[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
         Starting Load/Save RF Kill Switch Status...
[  OK  ] Started Update UTMP about System Runlevel Changes.
[  OK  ] Started Load/Save RF Kill Switch Status.


Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.10.59' (ECDSA) to the list of known hosts.
2020/05/24 12:32:57 fuzzer started
2020/05/24 12:32:58 dialing manager at 10.128.0.105:40647
2020/05/24 12:32:58 syscalls: 3055
2020/05/24 12:32:58 code coverage: enabled
2020/05/24 12:32:58 comparison tracing: enabled
2020/05/24 12:32:58 extra coverage: enabled
2020/05/24 12:32:58 setuid sandbox: enabled
2020/05/24 12:32:58 namespace sandbox: enabled
2020/05/24 12:32:58 Android sandbox: /sys/fs/selinux/policy does not exist
2020/05/24 12:32:58 fault injection: enabled
2020/05/24 12:32:58 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/05/24 12:32:58 net packet injection: enabled
2020/05/24 12:32:58 net device setup: enabled
2020/05/24 12:32:58 concurrency sanitizer: enabled
2020/05/24 12:32:58 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/05/24 12:32:58 USB emulation: enabled
2020/05/24 12:32:59 adding functions to KCSAN blacklist: '__mpage_writepage' '_find_next_bit' 
syzkaller login: [   52.696196][ T8921] KCSAN: could not find function: '_find_next_bit'
[   53.973442][ T8910] ==================================================================
[   53.981538][ T8910] BUG: KCSAN: data-race in ep_poll / ep_poll_callback
[   53.988271][ T8910] 
[   53.990598][ T8910] write to 0xffff8881267901d0 of 8 bytes by interrupt on cpu 0:
[   53.998232][ T8910]  ep_poll_callback+0x5f2/0x6c0
[   54.003096][ T8910]  __wake_up_common+0x76/0x180
[   54.007860][ T8910]  __wake_up_common_lock+0x77/0xb0
[   54.012961][ T8910]  sock_def_readable+0x9d/0x130
[   54.017842][ T8910]  tcp_data_ready+0x76/0xc0
[   54.022341][ T8910]  tcp_rcv_established+0xcb8/0xee0
[   54.027456][ T8910]  tcp_v4_do_rcv+0x396/0x4f0
[   54.032033][ T8910]  tcp_v4_rcv+0x1c55/0x1e10
[   54.036527][ T8910]  ip_protocol_deliver_rcu+0x4b/0x410
[   54.041892][ T8910]  ip_local_deliver_finish+0xf3/0x120
[   54.047299][ T8910]  ip_local_deliver+0x135/0x220
[   54.052128][ T8910]  ip_sublist_rcv_finish+0xf0/0x140
[   54.057326][ T8910]  ip_sublist_rcv+0x3f8/0x530
[   54.062007][ T8910]  ip_list_rcv+0x2f3/0x321
[   54.066401][ T8910]  __netif_receive_skb_list_core+0x368/0x5c0
[   54.072370][ T8910]  netif_receive_skb_list_internal+0x5c7/0x810
[   54.078500][ T8910]  gro_normal_list.part.0+0x37/0xa0
[   54.083686][ T8910]  gro_normal_one+0x14c/0x160
[   54.088337][ T8910]  napi_gro_receive+0x27d/0x2f0
[   54.093162][ T8910]  receive_buf+0x24c/0x3420
[   54.097653][ T8910]  virtnet_poll+0x343/0x790
[   54.102132][ T8910]  net_rx_action+0x3ad/0xac0
[   54.106699][ T8910]  __do_softirq+0x118/0x34a
[   54.111177][ T8910]  run_ksoftirqd+0x41/0x60
[   54.115571][ T8910]  smpboot_thread_fn+0x374/0x4a0
[   54.120481][ T8910]  kthread+0x203/0x230
[   54.124523][ T8910]  ret_from_fork+0x1f/0x30
[   54.129006][ T8910] 
[   54.131326][ T8910] read to 0xffff8881267901d0 of 8 bytes by task 8910 on cpu 1:
[   54.138845][ T8910]  ep_poll+0x473/0x910
[   54.142888][ T8910]  do_epoll_wait+0x15a/0x180
[   54.147452][ T8910]  __x64_sys_epoll_pwait+0xc6/0x170
[   54.152638][ T8910]  do_syscall_64+0xc7/0x3b0
[   54.157132][ T8910]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   54.163010][ T8910] 
[   54.165309][ T8910] Reported by Kernel Concurrency Sanitizer on:
[   54.171439][ T8910] CPU: 1 PID: 8910 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[   54.179682][ T8910] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   54.189749][ T8910] ==================================================================
[   54.197794][ T8910] Kernel panic - not syncing: panic_on_warn set ...
[   54.204397][ T8910] CPU: 1 PID: 8910 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[   54.212604][ T8910] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   54.222641][ T8910] Call Trace:
[   54.225922][ T8910]  dump_stack+0x11d/0x187
[   54.230228][ T8910]  panic+0x210/0x640
[   54.234102][ T8910]  ? vprintk_func+0x89/0x13a
[   54.238670][ T8910]  kcsan_report.cold+0xc/0x1a
[   54.243330][ T8910]  kcsan_setup_watchpoint+0x3fb/0x440
[   54.248678][ T8910]  ep_poll+0x473/0x910
[   54.252738][ T8910]  ? __fget_light+0xc0/0x1a0
[   54.257306][ T8910]  do_epoll_wait+0x15a/0x180
[   54.261881][ T8910]  ? fput+0x20/0x30
[   54.265666][ T8910]  __x64_sys_epoll_pwait+0xc6/0x170
[   54.270861][ T8910]  do_syscall_64+0xc7/0x3b0
[   54.275349][ T8910]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   54.281227][ T8910] RIP: 0033:0x45b300
[   54.285102][ T8910] 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
[   54.304694][ T8910] RSP: 002b:000000c42013f860 EFLAGS: 00000246 ORIG_RAX: 0000000000000119
[   54.313086][ T8910] RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 000000000045b300
[   54.321046][ T8910] RDX: 0000000000000080 RSI: 000000c42013f8a0 RDI: 0000000000000004
[   54.329008][ T8910] RBP: 000000c42013fea0 R08: 0000000000000000 R09: 0000000000000000
[   54.337371][ T8910] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000020
[   54.345538][ T8910] R13: ffffffffffffffff R14: 0000000000000004 R15: ffffffffffffffff
[   54.354805][ T8910] Kernel Offset: disabled
[   54.359211][ T8910] Rebooting in 86400 seconds..