Warning: Permanently added '10.128.0.7' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 485.474684][ T2983] Bluetooth: hci0: command 0x0409 tx timeout [ 487.553630][ T1286] Bluetooth: hci0: command 0x041b tx timeout [ 489.633462][ T1286] Bluetooth: hci0: command 0x040f tx timeout [ 491.713236][ T1286] Bluetooth: hci0: command 0x0419 tx timeout [ 493.792984][ T1286] Bluetooth: hci0: command 0x0405 tx timeout [ 605.543360][ T1286] Bluetooth: hci0: command 0x0406 tx timeout [ 716.096822][ T27] INFO: task krfcommd:2878 blocked for more than 143 seconds. [ 716.104576][ T27] Not tainted 5.14.0-rc7-next-20210826-syzkaller #0 [ 716.113104][ T27] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 716.122255][ T27] task:krfcommd state:D stack:29112 pid: 2878 ppid: 2 flags:0x00004000 [ 716.132374][ T27] Call Trace: [ 716.135675][ T27] __schedule+0x940/0x26f0 [ 716.140655][ T27] ? io_schedule_timeout+0x140/0x140 [ 716.146186][ T27] schedule+0xd3/0x270 [ 716.150871][ T27] schedule_preempt_disabled+0xf/0x20 [ 716.156292][ T27] __mutex_lock+0xa34/0x12f0 [ 716.161497][ T27] ? rfcomm_run+0x2ed/0x4a20 [ 716.166187][ T27] ? mutex_lock_io_nested+0x1150/0x1150 [ 716.172451][ T27] ? lock_downgrade+0x6e0/0x6e0 [ 716.177552][ T27] rfcomm_run+0x2ed/0x4a20 [ 716.182005][ T27] ? find_held_lock+0x2d/0x110 [ 716.187446][ T27] ? rfcomm_check_accept+0x240/0x240 [ 716.192772][ T27] ? lock_downgrade+0x6e0/0x6e0 [ 716.198074][ T27] ? __init_waitqueue_head+0xd0/0xd0 [ 716.203579][ T27] ? _raw_spin_unlock_irqrestore+0x50/0x70 [ 716.209937][ T27] ? lockdep_hardirqs_on+0x79/0x100 [ 716.215586][ T27] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 716.222750][ T27] ? __kthread_parkme+0x15f/0x220 [ 716.228044][ T27] ? rfcomm_check_accept+0x240/0x240 [ 716.233406][ T27] kthread+0x3e5/0x4d0 [ 716.237901][ T27] ? set_kthread_struct+0x130/0x130 [ 716.243140][ T27] ret_from_fork+0x1f/0x30 [ 716.248057][ T27] INFO: task syz-executor410:6580 blocked for more than 143 seconds. [ 716.256152][ T27] Not tainted 5.14.0-rc7-next-20210826-syzkaller #0 [ 716.263674][ T27] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 716.272825][ T27] task:syz-executor410 state:D stack:27528 pid: 6580 ppid: 6548 flags:0x00004006 [ 716.282495][ T27] Call Trace: [ 716.285867][ T27] __schedule+0x940/0x26f0 [ 716.290883][ T27] ? io_schedule_timeout+0x140/0x140 [ 716.296231][ T27] ? mark_held_locks+0x9f/0xe0 [ 716.301597][ T27] schedule+0xd3/0x270 [ 716.305821][ T27] __lock_sock+0x13d/0x260 [ 716.310998][ T27] ? sock_omalloc+0x180/0x180 [ 716.315848][ T27] ? __rfcomm_dlc_close+0x162/0x8a0 [ 716.322148][ T27] ? finish_wait+0x270/0x270 [ 716.327143][ T27] ? rwlock_bug.part.0+0x90/0x90 [ 716.332123][ T27] lock_sock_nested+0xf6/0x120 [ 716.337372][ T27] rfcomm_sk_state_change+0xb4/0x390 [ 716.342707][ T27] __rfcomm_dlc_close+0x1b6/0x8a0 [ 716.348554][ T27] rfcomm_dlc_close+0x1ea/0x240 [ 716.353628][ T27] __rfcomm_sock_close+0xac/0x260 [ 716.359352][ T27] rfcomm_sock_shutdown+0xe9/0x210 [ 716.364498][ T27] rfcomm_sock_release+0x5f/0x140 [ 716.369934][ T27] __sock_release+0xcd/0x280 [ 716.374632][ T27] sock_close+0x18/0x20 [ 716.379211][ T27] __fput+0x288/0x9f0 [ 716.383293][ T27] ? __sock_release+0x280/0x280 [ 716.388565][ T27] task_work_run+0xdd/0x1a0 [ 716.393531][ T27] do_exit+0xbae/0x2a30 [ 716.398179][ T27] ? mm_update_next_owner+0x7a0/0x7a0 [ 716.403667][ T27] ? lock_downgrade+0x6e0/0x6e0 [ 716.408958][ T27] do_group_exit+0x125/0x310 [ 716.413576][ T27] get_signal+0x47f/0x2160 [ 716.418482][ T27] ? lock_downgrade+0x6e0/0x6e0 [ 716.423472][ T27] arch_do_signal_or_restart+0x2a9/0x1c40 [ 716.429733][ T27] ? rfcomm_sock_connect+0x15f/0x460 [ 716.435077][ T27] ? rfcomm_sock_getname+0x300/0x300 [ 716.440955][ T27] ? __sys_connect_file+0x4e/0x1a0 [ 716.446124][ T27] ? get_sigframe_size+0x10/0x10 [ 716.451586][ T27] ? __sys_connect_file+0x1a0/0x1a0 [ 716.457195][ T27] exit_to_user_mode_prepare+0x17d/0x290 [ 716.462941][ T27] syscall_exit_to_user_mode+0x19/0x60 [ 716.469049][ T27] do_syscall_64+0x42/0xb0 [ 716.473570][ T27] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 716.479866][ T27] RIP: 0033:0x445ff9 [ 716.483777][ T27] RSP: 002b:00007ffe6c26c038 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 716.492792][ T27] RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 0000000000445ff9 [ 716.501083][ T27] RDX: 0000000000000080 RSI: 0000000020000000 RDI: 0000000000000005 [ 716.509386][ T27] RBP: 0000000000000004 R08: 000000ff00000001 R09: 000000ff00000001 [ 716.517517][ T27] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000018172b8 [ 716.525510][ T27] R13: 0000000000000072 R14: 00007ffe6c26c090 R15: 0000000000000003 [ 716.533682][ T27] [ 716.533682][ T27] Showing all locks held in the system: [ 716.541645][ T27] 1 lock held by khungtaskd/27: [ 716.546572][ T27] #0: ffffffff8b97f800 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 716.556746][ T27] 1 lock held by krfcommd/2878: [ 716.561608][ T27] #0: ffffffff8d31d688 (rfcomm_mutex){+.+.}-{3:3}, at: rfcomm_run+0x2ed/0x4a20 [ 716.571478][ T27] 1 lock held by in:imklog/6446: [ 716.576432][ T27] #0: ffff88806f0354f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 716.585998][ T27] 4 locks held by syz-executor410/6580: [ 716.591602][ T27] #0: ffff88806c421a10 (&sb->s_type->i_mutex_key#13){+.+.}-{3:3}, at: __sock_release+0x86/0x280 [ 716.602467][ T27] #1: ffff8881417c3120 (sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM){+.+.}-{0:0}, at: rfcomm_sock_shutdown+0x54/0x210 [ 716.614807][ T27] #2: ffffffff8d31d688 (rfcomm_mutex){+.+.}-{3:3}, at: rfcomm_dlc_close+0x34/0x240 [ 716.624591][ T27] #3: ffff8881478b4128 (&d->lock){+.+.}-{3:3}, at: __rfcomm_dlc_close+0x162/0x8a0 [ 716.634232][ T27] [ 716.636638][ T27] ============================================= [ 716.636638][ T27] [ 716.645156][ T27] NMI backtrace for cpu 0 [ 716.649492][ T27] CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.14.0-rc7-next-20210826-syzkaller #0 [ 716.658863][ T27] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.668912][ T27] Call Trace: [ 716.672196][ T27] dump_stack_lvl+0xcd/0x134 [ 716.676866][ T27] nmi_cpu_backtrace.cold+0x47/0x144 [ 716.682143][ T27] ? lapic_can_unplug_cpu+0x80/0x80 [ 716.687378][ T27] nmi_trigger_cpumask_backtrace+0x1ae/0x220 [ 716.693503][ T27] watchdog+0xcb7/0xed0 [ 716.698552][ T27] ? trace_sched_process_hang+0x280/0x280 [ 716.704274][ T27] kthread+0x3e5/0x4d0 [ 716.708420][ T27] ? set_kthread_struct+0x130/0x130 [ 716.713619][ T27] ret_from_fork+0x1f/0x30 [ 716.718155][ T27] Sending NMI from CPU 0 to CPUs 1: [ 716.723469][ C1] NMI backtrace for cpu 1 [ 716.723481][ C1] CPU: 1 PID: 2956 Comm: systemd-journal Not tainted 5.14.0-rc7-next-20210826-syzkaller #0 [ 