[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.31' (ECDSA) to the list of known hosts. 2020/06/09 12:40:00 fuzzer started 2020/06/09 12:40:00 dialing manager at 10.128.0.105:35435 2020/06/09 12:40:00 syscalls: 3055 2020/06/09 12:40:00 code coverage: enabled 2020/06/09 12:40:00 comparison tracing: enabled 2020/06/09 12:40:00 extra coverage: enabled 2020/06/09 12:40:00 setuid sandbox: enabled 2020/06/09 12:40:00 namespace sandbox: enabled 2020/06/09 12:40:00 Android sandbox: /sys/fs/selinux/policy does not exist 2020/06/09 12:40:00 fault injection: enabled 2020/06/09 12:40:00 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/06/09 12:40:00 net packet injection: enabled 2020/06/09 12:40:00 net device setup: enabled 2020/06/09 12:40:00 concurrency sanitizer: enabled 2020/06/09 12:40:00 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/06/09 12:40:00 USB emulation: enabled syzkaller login: [ 52.177618][ T8923] KCSAN: could not find function: '_find_next_bit' 2020/06/09 12:40:02 adding functions to KCSAN blacklist: 'generic_write_end' 'add_timer' 'do_syslog' '__ext4_new_inode' '_find_next_bit' 'ep_poll' 'ktime_get_ts64' 'find_get_pages_range_tag' 'page_counter_charge' 'xas_clear_mark' 'blk_mq_dispatch_rq_list' 'copy_process' 'tick_sched_do_timer' [ 56.869985][ T8910] ================================================================== [ 56.878082][ T8910] BUG: KCSAN: data-race in complete_signal / futex_wait_queue_me [ 56.885775][ T8910] [ 56.888091][ T8910] write to 0xffff8881214320a4 of 4 bytes by task 8912 on cpu 1: [ 56.895711][ T8910] futex_wait_queue_me+0x17d/0x290 [ 56.900797][ T8910] futex_wait+0x17e/0x3a0 [ 56.905117][ T8910] do_futex+0xe2/0x15b0 [ 56.909254][ T8910] __x64_sys_futex+0x2dc/0x410 [ 56.914000][ T8910] do_syscall_64+0xc7/0x3b0 [ 56.918492][ T8910] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 56.924418][ T8910] [ 56.926758][ T8910] read to 0xffff8881214320a4 of 4 bytes by task 8910 on cpu 0: [ 56.934306][ T8910] complete_signal+0x85/0x5c0 [ 56.938958][ T8910] __send_signal+0x675/0x8a0 [ 56.943532][ T8910] send_signal+0x211/0x2a0 [ 56.947924][ T8910] do_send_sig_info+0x59/0xc0 [ 56.952572][ T8910] do_send_specific+0xd8/0x100 [ 56.957320][ T8910] do_tkill+0xf8/0x130 [ 56.961375][ T8910] __x64_sys_tgkill+0x6d/0x90 [ 56.966029][ T8910] do_syscall_64+0xc7/0x3b0 [ 56.970508][ T8910] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 56.976377][ T8910] [ 56.978677][ T8910] Reported by Kernel Concurrency Sanitizer on: [ 56.984815][ T8910] CPU: 0 PID: 8910 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 56.993021][ T8910] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.003047][ T8910] ================================================================== [ 57.011078][ T8910] Kernel panic - not syncing: panic_on_warn set ... [ 57.017641][ T8910] CPU: 0 PID: 8910 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 57.025848][ T8910] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.035885][ T8910] Call Trace: [ 57.039152][ T8910] dump_stack+0x11d/0x187 [ 57.043457][ T8910] panic+0x210/0x640 [ 57.047334][ T8910] ? vprintk_func+0x89/0x13a [ 57.051900][ T8910] kcsan_report.cold+0xc/0x1a [ 57.056557][ T8910] kcsan_setup_watchpoint+0x3fb/0x440 [ 57.061922][ T8910] complete_signal+0x85/0x5c0 [ 57.066574][ T8910] ? __sigqueue_alloc+0x190/0x2c0 [ 57.071576][ T8910] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 57.077452][ T8910] __send_signal+0x675/0x8a0 [ 57.082017][ T8910] send_signal+0x211/0x2a0 [ 57.086427][ T8910] do_send_sig_info+0x59/0xc0 [ 57.091246][ T8910] do_send_specific+0xd8/0x100 [ 57.095996][ T8910] do_tkill+0xf8/0x130 [ 57.100055][ T8910] __x64_sys_tgkill+0x6d/0x90 [ 57.104807][ T8910] do_syscall_64+0xc7/0x3b0 [ 57.109289][ T8910] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 57.115170][ T8910] RIP: 0033:0x468b26 [ 57.119044][ T8910] 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 [ 57.138632][ T8910] RSP: 002b:000000c00004fed8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ea [ 57.147024][ T8910] RAX: ffffffffffffffda RBX: 000000c000000180 RCX: 0000000000468b26 [ 57.154983][ T8910] RDX: 0000000000000017 RSI: 00000000000022d0 RDI: 00000000000022cc [ 57.162930][ T8910] RBP: 000000c00004fef8 R08: 00007ffda4f0f080 R09: 0000000000000038 [ 57.170876][ T8910] R10: 000000c00004fec0 R11: 0000000000000246 R12: 00000000000000fa [ 57.178820][ T8910] R13: 0000000000e52e00 R14: 0000000000000000 R15: 0000000000000000 [ 57.191691][ T8910] Kernel Offset: disabled [ 57.196005][ T8910] Rebooting in 86400 seconds..