[ 37.461320][ T26] audit: type=1800 audit(1572004366.375:25): pid=7004 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0 [ 37.488509][ T26] audit: type=1800 audit(1572004366.375:26): pid=7004 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 [ 37.534368][ T26] audit: type=1800 audit(1572004366.375:27): pid=7004 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. [ 37.843950][ T7069] sshd (7069) 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 '10.128.10.31' (ECDSA) to the list of known hosts. 2019/10/25 11:52:55 fuzzer started 2019/10/25 11:52:56 dialing manager at 10.128.0.105:33971 2019/10/25 11:52:57 syscalls: 2529 2019/10/25 11:52:57 code coverage: enabled 2019/10/25 11:52:57 comparison tracing: enabled 2019/10/25 11:52:57 extra coverage: extra coverage is not supported by the kernel 2019/10/25 11:52:57 setuid sandbox: enabled 2019/10/25 11:52:57 namespace sandbox: enabled 2019/10/25 11:52:57 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/25 11:52:57 fault injection: enabled 2019/10/25 11:52:57 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/10/25 11:52:57 net packet injection: enabled 2019/10/25 11:52:57 net device setup: enabled 2019/10/25 11:52:57 concurrency sanitizer: enabled syzkaller login: [ 52.092525][ T7167] KCSAN: could not find function: 'poll_schedule_timeout' 2019/10/25 11:53:04 adding functions to KCSAN blacklist: 'echo_char' 'mod_timer' '__alloc_file' 'do_nanosleep' 'ext4_setattr' '__nf_ct_refresh_acct' 'blk_mq_dispatch_rq_list' '__hrtimer_run_queues' 'ep_poll' 'tcp_poll' 'generic_fillattr' 'task_dump_owner' 'poll_schedule_timeout' 'tomoyo_supervisor' '__ext4_new_inode' 'ktime_get_real_seconds' 'pipe_poll' 'atime_needs_update' 'generic_permission' 'run_timer_softirq' 'ext4_free_inodes_count' 'tcp_add_backlog' 'tick_do_update_jiffies64' '__tcp_select_window' 'generic_write_end' 'pid_update_inode' 'taskstats_exit' 'tick_sched_do_timer' 'find_next_bit' 'rcu_gp_fqs_check_wake' 'update_defense_level' [ 57.841048][ T7168] ================================================================== [ 57.850055][ T7168] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 57.858053][ T7168] [ 57.860389][ T7168] write to 0xffffffff86040b08 of 280 bytes by interrupt on cpu 1: [ 57.868190][ T7168] timekeeping_advance+0x893/0xd80 [ 57.873304][ T7168] update_wall_time+0x19/0x20 [ 57.877983][ T7168] tick_do_update_jiffies64+0x1ae/0x260 [ 57.883524][ T7168] tick_sched_do_timer+0xd4/0xe0 [ 57.888462][ T7168] tick_sched_timer+0x43/0xe0 [ 57.893137][ T7168] __hrtimer_run_queues+0x288/0x600 [ 57.898328][ T7168] hrtimer_interrupt+0x22a/0x480 [ 57.903260][ T7168] smp_apic_timer_interrupt+0xdc/0x280 [ 57.908711][ T7168] apic_timer_interrupt+0xf/0x20 [ 57.913626][ T7168] __kcsan_setup_watchpoint+0x28e/0x4a0 [ 57.919144][ T7168] __tsan_read8+0x2c/0x30 [ 57.923446][ T7168] tcp_v4_rcv+0x107/0x1bb0 [ 57.927837][ T7168] ip_protocol_deliver_rcu+0x4d/0x420 [ 57.933183][ T7168] ip_local_deliver_finish+0x110/0x140 [ 57.938609][ T7168] [ 57.940916][ T7168] read to 0xffffffff86040b80 of 8 bytes by task 7168 on cpu 0: [ 57.948431][ T7168] ktime_get_seconds+0x45/0x70 [ 57.953167][ T7168] tcp_rcv_established+0xeeb/0xf50 [ 57.958264][ T7168] tcp_v4_do_rcv+0x381/0x4e0 [ 57.962828][ T7168] __release_sock+0x135/0x1e0 [ 57.967479][ T7168] release_sock+0x61/0x160 [ 57.971869][ T7168] tcp_recvmsg+0x63b/0x1a30 [ 57.976349][ T7168] inet_recvmsg+0xbb/0x250 [ 57.980738][ T7168] sock_recvmsg+0x92/0xb0 [ 57.985044][ T7168] sock_read_iter+0x15f/0x1e0 [ 57.989693][ T7168] new_sync_read+0x389/0x4f0 [ 57.994277][ T7168] __vfs_read+0xb1/0xc0 [ 57.998411][ T7168] vfs_read+0x143/0x2c0 [ 58.002544][ T7168] ksys_read+0xd5/0x1b0 [ 58.006666][ T7168] [ 58.008964][ T7168] Reported by Kernel Concurrency Sanitizer on: [ 58.015104][ T7168] CPU: 0 PID: 7168 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #0 [ 58.023136][ T7168] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.033174][ T7168] ================================================================== [ 58.041207][ T7168] Kernel panic - not syncing: panic_on_warn set ... [ 58.047766][ T7168] CPU: 0 PID: 7168 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #0 [ 58.055201][ T7168] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.065229][ T7168] Call Trace: [ 58.068495][ T7168] dump_stack+0xf5/0x159 [ 58.072724][ T7168] panic+0x210/0x640 [ 58.076596][ T7168] ? sock_read_iter+0x15f/0x1e0 [ 58.081422][ T7168] ? vprintk_func+0x8d/0x140 [ 58.086007][ T7168] kcsan_report.cold+0xc/0x10 [ 58.090661][ T7168] __kcsan_setup_watchpoint+0x32e/0x4a0 [ 58.096182][ T7168] __tsan_read8+0x2c/0x30 [ 58.100485][ T7168] ktime_get_seconds+0x45/0x70 [ 58.105234][ T7168] tcp_rcv_established+0xeeb/0xf50 [ 58.110322][ T7168] ? ipv4_dst_check+0xc6/0xf0 [ 58.114978][ T7168] tcp_v4_do_rcv+0x381/0x4e0 [ 58.119547][ T7168] __release_sock+0x135/0x1e0 [ 58.124199][ T7168] release_sock+0x61/0x160 [ 58.128593][ T7168] tcp_recvmsg+0x63b/0x1a30 [ 58.133088][ T7168] ? preempt_schedule_common+0x37/0x90 [ 58.138547][ T7168] inet_recvmsg+0xbb/0x250 [ 58.142936][ T7168] ? __tsan_read8+0x2c/0x30 [ 58.147415][ T7168] ? inet_sendpage+0x100/0x100 [ 58.152159][ T7168] sock_recvmsg+0x92/0xb0 [ 58.156467][ T7168] sock_read_iter+0x15f/0x1e0 [ 58.161142][ T7168] new_sync_read+0x389/0x4f0 [ 58.165713][ T7168] __vfs_read+0xb1/0xc0 [ 58.169845][ T7168] vfs_read+0x143/0x2c0 [ 58.173983][ T7168] ksys_read+0xd5/0x1b0 [ 58.178117][ T7168] __x64_sys_read+0x4c/0x60 [ 58.182599][ T7168] do_syscall_64+0xcc/0x370 [ 58.187078][ T7168] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 58.192942][ T7168] RIP: 0033:0x47c530 [ 58.196814][ T7168] 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 [ 58.217782][ T7168] RSP: 002b:000000c4202db7d8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 58.226174][ T7168] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 58.234122][ T7168] RDX: 0000000000001000 RSI: 000000c42030a000 RDI: 0000000000000003 [ 58.242079][ T7168] RBP: 000000c4202db830 R08: 0000000000000000 R09: 0000000000000000 [ 58.250023][ T7168] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000004 [ 58.257971][ T7168] R13: ffffffffffffffff R14: 0000000000000002 R15: ffffffffffffffff [ 58.267236][ T7168] Kernel Offset: disabled [ 58.271556][ T7168] Rebooting in 86400 seconds..