[ 34.458011][ T26] audit: type=1800 audit(1571905223.284:25): pid=7053 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0 [ 34.478194][ T26] audit: type=1800 audit(1571905223.284:26): pid=7053 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 [ 34.499949][ T26] audit: type=1800 audit(1571905223.284:27): pid=7053 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[ ok 8[?25h[?0c. [ 35.088127][ T7116] sshd (7116) used greatest stack depth: 10136 bytes left [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.28' (ECDSA) to the list of known hosts. 2019/10/24 08:20:35 fuzzer started 2019/10/24 08:20:37 dialing manager at 10.128.0.105:42135 2019/10/24 08:20:39 syscalls: 2524 2019/10/24 08:20:39 code coverage: enabled 2019/10/24 08:20:39 comparison tracing: enabled 2019/10/24 08:20:39 extra coverage: extra coverage is not supported by the kernel 2019/10/24 08:20:39 setuid sandbox: enabled 2019/10/24 08:20:39 namespace sandbox: enabled 2019/10/24 08:20:39 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/24 08:20:39 fault injection: enabled 2019/10/24 08:20:39 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/10/24 08:20:39 net packet injection: enabled 2019/10/24 08:20:39 net device setup: enabled 2019/10/24 08:20:39 concurrency sanitizer: enabled syzkaller login: [ 52.407482][ T7218] KCSAN: could not find function: 'poll_schedule_timeout' 2019/10/24 08:20:48 adding functions to KCSAN blacklist: 'rcu_gp_fqs_check_wake' 'mod_timer' 'ext4_nonda_switch' 'ep_poll' 'tcp_poll' 'find_get_pages_range_tag' 'tick_sched_do_timer' 'get_task_cred' 'add_timer' 'poll_schedule_timeout' 'run_timer_softirq' 'ext4_da_write_end' '__hrtimer_run_queues' 'generic_permission' '__nf_ct_refresh_acct' 'xas_find_marked' 'add_timer_on' '__alloc_file' 'generic_write_end' 'pipe_poll' 'sk_wait_data' 'generic_fillattr' 'wbt_issue' 'tomoyo_supervisor' 'vm_area_dup' '__ext4_new_inode' 'padata_find_next' 'blk_mq_get_request' 'rcu_gp_fqs_loop' 'do_nanosleep' 'blk_mq_sched_dispatch_requests' 'dd_has_work' '__splice_from_pipe' 'find_next_bit' 'ktime_get_real_seconds' 'taskstats_exit' 'ext4_free_inode' 'process_srcu' 'update_defense_level' 'pid_update_inode' 'blk_mq_dispatch_rq_list' 'tick_do_update_jiffies64' '__tcp_select_window' 'tcp_add_backlog' [ 103.065621][ T7203] ================================================================== [ 103.073769][ T7203] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 103.081660][ T7203] [ 103.083989][ T7203] write to 0xffffffff86040b08 of 280 bytes by interrupt on cpu 0: [ 103.091826][ T7203] timekeeping_advance+0x893/0xd80 [ 103.096944][ T7203] update_wall_time+0x19/0x20 [ 103.101620][ T7203] tick_do_update_jiffies64+0x1ae/0x260 [ 103.107169][ T7203] tick_sched_do_timer+0xd4/0xe0 [ 103.112120][ T7203] tick_sched_timer+0x43/0xe0 [ 103.116797][ T7203] __hrtimer_run_queues+0x288/0x600 [ 103.122006][ T7203] hrtimer_interrupt+0x22a/0x480 [ 103.126940][ T7203] smp_apic_timer_interrupt+0xdc/0x280 [ 103.132395][ T7203] apic_timer_interrupt+0xf/0x20 [ 103.137328][ T7203] __kcsan_check_watchpoint+0x26/0x180 [ 103.142778][ T7203] __tsan_read4+0x15/0x30 [ 103.147107][ T7203] nf_conntrack_tcp_packet+0x1f8c/0x3390 [ 103.152751][ T7203] nf_conntrack_in+0x410/0xa80 [ 103.157507][ T7203] ipv4_conntrack_in+0x27/0x40 [ 103.162252][ T7203] [ 