[  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 '10.128.0.28' (ECDSA) to the list of known hosts.
2020/06/04 01:10:27 fuzzer started
2020/06/04 01:10:28 dialing manager at 10.128.0.105:35977
2020/06/04 01:10:28 syscalls: 3055
2020/06/04 01:10:28 code coverage: enabled
2020/06/04 01:10:28 comparison tracing: enabled
2020/06/04 01:10:28 extra coverage: enabled
2020/06/04 01:10:28 setuid sandbox: enabled
2020/06/04 01:10:28 namespace sandbox: enabled
2020/06/04 01:10:28 Android sandbox: /sys/fs/selinux/policy does not exist
2020/06/04 01:10:28 fault injection: enabled
2020/06/04 01:10:28 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/06/04 01:10:28 net packet injection: enabled
2020/06/04 01:10:28 net device setup: enabled
2020/06/04 01:10:28 concurrency sanitizer: enabled
2020/06/04 01:10:28 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/06/04 01:10:28 USB emulation: enabled
2020/06/04 01:10:29 adding functions to KCSAN blacklist: 'page_counter_charge' 'find_get_pages_range_tag' 'run_timer_softirq' 'pcpu_alloc' 'ep_poll' 'ext4_free_inodes_count' 'tick_sched_do_timer' 
syzkaller login: [   54.292651][ T8905] ==================================================================
[   54.301338][ T8905] BUG: KCSAN: data-race in complete_signal / futex_wait_queue_me
[   54.309027][ T8905] 
[   54.311353][ T8905] write to 0xffff8881269c9024 of 4 bytes by task 8903 on cpu 1:
[   54.319067][ T8905]  futex_wait_queue_me+0x17d/0x290
[   54.324178][ T8905]  futex_wait+0x17e/0x3a0
[   54.328480][ T8905]  do_futex+0xe2/0x15b0
[   54.332622][ T8905]  __x64_sys_futex+0x2dc/0x410
[   54.337394][ T8905]  do_syscall_64+0xc7/0x3b0
[   54.341883][ T8905]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   54.347761][ T8905] 
[   54.350093][ T8905] read to 0xffff8881269c9024 of 4 bytes by task 8905 on cpu 0:
[   54.357622][ T8905]  complete_signal+0x85/0x5c0
[   54.362289][ T8905]  __send_signal+0x675/0x8a0
[   54.366951][ T8905]  send_signal+0x211/0x2a0
[   54.371352][ T8905]  do_send_sig_info+0x59/0xc0
[   54.376093][ T8905]  do_send_specific+0xd8/0x100
[   54.381185][ T8905]  do_tkill+0xf8/0x130
[   54.385243][ T8905]  __x64_sys_tgkill+0x6d/0x90
[   54.389895][ T8905]  do_syscall_64+0xc7/0x3b0
[   54.394679][ T8905]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   54.400552][ T8905] 
[   54.402858][ T8905] Reported by Kernel Concurrency Sanitizer on:
[   54.409200][ T8905] CPU: 0 PID: 8905 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[   54.417607][ T8905] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   54.427655][ T8905] ==================================================================
[   54.435699][ T8905] Kernel panic - not syncing: panic_on_warn set ...
[   54.442282][ T8905] CPU: 0 PID: 8905 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[   54.450489][ T8905] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   54.461472][ T8905] Call Trace:
[   54.464843][ T8905]  dump_stack+0x11d/0x187
[   54.469162][ T8905]  panic+0x210/0x640
[   54.473038][ T8905]  ? vprintk_func+0x89/0x13a
[   54.477606][ T8905]  kcsan_report.cold+0xc/0x1a
[   54.482285][ T8905]  kcsan_setup_watchpoint+0x3fb/0x440
[   54.487664][ T8905]  complete_signal+0x85/0x5c0
[   54.492337][ T8905]  ? __sigqueue_alloc+0x190/0x2c0
[   54.497430][ T8905]  ? __sanitizer_cov_trace_switch+0x45/0x70
[   54.503400][ T8905]  __send_signal+0x675/0x8a0
[   54.507983][ T8905]  send_signal+0x211/0x2a0
[   54.512525][ T8905]  do_send_sig_info+0x59/0xc0
[   54.517185][ T8905]  do_send_specific+0xd8/0x100
[   54.521993][ T8905]  do_tkill+0xf8/0x130
[   54.526085][ T8905]  __x64_sys_tgkill+0x6d/0x90
[   54.530751][ T8905]  do_syscall_64+0xc7/0x3b0
[   54.535234][ T8905]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   54.541159][ T8905] RIP: 0033:0x468b26
[   54.545054][ 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
[   54.565952][ T8905] RSP: 002b:000000c0000f1ed8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ea
[   54.574337][ T8905] RAX: ffffffffffffffda RBX: 000000c000000180 RCX: 0000000000468b26
[   54.582295][ T8905] RDX: 0000000000000017 RSI: 00000000000022c7 RDI: 00000000000022c4
[   54.590605][ T8905] RBP: 000000c0000f1ef8 R08: 00007ffdd0c79080 R09: 0000000000000036
[   54.598558][ T8905] R10: 000000c0000f1ec0 R11: 0000000000000246 R12: 0000000000000011
[   54.606531][ T8905] R13: 0000000000e52de0 R14: 0000000000000000 R15: 0000000000000000
[   54.615867][ T8905] Kernel Offset: disabled
[   54.620208][ T8905] Rebooting in 86400 seconds..