Warning: Permanently added '10.128.10.19' (ECDSA) to the list of known hosts.
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syzkaller login: [ 34.631218] audit: type=1400 audit(1596802587.318:8): avc: denied { execmem } for pid=6369 comm="syz-executor637" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
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[ 34.719747] ==================================================================
[ 34.728469] BUG: KASAN: use-after-free in l2cap_chan_close+0x4fb/0x770
[ 34.735131] Read of size 1 at addr ffff8880973716e0 by task kworker/0:2/3661
[ 34.742309]
[ 34.743941] CPU: 0 PID: 3661 Comm: kworker/0:2 Not tainted 4.14.193-syzkaller #0
[ 34.751558] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 34.760918] Workqueue: events do_enable_set
[ 34.765236] Call Trace:
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[ 34.767821] dump_stack+0x1b2/0x283
[ 34.771451] print_address_description.cold+0x54/0x1d3
[ 34.776728] kasan_report_error.cold+0x8a/0x194
[ 34.781397] ? l2cap_chan_close+0x4fb/0x770
[ 34.785713] __asan_report_load1_noabort+0x68/0x70
[ 34.790680] ? l2cap_chan_close+0x4fb/0x770
[ 34.795013] l2cap_chan_close+0x4fb/0x770
[ 34.799163] ? __set_monitor_timer+0x110/0x110
[ 34.803748] ? _raw_spin_unlock_irqrestore+0x66/0xe0
[ 34.808853] do_enable_set+0x473/0x8a0
[ 34.812925] ? lock_acquire+0x170/0x3f0
[ 34.816907] ? chan_recv_cb+0x970/0x970
[ 34.820909] ? rcu_lockdep_current_cpu_online+0xed/0x140
[ 34.826361] process_one_work+0x793/0x14a0
[ 34.830602] ? work_busy+0x320/0x320
[ 34.834318] ? worker_thread+0x158/0xff0
[ 34.838389] ? _raw_spin_unlock_irq+0x24/0x80
[ 34.842897] worker_thread+0x5cc/0xff0
[ 34.846790] ? rescuer_thread+0xc80/0xc80
[ 34.850967] kthread+0x30d/0x420
[ 34.854331] ? kthread_create_on_node+0xd0/0xd0
[ 34.858996] ret_from_fork+0x24/0x30
[ 34.862712]
[ 34.864331] Allocated by task 2688:
[ 34.867953] kasan_kmalloc+0xeb/0x160
[ 34.871751] kmem_cache_alloc_trace+0x131/0x3d0
[ 34.876424] l2cap_chan_create+0x3e/0x3c0
[ 34.880574] do_enable_set+0x4ac/0x8a0
[ 34.884467] process_one_work+0x793/0x14a0
[ 34.888696] worker_thread+0x5cc/0xff0
[ 34.892578] kthread+0x30d/0x420
[ 34.895940] ret_from_fork+0x24/0x30
[ 34.899641]
[ 34.901258] Freed by task 2688:
[ 34.904527] kasan_slab_free+0xc3/0x1a0
[ 34.908487] kfree+0xc9/0x250
[ 34.911589] l2cap_chan_put+0x152/0x1b0
[ 34.915546] do_enable_set+0x47f/0x8a0
[ 34.919407] process_one_work+0x793/0x14a0
[ 34.923616] worker_thread+0x5cc/0xff0
[ 34.927477] kthread+0x30d/0x420
[ 34.930843] ret_from_fork+0x24/0x30
[ 34.934527]
[ 34.936130] The buggy address belongs to the object at ffff8880973716c0
[ 34.936130] which belongs to the cache kmalloc-2048 of size 2048
[ 34.948946] The buggy address is located 32 bytes inside of
[ 34.948946] 2048-byte region [ffff8880973716c0, ffff888097371ec0)
[ 34.960793] The buggy address belongs to the page:
[ 34.965707] page:ffffea00025cdc00 count:1 mapcount:0 mapping:ffff8880973705c0 index:0x0 compound_mapcount: 0
[ 34.976711] flags: 0xfffe0000008100(slab|head)
[ 34.981376] raw: 00fffe0000008100 ffff8880973705c0 0000000000000000 0000000100000003
[ 34.989237] raw: ffffea00025e3620 ffffea00025cd0a0 ffff88812fe52c40 0000000000000000
[ 34.997109] page dumped because: kasan: bad access detected
[ 35.002792]
[ 35.004392] Memory state around the buggy address:
[ 35.009296] ffff888097371580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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[ 35.016632] ffff888097371600: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[ 35.023969] >ffff888097371680: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
[ 35.031303] ^
[ 35.037769] ffff888097371700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 35.045117] ffff888097371780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 35.052448] ==================================================================
[ 35.059804] Disabling lock debugging due to kernel taint
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[ 35.071962] Kernel panic - not syncing: panic_on_warn set ...
[ 35.071962]
[ 35.079431] CPU: 0 PID: 3661 Comm: kworker/0:2 Tainted: G B 4.14.193-syzkaller #0
[ 35.088319] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 35.097677] Workqueue: events do_enable_set
[ 35.101975] Call Trace:
[ 35.104540] dump_stack+0x1b2/0x283
[ 35.108142] panic+0x1f9/0x42d
[ 35.111311] ? add_taint.cold+0x16/0x16
[ 35.115260] ? ___preempt_schedule+0x16/0x18
[ 35.119646] kasan_end_report+0x43/0x49
[ 35.123607] kasan_report_error.cold+0xa7/0x194
[ 35.128252] ? l2cap_chan_close+0x4fb/0x770
[ 35.132548] __asan_report_load1_noabort+0x68/0x70
[ 35.137539] ? l2cap_chan_close+0x4fb/0x770
[ 35.141843] l2cap_chan_close+0x4fb/0x770
[ 35.146010] ? __set_monitor_timer+0x110/0x110
[ 35.150567] ? _raw_spin_unlock_irqrestore+0x66/0xe0
[ 35.155645] do_enable_set+0x473/0x8a0
[ 35.159509] ? lock_acquire+0x170/0x3f0
[ 35.163459] ? chan_recv_cb+0x970/0x970
[ 35.167408] ? rcu_lockdep_current_cpu_online+0xed/0x140
[ 35.172837] process_one_work+0x793/0x14a0
[ 35.177059] ? work_busy+0x320/0x320
[ 35.180745] ? worker_thread+0x158/0xff0
[ 35.184791] ? _raw_spin_unlock_irq+0x24/0x80
[ 35.189271] worker_thread+0x5cc/0xff0
[ 35.193134] ? rescuer_thread+0xc80/0xc80
[ 35.197263] kthread+0x30d/0x420
[ 35.200604] ? kthread_create_on_node+0xd0/0xd0
[ 35.205367] ret_from_fork+0x24/0x30
[ 35.210524] Kernel Offset: disabled
[ 35.214149] Rebooting in 86400 seconds..