Warning: Permanently added '10.128.0.62' (ECDSA) to the list of known hosts. executing program [ 56.257396][ T26] audit: type=1400 audit(1555815360.374:36): avc: denied { map } for pid=8282 comm="syz-executor542" path="/root/syz-executor542967297" dev="sda1" ino=15902 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 executing program executing program executing program executing program executing program executing program [ 57.132058][ T8298] ------------[ cut here ]------------ [ 57.137824][ T8298] percpu_ref_kill_and_confirm called more than once on io_ring_ctx_ref_free! [ 57.138167][ T8298] WARNING: CPU: 0 PID: 8298 at lib/percpu-refcount.c:335 percpu_ref_kill_and_confirm+0x341/0x3b0 [ 57.157994][ T8298] Kernel panic - not syncing: panic_on_warn set ... [ 57.164583][ T8298] CPU: 0 PID: 8298 Comm: syz-executor542 Not tainted 5.1.0-rc5+ #77 [ 57.172575][ T8298] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.182626][ T8298] Call Trace: [ 57.185912][ T8298] dump_stack+0x172/0x1f0 [ 57.190242][ T8298] ? percpu_ref_kill_and_confirm+0x340/0x3b0 [ 57.196256][ T8298] panic+0x2cb/0x65c [ 57.200242][ T8298] ? __warn_printk+0xf3/0xf3 [ 57.204832][ T8298] ? percpu_ref_kill_and_confirm+0x341/0x3b0 [ 57.210836][ T8298] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 57.217072][ T8298] ? __warn.cold+0x5/0x45 [ 57.221396][ T8298] ? __warn+0xe8/0x1d0 [ 57.226071][ T8298] ? percpu_ref_kill_and_confirm+0x341/0x3b0 [ 57.232063][ T8298] __warn.cold+0x20/0x45 [ 57.236307][ T8298] ? vprintk_emit+0x1ce/0x6d0 [ 57.241003][ T8298] ? percpu_ref_kill_and_confirm+0x341/0x3b0 [ 57.247160][ T8298] report_bug+0x263/0x2b0 [ 57.251505][ T8298] do_error_trap+0x11b/0x200 [ 57.256115][ T8298] do_invalid_op+0x37/0x50 [ 57.260529][ T8298] ? percpu_ref_kill_and_confirm+0x341/0x3b0 [ 57.266495][ T8298] invalid_op+0x14/0x20 [ 57.270667][ T8298] RIP: 0010:percpu_ref_kill_and_confirm+0x341/0x3b0 [ 57.277248][ T8298] 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 [ 57.296956][ T8298] RSP: 0018:ffff88809b8cfcf0 EFLAGS: 00010082 [ 57.303097][ T8298] RAX: 0000000000000000 RBX: 0000607f51430bbb RCX: 0000000000000000 [ 57.311085][ T8298] RDX: 0000000000000000 RSI: ffffffff815afcf6 RDI: ffffed1013719f90 [ 57.319050][ T8298] RBP: ffff88809b8cfd20 R08: ffff88808dbd0580 R09: fffffbfff1133639 [ 57.327050][ T8298] R10: fffffbfff1133638 R11: ffffffff8899b1c3 R12: ffff88808cb7e640 [ 57.335035][ T8298] R13: ffff88808cb7e648 R14: 0000000000000286 R15: 0000000000000000 [ 57.344108][ T8298] ? vprintk_func+0x86/0x189 [ 57.349733][ T8298] __io_uring_register+0xa7/0x1fe0 [ 57.354836][ T8298] ? __mutex_lock+0x3cd/0x1310 [ 57.359599][ T8298] ? __x64_sys_io_uring_register+0x182/0x1f0 [ 57.365573][ T8298] ? mutex_trylock+0x1e0/0x1e0 [ 57.370343][ T8298] ? io_sq_wq_submit_work+0x10f0/0x10f0 [ 57.375911][ T8298] ? kasan_check_write+0x14/0x20 [ 57.380882][ T8298] __x64_sys_io_uring_register+0x193/0x1f0 [ 57.386822][ T8298] do_syscall_64+0x103/0x610 [ 57.391419][ T8298] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 57.397330][ T8298] RIP: 0033:0x4467c9 [ 57.401233][ T8298] Code: e8 5c b3 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 0b 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 57.420920][ T8298] RSP: 002b:00007fec68384db8 EFLAGS: 00000246 ORIG_RAX: 00000000000001ab [ 57.430267][ T8298] RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 00000000004467c9 [ 57.438242][ T8298] RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000003 [ 57.446242][ T8298] RBP: 00000000006dbc30 R08: 00007fec68385700 R09: 0000000000000000 [ 57.454235][ T8298] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc3c [ 57.462233][ T8298] R13: 00007fff2dfd4e5f R14: 00007fec683859c0 R15: 20c49ba5e353f7cf [ 57.471185][ T8298] Kernel Offset: disabled [ 57.475613][ T8298] Rebooting in 86400 seconds..