[ 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 '10.128.1.61' (ECDSA) to the list of known hosts. 2020/06/08 10:55:42 fuzzer started 2020/06/08 10:55:42 dialing manager at 10.128.0.105:38613 2020/06/08 10:55:43 syscalls: 3055 2020/06/08 10:55:43 code coverage: enabled 2020/06/08 10:55:43 comparison tracing: enabled 2020/06/08 10:55:43 extra coverage: enabled 2020/06/08 10:55:43 setuid sandbox: enabled 2020/06/08 10:55:43 namespace sandbox: enabled 2020/06/08 10:55:43 Android sandbox: /sys/fs/selinux/policy does not exist 2020/06/08 10:55:43 fault injection: enabled 2020/06/08 10:55:43 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/06/08 10:55:43 net packet injection: enabled 2020/06/08 10:55:43 net device setup: enabled 2020/06/08 10:55:43 concurrency sanitizer: enabled 2020/06/08 10:55:43 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/06/08 10:55:43 USB emulation: enabled 2020/06/08 10:55:45 adding functions to KCSAN blacklist: 'ep_poll' '__ext4_new_inode' 'ktime_get_real_seconds' 'run_timer_softirq' 'copy_process' 'find_get_pages_range_tag' 'do_nanosleep' 'tick_sched_do_timer' 'do_signal_stop' 'blk_mq_dispatch_rq_list' 'complete_signal' 'dd_has_work' '_find_next_bit' 'mod_timer' syzkaller login: [ 52.395402][ T8943] KCSAN: could not find function: '_find_next_bit' [ 57.673734][ T8931] ================================================================== [ 57.681971][ T8931] BUG: KCSAN: data-race in __send_signal / futex_wait_queue_me [ 57.689482][ T8931] [ 57.691791][ T8931] write to 0xffff8881268c5024 of 4 bytes by task 8933 on cpu 0: [ 57.699397][ T8931] futex_wait_queue_me+0x17d/0x290 [ 57.704568][ T8931] futex_wait+0x17e/0x3a0 [ 57.708905][ T8931] do_futex+0xe2/0x15b0 [ 57.713035][ T8931] __x64_sys_futex+0x2dc/0x410 [ 57.717806][ T8931] do_syscall_64+0xc7/0x3b0 [ 57.722294][ T8931] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 57.728155][ T8931] [ 57.730461][ T8931] read to 0xffff8881268c5024 of 4 bytes by task 8931 on cpu 1: [ 57.738345][ T8931] __send_signal+0x468/0x8a0 [ 57.742911][ T8931] send_signal+0x211/0x2a0 [ 57.747322][ T8931] do_send_sig_info+0x59/0xc0 [ 57.751974][ T8931] do_send_specific+0xd8/0x100 [ 57.756711][ T8931] do_tkill+0xf8/0x130 [ 57.760758][ T8931] __x64_sys_tgkill+0x6d/0x90 [ 57.765413][ T8931] do_syscall_64+0xc7/0x3b0 [ 57.769896][ T8931] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 57.775753][ T8931] [ 57.778053][ T8931] Reported by Kernel Concurrency Sanitizer on: [ 57.784199][ T8931] CPU: 1 PID: 8931 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 57.793277][ T8931] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.803325][ T8931] ================================================================== [ 57.811387][ T8931] Kernel panic - not syncing: panic_on_warn set ... [ 57.817970][ T8931] CPU: 1 PID: 8931 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 57.826177][ T8931] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.836208][ T8931] Call Trace: [ 57.839483][ T8931] dump_stack+0x11d/0x187 [ 57.843811][ T8931] panic+0x210/0x640 [ 57.847687][ T8931] ? vprintk_func+0x89/0x13a [ 57.852258][ T8931] kcsan_report.cold+0xc/0x1a [ 57.856938][ T8931] kcsan_setup_watchpoint+0x3fb/0x440 [ 57.862292][ T8931] __send_signal+0x468/0x8a0 [ 57.866876][ T8931] send_signal+0x211/0x2a0 [ 57.872364][ T8931] do_send_sig_info+0x59/0xc0 [ 57.877042][ T8931] do_send_specific+0xd8/0x100 [ 57.881800][ T8931] do_tkill+0xf8/0x130 [ 57.885869][ T8931] __x64_sys_tgkill+0x6d/0x90 [ 57.890622][ T8931] do_syscall_64+0xc7/0x3b0 [ 57.895112][ T8931] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 57.900987][ T8931] RIP: 0033:0x468b26 [ 57.904868][ T8931] 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 [ 57.924465][ T8931] RSP: 002b:000000c00004fed8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ea [ 57.932885][ T8931] RAX: ffffffffffffffda RBX: 000000c000000180 RCX: 0000000000468b26 [ 57.940846][ T8931] RDX: 0000000000000017 RSI: 00000000000022e5 RDI: 00000000000022e1 [ 57.948803][ T8931] RBP: 000000c00004fef8 R08: 00007ffcf0711080 R09: 0000000000000039 [ 57.956802][ T8931] R10: 000000c00004fec0 R11: 0000000000000246 R12: 0000000000000000 [ 57.964864][ T8931] R13: 0000000000000000 R14: 0000000000ab47f9 R15: 0000000000000000 [ 57.975225][ T8931] Kernel Offset: disabled [ 57.979548][ T8931] Rebooting in 86400 seconds..