Warning: Permanently added '10.128.1.2' (ECDSA) to the list of known hosts.
2019/10/04 12:15:22 fuzzer started
2019/10/04 12:15:23 dialing manager at 10.128.0.105:38119
2019/10/04 12:15:23 syscalls: 2523
2019/10/04 12:15:23 code coverage: enabled
2019/10/04 12:15:23 comparison tracing: enabled
2019/10/04 12:15:23 extra coverage: extra coverage is not supported by the kernel
2019/10/04 12:15:23 setuid sandbox: enabled
2019/10/04 12:15:23 namespace sandbox: enabled
2019/10/04 12:15:23 Android sandbox: /sys/fs/selinux/policy does not exist
2019/10/04 12:15:23 fault injection: enabled
2019/10/04 12:15:23 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/10/04 12:15:23 net packet injection: enabled
2019/10/04 12:15:23 net device setup: enabled
2019/10/04 12:15:23 concurrency sanitizer: enabled
syzkaller login: [   41.906421][ T7253] ==================================================================
[   41.914990][ T7253] BUG: KCSAN: data-race in tcp_add_backlog+0x4a0/0xcc0 and tcp_grow_window.isra.0+0x6b/0x480
[   41.925242][ T7253] 
[   41.927649][ T7253] write to 0xffff8881237b2a2c of 4 bytes by interrupt on cpu 1:
[   41.935347][ T7253]  tcp_add_backlog+0x4a0/0xcc0
[   41.940509][ T7253]  tcp_v4_rcv+0x1aba/0x1bf0
[   41.945070][ T7253]  ip_protocol_deliver_rcu+0x51/0x470
[   41.950425][ T7253]  ip_local_deliver_finish+0x110/0x140
[   41.955901][ T7253]  ip_local_deliver+0x133/0x210
[   41.960782][ T7253]  ip_rcv_finish+0x121/0x160
[   41.965431][ T7253]  ip_rcv+0x18f/0x1a0
[   41.969536][ T7253]  __netif_receive_skb_one_core+0xa7/0xe0
[   41.975252][ T7253]  __netif_receive_skb+0x37/0xf0
[   41.980385][ T7253]  netif_receive_skb_internal+0x59/0x190
[   41.986091][ T7253]  napi_gro_receive+0x28f/0x330
[   41.991230][ T7253]  receive_buf+0x284/0x30b0
[   41.995935][ T7253]  virtnet_poll+0x436/0x7d0
[   42.000460][ T7253]  net_rx_action+0x3ae/0xa50
[   42.005034][ T7253] 
[   42.007355][ T7253] read to 0xffff8881237b2a2c of 4 bytes by task 7253 on cpu 0:
[   42.014884][ T7253]  tcp_grow_window.isra.0+0x6b/0x480
[   42.020320][ T7253]  tcp_event_data_recv+0x68f/0x990
[   42.025417][ T7253]  tcp_rcv_established+0xbfe/0xf50
[   42.030547][ T7253]  tcp_v4_do_rcv+0x381/0x4e0
[   42.035124][ T7253]  __release_sock+0x135/0x1e0
[   42.039793][ T7253]  release_sock+0x61/0x160
[   42.044197][ T7253]  tcp_recvmsg+0x63b/0x1a30
[   42.048702][ T7253]  inet_recvmsg+0xbb/0x250
[   42.053101][ T7253]  sock_recvmsg+0x92/0xb0
[   42.057442][ T7253]  sock_read_iter+0x15f/0x1e0
[   42.062166][ T7253]  new_sync_read+0x389/0x4f0
[   42.066745][ T7253]  __vfs_read+0xb1/0xc0
[   42.070925][ T7253]  vfs_read+0x143/0x2c0
[   42.075061][ T7253] 
[   42.077378][ T7253] Reported by Kernel Concurrency Sanitizer on:
[   42.083827][ T7253] CPU: 0 PID: 7253 Comm: syz-fuzzer Not tainted 5.3.0+ #0
[   42.090919][ T7253] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   42.101006][ T7253] ==================================================================
[   42.109053][ T7253] Kernel panic - not syncing: panic_on_warn set ...
[   42.115655][ T7253] CPU: 0 PID: 7253 Comm: syz-fuzzer Not tainted 5.3.0+ #0
[   42.122794][ T7253] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   42.132839][ T7253] Call Trace:
[   42.136293][ T7253]  dump_stack+0xf5/0x159
[   42.140533][ T7253]  panic+0x209/0x639
[   42.144417][ T7253]  ? vprintk_func+0x8d/0x140
[   42.149184][ T7253]  kcsan_report.cold+0x57/0xeb
[   42.153938][ T7253]  __kcsan_setup_watchpoint+0x342/0x500
[   42.159476][ T7253]  __tsan_read4+0x2c/0x30
[   42.163799][ T7253]  tcp_grow_window.isra.0+0x6b/0x480
[   42.169220][ T7253]  tcp_event_data_recv+0x68f/0x990
[   42.174357][ T7253]  tcp_rcv_established+0xbfe/0xf50
[   42.179809][ T7253]  ? ipv4_dst_check+0xc6/0xf0
[   42.184479][ T7253]  tcp_v4_do_rcv+0x381/0x4e0
[   42.189060][ T7253]  __release_sock+0x135/0x1e0
[   42.193728][ T7253]  release_sock+0x61/0x160
[   42.198172][ T7253]  tcp_recvmsg+0x63b/0x1a30
[   42.202759][ T7253]  inet_recvmsg+0xbb/0x250
[   42.207245][ T7253]  ? __tsan_read8+0x2c/0x30
[   42.211732][ T7253]  ? inet_sendpage+0x100/0x100
[   42.216480][ T7253]  sock_recvmsg+0x92/0xb0
[   42.220795][ T7253]  sock_read_iter+0x15f/0x1e0
[   42.225469][ T7253]  new_sync_read+0x389/0x4f0
[   42.230084][ T7253]  __vfs_read+0xb1/0xc0
[   42.234225][ T7253]  vfs_read+0x143/0x2c0
[   42.238407][ T7253]  ksys_read+0xd5/0x1b0
[   42.242550][ T7253]  __x64_sys_read+0x4c/0x60
[   42.247041][ T7253]  do_syscall_64+0xcf/0x2f0
[   42.251537][ T7253]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   42.257416][ T7253] RIP: 0033:0x47c530
[   42.261342][ T7253] 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
[   42.280967][ T7253] RSP: 002b:000000c4201f47d8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000
[   42.289371][ T7253] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530
[   42.297361][ T7253] RDX: 0000000000001000 RSI: 000000c4202c8000 RDI: 0000000000000003
[   42.305317][ T7253] RBP: 000000c4201f4830 R08: 0000000000000000 R09: 0000000000000000
[   42.313271][ T7253] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000004
[   42.321230][ T7253] R13: ffffffffffffffff R14: 0000000000000004 R15: ffffffffffffffff
[   42.330772][ T7253] Kernel Offset: disabled
[   42.335102][ T7253] Rebooting in 86400 seconds..