Warning: Permanently added '10.128.0.87' (ECDSA) to the list of known hosts.
2019/10/23 01:34:54 fuzzer started
2019/10/23 01:34:56 dialing manager at 10.128.0.105:33369
2019/10/23 01:34:56 syscalls: 2524
2019/10/23 01:34:56 code coverage: enabled
2019/10/23 01:34:56 comparison tracing: enabled
2019/10/23 01:34:56 extra coverage: extra coverage is not supported by the kernel
2019/10/23 01:34:56 setuid sandbox: enabled
2019/10/23 01:34:56 namespace sandbox: enabled
2019/10/23 01:34:56 Android sandbox: /sys/fs/selinux/policy does not exist
2019/10/23 01:34:56 fault injection: enabled
2019/10/23 01:34:56 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/10/23 01:34:56 net packet injection: enabled
2019/10/23 01:34:56 net device setup: enabled
2019/10/23 01:34:56 concurrency sanitizer: enabled
syzkaller login: [   49.086773][ T7220] ==================================================================
[   49.095053][ T7220] BUG: KCSAN: data-race in tcp_add_backlog / tcp_grow_window.isra.0
[   49.103005][ T7220] 
[   49.105412][ T7220] write to 0xffff8881218e72ec of 4 bytes by interrupt on cpu 0:
[   49.113034][ T7220]  tcp_add_backlog+0x4a0/0xcc0
[   49.117907][ T7220]  tcp_v4_rcv+0x1a60/0x1bb0
[   49.122392][ T7220]  ip_protocol_deliver_rcu+0x4d/0x420
[   49.127739][ T7220]  ip_local_deliver_finish+0x110/0x140
[   49.133173][ T7220]  ip_local_deliver+0x133/0x210
[   49.137998][ T7220]  ip_rcv_finish+0x121/0x160
[   49.142581][ T7220]  ip_rcv+0x18f/0x1a0
[   49.146540][ T7220]  __netif_receive_skb_one_core+0xa7/0xe0
[   49.152237][ T7220]  __netif_receive_skb+0x37/0xf0
[   49.157189][ T7220]  netif_receive_skb_internal+0x59/0x190
[   49.162795][ T7220]  napi_gro_receive+0x28f/0x330
[   49.167621][ T7220]  receive_buf+0x284/0x30b0
[   49.172106][ T7220]  virtnet_poll+0x436/0x7d0
[   49.176585][ T7220]  net_rx_action+0x3ae/0xa90
[   49.181151][ T7220] 
[   49.183458][ T7220] read to 0xffff8881218e72ec of 4 bytes by task 7220 on cpu 1:
[   49.190985][ T7220]  tcp_grow_window.isra.0+0x6b/0x480
[   49.196242][ T7220]  tcp_event_data_recv+0x68f/0x990
[   49.201326][ T7220]  tcp_rcv_established+0xbfe/0xf50
[   49.206413][ T7220]  tcp_v4_do_rcv+0x381/0x4e0
[   49.210977][ T7220]  __release_sock+0x135/0x1e0
[   49.215628][ T7220]  release_sock+0x61/0x160
[   49.220019][ T7220]  tcp_recvmsg+0x63b/0x1a30
[   49.224493][ T7220]  inet_recvmsg+0xbb/0x250
[   49.228890][ T7220]  sock_recvmsg+0x92/0xb0
[   49.233203][ T7220]  sock_read_iter+0x15f/0x1e0
[   49.237860][ T7220]  new_sync_read+0x389/0x4f0
[   49.242426][ T7220]  __vfs_read+0xb1/0xc0
[   49.246555][ T7220]  vfs_read+0x143/0x2c0
[   49.250681][ T7220] 
[   49.252980][ T7220] Reported by Kernel Concurrency Sanitizer on:
[   49.259115][ T7220] CPU: 1 PID: 7220 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #0
[   49.266575][ T7220] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   49.276609][ T7220] ==================================================================
[   49.284668][ T7220] Kernel panic - not syncing: panic_on_warn set ...
[   49.291256][ T7220] CPU: 1 PID: 7220 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #0
[   49.298707][ T7220] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   49.308746][ T7220] Call Trace:
[   49.312018][ T7220]  dump_stack+0xf5/0x159
[   49.316240][ T7220]  panic+0x210/0x640
[   49.320124][ T7220]  ? sock_recvmsg+0x92/0xb0
[   49.324603][ T7220]  ? vprintk_func+0x8d/0x140
[   49.329172][ T7220]  kcsan_report.cold+0xc/0x10
[   49.333827][ T7220]  __kcsan_setup_watchpoint+0x32e/0x4a0
[   49.339348][ T7220]  __tsan_read4+0x2c/0x30
[   49.343653][ T7220]  tcp_grow_window.isra.0+0x6b/0x480
[   49.348912][ T7220]  ? __kcsan_setup_watchpoint+0x6b/0x4a0
[   49.354521][ T7220]  tcp_event_data_recv+0x68f/0x990
[   49.359624][ T7220]  tcp_rcv_established+0xbfe/0xf50
[   49.364712][ T7220]  ? ipv4_dst_check+0xc6/0xf0
[   49.369369][ T7220]  tcp_v4_do_rcv+0x381/0x4e0
[   49.373937][ T7220]  __release_sock+0x135/0x1e0
[   49.378595][ T7220]  release_sock+0x61/0x160
[   49.383098][ T7220]  tcp_recvmsg+0x63b/0x1a30
[   49.387608][ T7220]  inet_recvmsg+0xbb/0x250
[   49.392006][ T7220]  ? __tsan_read8+0x2c/0x30
[   49.396490][ T7220]  ? inet_sendpage+0x100/0x100
[   49.401266][ T7220]  sock_recvmsg+0x92/0xb0
[   49.405574][ T7220]  sock_read_iter+0x15f/0x1e0
[   49.410237][ T7220]  new_sync_read+0x389/0x4f0
[   49.414812][ T7220]  __vfs_read+0xb1/0xc0
[   49.418956][ T7220]  vfs_read+0x143/0x2c0
[   49.423103][ T7220]  ksys_read+0xd5/0x1b0
[   49.427278][ T7220]  __x64_sys_read+0x4c/0x60
[   49.431760][ T7220]  do_syscall_64+0xcc/0x370
[   49.436246][ T7220]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   49.442121][ T7220] RIP: 0033:0x47c530
[   49.446030][ T7220] 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
[   49.465645][ T7220] RSP: 002b:000000c4201677d8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000
[   49.474033][ T7220] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530
[   49.481980][ T7220] RDX: 0000000000001000 RSI: 000000c4203b2000 RDI: 0000000000000003
[   49.489927][ T7220] RBP: 000000c420167830 R08: 0000000000000000 R09: 0000000000000000
[   49.497890][ T7220] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000010
[   49.505838][ T7220] R13: ffffffffffffffff R14: 0000000000000002 R15: ffffffffffffffff
[   49.515150][ T7220] Kernel Offset: disabled
[   49.519465][ T7220] Rebooting in 86400 seconds..