Warning: Permanently added '10.128.0.213' (ECDSA) to the list of known hosts. 2019/10/08 03:15:34 fuzzer started 2019/10/08 03:15:35 dialing manager at 10.128.0.105:39369 2019/10/08 03:15:35 syscalls: 2523 2019/10/08 03:15:35 code coverage: enabled 2019/10/08 03:15:35 comparison tracing: enabled 2019/10/08 03:15:35 extra coverage: extra coverage is not supported by the kernel 2019/10/08 03:15:35 setuid sandbox: enabled 2019/10/08 03:15:35 namespace sandbox: enabled 2019/10/08 03:15:35 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/08 03:15:35 fault injection: enabled 2019/10/08 03:15:35 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/10/08 03:15:35 net packet injection: enabled 2019/10/08 03:15:35 net device setup: enabled 2019/10/08 03:15:35 concurrency sanitizer: enabled syzkaller login: [ 45.642196][ T7243] ================================================================== [ 45.650490][ T7243] BUG: KCSAN: data-race in tcp_add_backlog / tcp_try_rmem_schedule [ 45.658365][ T7243] [ 45.660687][ T7243] read to 0xffff888123242a0c of 4 bytes by interrupt on cpu 1: [ 45.668208][ T7243] tcp_add_backlog+0x43/0xcc0 [ 45.672861][ T7243] tcp_v4_rcv+0x1aba/0x1bf0 [ 45.677342][ T7243] ip_protocol_deliver_rcu+0x51/0x470 [ 45.682690][ T7243] ip_local_deliver_finish+0x110/0x140 [ 45.688124][ T7243] ip_local_deliver+0x133/0x210 [ 45.692958][ T7243] ip_rcv_finish+0x121/0x160 [ 45.697541][ T7243] ip_rcv+0x18f/0x1a0 [ 45.701504][ T7243] __netif_receive_skb_one_core+0xa7/0xe0 [ 45.707213][ T7243] __netif_receive_skb+0x37/0xf0 [ 45.712138][ T7243] netif_receive_skb_internal+0x59/0x190 [ 45.717758][ T7243] napi_gro_receive+0x28f/0x330 [ 45.722594][ T7243] receive_buf+0x284/0x30b0 [ 45.727075][ T7243] virtnet_poll+0x436/0x7d0 [ 45.731570][ T7243] net_rx_action+0x3ae/0xa50 [ 45.736128][ T7243] [ 45.738440][ T7243] write to 0xffff888123242a0c of 4 bytes by task 7243 on cpu 0: [ 45.746049][ T7243] tcp_try_rmem_schedule+0x294/0xb90 [ 45.751314][ T7243] tcp_data_queue+0x7ba/0x2000 [ 45.756053][ T7243] tcp_rcv_established+0x517/0xf50 [ 45.761157][ T7243] tcp_v4_do_rcv+0x381/0x4e0 [ 45.765725][ T7243] __release_sock+0x135/0x1e0 [ 45.770388][ T7243] release_sock+0x61/0x160 [ 45.774780][ T7243] tcp_recvmsg+0x63b/0x1a30 [ 45.779263][ T7243] inet_recvmsg+0xbb/0x250 [ 45.783661][ T7243] sock_recvmsg+0x92/0xb0 [ 45.787972][ T7243] sock_read_iter+0x15f/0x1e0 [ 45.792627][ T7243] new_sync_read+0x389/0x4f0 [ 45.797210][ T7243] __vfs_read+0xb1/0xc0 [ 45.801341][ T7243] vfs_read+0x143/0x2c0 [ 45.805465][ T7243] [ 45.807765][ T7243] Reported by Kernel Concurrency Sanitizer on: [ 45.813895][ T7243] CPU: 0 PID: 7243 Comm: syz-fuzzer Not tainted 5.3.0+ #0 [ 45.820982][ T7243] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.831013][ T7243] ================================================================== [ 45.839049][ T7243] Kernel panic - not syncing: panic_on_warn set ... [ 45.845612][ T7243] CPU: 0 PID: 7243 Comm: syz-fuzzer Not tainted 5.3.0+ #0 [ 45.853039][ T7243] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.863077][ T7243] Call Trace: [ 45.866361][ T7243] dump_stack+0xf5/0x159 [ 45.870586][ T7243] panic+0x209/0x639 [ 45.874460][ T7243] ? vprintk_func+0x8d/0x140 [ 45.879030][ T7243] kcsan_report.cold+0x57/0xeb [ 45.883772][ T7243] __kcsan_setup_watchpoint+0x342/0x500 [ 45.889396][ T7243] __tsan_write4+0x32/0x40 [ 45.893792][ T7243] tcp_try_rmem_schedule+0x294/0xb90 [ 45.899058][ T7243] tcp_data_queue+0x7ba/0x2000 [ 45.903804][ T7243] ? tcp_urg+0xa1/0x5c0 [ 45.907940][ T7243] tcp_rcv_established+0x517/0xf50 [ 45.913119][ T7243] ? ipv4_dst_check+0xc6/0xf0 [ 45.917774][ T7243] tcp_v4_do_rcv+0x381/0x4e0 [ 45.922344][ T7243] __release_sock+0x135/0x1e0 [ 45.927011][ T7243] release_sock+0x61/0x160 [ 45.931408][ T7243] tcp_recvmsg+0x63b/0x1a30 [ 45.935898][ T7243] inet_recvmsg+0xbb/0x250 [ 45.940291][ T7243] ? __tsan_read8+0x2c/0x30 [ 45.944860][ T7243] ? inet_sendpage+0x100/0x100 [ 45.949706][ T7243] sock_recvmsg+0x92/0xb0 [ 45.954015][ T7243] sock_read_iter+0x15f/0x1e0 [ 45.958675][ T7243] new_sync_read+0x389/0x4f0 [ 45.963249][ T7243] __vfs_read+0xb1/0xc0 [ 45.967387][ T7243] vfs_read+0x143/0x2c0 [ 45.971527][ T7243] ksys_read+0xd5/0x1b0 [ 45.975660][ T7243] __x64_sys_read+0x4c/0x60 [ 45.980148][ T7243] do_syscall_64+0xcf/0x2f0 [ 45.984635][ T7243] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 45.990506][ T7243] RIP: 0033:0x47c530 [ 45.994382][ T7243] 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 [ 46.013962][ T7243] RSP: 002b:000000c4203b7810 EFLAGS: 00000202 ORIG_RAX: 0000000000000000 [ 46.022349][ T7243] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 46.030297][ T7243] RDX: 0000000000001000 RSI: 000000c4203e0000 RDI: 0000000000000003 [ 46.038595][ T7243] RBP: 000000c4203b7868 R08: 0000000000000000 R09: 0000000000000000 [ 46.046545][ T7243] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000080 [ 46.054582][ T7243] R13: ffffffffffffffff R14: 0000000000000002 R15: ffffffffffffffff [ 46.063942][ T7243] Kernel Offset: disabled [ 46.068269][ T7243] Rebooting in 86400 seconds..