[ 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. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.231' (ECDSA) to the list of known hosts. 2020/06/06 01:29:03 fuzzer started 2020/06/06 01:29:03 dialing manager at 10.128.0.105:35423 2020/06/06 01:29:04 syscalls: 3055 2020/06/06 01:29:04 code coverage: enabled 2020/06/06 01:29:04 comparison tracing: enabled 2020/06/06 01:29:04 extra coverage: enabled 2020/06/06 01:29:04 setuid sandbox: enabled 2020/06/06 01:29:04 namespace sandbox: enabled 2020/06/06 01:29:04 Android sandbox: /sys/fs/selinux/policy does not exist 2020/06/06 01:29:04 fault injection: enabled 2020/06/06 01:29:04 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/06/06 01:29:04 net packet injection: enabled 2020/06/06 01:29:04 net device setup: enabled 2020/06/06 01:29:04 concurrency sanitizer: enabled 2020/06/06 01:29:04 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/06/06 01:29:04 USB emulation: enabled 2020/06/06 01:29:05 adding functions to KCSAN blacklist: 'wbt_done' 'find_get_pages_range_tag' 'copy_process' 'ep_poll' 'generic_write_end' 'alloc_pid' 'run_timer_softirq' syzkaller login: [ 55.808130][ T8903] ================================================================== [ 55.816429][ T8903] BUG: KCSAN: data-race in __send_signal / futex_wait_queue_me [ 55.824150][ T8903] [ 55.826458][ T8903] write to 0xffff88812694e0a4 of 4 bytes by task 8901 on cpu 1: [ 55.834093][ T8903] futex_wait_queue_me+0x17d/0x290 [ 55.839459][ T8903] futex_wait+0x17e/0x3a0 [ 55.843785][ T8903] do_futex+0xe2/0x15b0 [ 55.847930][ T8903] __x64_sys_futex+0x2dc/0x410 [ 55.853811][ T8903] do_syscall_64+0xc7/0x3b0 [ 55.858311][ T8903] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 55.865208][ T8903] [ 55.867547][ T8903] read to 0xffff88812694e0a4 of 4 bytes by task 8903 on cpu 0: [ 55.877215][ T8903] __send_signal+0x468/0x8a0 [ 55.883309][ T8903] send_signal+0x211/0x2a0 [ 55.887712][ T8903] do_send_sig_info+0x59/0xc0 [ 55.892974][ T8903] do_send_specific+0xd8/0x100 [ 55.897717][ T8903] do_tkill+0xf8/0x130 [ 55.902145][ T8903] __x64_sys_tgkill+0x6d/0x90 [ 55.906801][ T8903] do_syscall_64+0xc7/0x3b0 [ 55.912504][ T8903] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 55.919129][ T8903] [ 55.921604][ T8903] Reported by Kernel Concurrency Sanitizer on: [ 55.928674][ T8903] CPU: 0 PID: 8903 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 55.937470][ T8903] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.948104][ T8903] ================================================================== [ 55.956170][ T8903] Kernel panic - not syncing: panic_on_warn set ... [ 55.963347][ T8903] CPU: 0 PID: 8903 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 55.971645][ T8903] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.982364][ T8903] Call Trace: [ 55.986484][ T8903] dump_stack+0x11d/0x187 [ 55.990983][ T8903] panic+0x210/0x640 [ 55.995048][ T8903] ? vprintk_func+0x89/0x13a [ 55.999825][ T8903] kcsan_report.cold+0xc/0x1a [ 56.005183][ T8903] kcsan_setup_watchpoint+0x3fb/0x440 [ 56.011423][ T8903] __send_signal+0x468/0x8a0 [ 56.016005][ T8903] send_signal+0x211/0x2a0 [ 56.020417][ T8903] do_send_sig_info+0x59/0xc0 [ 56.025088][ T8903] do_send_specific+0xd8/0x100 [ 56.029953][ T8903] do_tkill+0xf8/0x130 [ 56.034005][ T8903] __x64_sys_tgkill+0x6d/0x90 [ 56.038666][ T8903] do_syscall_64+0xc7/0x3b0 [ 56.043157][ T8903] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 56.049028][ T8903] RIP: 0033:0x468b26 [ 56.052905][ T8903] 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 [ 56.072676][ T8903] RSP: 002b:000000c0000cbeb0 EFLAGS: 00000246 ORIG_RAX: 00000000000000ea [ 56.081066][ T8903] RAX: ffffffffffffffda RBX: 000000c000000180 RCX: 0000000000468b26 [ 56.089027][ T8903] RDX: 0000000000000017 RSI: 00000000000022c5 RDI: 00000000000022c3 [ 56.097151][ T8903] RBP: 000000c0000cbed0 R08: 0000000000000000 R09: 0000000000000037 [ 56.105104][ T8903] R10: 00007f6f12e6a968 R11: 0000000000000246 R12: 0000000000000012 [ 56.113056][ T8903] R13: 0000000000e52de0 R14: 0000000000000000 R15: 0000000000000000 [ 56.122723][ T8903] Kernel Offset: disabled [ 56.127133][ T8903] Rebooting in 86400 seconds..