Warning: Permanently added '10.128.0.37' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 330.883179][T10206] ------------[ cut here ]------------ [ 330.888771][T10206] WARNING: CPU: 1 PID: 10206 at lib/percpu-refcount.c:111 percpu_ref_exit+0xab/0xd0 [ 330.898190][T10206] Kernel panic - not syncing: panic_on_warn set ... [ 330.905444][T10206] CPU: 1 PID: 10206 Comm: syz-executor347 Not tainted 5.5.0-rc2-next-20191220-syzkaller #0 [ 330.915398][T10206] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 330.925435][T10206] Call Trace: [ 330.928778][T10206] dump_stack+0x197/0x210 [ 330.933098][T10206] ? percpu_ref_exit+0x50/0xd0 [ 330.937934][T10206] panic+0x2e3/0x75c [ 330.941826][T10206] ? add_taint.cold+0x16/0x16 [ 330.946536][T10206] ? printk+0xba/0xed [ 330.950506][T10206] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 330.957199][T10206] ? __warn.cold+0x14/0x3e [ 330.961603][T10206] ? __warn+0xd9/0x1cf [ 330.965659][T10206] ? percpu_ref_exit+0xab/0xd0 [ 330.970403][T10206] __warn.cold+0x2f/0x3e [ 330.974625][T10206] ? report_bug.cold+0x63/0xb2 [ 330.979399][T10206] ? percpu_ref_exit+0xab/0xd0 [ 330.984157][T10206] report_bug+0x289/0x300 [ 330.988516][T10206] do_error_trap+0x11b/0x200 [ 330.993107][T10206] do_invalid_op+0x37/0x50 [ 330.997513][T10206] ? percpu_ref_exit+0xab/0xd0 [ 331.002305][T10206] invalid_op+0x23/0x30 [ 331.006458][T10206] RIP: 0010:percpu_ref_exit+0xab/0xd0 [ 331.012023][T10206] Code: 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 75 1d 48 c7 43 08 03 00 00 00 e8 41 c4 d7 fd 5b 41 5c 41 5d 5d c3 e8 35 c4 d7 fd <0f> 0b eb bf 4c 89 ef e8 69 af 15 fe eb d9 e8 c2 ae 15 fe eb a7 4c [ 331.032045][T10206] RSP: 0018:ffffc900030b7bc0 EFLAGS: 00010293 [ 331.038094][T10206] RAX: ffff8880a4a66380 RBX: ffff888095046010 RCX: ffffffff839d90f2 [ 331.046091][T10206] RDX: 0000000000000000 RSI: ffffffff839d915b RDI: ffff888095046028 [ 331.054066][T10206] RBP: ffffc900030b7bd8 R08: ffff8880a4a66380 R09: 0000000000000000 [ 331.062033][T10206] R10: 0000000000000000 R11: 0000000000000000 R12: 0000607f51435308 [ 331.069995][T10206] R13: ffff888095046018 R14: ffff88809927b800 R15: ffff88809927ba28 [ 331.077973][T10206] ? percpu_ref_exit+0x42/0xd0 [ 331.082723][T10206] ? percpu_ref_exit+0xab/0xd0 [ 331.087529][T10206] io_sqe_files_unregister+0x7d/0x2f0 [ 331.093019][T10206] io_ring_ctx_wait_and_kill+0x430/0x9a0 [ 331.098712][T10206] ? __sanitizer_cov_trace_const_cmp2+0x10/0x20 [ 331.104941][T10206] io_uring_release+0x42/0x50 [ 331.109633][T10206] __fput+0x2ff/0x890 [ 331.113605][T10206] ? io_ring_ctx_wait_and_kill+0x9a0/0x9a0 [ 331.119395][T10206] ____fput+0x16/0x20 [ 331.123398][T10206] task_work_run+0x145/0x1c0 [ 331.127975][T10206] do_exit+0x909/0x2f20 [ 331.132119][T10206] ? mm_update_next_owner+0x7c0/0x7c0 [ 331.137558][T10206] ? down_read_non_owner+0x490/0x490 [ 331.142839][T10206] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 331.149102][T10206] ? handle_mm_fault+0x4ab/0xa50 [ 331.154067][T10206] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 331.159520][T10206] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 331.165065][T10206] do_group_exit+0x135/0x360 [ 331.169670][T10206] __x64_sys_exit_group+0x44/0x50 [ 331.174696][T10206] do_syscall_64+0xfa/0x790 [ 331.179194][T10206] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 331.185062][T10206] RIP: 0033:0x43fee8 [ 331.188934][T10206] Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0 0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00 [ 331.209570][T10206] RSP: 002b:00007ffc927712d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 331.217968][T10206] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043fee8 [ 331.225927][T10206] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 331.233878][T10206] RBP: 00000000004bf770 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 331.241826][T10206] R10: 000000000000035b R11: 0000000000000246 R12: 0000000000000001 [ 331.249786][T10206] R13: 00000000006d1180 R14: 0000000000000000 R15: 0000000000000000 [ 331.259205][T10206] Kernel Offset: disabled [ 331.263608][T10206] Rebooting in 86400 seconds..