[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.
         Starting Load/Save RF Kill Switch Status...
[  OK  ] Started Load/Save RF Kill Switch Status.


Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.1.28' (ECDSA) to the list of known hosts.
2020/06/07 21:01:15 fuzzer started
2020/06/07 21:01:15 dialing manager at 10.128.0.105:40519
2020/06/07 21:01:15 syscalls: 3055
2020/06/07 21:01:15 code coverage: enabled
2020/06/07 21:01:15 comparison tracing: enabled
2020/06/07 21:01:15 extra coverage: enabled
2020/06/07 21:01:15 setuid sandbox: enabled
2020/06/07 21:01:15 namespace sandbox: enabled
2020/06/07 21:01:15 Android sandbox: /sys/fs/selinux/policy does not exist
2020/06/07 21:01:15 fault injection: enabled
2020/06/07 21:01:15 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/06/07 21:01:15 net packet injection: enabled
2020/06/07 21:01:15 net device setup: enabled
2020/06/07 21:01:15 concurrency sanitizer: enabled
2020/06/07 21:01:15 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/06/07 21:01:15 USB emulation: enabled
syzkaller login: [   52.463494][ T8921] KCSAN: could not find function: '_find_next_bit'
2020/06/07 21:01:16 adding functions to KCSAN blacklist: '__ext4_new_inode' '_find_next_bit' 'ext4_free_inodes_count' 'find_get_pages_range_tag' 'ep_poll' '__mpage_writepage' 'run_timer_softirq' 
[   55.266963][ T8920] ==================================================================
[   55.275251][ T8920] BUG: KCSAN: data-race in __send_signal / futex_wait_queue_me
[   55.282777][ T8920] 
[   55.285098][ T8920] write to 0xffff88812686e064 of 4 bytes by task 8909 on cpu 1:
[   55.292716][ T8920]  futex_wait_queue_me+0x17d/0x290
[   55.297908][ T8920]  futex_wait+0x17e/0x3a0
[   55.302239][ T8920]  do_futex+0xe2/0x15b0
[   55.306460][ T8920]  __x64_sys_futex+0x2dc/0x410
[   55.311228][ T8920]  do_syscall_64+0xc7/0x3b0
[   55.315720][ T8920]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   55.322030][ T8920] 
[   55.324839][ T8920] read to 0xffff88812686e064 of 4 bytes by task 8920 on cpu 0:
[   55.333203][ T8920]  __send_signal+0x468/0x8a0
[   55.338509][ T8920]  send_signal+0x211/0x2a0
[   55.343134][ T8920]  do_send_sig_info+0x59/0xc0
[   55.347789][ T8920]  do_send_specific+0xd8/0x100
[   55.352633][ T8920]  do_tkill+0xf8/0x130
[   55.356717][ T8920]  __x64_sys_tgkill+0x6d/0x90
[   55.361544][ T8920]  do_syscall_64+0xc7/0x3b0
[   55.366030][ T8920]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   55.371981][ T8920] 
[   55.374284][ T8920] Reported by Kernel Concurrency Sanitizer on:
[   55.380423][ T8920] CPU: 0 PID: 8920 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[   55.388639][ T8920] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   55.399739][ T8920] ==================================================================
[   55.407782][ T8920] Kernel panic - not syncing: panic_on_warn set ...
[   55.414345][ T8920] CPU: 0 PID: 8920 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[   55.422930][ T8920] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   55.432967][ T8920] Call Trace:
[   55.437442][ T8920]  dump_stack+0x11d/0x187
[   55.441752][ T8920]  panic+0x210/0x640
[   55.445652][ T8920]  ? vprintk_func+0x89/0x13a
[   55.450410][ T8920]  kcsan_report.cold+0xc/0x1a
[   55.455171][ T8920]  kcsan_setup_watchpoint+0x3fb/0x440
[   55.460854][ T8920]  __send_signal+0x468/0x8a0
[   55.465640][ T8920]  send_signal+0x211/0x2a0
[   55.470049][ T8920]  do_send_sig_info+0x59/0xc0
[   55.474718][ T8920]  do_send_specific+0xd8/0x100
[   55.480368][ T8920]  do_tkill+0xf8/0x130
[   55.484436][ T8920]  __x64_sys_tgkill+0x6d/0x90
[   55.489114][ T8920]  do_syscall_64+0xc7/0x3b0
[   55.493647][ T8920]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   55.499524][ T8920] RIP: 0033:0x468b26
[   55.503415][ 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
[   55.523188][ T8920] RSP: 002b:000000c00039beb0 EFLAGS: 00000246 ORIG_RAX: 00000000000000ea
[   55.532541][ T8920] RAX: ffffffffffffffda RBX: 000000c000000180 RCX: 0000000000468b26
[   55.541562][ T8920] RDX: 0000000000000017 RSI: 00000000000022cd RDI: 00000000000022ca
[   55.550040][ T8920] RBP: 000000c00039bed0 R08: 0000000000000000 R09: 0000000000000000
[   55.558447][ T8920] R10: 000000c00039bec0 R11: 0000000000000246 R12: 0000000000000055
[   55.566623][ T8920] R13: 0000000000000020 R14: 00000000000004c1 R15: ffffffffffffffff
[   56.658175][ T8920] Shutting down cpus with NMI
[   56.664236][ T8920] Kernel Offset: disabled
[   56.668554][ T8920] Rebooting in 86400 seconds..