[[36minfo[39;49m] Using makefile-style concurrent boot in runlevel 2.
[ 46.078394][ T25] audit: type=1800 audit(1574934402.718:21): pid=7391 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0
[ 46.118359][ T25] audit: type=1800 audit(1574934402.728:22): pid=7391 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2480 res=0
[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
Debian GNU/Linux 7 syzkaller ttyS0
Warning: Permanently added '10.128.10.40' (ECDSA) to the list of known hosts.
2019/11/28 09:46:51 fuzzer started
2019/11/28 09:46:52 dialing manager at 10.128.0.105:41717
2019/11/28 09:46:52 syscalls: 2589
2019/11/28 09:46:52 code coverage: enabled
2019/11/28 09:46:52 comparison tracing: enabled
2019/11/28 09:46:52 extra coverage: extra coverage is not supported by the kernel
2019/11/28 09:46:52 setuid sandbox: enabled
2019/11/28 09:46:52 namespace sandbox: enabled
2019/11/28 09:46:52 Android sandbox: /sys/fs/selinux/policy does not exist
2019/11/28 09:46:52 fault injection: enabled
2019/11/28 09:46:52 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/11/28 09:46:52 net packet injection: enabled
2019/11/28 09:46:52 net device setup: enabled
2019/11/28 09:46:52 concurrency sanitizer: enabled
2019/11/28 09:46:52 devlink PCI setup: PCI device 0000:00:10.0 is not available
2019/11/28 09:46:52 adding functions to KCSAN blacklist: '__hrtimer_run_queues' 'vm_area_dup'
syzkaller login: [ 56.338869][ C1] ==================================================================
[ 56.347216][ C1] BUG: KCSAN: data-race in tcp_add_backlog / tcp_recvmsg
[ 56.354211][ C1]
[ 56.356521][ C1] read to 0xffff8881217ca9f8 of 8 bytes by task 7559 on cpu 0:
[ 56.364044][ C1] tcp_recvmsg+0x46e/0x1b40
[ 56.368526][ C1] inet_recvmsg+0xbb/0x250
[ 56.372926][ C1] sock_recvmsg+0x92/0xb0
[ 56.377235][ C1] sock_read_iter+0x15f/0x1e0
[ 56.381892][ C1] new_sync_read+0x389/0x4f0
[ 56.386477][ C1] __vfs_read+0xb1/0xc0
[ 56.390630][ C1] vfs_read+0x143/0x2c0
[ 56.394783][ C1] ksys_read+0xd5/0x1b0
[ 56.398919][ C1] __x64_sys_read+0x4c/0x60
[ 56.403401][ C1] do_syscall_64+0xcc/0x370
[ 56.407882][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 56.413743][ C1]
[ 56.416053][ C1] write to 0xffff8881217ca9f8 of 8 bytes by interrupt on cpu 1:
[ 56.423661][ C1] tcp_add_backlog+0x476/0xce0
[ 56.428413][ C1] tcp_v4_rcv+0x1a70/0x1bd0
[ 56.432899][ C1] ip_protocol_deliver_rcu+0x4d/0x420
[ 56.438343][ C1] ip_local_deliver_finish+0x110/0x140
[ 56.443780][ C1] ip_local_deliver+0x133/0x210
[ 56.448620][ C1] ip_rcv_finish+0x121/0x160
[ 56.453190][ C1] ip_rcv+0x18f/0x1a0
[ 56.457167][ C1] __netif_receive_skb_one_core+0xa7/0xe0
[ 56.462864][ C1] __netif_receive_skb+0x37/0xf0
[ 56.467800][ C1] netif_receive_skb_internal+0x59/0x190
[ 56.473531][ C1] napi_gro_receive+0x28f/0x330
[ 56.478373][ C1] receive_buf+0x284/0x30b0
[ 56.482874][ C1] virtnet_poll+0x436/0x7d0
[ 56.487384][ C1] net_rx_action+0x3ae/0xa90
[ 56.491980][ C1] __do_softirq+0x115/0x33f
[ 56.496473][ C1] irq_exit+0xbb/0xe0
[ 56.500579][ C1] do_IRQ+0x81/0x130
[ 56.504493][ C1] ret_from_intr+0x0/0x19
[ 56.508805][ C1] native_safe_halt+0xe/0x10
[ 56.513403][ C1] arch_cpu_idle+0xa/0x10
[ 56.517746][ C1] default_idle_call+0x1e/0x40
[ 56.522492][ C1] do_idle+0x1af/0x280
[ 56.526568][ C1] cpu_startup_entry+0x1b/0x20
[ 56.531315][ C1] start_secondary+0x168/0x1b0
[ 56.536148][ C1] secondary_startup_64+0xa4/0xb0
[ 56.541145][ C1]
[ 56.543453][ C1] Reported by Kernel Concurrency Sanitizer on:
[ 56.549590][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.4.0-syzkaller #0
[ 56.557105][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 56.567140][ C1] ==================================================================
[ 56.575190][ C1] Kernel panic - not syncing: panic_on_warn set ...
