[  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 '10.128.0.147' (ECDSA) to the list of known hosts.
2020/06/16 22:56:34 fuzzer started
2020/06/16 22:56:34 dialing manager at 10.128.0.105:33867
2020/06/16 22:56:34 syscalls: 3085
2020/06/16 22:56:34 code coverage: enabled
2020/06/16 22:56:34 comparison tracing: enabled
2020/06/16 22:56:34 extra coverage: enabled
2020/06/16 22:56:34 setuid sandbox: enabled
2020/06/16 22:56:34 namespace sandbox: enabled
2020/06/16 22:56:34 Android sandbox: /sys/fs/selinux/policy does not exist
2020/06/16 22:56:34 fault injection: enabled
2020/06/16 22:56:34 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/06/16 22:56:34 net packet injection: enabled
2020/06/16 22:56:34 net device setup: enabled
2020/06/16 22:56:34 concurrency sanitizer: enabled
2020/06/16 22:56:34 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/06/16 22:56:34 USB emulation: enabled
2020/06/16 22:56:34 suppressing KCSAN reports in functions: 'alloc_pid' 
syzkaller login: [   50.993310][ T8910] ==================================================================
[   51.001463][ T8910] BUG: KCSAN: data-race in ep_poll / ep_poll_callback
[   51.008209][ T8910] 
[   51.010568][ T8910] write to 0xffff88812694a710 of 8 bytes by interrupt on cpu 0:
[   51.018198][ T8910]  ep_poll_callback+0x5f2/0x6c0
[   51.023035][ T8910]  __wake_up_common+0x76/0x180
[   51.027776][ T8910]  __wake_up_common_lock+0x77/0xb0
[   51.032877][ T8910]  sock_def_readable+0x9d/0x130
[   51.037724][ T8910]  tcp_data_ready+0x76/0xc0
[   51.042207][ T8910]  tcp_rcv_established+0xcb8/0xee0
[   51.047289][ T8910]  tcp_v4_do_rcv+0x396/0x4f0
[   51.051872][ T8910]  tcp_v4_rcv+0x1c55/0x1e10
[   51.056371][ T8910]  ip_protocol_deliver_rcu+0x4b/0x410
[   51.061759][ T8910]  ip_local_deliver_finish+0xf3/0x120
[   51.067127][ T8910]  ip_local_deliver+0x135/0x220
[   51.071988][ T8910]  ip_sublist_rcv_finish+0xf0/0x140
[   51.077197][ T8910]  ip_sublist_rcv+0x3f8/0x530
[   51.081880][ T8910]  ip_list_rcv+0x2f3/0x321
[   51.086304][ T8910]  __netif_receive_skb_list_core+0x368/0x5c0
[   51.092316][ T8910]  netif_receive_skb_list_internal+0x5c7/0x810
[   51.098487][ T8910]  gro_normal_list.part.0+0x37/0xa0
[   51.103787][ T8910]  gro_normal_one+0x14c/0x160
[   51.108484][ T8910]  napi_gro_receive+0x27d/0x2f0
[   51.113347][ T8910]  receive_buf+0x24c/0x3420
[   51.117859][ T8910]  virtnet_poll+0x343/0x790
[   51.122389][ T8910]  net_rx_action+0x3ad/0xac0
[   51.126985][ T8910]  __do_softirq+0x118/0x34a
[   51.131496][ T8910]  run_ksoftirqd+0x41/0x60
[   51.135911][ T8910]  smpboot_thread_fn+0x374/0x4a0
[   51.140845][ T8910]  kthread+0x203/0x230
[   51.144920][ T8910]  ret_from_fork+0x1f/0x30
[   51.149337][ T8910] 
[   51.151663][ T8910] read to 0xffff88812694a710 of 8 bytes by task 8910 on cpu 1:
[   51.159200][ T8910]  ep_poll+0x5ad/0x910
[   51.163274][ T8910]  do_epoll_wait+0x15a/0x180
[   51.167890][ T8910]  __x64_sys_epoll_pwait+0xc6/0x170
[   51.173456][ T8910]  do_syscall_64+0xc7/0x3b0
[   51.177973][ T8910]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   51.183939][ T8910] 
[   51.186252][ T8910] Reported by Kernel Concurrency Sanitizer on:
[   51.192406][ T8910] CPU: 1 PID: 8910 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[   51.200991][ T8910] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   51.211038][ T8910] ==================================================================
[   51.219176][ T8910] Kernel panic - not syncing: panic_on_warn set ...
[   51.225759][ T8910] CPU: 1 PID: 8910 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[   51.234512][ T8910] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   51.244556][ T8910] Call Trace:
[   51.247864][ T8910]  dump_stack+0x11d/0x187
[   51.252234][ T8910]  panic+0x210/0x640
[   51.256149][ T8910]  ? vprintk_func+0x89/0x13a
[   51.260734][ T8910]  kcsan_report.cold+0xc/0x1a
[   51.265420][ T8910]  kcsan_setup_watchpoint+0x3fb/0x440
[   51.270968][ T8910]  ep_poll+0x5ad/0x910
[   51.275078][ T8910]  ? wake_up_q+0x90/0x90
[   51.279319][ T8910]  do_epoll_wait+0x15a/0x180
[   51.283901][ T8910]  __x64_sys_epoll_pwait+0xc6/0x170
[   51.289083][ T8910]  do_syscall_64+0xc7/0x3b0
[   51.293595][ T8910]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   51.299467][ T8910] RIP: 0033:0x469240
[   51.303369][ 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
[   51.323091][ T8910] RSP: 002b:000000c0000f57f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000119
[   51.331488][ T8910] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000469240
[   51.339443][ T8910] RDX: 0000000000000080 RSI: 000000c0000f5840 RDI: 0000000000000003
[   51.347398][ T8910] RBP: 000000c0000f5e40 R08: 0000000000000000 R09: 0000000000000000
[   51.355355][ T8910] R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000003
[   51.363320][ T8910] R13: 000000c000001380 R14: 0000000000000002 R15: 0000000000000002
[   51.372877][ T8910] Kernel Offset: disabled
[   51.377265][ T8910] Rebooting in 86400 seconds..