Warning: Permanently added '10.128.0.218' (ECDSA) to the list of known hosts. syzkaller login: [ 61.909588] 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 [ 63.937663] Bluetooth: hci0: command 0x0409 tx timeout executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 66.016333] Bluetooth: hci0: command 0x041b tx timeout executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 68.095797] Bluetooth: hci0: command 0x040f tx timeout executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 70.185362] Bluetooth: hci0: command 0x0419 tx timeout executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 72.254932] Bluetooth: hci0: command 0x0405 tx timeout executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 96.262424] ================================================================== [ 96.269823] BUG: KASAN: use-after-free in __lock_acquire+0x2cb4/0x3ff0 [ 96.276469] Read of size 8 at addr ffff88809136cda0 by task kworker/0:2/4385 [ 96.283627] [ 96.285240] CPU: 0 PID: 4385 Comm: kworker/0:2 Not tainted 4.19.211-syzkaller #0 [ 96.292747] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 96.302083] Workqueue: events l2cap_chan_timeout [ 96.306812] Call Trace: [ 96.309379] dump_stack+0x1fc/0x2ef [ 96.312990] print_address_description.cold+0x54/0x219 [ 96.318335] kasan_report_error.cold+0x8a/0x1b9 [ 96.322993] ? __lock_acquire+0x2cb4/0x3ff0 [ 96.327294] __asan_report_load8_noabort+0x88/0x90 [ 96.332203] ? __lock_acquire+0x2cb4/0x3ff0 [ 96.336509] __lock_acquire+0x2cb4/0x3ff0 [ 96.340638] ? mark_held_locks+0xf0/0xf0 [ 96.344678] ? mark_held_locks+0xf0/0xf0 [ 96.348715] ? mark_held_locks+0xf0/0xf0 [ 96.352754] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 96.357316] ? finish_task_switch+0x1db/0x760 [ 96.361793] ? mutex_spin_on_owner+0x1c6/0x310 [ 96.366352] ? lock_downgrade+0x720/0x720 [ 96.370477] ? lock_acquire+0x170/0x3c0 [ 96.374430] ? __ww_mutex_wound+0x1c0/0x1c0 [ 96.378731] ? check_preemption_disabled+0x41/0x280 [ 96.383724] lock_acquire+0x170/0x3c0 [ 96.387503] ? lock_sock_nested+0x3b/0x110 [ 96.391716] _raw_spin_lock_bh+0x2f/0x40 [ 96.395771] ? lock_sock_nested+0x3b/0x110 [ 96.399981] lock_sock_nested+0x3b/0x110 [ 96.404018] l2cap_sock_teardown_cb+0xa0/0x6d0 [ 96.408579] ? trace_hardirqs_off+0x64/0x200 [ 96.412966] l2cap_chan_close+0x377/0x950 [ 96.417093] ? __set_monitor_timer+0x200/0x200 [ 96.421654] ? check_preemption_disabled+0x41/0x280 [ 96.426648] l2cap_chan_timeout+0x17e/0x2f0 [ 96.430946] process_one_work+0x864/0x1570 [ 96.435169] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 96.439830] worker_thread+0x64c/0x1130 [ 96.443781] ? __kthread_parkme+0x133/0x1e0 [ 96.448080] ? process_one_work+0x1570/0x1570 [ 96.452550] kthread+0x33f/0x460 [ 96.455892] ? kthread_park+0x180/0x180 [ 96.459845] ret_from_fork+0x24/0x30 [ 96.463546] [ 96.465148] Allocated by task 9694: [ 96.468755] __kmalloc+0x15a/0x3c0 [ 96.472279] sk_prot_alloc+0x1e2/0x2d0 [ 96.476153] sk_alloc+0x36/0xec0 [ 96.479496] l2cap_sock_alloc.constprop.0+0x31/0x210 [ 96.484572] l2cap_sock_create+0x123/0x1f0 [ 96.488783] bt_sock_create+0x154/0x2a0 [ 96.492732] __sock_create+0x3d8/0x740 [ 96.496596] __sys_socket+0xef/0x200 [ 96.500289] __x64_sys_socket+0x6f/0xb0 [ 96.504244] do_syscall_64+0xf9/0x620 [ 96.508034] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 96.513193] [ 96.514796] Freed by task 9694: [ 96.518053] kfree+0xcc/0x210 [ 96.521137] __sk_destruct+0x684/0x8a0 [ 96.524999] __sk_free+0x165/0x3b0 [ 96.528511] sk_free+0x3b/0x50 [ 96.531682] l2cap_sock_kill.part.0+0x124/0x150 [ 96.536329] l2cap_sock_release+0x1e6/0x290 [ 96.540629] __sock_release+0xcd/0x2a0 [ 96.544491] sock_close+0x15/0x20 [ 96.547919] __fput+0x2ce/0x890 [ 