Warning: Permanently added '10.128.0.129' (ECDSA) to the list of known hosts.
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syzkaller login: [   66.524699][ T7801] ------------[ cut here ]------------
[   66.530441][ T7801] percpu_ref_kill_and_confirm called more than once on io_ring_ctx_ref_free!
[   66.531018][ T7801] WARNING: CPU: 0 PID: 7801 at lib/percpu-refcount.c:335 percpu_ref_kill_and_confirm+0x341/0x3b0
[   66.550263][ T7801] Kernel panic - not syncing: panic_on_warn set ...
[   66.556854][ T7801] CPU: 0 PID: 7801 Comm: syz-executor437 Not tainted 5.1.0-rc5+ #77
[   66.564828][ T7801] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   66.575032][ T7801] Call Trace:
[   66.578350][ T7801]  dump_stack+0x172/0x1f0
[   66.582684][ T7801]  ? percpu_ref_kill_and_confirm+0x340/0x3b0
[   66.588683][ T7801]  panic+0x2cb/0x65c
[   66.592609][ T7801]  ? __warn_printk+0xf3/0xf3
[   66.597276][ T7801]  ? percpu_ref_kill_and_confirm+0x341/0x3b0
[   66.603382][ T7801]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   66.609626][ T7801]  ? __warn.cold+0x5/0x45
[   66.613957][ T7801]  ? __warn+0xe8/0x1d0
[   66.618027][ T7801]  ? percpu_ref_kill_and_confirm+0x341/0x3b0
[   66.624017][ T7801]  __warn.cold+0x20/0x45
[   66.628267][ T7801]  ? vprintk_emit+0x1ce/0x6d0
[   66.632957][ T7801]  ? percpu_ref_kill_and_confirm+0x341/0x3b0
[   66.638944][ T7801]  report_bug+0x263/0x2b0
[   66.643294][ T7801]  do_error_trap+0x11b/0x200
[   66.647883][ T7801]  do_invalid_op+0x37/0x50
[   66.652297][ T7801]  ? percpu_ref_kill_and_confirm+0x341/0x3b0
[   66.658564][ T7801]  invalid_op+0x14/0x20
[   66.662912][ T7801] RIP: 0010:percpu_ref_kill_and_confirm+0x341/0x3b0
[   66.669497][ T7801] Code: 42 e0 2a 06 01 48 89 fa 48 c1 ea 03 80 3c 02 00 75 76 49 8b 54 24 10 48 c7 c6 a0 71 a1 87 48 c7 c7 40 71 a1 87 e8 ad 92 13 fe <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02
[   66.689136][ T7801] RSP: 0018:ffff88808d8c7ce0 EFLAGS: 00010086
[   66.695204][ T7801] RAX: 0000000000000000 RBX: 0000607f5142f833 RCX: 0000000000000000
[   66.703365][ T7801] RDX: 0000000000000000 RSI: ffffffff815afcf6 RDI: ffffed1011b18f8e
[   66.711333][ T7801] RBP: ffff88808d8c7d10 R08: ffff88808caa4380 R09: fffffbfff1133639
[   66.719410][ T7801] R10: fffffbfff1133638 R11: ffffffff8899b1c3 R12: ffff88808f556a00
[   66.727610][ T7801] R13: ffff88808f556a08 R14: 0000000000000286 R15: 0000000000000000
[   66.735640][ T7801]  ? vprintk_func+0x86/0x189
[   66.740330][ T7801]  __io_uring_register+0xa7/0x1fe0
[   66.745443][ T7801]  ? __mutex_lock+0x3cd/0x1310
[   66.750209][ T7801]  ? __ia32_sys_io_uring_register+0x182/0x1f0
[   66.756374][ T7801]  ? mutex_trylock+0x1e0/0x1e0
[   66.761137][ T7801]  ? io_sq_wq_submit_work+0x10f0/0x10f0
[   66.766685][ T7801]  ? calculate_sigpending+0x87/0xa0
[   66.771994][ T7801]  __ia32_sys_io_uring_register+0x193/0x1f0
[   66.777946][ T7801]  do_fast_syscall_32+0x281/0xc98
[   66.783235][ T7801]  entry_SYSENTER_compat+0x70/0x7f
[   66.788777][ T7801] RIP: 0023:0xf7f13869
[   66.793014][ T7801] Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
[   66.813164][ T7801] RSP: 002b:00000000f7eee1ec EFLAGS: 00000296 ORIG_RAX: 00000000000001ab
[   66.821751][ T7801] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000000001
[   66.829889][ T7801] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[   66.837861][ T7801] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[   66.846098][ T7801] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[   66.854218][ T7801] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[   66.863227][ T7801] Kernel Offset: disabled
[   66.867817][ T7801] Rebooting in 86400 seconds..