[ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ 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 '10.128.0.113' (ECDSA) to the list of known hosts. 2020/06/17 11:00:27 fuzzer started 2020/06/17 11:00:27 dialing manager at 10.128.0.105:40489 2020/06/17 11:00:28 syscalls: 3085 2020/06/17 11:00:28 code coverage: enabled 2020/06/17 11:00:28 comparison tracing: enabled 2020/06/17 11:00:28 extra coverage: enabled 2020/06/17 11:00:28 setuid sandbox: enabled 2020/06/17 11:00:28 namespace sandbox: enabled 2020/06/17 11:00:28 Android sandbox: /sys/fs/selinux/policy does not exist 2020/06/17 11:00:28 fault injection: enabled 2020/06/17 11:00:28 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/06/17 11:00:28 net packet injection: enabled 2020/06/17 11:00:28 net device setup: enabled 2020/06/17 11:00:28 concurrency sanitizer: enabled 2020/06/17 11:00:28 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/06/17 11:00:28 USB emulation: enabled 2020/06/17 11:00:28 suppressing KCSAN reports in functions: 'find_get_pages_range_tag' 'alloc_pid' 'copy_process' 'ep_poll' syzkaller login: [ 54.970835][ T8930] ================================================================== [ 54.979109][ T8930] BUG: KCSAN: data-race in complete_signal / futex_wait_queue_me [ 54.986845][ T8930] [ 54.989151][ T8930] write to 0xffff88812b2b5024 of 4 bytes by task 8932 on cpu 0: [ 54.996852][ T8930] futex_wait_queue_me+0x17d/0x290 [ 55.001942][ T8930] futex_wait+0x17e/0x3a0 [ 55.006246][ T8930] do_futex+0xe2/0x15b0 [ 55.010391][ T8930] __x64_sys_futex+0x2dc/0x410 [ 55.015132][ T8930] do_syscall_64+0xc7/0x3b0 [ 55.019625][ T8930] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 55.025669][ T8930] [ 55.027990][ T8930] read to 0xffff88812b2b5024 of 4 bytes by task 8930 on cpu 1: [ 55.035609][ T8930] complete_signal+0x85/0x5c0 [ 55.040263][ T8930] __send_signal+0x675/0x8a0 [ 55.044854][ T8930] send_signal+0x211/0x2a0 [ 55.049258][ T8930] do_send_sig_info+0x59/0xc0 [ 55.053925][ T8930] do_send_specific+0xd8/0x100 [ 55.058664][ T8930] do_tkill+0xf8/0x130 [ 55.062709][ T8930] __x64_sys_tgkill+0x6d/0x90 [ 55.067373][ T8930] do_syscall_64+0xc7/0x3b0 [ 55.071851][ T8930] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 55.077716][ T8930] [ 55.080023][ T8930] Reported by Kernel Concurrency Sanitizer on: [ 55.086168][ T8930] CPU: 1 PID: 8930 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 55.094386][ T8930] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.104431][ T8930] ================================================================== [ 55.112488][ T8930] Kernel panic - not syncing: panic_on_warn set ... [ 55.119591][ T8930] CPU: 1 PID: 8930 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 55.128523][ T8930] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.138563][ T8930] Call Trace: [ 55.141989][ T8930] dump_stack+0x11d/0x187 [ 55.146306][ T8930] panic+0x210/0x640 [ 55.150250][ T8930] ? sanitize_boot_params.constprop.0+0x60/0xad [ 55.156491][ T8930] ? vprintk_func+0x89/0x13a [ 55.161073][ T8930] kcsan_report.cold+0xc/0x1a [ 55.165733][ T8930] kcsan_setup_watchpoint+0x3fb/0x440 [ 55.171174][ T8930] complete_signal+0x85/0x5c0 [ 55.175830][ T8930] ? __sigqueue_alloc+0x190/0x2c0 [ 55.180863][ T8930] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 55.186729][ T8930] __send_signal+0x675/0x8a0 [ 55.191401][ T8930] send_signal+0x211/0x2a0 [ 55.195815][ T8930] do_send_sig_info+0x59/0xc0 [ 55.200526][ T8930] do_send_specific+0xd8/0x100 [ 55.205290][ T8930] do_tkill+0xf8/0x130 [ 55.209344][ T8930] __x64_sys_tgkill+0x6d/0x90 [ 55.214027][ T8930] do_syscall_64+0xc7/0x3b0 [ 55.218510][ T8930] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 55.224378][ T8930] RIP: 0033:0x468b26 [ 55.228258][ T8930] 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 [ 55.247836][ T8930] RSP: 002b:000000c000149eb0 EFLAGS: 00000246 ORIG_RAX: 00000000000000ea [ 55.256656][ T8930] RAX: ffffffffffffffda RBX: 000000c000000180 RCX: 0000000000468b26 [ 55.264619][ T8930] RDX: 0000000000000017 RSI: 00000000000022e4 RDI: 00000000000022de [ 55.272565][ T8930] RBP: 000000c000149ed0 R08: 0000000000000000 R09: 0000000000000036 [ 55.282275][ T8930] R10: 00007f58f4f23968 R11: 0000000000000246 R12: 000000c000861dd0 [ 55.290222][ T8930] R13: 0000000000e5e300 R14: 0000000000000000 R15: 0000000000000000 [ 55.299959][ T8930] Kernel Offset: disabled [ 55.304285][ T8930] Rebooting in 86400 seconds..