[  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 '10.128.0.15' (ECDSA) to the list of known hosts.
2020/05/28 12:25:04 fuzzer started
2020/05/28 12:25:04 dialing manager at 10.128.0.105:45675
2020/05/28 12:25:05 syscalls: 3055
2020/05/28 12:25:05 code coverage: enabled
2020/05/28 12:25:05 comparison tracing: enabled
2020/05/28 12:25:05 extra coverage: enabled
2020/05/28 12:25:05 setuid sandbox: enabled
2020/05/28 12:25:05 namespace sandbox: enabled
2020/05/28 12:25:05 Android sandbox: /sys/fs/selinux/policy does not exist
2020/05/28 12:25:05 fault injection: enabled
2020/05/28 12:25:05 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/05/28 12:25:05 net packet injection: enabled
2020/05/28 12:25:05 net device setup: enabled
2020/05/28 12:25:05 concurrency sanitizer: enabled
2020/05/28 12:25:05 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/05/28 12:25:05 USB emulation: enabled
2020/05/28 12:25:05 adding functions to KCSAN blacklist: '__ext4_new_inode' 'run_timer_softirq' 'echo_char' 
syzkaller login: [   50.849030][ T8897] ==================================================================
[   50.857257][ T8897] BUG: KCSAN: data-race in ep_poll / ep_poll_callback
[   50.864002][ T8897] 
[   50.866320][ T8897] write to 0xffff8881267e67d0 of 8 bytes by interrupt on cpu 1:
[   50.873950][ T8897]  ep_poll_callback+0x5f2/0x6c0
[   50.878806][ T8897]  __wake_up_common+0x76/0x180
[   50.883573][ T8897]  __wake_up_common_lock+0x77/0xb0
[   50.888856][ T8897]  sock_def_readable+0x9d/0x130
[   50.893695][ T8897]  tcp_data_ready+0x76/0xc0
[   50.898358][ T8897]  tcp_rcv_established+0xcb8/0xee0
[   50.903459][ T8897]  tcp_v4_do_rcv+0x396/0x4f0
[   50.908030][ T8897]  tcp_v4_rcv+0x1c55/0x1e10
[   50.912531][ T8897]  ip_protocol_deliver_rcu+0x4b/0x410
[   50.917886][ T8897]  ip_local_deliver_finish+0xf3/0x120
[   50.923249][ T8897]  ip_local_deliver+0x135/0x220
[   50.928083][ T8897]  ip_sublist_rcv_finish+0xf0/0x140
[   50.933265][ T8897]  ip_sublist_rcv+0x3f8/0x530
[   50.937938][ T8897]  ip_list_rcv+0x2f3/0x321
[   50.942339][ T8897]  __netif_receive_skb_list_core+0x368/0x5c0
[   50.948389][ T8897]  netif_receive_skb_list_internal+0x5c7/0x810
[   50.954530][ T8897]  gro_normal_list.part.0+0x37/0xa0
[   50.959711][ T8897]  gro_normal_one+0x14c/0x160
[   50.964372][ T8897]  napi_gro_receive+0x27d/0x2f0
[   50.969293][ T8897]  receive_buf+0x24c/0x3420
[   50.973782][ T8897]  virtnet_poll+0x343/0x790
[   50.978269][ T8897]  net_rx_action+0x3ad/0xac0
[   50.982848][ T8897]  __do_softirq+0x118/0x34a
[   50.987333][ T8897]  run_ksoftirqd+0x41/0x60
[   50.991732][ T8897]  smpboot_thread_fn+0x374/0x4a0
[   50.996664][ T8897]  kthread+0x203/0x230
[   51.000715][ T8897]  ret_from_fork+0x1f/0x30
[   51.005118][ T8897] 
[   51.007434][ T8897] read to 0xffff8881267e67d0 of 8 bytes by task 8897 on cpu 0:
[   51.014956][ T8897]  ep_poll+0x5ad/0x910
[   51.019006][ T8897]  do_epoll_wait+0x15a/0x180
[   51.023579][ T8897]  __x64_sys_epoll_pwait+0xc6/0x170
[   51.029197][ T8897]  do_syscall_64+0xc7/0x3b0
[   51.033688][ T8897]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   51.039553][ T8897] 
[   51.041864][ T8897] Reported by Kernel Concurrency Sanitizer on:
[   51.048020][ T8897] CPU: 0 PID: 8897 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[   51.056233][ T8897] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   51.066267][ T8897] ==================================================================
[   51.074322][ T8897] Kernel panic - not syncing: panic_on_warn set ...
[   51.080900][ T8897] CPU: 0 PID: 8897 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[   51.089125][ T8897] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   51.099421][ T8897] Call Trace:
[   51.102708][ T8897]  dump_stack+0x11d/0x187
[   51.107039][ T8897]  panic+0x210/0x640
[   51.110923][ T8897]  ? vprintk_func+0x89/0x13a
[   51.115505][ T8897]  kcsan_report.cold+0xc/0x1a
[   51.120175][ T8897]  kcsan_setup_watchpoint+0x3fb/0x440
[   51.125543][ T8897]  ep_poll+0x5ad/0x910
[   51.129604][ T8897]  ? wake_up_q+0x90/0x90
[   51.133842][ T8897]  do_epoll_wait+0x15a/0x180
[   51.138432][ T8897]  __x64_sys_epoll_pwait+0xc6/0x170
[   51.143621][ T8897]  do_syscall_64+0xc7/0x3b0
[   51.148139][ T8897]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   51.154015][ T8897] RIP: 0033:0x469240
[   51.157902][ T8897] 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
[   51.177496][ T8897] RSP: 002b:000000c00087d7f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000119
[   51.185889][ T8897] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000469240
[   51.193841][ T8897] RDX: 0000000000000080 RSI: 000000c00087d840 RDI: 0000000000000003
[   51.201794][ T8897] RBP: 000000c00087de40 R08: 0000000000000000 R09: 0000000000000000
[   51.209748][ T8897] R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000003
[   51.217702][ T8897] R13: 000000c0001eea80 R14: 00000051a68757ac R15: 0000000000000008
[   51.227057][ T8897] Kernel Offset: disabled
[   51.231375][ T8897] Rebooting in 86400 seconds..