Warning: Permanently added '10.128.10.45' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 56.776553][ T7031] 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 [ 60.231607][ T2962] Bluetooth: psm cannot be added err -98 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 75.219721][ T3523] ================================================================== [ 75.228016][ T3523] BUG: KASAN: use-after-free in l2cap_chan_close+0x763/0xb10 [ 75.235370][ T3523] Read of size 1 at addr ffff88808b1c2020 by task kworker/0:9/3523 [ 75.243295][ T3523] [ 75.245607][ T3523] CPU: 0 PID: 3523 Comm: kworker/0:9 Not tainted 5.7.0-rc6-syzkaller #0 [ 75.254442][ T3523] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.264916][ T3523] Workqueue: events do_enable_set [ 75.269914][ T3523] Call Trace: [ 75.273204][ T3523] dump_stack+0x188/0x20d [ 75.277514][ T3523] print_address_description.constprop.0.cold+0xd3/0x413 [ 75.284532][ T3523] ? mark_held_locks+0xe0/0xe0 [ 75.289285][ T3523] ? vprintk_func+0x81/0x17e [ 75.293877][ T3523] ? l2cap_chan_close+0x763/0xb10 [ 75.298878][ T3523] __kasan_report.cold+0x20/0x38 [ 75.303796][ T3523] ? l2cap_chan_close+0x763/0xb10 [ 75.308814][ T3523] ? l2cap_chan_close+0x763/0xb10 [ 75.313812][ T3523] kasan_report+0x33/0x50 [ 75.318120][ T3523] l2cap_chan_close+0x763/0xb10 [ 75.322946][ T3523] ? l2cap_send_i_or_rr_or_rnr+0x320/0x320 [ 75.328747][ T3523] ? lock_downgrade+0x840/0x840 [ 75.333575][ T3523] ? do_raw_spin_lock+0x129/0x2e0 [ 75.338602][ T3523] ? rwlock_bug.part.0+0x90/0x90 [ 75.343554][ T3523] do_enable_set+0x4cf/0x8e0 [ 75.348122][ T3523] ? lowpan_control_write+0x480/0x480 [ 75.353473][ T3523] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 75.359002][ T3523] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 75.364987][ T3523] ? _raw_spin_unlock_irq+0x1f/0x80 [ 75.370179][ T3523] process_one_work+0x965/0x16a0 [ 75.375123][ T3523] ? lock_release+0x800/0x800 [ 75.379866][ T3523] ? pwq_dec_nr_in_flight+0x310/0x310 [ 75.385230][ T3523] ? rwlock_bug.part.0+0x90/0x90 [ 75.390176][ T3523] worker_thread+0x96/0xe20 [ 75.394750][ T3523] ? process_one_work+0x16a0/0x16a0 [ 75.399924][ T3523] kthread+0x388/0x470 [ 75.403978][ T3523] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 75.409678][ T3523] ret_from_fork+0x24/0x30 [ 75.414074][ T3523] [ 75.416393][ T3523] Allocated by task 3523: [ 75.420699][ T3523] save_stack+0x1b/0x40 [ 75.424842][ T3523] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 75.430459][ T3523] kmem_cache_alloc_trace+0x153/0x7d0 [ 75.435805][ T3523] l2cap_chan_create+0x40/0x3a0 [ 75.440634][ T3523] chan_create+0xc/0xd0 [ 75.444783][ T3523] do_enable_set+0x511/0x8e0 [ 75.449364][ T3523] process_one_work+0x965/0x16a0 [ 75.454296][ T3523] worker_thread+0x96/0xe20 [ 75.458772][ T3523] kthread+0x388/0x470 [ 75.462817][ T3523] ret_from_fork+0x24/0x30 [ 75.467203][ T3523] [ 75.470636][ T3523] Freed by task 2962: [ 75.474612][ T3523] save_stack+0x1b/0x40 [ 75.478757][ T3523] __kasan_slab_free+0xf7/0x140 [ 75.483685][ T3523] kfree+0x109/0x2b0 [ 75.487564][ T3523] l2cap_chan_put+0x1b2/0x230 [ 75.492229][ T3523] do_enable_set+0x4db/0x8e0 [ 75.496805][ T3523] process_one_work+0x965/0x16a0 [ 75.501716][ T3523] worker_thread+0x96/0xe20 [ 75.506200][ T3523] kthread+0x388/0x470 [ 75.510254][ T3523] ret_from_fork+0x24/0x30 [ 75.514639][ T3523] [ 75.516960][ T3523] The buggy address belongs to the object at ffff88808b1c2000 [ 75.516960][ T3523] which