Warning: Permanently added '10.128.0.172' (ECDSA) to the list of known hosts. 2019/10/11 17:20:35 fuzzer started 2019/10/11 17:20:36 dialing manager at 10.128.0.105:43913 2019/10/11 17:20:36 syscalls: 2523 2019/10/11 17:20:36 code coverage: enabled 2019/10/11 17:20:36 comparison tracing: enabled 2019/10/11 17:20:36 extra coverage: extra coverage is not supported by the kernel 2019/10/11 17:20:36 setuid sandbox: enabled 2019/10/11 17:20:36 namespace sandbox: enabled 2019/10/11 17:20:36 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/11 17:20:36 fault injection: enabled 2019/10/11 17:20:36 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/10/11 17:20:36 net packet injection: enabled 2019/10/11 17:20:36 net device setup: enabled 2019/10/11 17:20:36 concurrency sanitizer: enabled syzkaller login: [ 53.747251][ T7202] ================================================================== [ 53.755404][ T7202] BUG: KCSAN: data-race in tcp_ack / tcp_poll [ 53.761454][ T7202] [ 53.763769][ T7202] write to 0xffff8881216f0a48 of 4 bytes by interrupt on cpu 1: [ 53.771404][ T7202] tcp_ack+0xf2c/0x3160 [ 53.775565][ T7202] tcp_rcv_established+0x37e/0xf50 [ 53.780675][ T7202] tcp_v4_do_rcv+0x381/0x4e0 [ 53.785261][ T7202] tcp_v4_rcv+0x1a03/0x1bf0 [ 53.789763][ T7202] ip_protocol_deliver_rcu+0x51/0x470 [ 53.795134][ T7202] ip_local_deliver_finish+0x110/0x140 [ 53.800585][ T7202] ip_local_deliver+0x133/0x210 [ 53.805442][ T7202] ip_rcv_finish+0x121/0x160 [ 53.810023][ T7202] ip_rcv+0x18f/0x1a0 [ 53.814000][ T7202] __netif_receive_skb_one_core+0xa7/0xe0 [ 53.819713][ T7202] __netif_receive_skb+0x37/0xf0 [ 53.824643][ T7202] netif_receive_skb_internal+0x59/0x190 [ 53.830265][ T7202] napi_gro_receive+0x28f/0x330 [ 53.835112][ T7202] receive_buf+0x284/0x30b0 [ 53.839597][ T7202] [ 53.841927][ T7202] read to 0xffff8881216f0a48 of 4 bytes by task 7202 on cpu 0: [ 53.849462][ T7202] tcp_poll+0x422/0x6b0 [ 53.853615][ T7202] sock_poll+0xed/0x250 [ 53.857770][ T7202] do_select+0x7d0/0x1020 [ 53.862090][ T7202] core_sys_select+0x38b/0x520 [ 53.866858][ T7202] kern_select+0x106/0x170 [ 53.871269][ T7202] __x64_sys_select+0x70/0x90 [ 53.875945][ T7202] do_syscall_64+0xcf/0x2f0 [ 53.880448][ T7202] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 53.886324][ T7202] [ 53.888640][ T7202] Reported by Kernel Concurrency Sanitizer on: [ 53.894786][ T7202] CPU: 0 PID: 7202 Comm: sshd Not tainted 5.3.0+ #0 [ 53.901358][ T7202] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.911401][ T7202] ================================================================== [ 53.919448][ T7202] Kernel panic - not syncing: panic_on_warn set ... [ 53.926023][ T7202] CPU: 0 PID: 7202 Comm: sshd Not tainted 5.3.0+ #0 [ 53.932603][ T7202] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.942652][ T7202] Call Trace: [ 53.945955][ T7202] dump_stack+0xf5/0x159 [ 53.950207][ T7202] panic+0x209/0x639 [ 53.954107][ T7202] ? vprintk_func+0x8d/0x140 [ 53.958703][ T7202] kcsan_report.cold+0xc/0x1b [ 53.963385][ T7202] __kcsan_setup_watchpoint+0x3ee/0x510 [ 53.968936][ T7202] __tsan_read4+0x2c/0x30 [ 53.973259][ T7202] tcp_poll+0x422/0x6b0 [ 53.977415][ T7202] ? tcp_alloc_md5sig_pool+0x320/0x320 [ 53.982872][ T7202] sock_poll+0xed/0x250 [ 53.987029][ T7202] ? sock_read_iter+0x1e0/0x1e0 [ 53.991881][ T7202] do_select+0x7d0/0x1020 [ 53.996232][ T7202] ? poll_initwait+0xa0/0xa0 [ 54.001174][ T7202] ? set_fd_set.part.0+0x60/0x60 [ 54.006204][ T7202] ? tcp_push+0x1f3/0x3d0 [ 54.010545][ T7202] ? sock_zerocopy_put+0x78/0x90 [ 54.015489][ T7202] ? tcp_sendmsg_locked+0xc0a/0x1ef0 [ 54.020779][ T7202] ? __kcsan_setup_watchpoint+0x96/0x510 [ 54.026416][ T7202] ? __kcsan_setup_watchpoint+0x96/0x510 [ 54.032046][ T7202] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.038285][ T7202] ? __this_cpu_preempt_check+0x4a/0x170 [ 54.043925][ T7202] ? __kcsan_setup_watchpoint+0x96/0x510 [ 54.049559][ T7202] ? _raw_spin_unlock_bh+0x44/0x50 [ 54.054667][ T7202] ? __tsan_read8+0x2c/0x30 [ 54.059167][ T7202] ? __kcsan_setup_watchpoint+0x96/0x510 [ 54.064798][ T7202] ? check_stack_object+0xda/0x110 [ 54.069909][ T7202] ? __kcsan_setup_watchpoint+0x96/0x510 [ 54.075539][ T7202] ? __tsan_read8+0x2c/0x30 [ 54.080041][ T7202] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 54.086288][ T7202] core_sys_select+0x38b/0x520 [ 54.091058][ T7202] ? __kcsan_setup_watchpoint+0x96/0x510 [ 54.096687][ T7202] ? __tsan_read8+0x2c/0x30 [ 54.101189][ T7202] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 54.107081][ T7202] ? __tsan_write8+0x32/0x40 [ 54.111671][ T7202] ? ktime_get_ts64+0x286/0x2b0 [ 54.116529][ T7202] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 54.122247][ T7202] ? timespec64_add_safe+0xae/0xd0 [ 54.127359][ T7202] kern_select+0x106/0x170 [ 54.131780][ T7202] __x64_sys_select+0x70/0x90 [ 54.136462][ T7202] do_syscall_64+0xcf/0x2f0 [ 54.140972][ T7202] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 54.146855][ T7202] RIP: 0033:0x7f478bdf9dd3 [ 54.151303][ T7202] Code: 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 90 90 90 90 90 90 90 90 90 83 3d 25 48 2b 00 00 75 13 49 89 ca b8 17 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 34 c3 48 83 ec 08 e8 ab 2f 01 00 48 89 04 24 [ 54.170910][ T7202] RSP: 002b:00007ffe5e02eab8 EFLAGS: 00000246 ORIG_RAX: 0000000000000017 [ 54.179325][ T7202] RAX: ffffffffffffffda RBX: 00007ffe5e02eb40 RCX: 00007f478bdf9dd3 [ 54.187301][ T7202] RDX: 00005629bd032b10 RSI: 00005629bd032b30 RDI: 000000000000000c [ 54.195271][ T7202] RBP: 00005629bba5e8dc R08: 00007ffe5e02eae0 R09: 0101010101010101 [ 54.203246][ T7202] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe5e02eb48 [ 54.211230][ T7202] R13: 0000000000000000 R14: 00007ffe5e02eb38 R15: 00007ffe5e02eb3c [ 54.220658][ T7202] Kernel Offset: disabled [ 54.224980][ T7202] Rebooting in 86400 seconds..