[ 53.245980][ T25] audit: type=1800 audit(1573143989.998:25): pid=8026 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0 [ 53.288715][ T25] audit: type=1800 audit(1573143989.998:26): pid=8026 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 [ 53.340032][ T25] audit: type=1800 audit(1573143989.998:27): pid=8026 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. [ 53.901081][ T8090] sshd (8090) used greatest stack depth: 10128 bytes left [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.120' (ECDSA) to the list of known hosts. 2019/11/07 16:26:42 fuzzer started 2019/11/07 16:26:44 dialing manager at 10.128.0.105:38105 2019/11/07 16:26:45 syscalls: 2553 2019/11/07 16:26:45 code coverage: enabled 2019/11/07 16:26:45 comparison tracing: enabled 2019/11/07 16:26:45 extra coverage: extra coverage is not supported by the kernel 2019/11/07 16:26:45 setuid sandbox: enabled 2019/11/07 16:26:45 namespace sandbox: enabled 2019/11/07 16:26:45 Android sandbox: /sys/fs/selinux/policy does not exist 2019/11/07 16:26:45 fault injection: enabled 2019/11/07 16:26:45 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/11/07 16:26:45 net packet injection: enabled 2019/11/07 16:26:45 net device setup: enabled 2019/11/07 16:26:45 concurrency sanitizer: enabled 2019/11/07 16:26:45 devlink PCI setup: PCI device 0000:00:10.0 is not available syzkaller login: [ 71.658911][ T8193] KCSAN: could not find function: 'poll_schedule_timeout' 2019/11/07 16:26:51 adding functions to KCSAN blacklist: '__skb_try_recv_from_queue' 'tick_sched_do_timer' 'add_timer' 'generic_fillattr' 'taskstats_exit' 'ep_poll' 'generic_write_end' '__rb_insert_augmented' 'blk_mq_dispatch_rq_list' 'blk_mq_run_hw_queue' 'rcu_gp_fqs_check_wake' 'mod_timer' '__hrtimer_run_queues' 'poll_schedule_timeout' 'tick_do_update_jiffies64' 'n_tty_receive_buf_common' 'pipe_poll' 'ext4_free_inode' 'blk_mq_get_request' 'tick_nohz_next_event' '__ext4_new_inode' 'tcp_add_backlog' 'tomoyo_supervisor' 'generic_permission' 'ktime_get_real_seconds' 'ext4_has_free_clusters' 'do_exit' 'find_next_bit' 'run_timer_softirq' 'ext4_nonda_switch' 'find_get_pages_range_tag' 'common_perm_cond' 'pid_update_inode' 'do_nanosleep' 'wbt_done' 'lruvec_lru_size' [ 76.270854][ T8195] ================================================================== [ 76.279464][ T8195] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 76.287813][ T8195] [ 76.290168][ T8195] write to 0xffffffff86041b08 of 280 bytes by interrupt on cpu 1: [ 76.298272][ T8195] timekeeping_advance+0x88e/0xd80 [ 76.303512][ T8195] update_wall_time+0x19/0x20 [ 76.309132][ T8195] tick_do_update_jiffies64+0x1a4/0x250 [ 76.319372][ T8195] tick_sched_do_timer+0xd4/0xe0 [ 76.324460][ T8195] tick_sched_timer+0x43/0xe0 [ 76.331177][ T8195] __hrtimer_run_queues+0x274/0x5f0 [ 76.340143][ T8195] hrtimer_interrupt+0x22a/0x480 [ 76.345334][ T8195] smp_apic_timer_interrupt+0xdc/0x280 [ 76.350819][ T8195] apic_timer_interrupt+0xf/0x20 [ 76.356548][ T8195] __tsan_read2+0xd6/0x1f0 [ 76.361267][ T8195] virtqueue_add+0x8a0/0x1a80 [ 76.366129][ T8195] virtqueue_add_inbuf_ctx+0x50/0x6a [ 76.372135][ T8195] try_fill_recv+0x67d/0xda0 [ 76.376841][ T8195] virtnet_poll+0x64c/0x7d0 [ 76.382002][ T8195] net_rx_action+0x3ae/0xa90 [ 76.388246][ T8195] __do_softirq+0x115/0x33f [ 76.394771][ T8195] run_ksoftirqd+0x46/0x60 [ 76.400152][ T8195] smpboot_thread_fn+0x37d/0x4a0 [ 76.405218][ T8195] kthread+0x1d4/0x200 [ 76.409363][ T8195] ret_from_fork+0x1f/0x30 [ 