T0] kcsan_report.cold+0xc/0x1b
[ 54.476321][ T0] __kcsan_setup_watchpoint+0x3ee/0x510
[ 54.481878][ T0] __tsan_read8+0x2c/0x30
[ 54.486219][ T0] tick_do_update_jiffies64+0x2b/0x260
[ 54.491690][ T0] tick_irq_enter+0x139/0x1c0
[ 54.496374][ T0] irq_enter+0x4f/0x60
[ 54.500544][ T0] do_IRQ+0x55/0x150
[ 54.504538][ T0] common_interrupt+0xf/0xf
[ 54.509034][ T0]
[ 54.511963][ T0] RIP: 0010:native_safe_halt+0xe/0x10
[ 54.517424][ T0] Code: 90 90 90 90 90 90 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d 8c d2 4e 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 7c d2 4e 00 fb f4 90 55 48 89 e5 41 55 41 54 53 e8 82 78 a7 fc e8 5d 52 b9 fd 0f
[ 54.537476][ T0] RSP: 0018:ffffc90000cd3e48 EFLAGS: 00000282 ORIG_RAX: ffffffffffffffd9
[ 54.545995][ T0] RAX: fbe76c8b43963d9a RBX: 0000000000000001 RCX: 00000000000007b8
[ 54.554145][ T0] RDX: 0000000000a3aa70 RSI: 020c49ba5e353f7d RDI: ffffffff85a55a28
[ 54.562736][ T0] RBP: ffffc90000cd3e80 R08: 0000000000000000 R09: 0000ffff85a55a2f
[ 54.570712][ T0] R10: 00000000aaaaaaab R11: ffffffff86042cc0 R12: ffff88812b38f0c0
[ 54.578775][ T0] R13: ffff88812b38f0c0 R14: 0000000000000000 R15: 0000000000000000
[ 54.586769][ T0] ? default_idle+0x50/0x230
[ 54.591360][ T0] arch_cpu_idle+0x1f/0x30
[ 54.595775][ T0] default_idle_call+0x1e/0x40
[ 54.600540][ T0] do_idle+0x1ea/0x2c0
[ 54.604602][ T0] cpu_startup_entry+0x1b/0x20
[ 54.609370][ T0] start_secondary+0x207/0x260
[ 54.614146][ T0] secondary_startup_64+0xa4/0xb0
[ 54.621158][ T0] Kernel Offset: disabled
[ 54.625487][ T0] Rebooting in 86400 seconds..