[ 56.581770][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.4.0-syzkaller #0
[ 56.589288][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 56.599317][ C1] Call Trace:
[ 56.602581][ C1]
[ 56.605422][ C1] dump_stack+0x11d/0x181
[ 56.609730][ C1] panic+0x210/0x640
[ 56.613619][ C1] ? vprintk_func+0x8d/0x140
[ 56.618191][ C1] kcsan_report.cold+0xc/0xd
[ 56.622767][ C1] kcsan_setup_watchpoint+0x3fe/0x460
[ 56.628122][ C1] __tsan_unaligned_write8+0xc4/0x100
[ 56.633478][ C1] tcp_add_backlog+0x476/0xce0
[ 56.638240][ C1] tcp_v4_rcv+0x1a70/0x1bd0
[ 56.642728][ C1] ? __read_once_size+0x41/0xe0
[ 56.647568][ C1] ip_protocol_deliver_rcu+0x4d/0x420
[ 56.652927][ C1] ip_local_deliver_finish+0x110/0x140
[ 56.658376][ C1] ip_local_deliver+0x133/0x210
[ 56.663213][ C1] ? ip_protocol_deliver_rcu+0x420/0x420
[ 56.668843][ C1] ip_rcv_finish+0x121/0x160
[ 56.673415][ C1] ip_rcv+0x18f/0x1a0
[ 56.677382][ C1] ? ip_sublist_rcv+0x5e0/0x5e0
[ 56.682232][ C1] ? ip_local_deliver+0x210/0x210
[ 56.687242][ C1] __netif_receive_skb_one_core+0xa7/0xe0
[ 56.693059][ C1] __netif_receive_skb+0x37/0xf0
[ 56.697982][ C1] netif_receive_skb_internal+0x59/0x190
[ 56.703595][ C1] napi_gro_receive+0x28f/0x330
[ 56.708441][ C1] receive_buf+0x284/0x30b0
[ 56.712943][ C1] ? __sanitizer_cov_trace_pc+0x1a/0x50
[ 56.718477][ C1] ? virtqueue_get_buf_ctx+0x4fd/0x5c0
[ 56.724085][ C1] ? virtqueue_get_buf+0x31/0x40
[ 56.729014][ C1] virtnet_poll+0x436/0x7d0
[ 56.733514][ C1] net_rx_action+0x3ae/0xa90
[ 56.738087][ C1] __do_softirq+0x115/0x33f
[ 56.742575][ C1] irq_exit+0xbb/0xe0
[ 56.746541][ C1] do_IRQ+0x81/0x130
[ 56.750416][ C1] common_interrupt+0xf/0xf
[ 56.754893][ C1]
[ 56.757812][ C1] RIP: 0010:native_safe_halt+0xe/0x10
[ 56.763171][ C1] Code: 90 90 90 90 90 90 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d 7c ad 48 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 6c ad 48 00 fb f4 90 55 48 89 e5 41 55 41 54 53 e8 42 6d 9f fc e8 7d 1a b5 fd 0f
[ 56.782756][ C1] RSP: 0018:ffffc90000cd3e70 EFLAGS: 00000286 ORIG_RAX: ffffffffffffffde
[ 56.791152][ C1] RAX: 0000000000000001 RBX: ffff88812b38b0c0 RCX: ffffffff824ee309
[ 56.799105][ C1] RDX: 0000000000000000 RSI: ffffffff824ee317 RDI: 0000000000000005
[ 56.807056][ C1] RBP: ffffc90000cd3e90 R08: ffff88812b38b0c0 R09: 0000ffff857d2168
[ 56.815007][ C1] R10: 0000000000003c00 R11: 0000ffff857d216f R12: 0000000000000001
[ 56.822970][ C1] R13: ffff88812b38b0c0 R14: 0000000000000000 R15: 0000000000000000
[ 56.830976][ C1] ? debug_smp_processor_id+0x39/0x172
[ 56.836421][ C1] ? debug_smp_processor_id+0x47/0x172
[ 56.841863][ C1] ? default_idle+0x26/0x180
[ 56.846438][ C1] arch_cpu_idle+0xa/0x10
[ 56.850746][ C1] default_idle_call+0x1e/0x40
[ 56.855491][ C1] do_idle+0x1af/0x280
[ 56.859535][ C1] ? complete+0x44/0x50
[ 56.863672][ C1] cpu_startup_entry+0x1b/0x20
[ 56.868413][ C1] start_secondary+0x168/0x1b0
[ 56.873339][ C1] secondary_startup_64+0xa4/0xb0
[ 56.880471][ C1] Kernel Offset: disabled
[ 56.884796][ C1] Rebooting in 86400 seconds..