76.414412][ T8195] [ 76.416821][ T8195] read to 0xffffffff86041b80 of 8 bytes by task 8195 on cpu 0: [ 76.424369][ T8195] ktime_get_seconds+0x45/0x70 [ 76.429118][ T8195] tcp_rcv_established+0xeeb/0xf50 [ 76.434226][ T8195] tcp_v4_do_rcv+0x3b5/0x520 [ 76.438841][ T8195] __release_sock+0x135/0x1e0 [ 76.444210][ T8195] release_sock+0x61/0x160 [ 76.448674][ T8195] tcp_recvmsg+0x653/0x1b40 [ 76.453187][ T8195] inet_recvmsg+0xbb/0x250 [ 76.457617][ T8195] sock_recvmsg+0x92/0xb0 [ 76.462043][ T8195] sock_read_iter+0x15f/0x1e0 [ 76.470188][ T8195] new_sync_read+0x389/0x4f0 [ 76.475979][ T8195] __vfs_read+0xb1/0xc0 [ 76.480276][ T8195] vfs_read+0x143/0x2c0 [ 76.488400][ T8195] ksys_read+0xd5/0x1b0 [ 76.493705][ T8195] __x64_sys_read+0x4c/0x60 [ 76.498785][ T8195] do_syscall_64+0xcc/0x370 [ 76.504614][ T8195] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 76.514918][ T8195] [ 76.518581][ T8195] Reported by Kernel Concurrency Sanitizer on: [ 76.525301][ T8195] CPU: 0 PID: 8195 Comm: syz-fuzzer Not tainted 5.4.0-rc6+ #0 [ 76.533670][ T8195] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.545209][ T8195] ================================================================== [ 76.553632][ T8195] Kernel panic - not syncing: panic_on_warn set ... [ 76.562672][ T8195] CPU: 0 PID: 8195 Comm: syz-fuzzer Not tainted 5.4.0-rc6+ #0 [ 76.572673][ T8195] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.586890][ T8195] Call Trace: [ 76.590226][ T8195] dump_stack+0xf5/0x159 [ 76.596178][ T8195] panic+0x210/0x640 [ 76.601764][ T8195] ? vprintk_func+0x8d/0x140 [ 76.608230][ T8195] kcsan_report.cold+0xc/0xe [ 76.613878][ T8195] kcsan_setup_watchpoint+0x3fe/0x410 [ 76.619396][ T8195] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 76.626828][ T8195] __tsan_read8+0x145/0x1f0 [ 76.632535][ T8195] ktime_get_seconds+0x45/0x70 [ 76.638701][ T8195] tcp_rcv_established+0xeeb/0xf50 [ 76.644884][ T8195] ? ipv4_dst_check+0xc6/0xf0 [ 76.650240][ T8195] tcp_v4_do_rcv+0x3b5/0x520 [ 76.655214][ T8195] __release_sock+0x135/0x1e0 [ 76.660331][ T8195] release_sock+0x61/0x160 [ 76.664752][ T8195] tcp_recvmsg+0x653/0x1b40 [ 76.669264][ T8195] inet_recvmsg+0xbb/0x250 [ 76.673662][ T8195] ? apparmor_socket_recvmsg+0x3b/0x50 [ 76.679109][ T8195] ? security_socket_recvmsg+0x92/0xb0 [ 76.684552][ T8195] ? inet_sendpage+0x100/0x100 [ 76.689318][ T8195] sock_recvmsg+0x92/0xb0 [ 76.693634][ T8195] sock_read_iter+0x15f/0x1e0 [ 76.698306][ T8195] new_sync_read+0x389/0x4f0 [ 76.703185][ T8195] __vfs_read+0xb1/0xc0 [ 76.708370][ T8195] vfs_read+0x143/0x2c0 [ 76.713297][ T8195] ksys_read+0xd5/0x1b0 [ 76.717921][ T8195] __x64_sys_read+0x4c/0x60 [ 76.722660][ T8195] do_syscall_64+0xcc/0x370 [ 76.727159][ T8195] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 76.733802][ T8195] RIP: 0033:0x47c530 [ 76.738281][ T8195] 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 [ 76.760559][ T8195] RSP: 002b:000000c4203e17d8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 76.768957][ T8195] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 76.776908][ T8195] RDX: 0000000000001000 RSI: 000000c420052000 RDI: 0000000000000003 [ 76.784947][ T8195] RBP: 000000c4203e1830 R08: 0000000000000000 R09: 0000000000000000 [ 76.792899][ T8195] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000200 [ 76.801508][ T8195] R13: ffffffffffffffff R14: 0000000000000004 R15: ffffffffffffffff [ 76.811246][ T8195] Kernel Offset: disabled [ 76.815577][ T8195] Rebooting in 86400 seconds..