Warning: Permanently added '10.128.0.29' (ECDSA) to the list of known hosts. 2019/10/19 02:05:01 fuzzer started 2019/10/19 02:05:03 dialing manager at 10.128.0.105:43535 2019/10/19 02:05:03 syscalls: 2524 2019/10/19 02:05:03 code coverage: enabled 2019/10/19 02:05:03 comparison tracing: enabled 2019/10/19 02:05:03 extra coverage: extra coverage is not supported by the kernel 2019/10/19 02:05:03 setuid sandbox: enabled 2019/10/19 02:05:03 namespace sandbox: enabled 2019/10/19 02:05:03 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/19 02:05:03 fault injection: enabled syzkaller login: [ 52.377534][ T7266] ================================================================== [ 52.385802][ T7266] BUG: KCSAN: data-race in tcp_ack / tcp_poll [ 52.391927][ T7266] [ 52.394238][ T7266] write to 0xffff8881255881c8 of 4 bytes by interrupt on cpu 1: [ 52.401932][ T7266] tcp_ack+0xf2c/0x3170 [ 52.406073][ T7266] tcp_rcv_established+0x37e/0xf50 [ 52.411170][ T7266] tcp_v4_do_rcv+0x381/0x4e0 [ 52.415744][ T7266] tcp_v4_rcv+0x19dc/0x1bb0 [ 52.420228][ T7266] ip_protocol_deliver_rcu+0x4d/0x420 [ 52.426009][ T7266] ip_local_deliver_finish+0x110/0x140 [ 52.431446][ T7266] ip_local_deliver+0x133/0x210 [ 52.436272][ T7266] ip_rcv_finish+0x121/0x160 [ 52.440848][ T7266] ip_rcv+0x18f/0x1a0 [ 52.444820][ T7266] __netif_receive_skb_one_core+0xa7/0xe0 [ 52.450526][ T7266] __netif_receive_skb+0x37/0xf0 [ 52.455443][ T7266] netif_receive_skb_internal+0x59/0x190 [ 52.461054][ T7266] napi_gro_receive+0x28f/0x330 [ 52.465944][ T7266] receive_buf+0x284/0x30b0 [ 52.470441][ T7266] [ 52.472764][ T7266] read to 0xffff8881255881c8 of 4 bytes by task 7266 on cpu 0: [ 52.480298][ T7266] tcp_poll+0x422/0x6b0 [ 52.484457][ T7266] sock_poll+0xed/0x250 [ 52.488592][ T7266] do_select+0x7d0/0x1020 [ 52.492910][ T7266] core_sys_select+0x381/0x550 [ 52.497659][ T7266] kern_select+0x106/0x170 [ 52.502050][ T7266] __x64_sys_select+0x70/0x90 [ 52.506703][ T7266] do_syscall_64+0xcc/0x370 [ 52.511183][ T7266] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 52.517046][ T7266] [ 52.519357][ T7266] Reported by Kernel Concurrency Sanitizer on: [ 52.525491][ T7266] CPU: 0 PID: 7266 Comm: sshd Not tainted 5.4.0-rc3+ #0 [ 52.532414][ T7266] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.542455][ T7266] ================================================================== [ 52.550497][ T7266] Kernel panic - not syncing: panic_on_warn set ... [ 52.557059][ T7266] CPU: 0 PID: 7266 Comm: sshd Not tainted 5.4.0-rc3+ #0 [ 52.563973][ T7266] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.574015][ T7266] Call Trace: [ 52.577288][ T7266] dump_stack+0xf5/0x159 [ 52.581520][ T7266] panic+0x210/0x640 [ 52.585406][ T7266] ? vprintk_func+0x8d/0x140 [ 52.589986][ T7266] kcsan_report.cold+0xc/0x10 [ 52.594657][ T7266] __kcsan_setup_watchpoint+0x32e/0x4a0 [ 52.600180][ T7266] __tsan_read4+0x2c/0x30 [ 52.604499][ T7266] tcp_poll+0x422/0x6b0 [ 52.608649][ T7266] ? tcp_alloc_md5sig_pool+0x320/0x320 [ 52.614145][ T7266] sock_poll+0xed/0x250 [ 52.618381][ T7266] ? sock_read_iter+0x1e0/0x1e0 [ 52.623217][ T7266] do_select+0x7d0/0x1020 [ 52.627546][ T7266] ? poll_initwait+0xa0/0xa0 [ 52.632464][ T7266] ? poll_select_finish+0x440/0x440 [ 52.637652][ T7266] ? tcp_push+0x1f3/0x3d0 [ 52.641966][ T7266] ? sock_zerocopy_put+0x78/0x90 [ 52.646883][ T7266] ? tcp_sendmsg_locked+0xbe4/0x1f30 [ 52.652173][ T7266] ? __kcsan_setup_watchpoint+0x6b/0x4a0 [ 52.657794][ T7266] ? __kcsan_setup_watchpoint+0x6b/0x4a0 [ 52.663418][ T7266] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.669640][ T7266] ? __this_cpu_preempt_check+0x4a/0x170 [ 52.675251][ T7266] ? __local_bh_enable_ip+0x32/0x80 [ 52.680424][ T7266] ? __kcsan_setup_watchpoint+0x6b/0x4a0 [ 52.686062][ T7266] ? _raw_spin_unlock_bh+0x44/0x50 [ 52.691158][ T7266] ? __tsan_read8+0x2c/0x30 [ 52.695655][ T7266] ? __kcsan_setup_watchpoint+0x6b/0x4a0 [ 52.701274][ T7266] ? check_stack_object+0xda/0x110 [ 52.706381][ T7266] ? __kcsan_setup_watchpoint+0x6b/0x4a0 [ 52.711998][ T7266] ? __tsan_read8+0x2c/0x30 [ 52.716490][ T7266] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 52.722712][ T7266] core_sys_select+0x381/0x550 [ 52.727457][ T7266] ? __kcsan_setup_watchpoint+0x6b/0x4a0 [ 52.733082][ T7266] ? __tsan_read8+0x2c/0x30 [ 52.737576][ T7266] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 52.743446][ T7266] ? __tsan_write8+0x32/0x40 [ 52.748013][ T7266] ? ktime_get_ts64+0x286/0x2c0 [ 52.752840][ T7266] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 52.758547][ T7266] ? timespec64_add_safe+0xae/0xd0 [ 52.763646][ T7266] kern_select+0x106/0x170 [ 52.768042][ T7266] __x64_sys_select+0x70/0x90 [ 52.772710][ T7266] do_syscall_64+0xcc/0x370 [ 52.777202][ T7266] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 52.783076][ T7266] RIP: 0033:0x7fdba897ddd3 [ 52.787473][ T7266] 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 [ 52.807054][ T7266] RSP: 002b:00007ffe67363498 EFLAGS: 00000246 ORIG_RAX: 0000000000000017 [ 52.815446][ T7266] RAX: ffffffffffffffda RBX: 00007ffe67363520 RCX: 00007fdba897ddd3 [ 52.823392][ T7266] RDX: 000055b143366af0 RSI: 000055b143366b10 RDI: 000000000000000c [ 52.831343][ T7266] RBP: 000055b14167c8dc R08: 00007ffe673634c0 R09: 0101010101010101 [ 52.839299][ T7266] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe67363528 [ 52.847255][ T7266] R13: 0000000000000000 R14: 00007ffe67363518 R15: 00007ffe6736351c [ 52.857481][ T7266] Kernel Offset: disabled [ 52.861811][ T7266] Rebooting in 86400 seconds..