[  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 '10.128.0.44' (ECDSA) to the list of known hosts.
2020/06/04 13:21:45 fuzzer started
2020/06/04 13:21:45 dialing manager at 10.128.0.105:43989
2020/06/04 13:21:46 syscalls: 3055
2020/06/04 13:21:46 code coverage: enabled
2020/06/04 13:21:46 comparison tracing: enabled
2020/06/04 13:21:46 extra coverage: enabled
2020/06/04 13:21:46 setuid sandbox: enabled
2020/06/04 13:21:46 namespace sandbox: enabled
2020/06/04 13:21:46 Android sandbox: /sys/fs/selinux/policy does not exist
2020/06/04 13:21:46 fault injection: enabled
2020/06/04 13:21:46 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/06/04 13:21:46 net packet injection: enabled
2020/06/04 13:21:46 net device setup: enabled
2020/06/04 13:21:46 concurrency sanitizer: enabled
2020/06/04 13:21:46 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/06/04 13:21:46 USB emulation: enabled
2020/06/04 13:21:48 adding functions to KCSAN blacklist: 'copy_process' 'generic_write_end' 'do_nanosleep' 'page_counter_charge' 'find_get_pages_range_tag' 'generic_fillattr' '__send_signal' 'ep_poll' '__ext4_new_inode' 'snd_rawmidi_kernel_write1' 
syzkaller login: [   54.579528][ T8905] ==================================================================
[   54.587811][ T8905] BUG: KCSAN: data-race in complete_signal / futex_wait_queue_me
[   54.595538][ T8905] 
[   54.597847][ T8905] write to 0xffff88812ae04024 of 4 bytes by task 8906 on cpu 0:
[   54.605517][ T8905]  futex_wait_queue_me+0x17d/0x290
[   54.610601][ T8905]  futex_wait+0x17e/0x3a0
[   54.614963][ T8905]  do_futex+0xe2/0x15b0
[   54.619105][ T8905]  __x64_sys_futex+0x2dc/0x410
[   54.623844][ T8905]  do_syscall_64+0xc7/0x3b0
[   54.628322][ T8905]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   54.634234][ T8905] 
[   54.636587][ T8905] read to 0xffff88812ae04024 of 4 bytes by task 8905 on cpu 1:
[   54.644104][ T8905]  complete_signal+0x85/0x5c0
[   54.648753][ T8905]  __send_signal+0x675/0x8a0
[   54.653317][ T8905]  send_signal+0x211/0x2a0
[   54.657721][ T8905]  do_send_sig_info+0x59/0xc0
[   54.662481][ T8905]  do_send_specific+0xd8/0x100
[   54.667228][ T8905]  do_tkill+0xf8/0x130
[   54.671288][ T8905]  __x64_sys_tgkill+0x6d/0x90
[   54.675952][ T8905]  do_syscall_64+0xc7/0x3b0
[   54.680431][ T8905]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   54.686290][ T8905] 
[   54.688588][ T8905] Reported by Kernel Concurrency Sanitizer on:
[   54.694737][ T8905] CPU: 1 PID: 8905 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[   54.702955][ T8905] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   54.712987][ T8905] ==================================================================
[   54.721035][ T8905] Kernel panic - not syncing: panic_on_warn set ...
[   54.727609][ T8905] CPU: 1 PID: 8905 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[   54.736008][ T8905] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   54.746294][ T8905] Call Trace:
[   54.749579][ T8905]  dump_stack+0x11d/0x187
[   54.753889][ T8905]  panic+0x210/0x640
[   54.757775][ T8905]  ? vprintk_func+0x89/0x13a
[   54.762343][ T8905]  kcsan_report.cold+0xc/0x1a
[   54.767004][ T8905]  kcsan_setup_watchpoint+0x3fb/0x440
[   54.772368][ T8905]  complete_signal+0x85/0x5c0
[   54.777097][ T8905]  ? __sigqueue_alloc+0x190/0x2c0
[   54.782135][ T8905]  ? __sanitizer_cov_trace_switch+0x45/0x70
[   54.788009][ T8905]  __send_signal+0x675/0x8a0
[   54.792598][ T8905]  send_signal+0x211/0x2a0
[   54.797005][ T8905]  do_send_sig_info+0x59/0xc0
[   54.801658][ T8905]  do_send_specific+0xd8/0x100
[   54.806398][ T8905]  do_tkill+0xf8/0x130
[   54.810460][ T8905]  __x64_sys_tgkill+0x6d/0x90
[   54.815114][ T8905]  do_syscall_64+0xc7/0x3b0
[   54.819597][ T8905]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   54.825464][ T8905] RIP: 0033:0x468b26
[   54.829339][ T8905] Code: cc cc cc cc b8 27 00 00 00 0f 05 48 89 44 24 08 c3 cc cc cc 48 8b 7c 24 08 48 8b 74 24 10 48 8b 54 24 18 b8 ea 00 00 00 0f 05 <c3> cc cc cc cc cc cc cc cc cc 8b 7c 24 08 48 8b 74 24 10 48 8b 54
[   54.848918][ T8905] RSP: 002b:000000c00004feb0 EFLAGS: 00000246 ORIG_RAX: 00000000000000ea
[   54.857339][ T8905] RAX: ffffffffffffffda RBX: 000000c000000180 RCX: 0000000000468b26
[   54.865304][ T8905] RDX: 0000000000000017 RSI: 00000000000022ca RDI: 00000000000022c7
[   54.873284][ T8905] RBP: 000000c00004fed0 R08: 0000000000000000 R09: 0000000000000036
[   54.881235][ T8905] R10: 00007f7cb8a64968 R11: 0000000000000246 R12: 000000c000162ab0
[   54.889192][ T8905] R13: 0000000000000022 R14: 00000000000000d9 R15: ffffffffffffffff
[   55.974578][ T8905] Shutting down cpus with NMI
[   55.980698][ T8905] Kernel Offset: disabled
[   55.985012][ T8905] Rebooting in 86400 seconds..