[  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 '10.128.10.18' (ECDSA) to the list of known hosts.
2020/06/13 04:45:22 fuzzer started
2020/06/13 04:45:22 dialing manager at 10.128.0.105:39701
2020/06/13 04:45:23 syscalls: 3085
2020/06/13 04:45:23 code coverage: enabled
2020/06/13 04:45:23 comparison tracing: enabled
2020/06/13 04:45:23 extra coverage: enabled
2020/06/13 04:45:23 setuid sandbox: enabled
2020/06/13 04:45:23 namespace sandbox: enabled
2020/06/13 04:45:23 Android sandbox: /sys/fs/selinux/policy does not exist
2020/06/13 04:45:23 fault injection: enabled
2020/06/13 04:45:23 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/06/13 04:45:23 net packet injection: enabled
2020/06/13 04:45:23 net device setup: enabled
2020/06/13 04:45:23 concurrency sanitizer: enabled
2020/06/13 04:45:23 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/06/13 04:45:23 USB emulation: enabled
2020/06/13 04:45:24 adding functions to KCSAN blacklist: 'alloc_pid' 'find_get_pages_range_tag' 'ep_poll' 'echo_char' 'generic_fillattr' 
syzkaller login: [   55.840596][ T8920] ==================================================================
[   55.848944][ T8920] BUG: KCSAN: data-race in __send_signal / futex_wait_queue_me
[   55.856460][ T8920] 
[   55.858785][ T8920] write to 0xffff8881269ef064 of 4 bytes by task 8918 on cpu 0:
[   55.866390][ T8920]  futex_wait_queue_me+0x17d/0x290
[   55.871493][ T8920]  futex_wait+0x17e/0x3a0
[   55.875810][ T8920]  do_futex+0xe2/0x15b0
[   55.879958][ T8920]  __x64_sys_futex+0x2dc/0x410
[   55.884709][ T8920]  do_syscall_64+0xc7/0x3b0
[   55.889286][ T8920]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   55.895145][ T8920] 
[   55.897475][ T8920] read to 0xffff8881269ef064 of 4 bytes by task 8920 on cpu 1:
[   55.904994][ T8920]  __send_signal+0x468/0x8a0
[   55.910630][ T8920]  send_signal+0x211/0x2a0
[   55.915036][ T8920]  do_send_sig_info+0x59/0xc0
[   55.919816][ T8920]  do_send_specific+0xd8/0x100
[   55.924570][ T8920]  do_tkill+0xf8/0x130
[   55.928714][ T8920]  __x64_sys_tgkill+0x6d/0x90
[   55.933387][ T8920]  do_syscall_64+0xc7/0x3b0
[   55.937878][ T8920]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   55.944171][ T8920] 
[   55.946471][ T8920] Reported by Kernel Concurrency Sanitizer on:
[   55.952599][ T8920] CPU: 1 PID: 8920 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[   55.964632][ T8920] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   55.974945][ T8920] ==================================================================
[   55.983011][ T8920] Kernel panic - not syncing: panic_on_warn set ...
[   55.989580][ T8920] CPU: 1 PID: 8920 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[   55.997799][ T8920] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   56.008437][ T8920] Call Trace:
[   56.011711][ T8920]  dump_stack+0x11d/0x187
[   56.016026][ T8920]  panic+0x210/0x640
[   56.019904][ T8920]  ? vprintk_func+0x89/0x13a
[   56.024487][ T8920]  kcsan_report.cold+0xc/0x1a
[   56.029155][ T8920]  kcsan_setup_watchpoint+0x3fb/0x440
[   56.034692][ T8920]  __send_signal+0x468/0x8a0
[   56.039260][ T8920]  send_signal+0x211/0x2a0
[   56.043657][ T8920]  do_send_sig_info+0x59/0xc0
[   56.048312][ T8920]  do_send_specific+0xd8/0x100
[   56.053053][ T8920]  do_tkill+0xf8/0x130
[   56.057124][ T8920]  __x64_sys_tgkill+0x6d/0x90
[   56.061790][ T8920]  do_syscall_64+0xc7/0x3b0
[   56.066282][ T8920]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   56.072150][ T8920] RIP: 0033:0x468b26
[   56.076385][ T8920] 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
[   56.095975][ T8920] RSP: 002b:000000c00004feb0 EFLAGS: 00000246 ORIG_RAX: 00000000000000ea
[   56.104378][ T8920] RAX: ffffffffffffffda RBX: 000000c000000180 RCX: 0000000000468b26
[   56.112354][ T8920] RDX: 0000000000000017 RSI: 00000000000022d6 RDI: 00000000000022d6
[   56.120313][ T8920] RBP: 000000c00004fed0 R08: 0000000000000000 R09: 0000000000000037
[   56.128405][ T8920] R10: 00007f648dd92968 R11: 0000000000000246 R12: 0000000000000074
[   56.136368][ T8920] R13: 0000000000e5e200 R14: 0000000000000000 R15: 0000000000000000
[   56.145805][ T8920] Kernel Offset: disabled
[   56.150119][ T8920] Rebooting in 86400 seconds..