belongs to the cache kmalloc-2k of size 2048 [ 75.531339][ T3523] The buggy address is located 32 bytes inside of [ 75.531339][ T3523] 2048-byte region [ffff88808b1c2000, ffff88808b1c2800) [ 75.544587][ T3523] The buggy address belongs to the page: [ 75.550197][ T3523] page:ffffea00022c7080 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 75.559279][ T3523] flags: 0xfffe0000000200(slab) [ 75.564122][ T3523] raw: 00fffe0000000200 ffffea0002162388 ffffea00021623c8 ffff8880aa000e00 [ 75.572697][ T3523] raw: 0000000000000000 ffff88808b1c2000 0000000100000001 0000000000000000 [ 75.581267][ T3523] page dumped because: kasan: bad access detected [ 75.587666][ T3523] [ 75.589983][ T3523] Memory state around the buggy address: [ 75.595613][ T3523] ffff88808b1c1f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 75.604981][ T3523] ffff88808b1c1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 75.613041][ T3523] >ffff88808b1c2000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb executing program [ 75.621093][ T3523] ^ [ 75.626188][ T3523] ffff88808b1c2080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 75.634232][ T3523] ffff88808b1c2100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 75.642285][ T3523] ================================================================== [ 75.650336][ T3523] Disabling lock debugging due to kernel taint [ 75.657781][ T3523] Kernel panic - not syncing: panic_on_warn set ... [ 75.664653][ T3523] CPU: 0 PID: 3523 Comm: kworker/0:9 Tainted: G B 5.7.0-rc6-syzkaller #0 [ 75.674824][ T3523] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.684877][ T3523] Workqueue: events do_enable_set [ 75.689889][ T3523] Call Trace: [ 75.693159][ T3523] dump_stack+0x188/0x20d [ 75.697469][ T3523] panic+0x2e3/0x75c [ 75.702476][ T3523] ? add_taint.cold+0x16/0x16 [ 75.707293][ T3523] ? preempt_schedule_common+0x5e/0xc0 [ 75.712733][ T3523] ? l2cap_chan_close+0x763/0xb10 [ 75.717751][ T3523] ? preempt_schedule_thunk+0x16/0x18 [ 75.723124][ T3523] ? trace_hardirqs_on+0x55/0x220 [ 75.728138][ T3523] ? l2cap_chan_close+0x763/0xb10 [ 75.733147][ T3523] end_report+0x4d/0x53 [ 75.737298][ T3523] __kasan_report.cold+0xd/0x38 [ 75.742136][ T3523] ? l2cap_chan_close+0x763/0xb10 [ 75.747143][ T3523] ? l2cap_chan_close+0x763/0xb10 [ 75.752145][ T3523] kasan_report+0x33/0x50 [ 75.756452][ T3523] l2cap_chan_close+0x763/0xb10 [ 75.761311][ T3523] ? l2cap_send_i_or_rr_or_rnr+0x320/0x320 [ 75.767532][ T3523] ? lock_downgrade+0x840/0x840 [ 75.772458][ T3523] ? do_raw_spin_lock+0x129/0x2e0 [ 75.777482][ T3523] ? rwlock_bug.part.0+0x90/0x90 [ 75.782416][ T3523] do_enable_set+0x4cf/0x8e0 [ 75.786993][ T3523] ? lowpan_control_write+0x480/0x480 [ 75.792369][ T3523] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 75.797896][ T3523] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 75.803879][ T3523] ? _raw_spin_unlock_irq+0x1f/0x80 [ 75.809144][ T3523] process_one_work+0x965/0x16a0 [ 75.814203][ T3523] ? lock_release+0x800/0x800 [ 75.818946][ T3523] ? pwq_dec_nr_in_flight+0x310/0x310 [ 75.824318][ T3523] ? rwlock_bug.part.0+0x90/0x90 [ 75.829259][ T3523] worker_thread+0x96/0xe20 [ 75.833755][ T3523] ? process_one_work+0x16a0/0x16a0 [ 75.838950][ T3523] kthread+0x388/0x470 [ 75.843015][ T3523] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 75.848735][ T3523] ret_from_fork+0x24/0x30 [ 75.855595][ T3523] Kernel Offset: disabled [ 75.859922][ T3523] Rebooting in 86400 seconds..