716.723506][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.723518][ C1] RIP: 0010:__sanitizer_cov_trace_pc+0x1c/0x60 [ 716.723550][ C1] Code: 8b 45 00 48 63 c9 e9 64 ff ff ff 0f 1f 00 65 8b 05 f9 0d 8c 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 40 f0 01 00 00 01 ff 00 74 0e 85 c9 74 35 8b 82 3c 15 00 00 85 c0 74 2b 8b [ 716.723570][ C1] RSP: 0018:ffffc900024efd20 EFLAGS: 00000246 [ 716.723588][ C1] RAX: 0000000080000000 RBX: ffff88801a6d6620 RCX: 0000000000000000 [ 716.723602][ C1] RDX: ffff88807c11b900 RSI: ffffffff81348e26 RDI: ffff88801a6d6620 [ 716.723617][ C1] RBP: 0000000080000000 R08: 0000000000000000 R09: 0000000000000001 [ 716.723630][ C1] R10: ffffffff81c4c90a R11: 0000000000000000 R12: 0000000000000000 [ 716.723644][ C1] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8d6e8188 [ 716.723657][ C1] FS: 00007fb5e53908c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 716.723676][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 716.723691][ C1] CR2: 00007fb5e2767010 CR3: 000000001e2fd000 CR4: 00000000001506e0 [ 716.723705][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 716.723718][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 716.723731][ C1] Call Trace: [ 716.723737][ C1] __phys_addr+0x16/0x140 [ 716.723822][ C1] __check_object_size+0x1b5/0x3f0 [ 716.723882][ C1] strncpy_from_user+0xaa/0x3e0 [ 716.723911][ C1] getname_flags.part.0+0x95/0x4f0 [ 716.723939][ C1] ? projid_m_show+0x220/0x220 [ 716.723964][ C1] getname_flags+0x9a/0xe0 [ 716.723991][ C1] user_path_at_empty+0x2b/0x90 [ 716.724018][ C1] do_faccessat+0x127/0x850 [ 716.724046][ C1] ? stream_open+0x60/0x60 [ 716.724072][ C1] ? __secure_computing+0x104/0x360 [ 716.724100][ C1] do_syscall_64+0x35/0xb0 [ 716.724128][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 716.724156][ C1] RIP: 0033:0x7fb5e464b9c7 [ 716.724171][ C1] Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48 [ 716.724191][ C1] RSP: 002b:00007ffeb6899798 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 [ 716.724211][ C1] RAX: ffffffffffffffda RBX: 00007ffeb689c6b0 RCX: 00007fb5e464b9c7 [ 716.724225][ C1] RDX: 00007fb5e50bca00 RSI: 0000000000000000 RDI: 000055e6475159a3 [ 716.724239][ C1] RBP: 00007ffeb68997d0 R08: 0000000000000000 R09: 0000000000000000 [ 716.724253][ C1] R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 [ 716.724265][ C1] R13: 0000000000000000 R14: 00007ffeb689c6b0 R15: 00007ffeb6899cc0 [ 716.724718][ T27] Kernel panic - not syncing: hung_task: blocked tasks [ 717.002399][ T27] CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.14.0-rc7-next-20210826-syzkaller #0 [ 717.011772][ T27] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 717.021823][ T27] Call Trace: [ 717.025101][ T27] dump_stack_lvl+0xcd/0x134 [ 717.029705][ T27] panic+0x2b0/0x6dd [ 717.033610][ T27] ? __warn_printk+0xf3/0xf3 [ 717.038209][ T27] ? lapic_can_unplug_cpu+0x80/0x80 [ 717.043417][ T27] ? preempt_schedule_thunk+0x16/0x18 [ 717.048802][ T27] ? nmi_trigger_cpumask_backtrace+0x191/0x220 [ 717.054994][ T27] ? watchdog.cold+0x1b9/0x1de [ 717.059804][ T27] watchdog.cold+0x1ca/0x1de [ 717.064406][ T27] ? trace_sched_process_hang+0x280/0x280 [ 717.070155][ T27] kthread+0x3e5/0x4d0 [ 717.074326][ T27] ? set_kthread_struct+0x130/0x130 [ 717.079534][ T27] ret_from_fork+0x1f/0x30 [ 717.085841][ T27] Kernel Offset: disabled [ 717.090305][ T27] Rebooting in 86400 seconds..