Warning: Permanently added '10.128.0.4' (ECDSA) to the list of known hosts.
2019/10/04 12:36:04 fuzzer started
2019/10/04 12:36:06 dialing manager at 10.128.0.105:38119
2019/10/04 12:36:06 syscalls: 2523
2019/10/04 12:36:06 code coverage: enabled
2019/10/04 12:36:06 comparison tracing: enabled
2019/10/04 12:36:06 extra coverage: extra coverage is not supported by the kernel
2019/10/04 12:36:06 setuid sandbox: enabled
2019/10/04 12:36:06 namespace sandbox: enabled
2019/10/04 12:36:06 Android sandbox: /sys/fs/selinux/policy does not exist
2019/10/04 12:36:06 fault injection: enabled
2019/10/04 12:36:06 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/10/04 12:36:06 net packet injection: enabled
2019/10/04 12:36:06 net device setup: enabled
2019/10/04 12:36:06 concurrency sanitizer: enabled
syzkaller login: [   49.517537][ T7379] ==================================================================
[   49.526992][ T7379] BUG: KCSAN: data-race in tcp_add_backlog+0x4a0/0xcc0 and tcp_grow_window.isra.0+0x6b/0x480
[   49.537239][ T7379] 
[   49.539546][ T7379] write to 0xffff888126a512ec of 4 bytes by interrupt on cpu 0:
[   49.547149][ T7379]  tcp_add_backlog+0x4a0/0xcc0
[   49.551888][ T7379]  tcp_v4_rcv+0x1aba/0x1bf0
[   49.556366][ T7379]  ip_protocol_deliver_rcu+0x51/0x470
[   49.561726][ T7379]  ip_local_deliver_finish+0x110/0x140
[   49.567159][ T7379]  ip_local_deliver+0x133/0x210
[   49.571983][ T7379]  ip_rcv_finish+0x121/0x160
[   49.576569][ T7379]  ip_rcv+0x18f/0x1a0
[   49.580529][ T7379]  __netif_receive_skb_one_core+0xa7/0xe0
[   49.586226][ T7379]  __netif_receive_skb+0x37/0xf0
[   49.591135][ T7379]  netif_receive_skb_internal+0x59/0x190
[   49.596742][ T7379]  napi_gro_receive+0x28f/0x330
[   49.601576][ T7379]  receive_buf+0x284/0x30b0
[   49.606055][ T7379]  virtnet_poll+0x436/0x7d0
[   49.610975][ T7379]  net_rx_action+0x3ae/0xa50
[   49.615532][ T7379] 
[   49.617837][ T7379] read to 0xffff888126a512ec of 4 bytes by task 7379 on cpu 1:
[   49.625368][ T7379]  tcp_grow_window.isra.0+0x6b/0x480
[   49.630656][ T7379]  tcp_event_data_recv+0x68f/0x990
[   49.635754][ T7379]  tcp_rcv_established+0xbfe/0xf50
[   49.640840][ T7379]  tcp_v4_do_rcv+0x381/0x4e0
[   49.645405][ T7379]  __release_sock+0x135/0x1e0
[   49.650058][ T7379]  release_sock+0x61/0x160
[   49.654461][ T7379]  tcp_recvmsg+0x63b/0x1a30
[   49.658938][ T7379]  inet_recvmsg+0xbb/0x250
[   49.663326][ T7379]  sock_recvmsg+0x92/0xb0
[   49.667645][ T7379]  sock_read_iter+0x15f/0x1e0
[   49.672298][ T7379]  new_sync_read+0x389/0x4f0
[   49.676862][ T7379]  __vfs_read+0xb1/0xc0
[   49.681010][ T7379]  vfs_read+0x143/0x2c0
[   49.685134][ T7379] 
[   49.687446][ T7379] Reported by Kernel Concurrency Sanitizer on:
[   49.693587][ T7379] CPU: 1 PID: 7379 Comm: syz-fuzzer Not tainted 5.3.0+ #0
[   49.700671][ T7379] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   49.710700][ T7379] ==================================================================
[   49.718735][ T7379] Kernel panic - not syncing: panic_on_warn set ...
[   49.725297][ T7379] CPU: 1 PID: 7379 Comm: syz-fuzzer Not tainted 5.3.0+ #0
[   49.732387][ T7379] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   49.742420][ T7379] Call Trace:
[   49.745704][ T7379]  dump_stack+0xf5/0x159
[   49.749930][ T7379]  panic+0x209/0x639
[   49.753802][ T7379]  ? vprintk_func+0x8d/0x140
[   49.758371][ T7379]  kcsan_report.cold+0x57/0xeb
[   49.763183][ T7379]  __kcsan_setup_watchpoint+0x342/0x500
[   49.768726][ T7379]  __tsan_read4+0x2c/0x30
[   49.773042][ T7379]  tcp_grow_window.isra.0+0x6b/0x480
[   49.778325][ T7379]  tcp_event_data_recv+0x68f/0x990
[   49.783433][ T7379]  tcp_rcv_established+0xbfe/0xf50
[   49.788538][ T7379]  ? ipv4_dst_check+0xc6/0xf0
[   49.793206][ T7379]  tcp_v4_do_rcv+0x381/0x4e0
[   49.797776][ T7379]  __release_sock+0x135/0x1e0
[   49.802433][ T7379]  release_sock+0x61/0x160
[   49.806835][ T7379]  tcp_recvmsg+0x63b/0x1a30
[   49.811325][ T7379]  inet_recvmsg+0xbb/0x250
[   49.816951][ T7379]  ? __tsan_read8+0x2c/0x30
[   49.821449][ T7379]  ? inet_sendpage+0x100/0x100
[   49.826215][ T7379]  sock_recvmsg+0x92/0xb0
[   49.830529][ T7379]  sock_read_iter+0x15f/0x1e0
[   49.835203][ T7379]  new_sync_read+0x389/0x4f0
[   49.839795][ T7379]  __vfs_read+0xb1/0xc0
[   49.844029][ T7379]  vfs_read+0x143/0x2c0
[   49.848163][ T7379]  ksys_read+0xd5/0x1b0
[   49.852295][ T7379]  __x64_sys_read+0x4c/0x60
[   49.857042][ T7379]  do_syscall_64+0xcf/0x2f0
[   49.861529][ T7379]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   49.867407][ T7379] RIP: 0033:0x47c530
[   49.871285][ T7379] 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
[   49.890875][ T7379] RSP: 002b:000000c4202d57d8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000
[   49.899273][ T7379] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530
[   49.907222][ T7379] RDX: 0000000000001000 RSI: 000000c4200ac000 RDI: 0000000000000003
[   49.915167][ T7379] RBP: 000000c4202d5830 R08: 0000000000000000 R09: 0000000000000000
[   49.923114][ T7379] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000020
[   49.931062][ T7379] R13: ffffffffffffffff R14: 0000000000000004 R15: ffffffffffffffff
[   49.940398][ T7379] Kernel Offset: disabled
[   49.944729][ T7379] Rebooting in 86400 seconds..