[  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 '10.128.0.108' (ECDSA) to the list of known hosts.
2020/06/13 11:14:07 fuzzer started
2020/06/13 11:14:07 dialing manager at 10.128.0.105:43693
2020/06/13 11:14:08 syscalls: 3085
2020/06/13 11:14:08 code coverage: enabled
2020/06/13 11:14:08 comparison tracing: enabled
2020/06/13 11:14:08 extra coverage: enabled
2020/06/13 11:14:08 setuid sandbox: enabled
2020/06/13 11:14:08 namespace sandbox: enabled
2020/06/13 11:14:08 Android sandbox: /sys/fs/selinux/policy does not exist
2020/06/13 11:14:08 fault injection: enabled
2020/06/13 11:14:08 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/06/13 11:14:08 net packet injection: enabled
2020/06/13 11:14:08 net device setup: enabled
2020/06/13 11:14:08 concurrency sanitizer: enabled
2020/06/13 11:14:08 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/06/13 11:14:08 USB emulation: enabled
syzkaller login: [   49.785633][ T8919] KCSAN: could not find function: '_find_next_bit'
2020/06/13 11:14:09 adding functions to KCSAN blacklist: '_find_next_bit' 'ext4_free_inodes_count' '__ext4_new_inode' 'copy_process' 'find_get_pages_range_tag' 
[   53.096373][ T8907] ==================================================================
[   53.104493][ T8907] BUG: KCSAN: data-race in ep_poll / ep_poll_callback
[   53.111239][ T8907] 
[   53.113566][ T8907] write to 0xffff888128ce3050 of 8 bytes by interrupt on cpu 1:
[   53.121213][ T8907]  ep_poll_callback+0x5f2/0x6c0
[   53.126086][ T8907]  __wake_up_common+0x76/0x180
[   53.130848][ T8907]  __wake_up_common_lock+0x77/0xb0
[   53.135999][ T8907]  sock_def_readable+0x9d/0x130
[   53.140881][ T8907]  tcp_data_ready+0x76/0xc0
[   53.145407][ T8907]  tcp_rcv_established+0xcb8/0xee0
[   53.150496][ T8907]  tcp_v4_do_rcv+0x396/0x4f0
[   53.155062][ T8907]  tcp_v4_rcv+0x1c55/0x1e10
[   53.159543][ T8907]  ip_protocol_deliver_rcu+0x4b/0x410
[   53.164891][ T8907]  ip_local_deliver_finish+0xf3/0x120
[   53.170239][ T8907]  ip_local_deliver+0x135/0x220
[   53.175119][ T8907]  ip_sublist_rcv_finish+0xf0/0x140
[   53.180334][ T8907]  ip_sublist_rcv+0x3f8/0x530
[   53.184991][ T8907]  ip_list_rcv+0x2f3/0x321
[   53.189435][ T8907]  __netif_receive_skb_list_core+0x368/0x5c0
[   53.195445][ T8907]  netif_receive_skb_list_internal+0x5c7/0x810
[   53.201622][ T8907]  gro_normal_list.part.0+0x37/0xa0
[   53.206802][ T8907]  gro_normal_one+0x14c/0x160
[   53.211460][ T8907]  napi_gro_receive+0x27d/0x2f0
[   53.216307][ T8907]  receive_buf+0x24c/0x3420
[   53.220842][ T8907]  virtnet_poll+0x343/0x790
[   53.225359][ T8907]  net_rx_action+0x3ad/0xac0
[   53.229928][ T8907]  __do_softirq+0x118/0x34a
[   53.234409][ T8907]  run_ksoftirqd+0x41/0x60
[   53.238803][ T8907]  smpboot_thread_fn+0x374/0x4a0
[   53.243718][ T8907]  kthread+0x203/0x230
[   53.247766][ T8907]  ret_from_fork+0x1f/0x30
[   53.252153][ T8907] 
[   53.254483][ T8907] read to 0xffff888128ce3050 of 8 bytes by task 8907 on cpu 0:
[   53.262018][ T8907]  ep_poll+0x8f/0x910
[   53.266081][ T8907]  do_epoll_wait+0x15a/0x180
[   53.270650][ T8907]  __x64_sys_epoll_pwait+0xc6/0x170
[   53.275841][ T8907]  do_syscall_64+0xc7/0x3b0
[   53.280345][ T8907]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   53.286224][ T8907] 
[   53.288528][ T8907] Reported by Kernel Concurrency Sanitizer on:
[   53.294678][ T8907] CPU: 0 PID: 8907 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[   53.302888][ T8907] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   53.312934][ T8907] ==================================================================
[   53.321067][ T8907] Kernel panic - not syncing: panic_on_warn set ...
[   53.327651][ T8907] CPU: 0 PID: 8907 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[   53.335922][ T8907] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   53.346104][ T8907] Call Trace:
[   53.349379][ T8907]  dump_stack+0x11d/0x187
[   53.353710][ T8907]  panic+0x210/0x640
[   53.357603][ T8907]  ? vprintk_func+0x89/0x13a
[   53.362184][ T8907]  kcsan_report.cold+0xc/0x1a
[   53.366857][ T8907]  kcsan_setup_watchpoint+0x3fb/0x440
[   53.372212][ T8907]  ep_poll+0x8f/0x910
[   53.376178][ T8907]  ? __fget_files+0xa2/0x1c0
[   53.380751][ T8907]  ? __fget_light+0xc0/0x1a0
[   53.385332][ T8907]  do_epoll_wait+0x15a/0x180
[   53.389971][ T8907]  __x64_sys_epoll_pwait+0xc6/0x170
[   53.395156][ T8907]  do_syscall_64+0xc7/0x3b0
[   53.399650][ T8907]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   53.405524][ T8907] RIP: 0033:0x469240
[   53.409408][ T8907] 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
[   53.428992][ T8907] RSP: 002b:000000c00004f7f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000119
[   53.437396][ T8907] RAX: ffffffffffffffda RBX: 0000000000000122 RCX: 0000000000469240
[   53.445355][ T8907] RDX: 0000000000000080 RSI: 000000c00004f840 RDI: 0000000000000003
[   53.453317][ T8907] RBP: 000000c00004fe40 R08: 0000000000000000 R09: 0000000000000000
[   53.461272][ T8907] R10: 0000000000000122 R11: 0000000000000246 R12: 0000000000000003
[   53.469225][ T8907] R13: 000000c000000900 R14: 0000000000000002 R15: 0000000000000002
[   53.479345][ T8907] Kernel Offset: disabled
[   53.483677][ T8907] Rebooting in 86400 seconds..