103.164581][ T7203] read to 0xffffffff86040b80 of 8 bytes by task 7203 on cpu 1: [ 103.172118][ T7203] ktime_get_seconds+0x45/0x70 [ 103.176879][ T7203] tcp_rcv_established+0xeeb/0xf50 [ 103.181981][ T7203] tcp_v4_do_rcv+0x381/0x4e0 [ 103.187440][ T7203] __release_sock+0x135/0x1e0 [ 103.192111][ T7203] release_sock+0x61/0x160 [ 103.196525][ T7203] tcp_recvmsg+0x63b/0x1a30 [ 103.201019][ T7203] inet_recvmsg+0xbb/0x250 [ 103.205432][ T7203] sock_recvmsg+0x92/0xb0 [ 103.209754][ T7203] sock_read_iter+0x15f/0x1e0 [ 103.214423][ T7203] new_sync_read+0x389/0x4f0 [ 103.219008][ T7203] __vfs_read+0xb1/0xc0 [ 103.223329][ T7203] vfs_read+0x143/0x2c0 [ 103.227496][ T7203] ksys_read+0xd5/0x1b0 [ 103.231635][ T7203] [ 103.233948][ T7203] Reported by Kernel Concurrency Sanitizer on: [ 103.240088][ T7203] CPU: 1 PID: 7203 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #0 [ 103.247514][ T7203] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 103.257584][ T7203] ================================================================== [ 103.265658][ T7203] Kernel panic - not syncing: panic_on_warn set ... [ 103.272233][ T7203] CPU: 1 PID: 7203 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #0 [ 103.279657][ T7203] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 103.289700][ T7203] Call Trace: [ 103.293000][ T7203] dump_stack+0xf5/0x159 [ 103.297279][ T7203] panic+0x210/0x640 [ 103.301160][ T7203] ? sock_read_iter+0x15f/0x1e0 [ 103.305991][ T7203] ? vprintk_func+0x8d/0x140 [ 103.310605][ T7203] kcsan_report.cold+0xc/0x10 [ 103.315310][ T7203] __kcsan_setup_watchpoint+0x32e/0x4a0 [ 103.320840][ T7203] __tsan_read8+0x2c/0x30 [ 103.325338][ T7203] ktime_get_seconds+0x45/0x70 [ 103.330094][ T7203] tcp_rcv_established+0xeeb/0xf50 [ 103.335188][ T7203] ? ipv4_dst_check+0xc6/0xf0 [ 103.339848][ T7203] tcp_v4_do_rcv+0x381/0x4e0 [ 103.344428][ T7203] __release_sock+0x135/0x1e0 [ 103.349100][ T7203] release_sock+0x61/0x160 [ 103.353511][ T7203] tcp_recvmsg+0x63b/0x1a30 [ 103.358002][ T7203] inet_recvmsg+0xbb/0x250 [ 103.362394][ T7203] ? __tsan_read8+0x2c/0x30 [ 103.366885][ T7203] ? inet_sendpage+0x100/0x100 [ 103.371639][ T7203] sock_recvmsg+0x92/0xb0 [ 103.376135][ T7203] sock_read_iter+0x15f/0x1e0 [ 103.380852][ T7203] new_sync_read+0x389/0x4f0 [ 103.385598][ T7203] __vfs_read+0xb1/0xc0 [ 103.389740][ T7203] vfs_read+0x143/0x2c0 [ 103.393885][ T7203] ksys_read+0xd5/0x1b0 [ 103.398038][ T7203] __x64_sys_read+0x4c/0x60 [ 103.402543][ T7203] do_syscall_64+0xcc/0x370 [ 103.407049][ T7203] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 103.412937][ T7203] RIP: 0033:0x47c530 [ 103.416826][ T7203] 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 [ 103.436559][ T7203] RSP: 002b:000000c4202f17d8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 103.444987][ T7203] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 103.452937][ T7203] RDX: 0000000000001000 RSI: 000000c4203ea000 RDI: 0000000000000003 [ 103.460891][ T7203] RBP: 000000c4202f1830 R08: 0000000000000000 R09: 0000000000000000 [ 103.468841][ T7203] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000010 [ 103.476824][ T7203] R13: ffffffffffffffff R14: 0000000000000002 R15: ffffffffffffffff [ 103.486390][ T7203] Kernel Offset: disabled [ 103.490712][ T7203] Rebooting in 86400 seconds..