INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added 'ci-upstream-next-kasan-gce-1,10.128.0.24' (ECDSA) to the list of known hosts. 2017/09/10 03:46:17 parsed 1 programs 2017/09/10 03:46:17 executed programs: 0 syzkaller login: [ 32.347307] ------------[ cut here ]------------ [ 32.348062] WARNING: CPU: 1 PID: 1 at kernel/signal.c:340 task_participate_group_stop+0x1ce/0x230 [ 32.349288] Kernel panic - not syncing: panic_on_warn set ... [ 32.349288] [ 32.350262] CPU: 1 PID: 1 Comm: init Not tainted 4.13.0-next-20170908+ #18 [ 32.351184] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.352406] Call Trace: [ 32.352767] dump_stack+0x194/0x257 [ 32.353265] ? arch_local_irq_restore+0x53/0x53 [ 32.353903] panic+0x1e4/0x417 [ 32.354340] ? __warn+0x1d9/0x1d9 [ 32.354808] ? show_regs_print_info+0x65/0x65 [ 32.355428] ? task_participate_group_stop+0x1ce/0x230 [ 32.356129] __warn+0x1c4/0x1d9 [ 32.356578] ? task_participate_group_stop+0x1ce/0x230 [ 32.357287] report_bug+0x211/0x2d0 [ 32.357786] fixup_bug+0x40/0x90 [ 32.358247] do_trap+0x260/0x390 [ 32.358704] ? retint_kernel+0x10/0x10 [ 32.359236] do_error_trap+0x120/0x390 [ 32.359767] ? do_trap+0x390/0x390 [ 32.360252] ? task_participate_group_stop+0x1ce/0x230 [ 32.360964] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.361618] do_invalid_op+0x1b/0x20 [ 32.362122] invalid_op+0x18/0x20 [ 32.362592] RIP: 0010:task_participate_group_stop+0x1ce/0x230 [ 32.363368] RSP: 0018:ffff8801d9ee77f0 EFLAGS: 00010097 [ 32.364088] RAX: ffff8801d9ed8040 RBX: ffff8801d9ed8040 RCX: ffff8801d9edb2c0 [ 32.365047] RDX: 0000000000000000 RSI: 0000000000060013 RDI: ffff8801d9ed84d0 [ 32.366001] RBP: ffff8801d9ee7808 R08: ffff8801d9ee7180 R09: ffff8801d9ee7178 [ 32.366956] R10: ffff8801d9ee70f0 R11: 1ffff1003b3db29b R12: ffff8801d9ee9740 [ 32.371110] R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8801d9ed85c8 [ 32.378374] ? do_signal_stop+0x486/0x900 [ 32.382495] do_signal_stop+0x217/0x900 [ 32.386447] ? ptrace_do_notify+0x310/0x310 [ 32.390741] ? __lock_is_held+0xbc/0x140 [ 32.394784] get_signal+0x61c/0x17e0 [ 32.398495] ? ptrace_notify+0x130/0x130 [ 32.402531] ? lock_downgrade+0x990/0x990 [ 32.406651] ? find_held_lock+0x39/0x1d0 [ 32.410691] ? lock_downgrade+0x990/0x990 [ 32.414825] do_signal+0x94/0x1ee0 [ 32.418338] ? __might_fault+0xe0/0x1d0 [ 32.422292] ? setup_sigcontext+0x7d0/0x7d0 [ 32.426594] ? __might_sleep+0x95/0x190 [ 32.430549] ? kasan_check_read+0x11/0x20 [ 32.434670] ? _copy_to_user+0xa2/0xc0 [ 32.438533] ? poll_select_copy_remaining+0x38f/0x620 [ 32.443697] ? exit_to_usermode_loop+0x98/0x300 [ 32.448344] exit_to_usermode_loop+0x224/0x300 [ 32.452895] ? poll_select_set_timeout+0x12f/0x210 [ 32.457797] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 32.463307] ? kasan_check_write+0x14/0x20 [ 32.467521] syscall_return_slowpath+0x42f/0x500 [ 32.472253] ? prepare_exit_to_usermode+0x2c0/0x2c0 [ 32.477258] ? entry_SYSCALL_64_fastpath+0x91/0xbe [ 32.482161] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 32.487152] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 32.491884] entry_SYSCALL_64_fastpath+0xbc/0xbe [ 32.496611] RIP: 0033:0x7f35c9ff7dd3 [ 32.500292] RSP: 002b:00007ffebc4b0718 EFLAGS: 00000246 ORIG_RAX: 0000000000000017 [ 32.507991] RAX: fffffffffffffdfe RBX: 00007ffebc4b08c0 RCX: 00007f35c9ff7dd3 [ 32.515235] RDX: 0000000000000000 RSI: 00007ffebc4b0a70 RDI: 000000000000000b [ 32.522477] RBP: 00007ffebc4b0a70 R08: 00007ffebc4b0af0 R09: 0000000000000001 [ 32.529716] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 32.536957] R13: 00007ffebc4b0e50 R14: 0000000000000000 R15: 0000000000000000 [ 32.544366] Dumping ftrace buffer: [ 32.547925] (ftrace buffer empty) [ 32.551607] Kernel Offset: disabled [ 32.555214] Rebooting in 86400 seconds..