[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.
[   22.210905][    C1] random: crng init done
[   22.215160][    C1] random: 7 urandom warning(s) missed due to ratelimiting


Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.224' (ECDSA) to the list of known hosts.
2020/06/18 14:10:20 fuzzer started
2020/06/18 14:10:20 dialing manager at 10.128.0.105:45279
2020/06/18 14:10:20 syscalls: 3090
2020/06/18 14:10:20 code coverage: enabled
2020/06/18 14:10:20 comparison tracing: enabled
2020/06/18 14:10:20 extra coverage: enabled
2020/06/18 14:10:20 setuid sandbox: enabled
2020/06/18 14:10:20 namespace sandbox: enabled
2020/06/18 14:10:20 Android sandbox: /sys/fs/selinux/policy does not exist
2020/06/18 14:10:20 fault injection: enabled
2020/06/18 14:10:20 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/06/18 14:10:20 net packet injection: enabled
2020/06/18 14:10:20 net device setup: enabled
2020/06/18 14:10:20 concurrency sanitizer: enabled
2020/06/18 14:10:20 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/06/18 14:10:20 USB emulation: enabled
2020/06/18 14:10:21 suppressing KCSAN reports in functions: '__find_get_block' 'alloc_pid' 'do_epoll_wait' '__ext4_new_inode' 'vfs_readlink' 'generic_write_end' '__xa_clear_mark' 'page_counter_charge' 'blk_mq_dispatch_rq_list' '__mod_timer' 'kcm_rfree' 
syzkaller login: [   34.597153][ T8659] ==================================================================
[   34.605364][ T8659] BUG: KCSAN: data-race in __send_signal / futex_wait_queue_me
[   34.612996][ T8659] 
[   34.615301][ T8659] write to 0xffff888121afb024 of 4 bytes by task 8672 on cpu 1:
[   34.622944][ T8659]  futex_wait_queue_me+0x186/0x250
[   34.628025][ T8659]  futex_wait+0x153/0x3a0
[   34.632320][ T8659]  do_futex+0x144a/0x21b0
[   34.636701][ T8659]  __se_sys_futex+0x26d/0x330
[   34.641358][ T8659]  __x64_sys_futex+0x74/0x80
[   34.645910][ T8659]  do_syscall_64+0x71/0x120
[   34.650389][ T8659]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   34.656241][ T8659] 
[   34.658539][ T8659] read to 0xffff888121afb024 of 4 bytes by task 8659 on cpu 0:
[   34.666167][ T8659]  __send_signal+0x26d/0x7d0
[   34.670729][ T8659]  send_signal+0x398/0x3e0
[   34.675130][ T8659]  do_send_sig_info+0x9b/0xe0
[   34.679787][ T8659]  do_send_specific+0xc7/0x100
[   34.684626][ T8659]  __x64_sys_tgkill+0x108/0x140
[   34.689452][ T8659]  do_syscall_64+0x71/0x120
[   34.693924][ T8659]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   34.699778][ T8659] 
[   34.702072][ T8659] Reported by Kernel Concurrency Sanitizer on:
[   34.708197][ T8659] CPU: 0 PID: 8659 Comm: syz-fuzzer Not tainted 5.8.0-rc1-syzkaller #0
[   34.716394][ T8659] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   34.726415][ T8659] ==================================================================
[   34.734441][ T8659] Kernel panic - not syncing: panic_on_warn set ...
[   34.740992][ T8659] CPU: 0 PID: 8659 Comm: syz-fuzzer Not tainted 5.8.0-rc1-syzkaller #0
[   34.749201][ T8659] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   34.759223][ T8659] Call Trace:
[   34.762492][ T8659]  dump_stack+0x10f/0x19d
[   34.766787][ T8659]  panic+0x1f8/0x63a
[   34.770649][ T8659]  ? vprintk_emit+0x44a/0x4f0
[   34.775305][ T8659]  kcsan_report+0x684/0x690
[   34.779779][ T8659]  ? kcsan_setup_watchpoint+0x453/0x4d0
[   34.785289][ T8659]  ? __send_signal+0x26d/0x7d0
[   34.790017][ T8659]  ? send_signal+0x398/0x3e0
[   34.794568][ T8659]  ? do_send_sig_info+0x9b/0xe0
[   34.799405][ T8659]  ? do_send_specific+0xc7/0x100
[   34.804408][ T8659]  ? __x64_sys_tgkill+0x108/0x140
[   34.809398][ T8659]  ? do_syscall_64+0x71/0x120
[   34.814044][ T8659]  ? entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   34.820081][ T8659]  ? check_preemption_disabled+0x3f/0x1a0
[   34.825778][ T8659]  ? run_posix_cpu_timers+0x1c8/0x790
[   34.831114][ T8659]  ? acpi_register_gsi_xen+0xf0/0x140
[   34.836449][ T8659]  ? check_preemption_disabled+0x3f/0x1a0
[   34.842142][ T8659]  kcsan_setup_watchpoint+0x453/0x4d0
[   34.847478][ T8659]  __send_signal+0x26d/0x7d0
[   34.852033][ T8659]  send_signal+0x398/0x3e0
[   34.856424][ T8659]  do_send_sig_info+0x9b/0xe0
[   34.861067][ T8659]  do_send_specific+0xc7/0x100
[   34.865808][ T8659]  __x64_sys_tgkill+0x108/0x140
[   34.870635][ T8659]  do_syscall_64+0x71/0x120
[   34.875118][ T8659]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   34.880984][ T8659] RIP: 0033:0x468b26
[   34.884839][ T8659] Code: Bad RIP value.
[   34.888869][ T8659] RSP: 002b:000000c00004fed8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ea
[   34.897256][ T8659] RAX: ffffffffffffffda RBX: 000000c000000180 RCX: 0000000000468b26
[   34.905194][ T8659] RDX: 0000000000000017 RSI: 00000000000021e0 RDI: 00000000000021d1
[   34.913139][ T8659] RBP: 000000c00004fef8 R08: 000000143593a74a R09: 00007ffea71f2080
[   34.921082][ T8659] R10: 0000000000000010 R11: 0000000000000246 R12: 00000000010ba020
[   34.929020][ T8659] R13: 000000c000000900 R14: 0000000000abc621 R15: 0000000000000000
[   34.938099][ T8659] Kernel Offset: disabled
[   34.942401][ T8659] Rebooting in 86400 seconds..