Warning: Permanently added '10.128.0.175' (ECDSA) to the list of known hosts.
2019/10/22 15:48:12 fuzzer started
2019/10/22 15:48:14 dialing manager at 10.128.0.105:33369
2019/10/22 15:48:14 syscalls: 2524
2019/10/22 15:48:14 code coverage: enabled
2019/10/22 15:48:14 comparison tracing: enabled
2019/10/22 15:48:14 extra coverage: extra coverage is not supported by the kernel
2019/10/22 15:48:14 setuid sandbox: enabled
2019/10/22 15:48:14 namespace sandbox: enabled
2019/10/22 15:48:14 Android sandbox: /sys/fs/selinux/policy does not exist
2019/10/22 15:48:14 fault injection: enabled
2019/10/22 15:48:14 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/10/22 15:48:14 net packet injection: enabled
2019/10/22 15:48:14 net device setup: enabled
2019/10/22 15:48:14 concurrency sanitizer: enabled
syzkaller login: [   54.471671][ T7283] ==================================================================
[   54.479925][ T7283] BUG: KCSAN: data-race in tcp_add_backlog / tcp_grow_window.isra.0
[   54.487882][ T7283] 
[   54.490730][ T7283] write to 0xffff888121106a2c of 4 bytes by interrupt on cpu 1:
[   54.498383][ T7283]  tcp_add_backlog+0xb91/0xcc0
[   54.503150][ T7283]  tcp_v4_rcv+0x1a60/0x1bb0
[   54.507798][ T7283]  ip_protocol_deliver_rcu+0x4d/0x420
[   54.513269][ T7283]  ip_local_deliver_finish+0x110/0x140
[   54.518808][ T7283]  ip_local_deliver+0x133/0x210
[   54.523635][ T7283]  ip_rcv_finish+0x121/0x160
[   54.528235][ T7283]  ip_rcv+0x18f/0x1a0
[   54.532209][ T7283]  __netif_receive_skb_one_core+0xa7/0xe0
[   54.537904][ T7283]  __netif_receive_skb+0x37/0xf0
[   54.542840][ T7283]  netif_receive_skb_internal+0x59/0x190
[   54.548810][ T7283]  napi_gro_receive+0x28f/0x330
[   54.553654][ T7283]  receive_buf+0x284/0x30b0
[   54.558158][ T7283]  virtnet_poll+0x436/0x7d0
[   54.562646][ T7283]  net_rx_action+0x3ae/0xa90
[   54.567227][ T7283] 
[   54.569556][ T7283] read to 0xffff888121106a2c of 4 bytes by task 7283 on cpu 0:
[   54.577095][ T7283]  tcp_grow_window.isra.0+0x6b/0x480
[   54.582477][ T7283]  tcp_event_data_recv+0x68f/0x990
[   54.587657][ T7283]  tcp_rcv_established+0xbfe/0xf50
[   54.592771][ T7283]  tcp_v4_do_rcv+0x381/0x4e0
[   54.597428][ T7283]  __release_sock+0x135/0x1e0
[   54.602171][ T7283]  release_sock+0x61/0x160
[   54.606576][ T7283]  tcp_recvmsg+0x63b/0x1a30
[   54.611413][ T7283]  inet_recvmsg+0xbb/0x250
[   54.615814][ T7283]  sock_recvmsg+0x92/0xb0
[   54.620960][ T7283]  sock_read_iter+0x15f/0x1e0
[   54.625623][ T7283]  new_sync_read+0x389/0x4f0
[   54.630358][ T7283]  __vfs_read+0xb1/0xc0
[   54.634530][ T7283]  vfs_read+0x143/0x2c0
[   54.638675][ T7283] 
[   54.641049][ T7283] Reported by Kernel Concurrency Sanitizer on:
[   54.647195][ T7283] CPU: 0 PID: 7283 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #0
[   54.654749][ T7283] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   54.664885][ T7283] ==================================================================
[   54.673197][ T7283] Kernel panic - not syncing: panic_on_warn set ...
[   54.679769][ T7283] CPU: 0 PID: 7283 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #0
[   54.687199][ T7283] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   54.697444][ T7283] Call Trace:
[   54.700731][ T7283]  dump_stack+0xf5/0x159
[   54.704961][ T7283]  panic+0x210/0x640
[   54.708847][ T7283]  ? sock_recvmsg+0x92/0xb0
[   54.713327][ T7283]  ? vprintk_func+0x8d/0x140
[   54.718783][ T7283]  kcsan_report.cold+0xc/0x10
[   54.723439][ T7283]  __kcsan_setup_watchpoint+0x32e/0x4a0
[   54.728970][ T7283]  __tsan_read4+0x2c/0x30
[   54.733327][ T7283]  tcp_grow_window.isra.0+0x6b/0x480
[   54.738683][ T7283]  ? __kcsan_setup_watchpoint+0x6b/0x4a0
[   54.744306][ T7283]  tcp_event_data_recv+0x68f/0x990
[   54.749747][ T7283]  tcp_rcv_established+0xbfe/0xf50
[   54.754842][ T7283]  ? ipv4_dst_check+0xc6/0xf0
[   54.759598][ T7283]  tcp_v4_do_rcv+0x381/0x4e0
[   54.764276][ T7283]  __release_sock+0x135/0x1e0
[   54.769679][ T7283]  release_sock+0x61/0x160
[   54.774094][ T7283]  tcp_recvmsg+0x63b/0x1a30
[   54.778607][ T7283]  ? debug_smp_processor_id+0x4c/0x172
[   54.784053][ T7283]  inet_recvmsg+0xbb/0x250
[   54.788545][ T7283]  ? __tsan_read8+0x2c/0x30
[   54.793076][ T7283]  ? inet_sendpage+0x100/0x100
[   54.797841][ T7283]  sock_recvmsg+0x92/0xb0
[   54.802169][ T7283]  sock_read_iter+0x15f/0x1e0
[   54.806836][ T7283]  new_sync_read+0x389/0x4f0
[   54.811418][ T7283]  __vfs_read+0xb1/0xc0
[   54.816275][ T7283]  vfs_read+0x143/0x2c0
[   54.820422][ T7283]  ksys_read+0xd5/0x1b0
[   54.824558][ T7283]  __x64_sys_read+0x4c/0x60
[   54.829043][ T7283]  do_syscall_64+0xcc/0x370
[   54.833531][ T7283]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   54.839449][ T7283] RIP: 0033:0x47c530
[   54.843420][ T7283] 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
[   54.863254][ T7283] RSP: 002b:000000c4204e9810 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
[   54.871661][ T7283] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530
[   54.879816][ T7283] RDX: 0000000000001000 RSI: 000000c4203e0000 RDI: 0000000000000003
[   54.887782][ T7283] RBP: 000000c4204e9868 R08: 0000000000000000 R09: 0000000000000000
[   54.896884][ T7283] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000008
[   54.906142][ T7283] R13: ffffffffffffffff R14: 0000000000000010 R15: ffffffffffffffff
[   54.915419][ T7283] Kernel Offset: disabled
[   54.919757][ T7283] Rebooting in 86400 seconds..