Warning: Permanently added '10.128.0.159' (ECDSA) to the list of known hosts. [ 86.761452][ T6818] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 88.580317][ T1538] ------------[ cut here ]------------ [ 88.585989][ T1538] refcount_t: addition on 0; use-after-free. [ 88.592522][ T1538] WARNING: CPU: 0 PID: 1538 at lib/refcount.c:25 refcount_warn_saturate+0x169/0x1e0 [ 88.601933][ T1538] Kernel panic - not syncing: panic_on_warn set ... [ 88.608520][ T1538] CPU: 0 PID: 1538 Comm: kworker/u5:0 Not tainted 5.8.0-syzkaller #0 [ 88.616579][ T1538] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 88.626667][ T1538] Workqueue: hci0 hci_rx_work [ 88.631345][ T1538] Call Trace: [ 88.634659][ T1538] dump_stack+0x18f/0x20d [ 88.639013][ T1538] panic+0x2e3/0x75c [ 88.642914][ T1538] ? __warn_printk+0xf3/0xf3 [ 88.647504][ T1538] ? lockdep_hardirqs_on+0x76/0xf0 [ 88.652630][ T1538] ? __warn.cold+0x5/0x45 [ 88.656952][ T1538] ? __warn+0xd6/0x1f2 [ 88.661023][ T1538] ? refcount_warn_saturate+0x169/0x1e0 [ 88.666563][ T1538] __warn.cold+0x20/0x45 [ 88.670821][ T1538] ? wake_up_klogd.part.0+0x8c/0xc0 [ 88.676018][ T1538] ? refcount_warn_saturate+0x169/0x1e0 [ 88.681567][ T1538] report_bug+0x1bd/0x210 [ 88.685907][ T1538] handle_bug+0x38/0x90 [ 88.690076][ T1538] exc_invalid_op+0x14/0x40 [ 88.694593][ T1538] asm_exc_invalid_op+0x12/0x20 [ 88.699445][ T1538] RIP: 0010:refcount_warn_saturate+0x169/0x1e0 [ 88.705591][ T1538] Code: 07 31 ff 89 de e8 97 7f db fd 84 db 0f 85 36 ff ff ff e8 4a 83 db fd 48 c7 c7 a0 83 93 88 c6 05 9a da 13 07 01 e8 a9 94 ac fd <0f> 0b e9 17 ff ff ff e8 2b 83 db fd 0f b6 1d 7f da 13 07 31 ff 89 [ 88.725209][ T1538] RSP: 0018:ffffc90005527908 EFLAGS: 00010286 [ 88.731279][ T1538] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 88.739251][ T1538] RDX: ffff8880a4660080 RSI: ffffffff815d8eb7 RDI: fffff52000aa4f13 [ 88.747250][ T1538] RBP: 0000000000000002 R08: 0000000000000001 R09: ffff8880ae631927 [ 88.755223][ T1538] R10: 0000000000000000 R11: 0000000033353154 R12: dffffc0000000000 [ 88.763197][ T1538] R13: 0000000000000001 R14: ffff88809de3c000 R15: 0000000000000003 [ 88.771211][ T1538] ? vprintk_func+0x97/0x1a6 [ 88.775821][ T1538] ? refcount_warn_saturate+0x169/0x1e0 [ 88.781375][ T1538] l2cap_global_chan_by_psm+0x53f/0x5b0 [ 88.787047][ T1538] ? l2cap_chan_timeout+0x450/0x450 [ 88.792243][ T1538] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 88.798213][ T1538] ? mark_lock+0xbc/0x1710 [ 88.802618][ T1538] ? __lock_acquire+0x16cb/0x5640 [ 88.807636][ T1538] l2cap_recv_frame+0xc3b/0xae10 [ 88.812566][ T1538] ? hci_rx_work+0x35b/0xb50 [ 88.817165][ T1538] ? __lock_acquire+0xbb5/0x5640 [ 88.822104][ T1538] ? l2cap_config_rsp.isra.0+0x1130/0x1130 [ 88.827899][ T1538] ? find_held_lock+0x2d/0x110 [ 88.832654][ T1538] ? hci_rx_work+0x498/0xb50 [ 88.837239][ T1538] ? lock_downgrade+0x830/0x830 [ 88.842085][ T1538] ? lock_acquire+0x1f1/0xad0 [ 88.846752][ T1538] ? hci_rx_work+0x33d/0xb50 [ 88.851331][ T1538] ? find_held_lock+0x2d/0x110 [ 88.856088][ T1538] ? __mutex_unlock_slowpath+0xe2/0x610 [ 88.861627][ T1538] ? hci_conn_enter_active_mode+0x11a/0x2e0 [ 88.867519][ T1538] l2cap_recv_acldata+0x7f6/0x8e0 [ 88.872539][ T1538] hci_rx_work+0x4c7/0xb50 [ 88.876954][ T1538] process_one_work+0x94c/0x1670 [ 88.881897][ T1538] ? lock_release+0x8e0/0x8e0 [ 88.886583][ T1538] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 88.891968][ T1538] ? rwlock_bug.part.0+0x90/0x90 [ 88.896904][ T1538] worker_thread+0x64c/0x1120 [ 88.901585][ T1538] ? process_one_work+0x1670/0x1670 [ 88.906772][ T1538] kthread+0x3b5/0x4a0 [ 88.910964][ T1538] ? __kthread_bind_mask+0xc0/0xc0 [ 88.916067][ T1538] ? __kthread_bind_mask+0xc0/0xc0 [ 88.921175][ T1538] ret_from_fork+0x1f/0x30 [ 88.926845][ T1538] Kernel Offset: disabled [ 88.931257][ T1538] Rebooting in 86400 seconds..