Warning: Permanently added '10.128.1.32' (ECDSA) to the list of known hosts.
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syzkaller login: [ 1122.757413] ------------[ cut here ]------------
[ 1122.762373] WARNING: CPU: 1 PID: 8020 at kernel/signal.c:358 task_participate_group_stop+0x237/0x2b0
[ 1122.771642] Kernel panic - not syncing: panic_on_warn set ...
[ 1122.771642] 
[ 1122.779007] CPU: 1 PID: 8020 Comm: 4 Not tainted 4.14.212-syzkaller #0
[ 1122.785673] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 1122.795116] Call Trace:
[ 1122.797706]  dump_stack+0x1b2/0x283
[ 1122.801340]  panic+0x1f9/0x42d
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[ 1122.804530]  ? add_taint.cold+0x16/0x16
[ 1122.808506]  ? task_participate_group_stop+0x237/0x2b0
[ 1122.813786]  ? task_participate_group_stop+0x237/0x2b0
[ 1122.819066]  __warn.cold+0x20/0x4b
[ 1122.822614]  ? ist_end_non_atomic+0x10/0x10
[ 1122.826947]  ? task_participate_group_stop+0x237/0x2b0
[ 1122.832225]  report_bug+0x208/0x249
[ 1122.835859]  do_error_trap+0x195/0x2d0
[ 1122.839750]  ? math_error+0x2d0/0x2d0
[ 1122.843557]  ? unwind_get_return_address+0x51/0x90
[ 1122.848497]  ? entry_SYSCALL_64_after_hwframe+0x46/0xbb
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[ 1122.853871]  ? __save_stack_trace+0xa0/0x160
[ 1122.858287]  ? kernel_text_address+0xbd/0xf0
[ 1122.862697]  ? check_preemption_disabled+0x35/0x240
[ 1122.867717]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[ 1122.872568]  invalid_op+0x1b/0x40
[ 1122.876022] RIP: 0010:task_participate_group_stop+0x237/0x2b0
[ 1122.881902] RSP: 0018:ffff88808bddfbc0 EFLAGS: 00010097
[ 1122.887379] RAX: ffff8880b18723c0 RBX: 0000000000000000 RCX: 0000000000007cec
[ 1122.894655] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8880b1872ac0
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[ 1122.901924] RBP: ffff8880a709a0d8 R08: ffffffff8b9c7220 R09: 00000000000c008d
[ 1122.909453] R10: ffff8880b1872c48 R11: ffff8880b18723c0 R12: ffff8880a709a040
[ 1122.916726] R13: ffff8880b1872850 R14: 0000000000040000 R15: 0000000000000013
[ 1122.924021]  do_signal_stop+0x1ab/0x770
[ 1122.928003]  get_signal+0xd2c/0x1ca0
[ 1122.931767]  ? debug_check_no_obj_freed+0x2c0/0x674
[ 1122.936790]  ? _raw_spin_unlock_irqrestore+0x66/0xe0
[ 1122.941909]  do_signal+0x7c/0x1550
[ 1122.945460]  ? put_files_struct+0x2b8/0x340
[ 1122.949783]  ? rcu_read_lock_sched_held+0x16c/0x1d0
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[ 1122.954802]  ? kmem_cache_free+0x23a/0x2b0
[ 1122.959038]  ? setup_sigcontext+0x820/0x820
[ 1122.963364]  ? do_execveat_common+0x25a/0x1f30
[ 1122.968004]  ? copy_strings_kernel+0x110/0x110
[ 1122.972591]  ? strncpy_from_user+0x210/0x2c0
[ 1122.977027]  ? exit_to_usermode_loop+0x41/0x200
[ 1122.981697]  exit_to_usermode_loop+0x160/0x200
[ 1122.986278]  ? SyS_execve+0x50/0x50
[ 1122.989907]  do_syscall_64+0x4a3/0x640
[ 1122.993801]  entry_SYSCALL_64_after_hwframe+0x46/0xbb
[ 1122.998988] RIP: 0023:0xb7000000
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[ 1123.002387] RSP: 002b:00000000ffa92930 EFLAGS: 00000200 ORIG_RAX: 000000000000000b
[ 1123.010104] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 1123.017374] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 1123.024644] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[ 1123.032035] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[ 1123.039303] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 1123.047589] Kernel Offset: disabled
[ 1123.051282] Rebooting in 86400 seconds..