[ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ 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. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.143' (ECDSA) to the list of known hosts. 2020/06/16 11:00:06 fuzzer started 2020/06/16 11:00:07 dialing manager at 10.128.0.105:37643 2020/06/16 11:00:07 syscalls: 3085 2020/06/16 11:00:07 code coverage: enabled 2020/06/16 11:00:07 comparison tracing: enabled 2020/06/16 11:00:07 extra coverage: enabled 2020/06/16 11:00:07 setuid sandbox: enabled 2020/06/16 11:00:07 namespace sandbox: enabled 2020/06/16 11:00:07 Android sandbox: /sys/fs/selinux/policy does not exist 2020/06/16 11:00:07 fault injection: enabled 2020/06/16 11:00:07 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/06/16 11:00:07 net packet injection: enabled 2020/06/16 11:00:07 net device setup: enabled 2020/06/16 11:00:07 concurrency sanitizer: enabled 2020/06/16 11:00:07 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/06/16 11:00:07 USB emulation: enabled 2020/06/16 11:00:07 suppressing KCSAN reports in functions: 'ep_poll' 'complete_signal' 'find_get_pages_range_tag' 'generic_fillattr' 'alloc_pid' 'copy_process' 'blk_mq_get_request' 'generic_file_read_iter' syzkaller login: [ 53.331785][ T8934] ================================================================== [ 53.340019][ T8934] BUG: KCSAN: data-race in __send_signal / futex_wait_queue_me [ 53.347554][ T8934] [ 53.349881][ T8934] write to 0xffff88812a8e3064 of 4 bytes by task 8929 on cpu 1: [ 53.357569][ T8934] futex_wait_queue_me+0x17d/0x290 [ 53.362660][ T8934] futex_wait+0x17e/0x3a0 [ 53.367003][ T8934] do_futex+0xe2/0x15b0 [ 53.371321][ T8934] __x64_sys_futex+0x2dc/0x410 [ 53.376066][ T8934] do_syscall_64+0xc7/0x3b0 [ 53.380821][ T8934] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 53.386682][ T8934] [ 53.388994][ T8934] read to 0xffff88812a8e3064 of 4 bytes by task 8934 on cpu 0: [ 53.397996][ T8934] __send_signal+0x468/0x8a0 [ 53.402570][ T8934] send_signal+0x211/0x2a0 [ 53.406972][ T8934] do_send_sig_info+0x59/0xc0 [ 53.411638][ T8934] do_send_specific+0xd8/0x100 [ 53.416389][ T8934] do_tkill+0xf8/0x130 [ 53.420468][ T8934] __x64_sys_tgkill+0x6d/0x90 [ 53.425129][ T8934] do_syscall_64+0xc7/0x3b0 [ 53.429622][ T8934] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 53.435497][ T8934] [ 53.437821][ T8934] Reported by Kernel Concurrency Sanitizer on: [ 53.443960][ T8934] CPU: 0 PID: 8934 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 53.452167][ T8934] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.462215][ T8934] ================================================================== [ 53.470458][ T8934] Kernel panic - not syncing: panic_on_warn set ... [ 53.477035][ T8934] CPU: 0 PID: 8934 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 53.485243][ T8934] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.495385][ T8934] Call Trace: [ 53.498659][ T8934] dump_stack+0x11d/0x187 [ 53.502969][ T8934] panic+0x210/0x640 [ 53.507045][ T8934] ? vprintk_func+0x89/0x13a [ 53.511699][ T8934] kcsan_report.cold+0xc/0x1a [ 53.516355][ T8934] kcsan_setup_watchpoint+0x3fb/0x440 [ 53.521816][ T8934] __send_signal+0x468/0x8a0 [ 53.526413][ T8934] send_signal+0x211/0x2a0 [ 53.530864][ T8934] do_send_sig_info+0x59/0xc0 [ 53.535533][ T8934] do_send_specific+0xd8/0x100 [ 53.540277][ T8934] do_tkill+0xf8/0x130 [ 53.544337][ T8934] __x64_sys_tgkill+0x6d/0x90 [ 53.549449][ T8934] do_syscall_64+0xc7/0x3b0 [ 53.553935][ T8934] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 53.559824][ T8934] RIP: 0033:0x468b26 [ 53.563701][ T8934] 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 cc cc cc cc cc cc cc cc cc 8b 7c 24 08 48 8b 74 24 10 48 8b 54 [ 53.583387][ T8934] RSP: 002b:000000c0000efed8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ea [ 53.591777][ T8934] RAX: ffffffffffffffda RBX: 000000c000000180 RCX: 0000000000468b26 [ 53.599725][ T8934] RDX: 0000000000000017 RSI: 00000000000022e1 RDI: 00000000000022e1 [ 53.607682][ T8934] RBP: 000000c0000efef8 R08: 00007ffcc2085080 R09: 0000000000000035 [ 53.615640][ T8934] R10: 000000c0000efec0 R11: 0000000000000246 R12: 0000000000000072 [ 53.623692][ T8934] R13: 0000000000e5e300 R14: 0000000000000000 R15: 0000000000000000 [ 53.633004][ T8934] Kernel Offset: disabled [ 53.637415][ T8934] Rebooting in 86400 seconds..