Warning: Permanently added '10.128.10.21' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 815.037187][ T28] audit: type=1400 audit(1601324486.377:8): avc: denied { execmem } for pid=6899 comm="syz-executor047" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 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 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 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 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 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 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 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 [ 947.405921][T11616] ------------[ cut here ]------------ [ 947.443850][T11616] refcount_t: underflow; use-after-free. [ 947.491310][T11616] WARNING: CPU: 1 PID: 11616 at lib/refcount.c:28 refcount_warn_saturate+0x1d1/0x1e0 [ 947.567045][T11616] Kernel panic - not syncing: panic_on_warn set ... [ 947.573678][T11616] CPU: 1 PID: 11616 Comm: io_wqe_worker-1 Not tainted 5.9.0-rc7-syzkaller #0 [ 947.582433][T11616] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 947.592489][T11616] Call Trace: [ 947.595786][T11616] dump_stack+0x198/0x1fd [ 947.600130][T11616] panic+0x382/0x7fb [ 947.604025][T11616] ? __warn_printk+0xf3/0xf3 [ 947.608626][T11616] ? __warn.cold+0x5/0x4b [ 947.612955][T11616] ? __warn+0xd6/0x1f2 [ 947.617026][T11616] ? refcount_warn_saturate+0x1d1/0x1e0 [ 947.622571][T11616] __warn.cold+0x20/0x4b [ 947.626810][T11616] ? wake_up_klogd.part.0+0x8e/0xd0 [ 947.632009][T11616] ? refcount_warn_saturate+0x1d1/0x1e0 [ 947.637589][T11616] report_bug+0x1bd/0x210 [ 947.641927][T11616] handle_bug+0x38/0x90 [ 947.646085][T11616] exc_invalid_op+0x14/0x40 [ 947.650587][T11616] asm_exc_invalid_op+0x12/0x20 [ 947.655441][T11616] RIP: 0010:refcount_warn_saturate+0x1d1/0x1e0 [ 947.661597][T11616] Code: e9 db fe ff ff 48 89 df e8 9c 26 f7 fd e9 8a fe ff ff e8 02 4f b6 fd 48 c7 c7 a0 73 d8 88 c6 05 ac 8e 94 07 01 e8 71 8c 86 fd <0f> 0b e9 af fe ff ff 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 55 [ 947.681204][T11616] RSP: 0018:ffffc90009fafe08 EFLAGS: 00010286 [ 947.687268][T11616] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 947.695240][T11616] RDX: ffff8880a88a4500 RSI: ffffffff815f59d5 RDI: fffff520013f5fb3 [ 947.703211][T11616] RBP: 0000000000000003 R08: 0000000000000001 R09: ffff8880ae5318e7 executing program [ 947.711179][T11616] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809a0f88b8 [ 947.719151][T11616] R13: ffff8880a1ef2930 R14: ffff8880a1ef2900 R15: ffff8880a7930400 [ 947.727145][T11616] ? vprintk_func+0x95/0x1d4 [ 947.731746][T11616] ? refcount_warn_saturate+0x1d1/0x1e0 [ 947.737293][T11616] io_wqe_worker+0xcdb/0x10e0 [ 947.741983][T11616] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 947.747967][T11616] ? io_worker_handle_work+0x13f0/0x13f0 [ 947.753608][T11616] ? lockdep_hardirqs_on+0x53/0x100 [ 947.758817][T11616] ? __kthread_parkme+0x13f/0x1e0 [ 947.763842][T11616] ? io_worker_handle_work+0x13f0/0x13f0 [ 947.769480][T11616] kthread+0x3b5/0x4a0 [ 947.773561][T11616] ? __kthread_bind_mask+0xc0/0xc0 [ 947.778685][T11616] ret_from_fork+0x1f/0x30 [ 947.784833][T11616] Kernel Offset: disabled [ 947.789245][T11616] Rebooting in 86400 seconds..