Warning: Permanently added '10.128.0.4' (ECDSA) to the list of known hosts.
2019/10/23 00:42:22 fuzzer started
2019/10/23 00:42:24 dialing manager at 10.128.0.105:33369
2019/10/23 00:42:24 syscalls: 2524
2019/10/23 00:42:24 code coverage: enabled
2019/10/23 00:42:24 comparison tracing: enabled
2019/10/23 00:42:24 extra coverage: extra coverage is not supported by the kernel
2019/10/23 00:42:24 setuid sandbox: enabled
2019/10/23 00:42:24 namespace sandbox: enabled
2019/10/23 00:42:24 Android sandbox: /sys/fs/selinux/policy does not exist
2019/10/23 00:42:24 fault injection: enabled
2019/10/23 00:42:24 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/10/23 00:42:24 net packet injection: enabled
2019/10/23 00:42:24 net device setup: enabled
2019/10/23 00:42:24 concurrency sanitizer: enabled
syzkaller login: [   60.233589][ T7422] ==================================================================
[   60.241781][ T7422] BUG: KCSAN: data-race in __tcp_select_window / tcp_add_backlog
[   60.249784][ T7422] 
[   60.252224][ T7422] write to 0xffff88811ac0d2ec of 4 bytes by interrupt on cpu 0:
[   60.259944][ T7422]  tcp_add_backlog+0x4a0/0xcc0
[   60.264705][ T7422]  tcp_v4_rcv+0x1a60/0x1bb0
[   60.269309][ T7422]  ip_protocol_deliver_rcu+0x4d/0x420
[   60.274684][ T7422]  ip_local_deliver_finish+0x110/0x140
[   60.280136][ T7422]  ip_local_deliver+0x133/0x210
[   60.284993][ T7422]  ip_rcv_finish+0x121/0x160
[   60.289579][ T7422]  ip_rcv+0x18f/0x1a0
[   60.293553][ T7422]  __netif_receive_skb_one_core+0xa7/0xe0
[   60.299365][ T7422]  __netif_receive_skb+0x37/0xf0
[   60.304728][ T7422]  netif_receive_skb_internal+0x59/0x190
[   60.310351][ T7422]  napi_gro_receive+0x28f/0x330
[   60.315197][ T7422]  receive_buf+0x284/0x30b0
[   60.319679][ T7422]  virtnet_poll+0x436/0x7d0
[   60.324163][ T7422]  net_rx_action+0x3ae/0xa90
[   60.328725][ T7422] 
[   60.331054][ T7422] read to 0xffff88811ac0d2ec of 4 bytes by task 7422 on cpu 1:
[   60.338614][ T7422]  __tcp_select_window+0x6b/0x4d0
[   60.343622][ T7422]  __tcp_transmit_skb+0x700/0x1d60
[   60.348711][ T7422]  __tcp_send_ack+0x246/0x300
[   60.353375][ T7422]  tcp_send_ack+0x34/0x40
[   60.357687][ T7422]  tcp_cleanup_rbuf+0x130/0x360
[   60.362540][ T7422]  tcp_recvmsg+0x633/0x1a30
[   60.367032][ T7422]  inet_recvmsg+0xbb/0x250
[   60.371441][ T7422]  sock_recvmsg+0x92/0xb0
[   60.375750][ T7422]  sock_read_iter+0x15f/0x1e0
[   60.380411][ T7422]  new_sync_read+0x389/0x4f0
[   60.385183][ T7422]  __vfs_read+0xb1/0xc0
[   60.389338][ T7422]  vfs_read+0x143/0x2c0
[   60.393474][ T7422]  ksys_read+0xd5/0x1b0
[   60.397615][ T7422] 
[   60.400014][ T7422] Reported by Kernel Concurrency Sanitizer on:
[   60.406358][ T7422] CPU: 1 PID: 7422 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #0
[   60.413892][ T7422] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   60.424239][ T7422] ==================================================================
[   60.432375][ T7422] Kernel panic - not syncing: panic_on_warn set ...
[   60.440353][ T7422] CPU: 1 PID: 7422 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #0
[   60.447788][ T7422] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   60.457836][ T7422] Call Trace:
[   60.461138][ T7422]  dump_stack+0xf5/0x159
[   60.465365][ T7422]  panic+0x210/0x640
[   60.469246][ T7422]  ? sock_read_iter+0x15f/0x1e0
[   60.474325][ T7422]  ? vprintk_func+0x8d/0x140
[   60.478918][ T7422]  kcsan_report.cold+0xc/0x10
[   60.483580][ T7422]  __kcsan_setup_watchpoint+0x32e/0x4a0
[   60.489289][ T7422]  __tsan_read4+0x2c/0x30
[   60.493701][ T7422]  __tcp_select_window+0x6b/0x4d0
[   60.498716][ T7422]  __tcp_transmit_skb+0x700/0x1d60
[   60.503917][ T7422]  __tcp_send_ack+0x246/0x300
[   60.508619][ T7422]  tcp_send_ack+0x34/0x40
[   60.513052][ T7422]  tcp_cleanup_rbuf+0x130/0x360
[   60.517919][ T7422]  tcp_recvmsg+0x633/0x1a30
[   60.522432][ T7422]  inet_recvmsg+0xbb/0x250
[   60.526861][ T7422]  ? __tsan_read8+0x2c/0x30
[   60.531443][ T7422]  ? inet_sendpage+0x100/0x100
[   60.536197][ T7422]  sock_recvmsg+0x92/0xb0
[   60.540524][ T7422]  sock_read_iter+0x15f/0x1e0
[   60.545205][ T7422]  new_sync_read+0x389/0x4f0
[   60.549844][ T7422]  __vfs_read+0xb1/0xc0
[   60.554075][ T7422]  vfs_read+0x143/0x2c0
[   60.558227][ T7422]  ksys_read+0xd5/0x1b0
[   60.562362][ T7422]  __x64_sys_read+0x4c/0x60
[   60.567226][ T7422]  do_syscall_64+0xcc/0x370
[   60.571719][ T7422]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   60.577596][ T7422] RIP: 0033:0x47c530
[   60.581475][ T7422] 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
[   60.601066][ T7422] RSP: 002b:000000c4203a97d8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000
[   60.609474][ T7422] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530
[   60.617620][ T7422] RDX: 0000000000001000 RSI: 000000c42024c000 RDI: 0000000000000003
[   60.625728][ T7422] RBP: 000000c4203a9830 R08: 0000000000000000 R09: 0000000000000000
[   60.633794][ T7422] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000004
[   60.641855][ T7422] R13: 000000c4200214a0 R14: 0000000000000002 R15: ffffffffffffffff
[   60.651492][ T7422] Kernel Offset: disabled
[   60.655830][ T7422] Rebooting in 86400 seconds..