[  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 '10.128.1.25' (ECDSA) to the list of known hosts.
2020/06/10 00:24:13 fuzzer started
2020/06/10 00:24:13 dialing manager at 10.128.0.105:35015
2020/06/10 00:24:14 syscalls: 3072
2020/06/10 00:24:14 code coverage: enabled
2020/06/10 00:24:14 comparison tracing: enabled
2020/06/10 00:24:14 extra coverage: enabled
2020/06/10 00:24:14 setuid sandbox: enabled
2020/06/10 00:24:14 namespace sandbox: enabled
2020/06/10 00:24:14 Android sandbox: /sys/fs/selinux/policy does not exist
2020/06/10 00:24:14 fault injection: enabled
2020/06/10 00:24:14 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/06/10 00:24:14 net packet injection: enabled
2020/06/10 00:24:14 net device setup: enabled
2020/06/10 00:24:14 concurrency sanitizer: enabled
2020/06/10 00:24:14 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/06/10 00:24:14 USB emulation: enabled
2020/06/10 00:24:14 adding functions to KCSAN blacklist: 'copy_process' 
syzkaller login: [   56.219207][ T8896] ==================================================================
[   56.227339][ T8896] BUG: KCSAN: data-race in ep_poll / ep_poll_callback
[   56.234087][ T8896] 
[   56.236405][ T8896] write to 0xffff8881266e8ad0 of 8 bytes by interrupt on cpu 0:
[   56.244129][ T8896]  ep_poll_callback+0x5f2/0x6c0
[   56.248960][ T8896]  __wake_up_common+0x76/0x180
[   56.253708][ T8896]  __wake_up_common_lock+0x77/0xb0
[   56.258798][ T8896]  sock_def_readable+0x9d/0x130
[   56.263629][ T8896]  tcp_data_ready+0x76/0xc0
[   56.268127][ T8896]  tcp_rcv_established+0xcb8/0xee0
[   56.273212][ T8896]  tcp_v4_do_rcv+0x396/0x4f0
[   56.277793][ T8896]  tcp_v4_rcv+0x1c55/0x1e10
[   56.282290][ T8896]  ip_protocol_deliver_rcu+0x4b/0x410
[   56.287638][ T8896]  ip_local_deliver_finish+0xf3/0x120
[   56.292988][ T8896]  ip_local_deliver+0x135/0x220
[   56.297815][ T8896]  ip_sublist_rcv_finish+0xf0/0x140
[   56.302991][ T8896]  ip_sublist_rcv+0x3f8/0x530
[   56.307644][ T8896]  ip_list_rcv+0x2f3/0x321
[   56.312040][ T8896]  __netif_receive_skb_list_core+0x368/0x5c0
[   56.318014][ T8896]  netif_receive_skb_list_internal+0x5c7/0x810
[   56.324143][ T8896]  gro_normal_list.part.0+0x37/0xa0
[   56.329317][ T8896]  gro_normal_one+0x14c/0x160
[   56.333988][ T8896]  napi_gro_receive+0x27d/0x2f0
[   56.338815][ T8896]  receive_buf+0x24c/0x3420
[   56.343294][ T8896]  virtnet_poll+0x343/0x790
[   56.347884][ T8896]  net_rx_action+0x3ad/0xac0
[   56.352471][ T8896]  __do_softirq+0x118/0x34a
[   56.356970][ T8896]  run_ksoftirqd+0x41/0x60
[   56.361370][ T8896]  smpboot_thread_fn+0x374/0x4a0
[   56.366282][ T8896]  kthread+0x203/0x230
[   56.370326][ T8896]  ret_from_fork+0x1f/0x30
[   56.374728][ T8896] 
[   56.377037][ T8896] read to 0xffff8881266e8ad0 of 8 bytes by task 8896 on cpu 1:
[   56.384555][ T8896]  ep_poll+0x473/0x910
[   56.388598][ T8896]  do_epoll_wait+0x15a/0x180
[   56.393169][ T8896]  __x64_sys_epoll_pwait+0xc6/0x170
[   56.398343][ T8896]  do_syscall_64+0xc7/0x3b0
[   56.402843][ T8896]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   56.408718][ T8896] 
[   56.411808][ T8896] Reported by Kernel Concurrency Sanitizer on:
[   56.417943][ T8896] CPU: 1 PID: 8896 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[   56.426158][ T8896] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   56.436192][ T8896] ==================================================================
[   56.444237][ T8896] Kernel panic - not syncing: panic_on_warn set ...
[   56.450810][ T8896] CPU: 1 PID: 8896 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[   56.459054][ T8896] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   56.469085][ T8896] Call Trace:
[   56.472360][ T8896]  dump_stack+0x11d/0x187
[   56.476686][ T8896]  panic+0x210/0x640
[   56.480559][ T8896]  ? vprintk_func+0x89/0x13a
[   56.485128][ T8896]  kcsan_report.cold+0xc/0x1a
[   56.489805][ T8896]  kcsan_setup_watchpoint+0x3fb/0x440
[   56.495185][ T8896]  ep_poll+0x473/0x910
[   56.499253][ T8896]  ? __fget_light+0xc0/0x1a0
[   56.503824][ T8896]  do_epoll_wait+0x15a/0x180
[   56.508395][ T8896]  __x64_sys_epoll_pwait+0xc6/0x170
[   56.513575][ T8896]  do_syscall_64+0xc7/0x3b0
[   56.518057][ T8896]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   56.525061][ T8896] RIP: 0033:0x469240
[   56.528936][ T8896] 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
[   56.549779][ T8896] RSP: 002b:000000c0001877f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000119
[   56.558219][ T8896] RAX: ffffffffffffffda RBX: 0000000000000272 RCX: 0000000000469240
[   56.566191][ T8896] RDX: 0000000000000080 RSI: 000000c000187840 RDI: 0000000000000003
[   56.575188][ T8896] RBP: 000000c000187e40 R08: 0000000000000000 R09: 0000000000000000
[   56.583134][ T8896] R10: 0000000000000272 R11: 0000000000000246 R12: 0000000000000003
[   56.591081][ T8896] R13: 000000c0000aa780 R14: 0000000000000002 R15: 0000000000000002
[   56.600340][ T8896] Kernel Offset: disabled
[   56.604667][ T8896] Rebooting in 86400 seconds..