96.551191] task_work_run+0x148/0x1c0 [ 96.555055] exit_to_usermode_loop+0x251/0x2a0 [ 96.559611] do_syscall_64+0x538/0x620 [ 96.563475] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 96.568639] [ 96.570246] The buggy address belongs to the object at ffff88809136cd00 [ 96.570246] which belongs to the cache kmalloc-2048 of size 2048 [ 96.583064] The buggy address is located 160 bytes inside of [ 96.583064] 2048-byte region [ffff88809136cd00, ffff88809136d500) [ 96.594995] The buggy address belongs to the page: [ 96.599900] page:ffffea000244db00 count:1 mapcount:0 mapping:ffff88813bff0c40 index:0x0 compound_mapcount: 0 [ 96.609840] flags: 0xfff00000008100(slab|head) [ 96.614412] raw: 00fff00000008100 ffffea0002a4bd08 ffff88813bff1948 ffff88813bff0c40 [ 96.622276] raw: 0000000000000000 ffff88809136c480 0000000100000003 0000000000000000 [ 96.630142] page dumped because: kasan: bad access detected [ 96.635824] [ 96.637425] Memory state around the buggy address: [ 96.642330] ffff88809136cc80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 96.649675] ffff88809136cd00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 96.657018] >ffff88809136cd80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 96.664348] ^ [ 96.668730] ffff88809136ce00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 96.676062] ffff88809136ce80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 96.683392] ================================================================== [ 96.690724] Disabling lock debugging due to kernel taint [ 96.696150] Kernel panic - not syncing: panic_on_warn set ... [ 96.696150] [ 96.703504] CPU: 0 PID: 4385 Comm: kworker/0:2 Tainted: G B 4.19.211-syzkaller #0 [ 96.712397] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 96.721834] Workqueue: events l2cap_chan_timeout [ 96.726562] Call Trace: [ 96.729133] dump_stack+0x1fc/0x2ef [ 96.732739] panic+0x26a/0x50e [ 96.735907] ? __warn_printk+0xf3/0xf3 [ 96.739774] ? lock_downgrade+0x720/0x720 [ 96.743901] ? print_shadow_for_address+0xb8/0x114 [ 96.748807] ? trace_hardirqs_off+0x64/0x200 [ 96.753196] kasan_end_report+0x43/0x49 [ 96.757148] kasan_report_error.cold+0xa7/0x1b9 [ 96.761793] ? __lock_acquire+0x2cb4/0x3ff0 [ 96.766092] __asan_report_load8_noabort+0x88/0x90 [ 96.771000] ? __lock_acquire+0x2cb4/0x3ff0 [ 96.775297] __lock_acquire+0x2cb4/0x3ff0 [ 96.779422] ? mark_held_locks+0xf0/0xf0 [ 96.783460] ? mark_held_locks+0xf0/0xf0 [ 96.787498] ? mark_held_locks+0xf0/0xf0 [ 96.791535] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 96.796096] ? finish_task_switch+0x1db/0x760 [ 96.800571] ? mutex_spin_on_owner+0x1c6/0x310 [ 96.805128] ? lock_downgrade+0x720/0x720 [ 96.809253] ? lock_acquire+0x170/0x3c0 [ 96.813203] ? __ww_mutex_wound+0x1c0/0x1c0 [ 96.817505] ? check_preemption_disabled+0x41/0x280 [ 96.822498] lock_acquire+0x170/0x3c0 [ 96.826293] ? lock_sock_nested+0x3b/0x110 [ 96.830506] _raw_spin_lock_bh+0x2f/0x40 [ 96.834554] ? lock_sock_nested+0x3b/0x110 [ 96.838765] lock_sock_nested+0x3b/0x110 [ 96.842804] l2cap_sock_teardown_cb+0xa0/0x6d0 [ 96.847379] ? trace_hardirqs_off+0x64/0x200 [ 96.851765] l2cap_chan_close+0x377/0x950 [ 96.855890] ? __set_monitor_timer+0x200/0x200 [ 96.860450] ? check_preemption_disabled+0x41/0x280 [ 96.865442] l2cap_chan_timeout+0x17e/0x2f0 [ 96.869741] process_one_work+0x864/0x1570 [ 96.873955] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 96.878603] worker_thread+0x64c/0x1130 [ 96.882555] ? __kthread_parkme+0x133/0x1e0 [ 96.886853] ? process_one_work+0x1570/0x1570 [ 96.891326] kthread+0x33f/0x460 [ 96.894669] ? kthread_park+0x180/0x180 [ 96.898622] ret_from_fork+0x24/0x30 [ 96.902484] Kernel Offset: disabled [ 96.906092] Rebooting in 86400 seconds..