[  OK  ] Reached target Login Prompts.
[  OK  ] Reached target Multi-User System.
[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.


Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.10.36' (ECDSA) to the list of known hosts.
2020/06/05 13:13:52 fuzzer started
2020/06/05 13:13:53 dialing manager at 10.128.0.105:41441
2020/06/05 13:13:53 syscalls: 3055
2020/06/05 13:13:53 code coverage: enabled
2020/06/05 13:13:53 comparison tracing: enabled
2020/06/05 13:13:53 extra coverage: enabled
2020/06/05 13:13:53 setuid sandbox: enabled
2020/06/05 13:13:53 namespace sandbox: enabled
2020/06/05 13:13:53 Android sandbox: /sys/fs/selinux/policy does not exist
2020/06/05 13:13:53 fault injection: enabled
2020/06/05 13:13:53 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/06/05 13:13:53 net packet injection: enabled
2020/06/05 13:13:53 net device setup: enabled
2020/06/05 13:13:53 concurrency sanitizer: enabled
2020/06/05 13:13:53 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/06/05 13:13:53 USB emulation: enabled
2020/06/05 13:13:54 adding functions to KCSAN blacklist: 'futex_wait_queue_me' '_find_next_bit' 
syzkaller login: [   51.323828][ T8923] KCSAN: could not find function: '_find_next_bit'
[   52.949714][ T8911] ==================================================================
[   52.957833][ T8911] BUG: KCSAN: data-race in ep_poll / ep_poll_callback
[   52.964584][ T8911] 
[   52.966898][ T8911] write to 0xffff888125559590 of 8 bytes by interrupt on cpu 1:
[   52.974525][ T8911]  ep_poll_callback+0x5f2/0x6c0
[   52.979362][ T8911]  __wake_up_common+0x76/0x180
[   52.984109][ T8911]  __wake_up_common_lock+0x77/0xb0
[   52.989205][ T8911]  sock_def_readable+0x9d/0x130
[   52.994042][ T8911]  tcp_data_ready+0x76/0xc0
[   52.998530][ T8911]  tcp_rcv_established+0xcb8/0xee0
[   53.003621][ T8911]  tcp_v4_do_rcv+0x396/0x4f0
[   53.008195][ T8911]  tcp_v4_rcv+0x1c55/0x1e10
[   53.012683][ T8911]  ip_protocol_deliver_rcu+0x4b/0x410
[   53.018054][ T8911]  ip_local_deliver_finish+0xf3/0x120
[   53.023782][ T8911]  ip_local_deliver+0x135/0x220
[   53.028617][ T8911]  ip_sublist_rcv_finish+0xf0/0x140
[   53.033818][ T8911]  ip_sublist_rcv+0x3f8/0x530
[   53.038481][ T8911]  ip_list_rcv+0x2f3/0x321
[   53.042884][ T8911]  __netif_receive_skb_list_core+0x368/0x5c0
[   53.048850][ T8911]  netif_receive_skb_list_internal+0x5c7/0x810
[   53.054987][ T8911]  gro_normal_list.part.0+0x37/0xa0
[   53.060169][ T8911]  gro_normal_one+0x14c/0x160
[   53.064829][ T8911]  napi_gro_receive+0x27d/0x2f0
[   53.069666][ T8911]  receive_buf+0x24c/0x3420
[   53.074155][ T8911]  virtnet_poll+0x343/0x790
[   53.078642][ T8911]  net_rx_action+0x3ad/0xac0
[   53.083216][ T8911]  __do_softirq+0x118/0x34a
[   53.087706][ T8911]  run_ksoftirqd+0x41/0x60
[   53.092105][ T8911]  smpboot_thread_fn+0x374/0x4a0
[   53.097024][ T8911]  kthread+0x203/0x230
[   53.101073][ T8911]  ret_from_fork+0x1f/0x30
[   53.105464][ T8911] 
[   53.107780][ T8911] read to 0xffff888125559590 of 8 bytes by task 8911 on cpu 0:
[   53.115306][ T8911]  ep_poll+0x5ad/0x910
[   53.119356][ T8911]  do_epoll_wait+0x15a/0x180
[   53.123927][ T8911]  __x64_sys_epoll_pwait+0xc6/0x170
[   53.129113][ T8911]  do_syscall_64+0xc7/0x3b0
[   53.133600][ T8911]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   53.139465][ T8911] 
[   53.141771][ T8911] Reported by Kernel Concurrency Sanitizer on:
[   53.147911][ T8911] CPU: 0 PID: 8911 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[   53.156124][ T8911] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   53.166278][ T8911] ==================================================================
[   53.174322][ T8911] Kernel panic - not syncing: panic_on_warn set ...
[   53.180899][ T8911] CPU: 0 PID: 8911 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[   53.189130][ T8911] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   53.199164][ T8911] Call Trace:
[   53.202444][ T8911]  dump_stack+0x11d/0x187
[   53.206763][ T8911]  panic+0x210/0x640
[   53.210663][ T8911]  ? vprintk_func+0x89/0x13a
[   53.215242][ T8911]  kcsan_report.cold+0xc/0x1a
[   53.219914][ T8911]  kcsan_setup_watchpoint+0x3fb/0x440
[   53.225449][ T8911]  ep_poll+0x5ad/0x910
[   53.229511][ T8911]  ? wake_up_q+0x90/0x90
[   53.233747][ T8911]  do_epoll_wait+0x15a/0x180
[   53.238326][ T8911]  __x64_sys_epoll_pwait+0xc6/0x170
[   53.243515][ T8911]  do_syscall_64+0xc7/0x3b0
[   53.248007][ T8911]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   53.253878][ T8911] RIP: 0033:0x469240
[   53.257763][ T8911] Code: 0f 05 89 44 24 20 c3 cc cc cc 8b 7c 24 08 48 8b 74 24 10 8b 54 24 18 44 8b 54 24 1c 49 c7 c0 00 00 00 00 b8 19 01 00 00 0f 05 <89> 44 24 20 c3 cc cc cc cc cc cc cc cc cc cc cc 8b 7c 24 08 48 c7
[   53.277351][ T8911] RSP: 002b:000000c0000497f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000119
[   53.285745][ T8911] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000469240
[   53.293699][ T8911] RDX: 0000000000000080 RSI: 000000c000049840 RDI: 0000000000000003
[   53.301654][ T8911] RBP: 000000c000049e40 R08: 0000000000000000 R09: 0000000000000000
[   53.309607][ T8911] R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000003
[   53.317561][ T8911] R13: 000000c000000f00 R14: 000000522ca97123 R15: 00000000000002a1
[   53.326937][ T8911] Kernel Offset: disabled
[   53.331255][ T8911] Rebooting in 86400 seconds..