Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.130' (ECDSA) to the list of known hosts. syzkaller login: [ 53.703839][ T6833] IPVS: ftp: loaded support on port[0] = 21 executing program [ 56.860612][ T5] Bluetooth: hci0: command 0x0409 tx timeout [ 58.939604][ T5] Bluetooth: hci0: command 0x041b tx timeout [ 59.814653][ T6863] ------------[ cut here ]------------ [ 59.820328][ T6863] ODEBUG: assert_init not available (active state 0) object type: timer_list hint: 0x0 [ 59.830166][ T6863] WARNING: CPU: 1 PID: 6863 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 59.839592][ T6863] Kernel panic - not syncing: panic_on_warn set ... [ 59.846154][ T6863] CPU: 1 PID: 6863 Comm: syz-executor863 Not tainted 5.8.0-rc7-syzkaller #0 [ 59.854793][ T6863] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.864819][ T6863] Call Trace: [ 59.868098][ T6863] dump_stack+0x18f/0x20d [ 59.872410][ T6863] panic+0x2e3/0x75c [ 59.876285][ T6863] ? __warn_printk+0xf3/0xf3 [ 59.880854][ T6863] ? console_unlock+0x7f0/0xf30 [ 59.885682][ T6863] ? __warn.cold+0x5/0x45 [ 59.889986][ T6863] ? __warn+0xd6/0x1f2 [ 59.894051][ T6863] ? debug_print_object+0x160/0x250 [ 59.899253][ T6863] __warn.cold+0x20/0x45 [ 59.903499][ T6863] ? wake_up_klogd.part.0+0x8c/0xc0 [ 59.908696][ T6863] ? debug_print_object+0x160/0x250 [ 59.913898][ T6863] report_bug+0x1bd/0x210 [ 59.918233][ T6863] handle_bug+0x38/0x90 [ 59.922385][ T6863] exc_invalid_op+0x13/0x40 [ 59.926881][ T6863] asm_exc_invalid_op+0x12/0x20 [ 59.931728][ T6863] RIP: 0010:debug_print_object+0x160/0x250 [ 59.937541][ T6863] Code: dd 40 ac 93 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd 40 ac 93 88 48 c7 c7 a0 a1 93 88 e8 b2 7e a9 fd <0f> 0b 83 05 bb 88 15 07 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 59.957136][ T6863] RSP: 0018:ffffc90005457578 EFLAGS: 00010082 [ 59.963187][ T6863] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000000000 [ 59.971132][ T6863] RDX: ffff88808e05c040 RSI: ffffffff815d3fe7 RDI: fffff52000a8aea1 [ 59.979075][ T6863] RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8880ae720fcb [ 59.987018][ T6863] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff89be0240 [ 59.994962][ T6863] R13: ffffffff8162fee0 R14: ffff88809f66c200 R15: 1ffff92000a8aeba [ 60.002917][ T6863] ? calc_wheel_index+0x230/0x230 [ 60.007918][ T6863] ? vprintk_func+0x97/0x1a6 [ 60.012487][ T6863] ? debug_print_object+0x160/0x250 [ 60.017662][ T6863] debug_object_assert_init+0x1f4/0x2e0 [ 60.023183][ T6863] ? find_held_lock+0x2d/0x110 [ 60.027926][ T6863] ? debug_object_init_on_stack+0x20/0x20 [ 60.033620][ T6863] ? __queue_work+0x653/0xff0 [ 60.038269][ T6863] ? lock_downgrade+0x820/0x820 [ 60.043096][ T6863] del_timer+0x6d/0x110 [ 60.047224][ T6863] ? detach_if_pending+0x4a0/0x4a0 [ 60.052307][ T6863] ? __queue_work+0x675/0xff0 [ 60.056956][ T6863] ? lockdep_hardirqs_off+0x66/0xa0 [ 60.062129][ T6863] ? trace_hardirqs_off+0x76/0x210 [ 60.067214][ T6863] cancel_delayed_work+0xe0/0x450 [ 60.072212][ T6863] ? mod_delayed_work_on+0x2e0/0x2e0 [ 60.077473][ T6863] ? lockdep_hardirqs_on+0x6a/0xe0 [ 60.082559][ T6863] ? queue_delayed_work_on+0x12f/0x210 [ 60.087992][ T6863] l2cap_chan_del+0x541/0x1300 [ 60.092729][ T6863] l2cap_chan_close+0x118/0xb10 [ 60.097552][ T6863] ? l2cap_retransmit_all+0x760/0x760 [ 60.102895][ T6863] ? __mutex_unlock_slowpath+0xe2/0x610 [ 60.108412][ T6863] ? rwlock_bug.part.0+0x90/0x90 [ 60.113321][ T6863] ? wait_for_completion+0x260/0x260 [ 60.118576][ T6863] ? __local_bh_enable_ip+0x159/0x250 [ 60.123922][ T6863] ? l2cap_sock_shutdown+0x2c4/0xe90 [ 60.129177][ T6863] ? trace_hardirqs_on+0x5f/0x220 [ 60.134178][ T6863] l2cap_sock_shutdown+0x3b8/0xe90 [ 60.139262][ T6863] ? lock_acquire+0x1f1/0xad0 [ 60.143915][ T6863] ? bt_sock_unlink+0x1d/0x1c0 [ 60.148650][ T6863] ? l2cap_sock_suspend_cb+0x80/0x80 [ 60.153906][ T6863] ? find_held_lock+0x2d/0x110 [ 60.158642][ T6863] ? l2cap_sock_release+0x56/0x1d0 [ 60.163735][ T6863] ? lock_downgrade+0x820/0x820 [ 60.168558][ T6863] ? do_raw_read_unlock+0x70/0x70 [ 60.173612][ T6863] ? __sock_release+0x280/0x280 [ 60.178433][ T6863] l2cap_sock_release+0x63/0x1d0 [ 60.183347][ T6863] ? __sock_release+0x280/0x280 [ 60.188185][ T6863] __sock_release+0xcd/0x280 [ 60.192750][ T6863] sock_close+0x18/0x20 [ 60.196879][ T6863] __fput+0x33c/0x880 [ 60.200837][ T6863] task_work_run+0xdd/0x190 [ 60.205313][ T6863] do_exit+0xb7d/0x29f0 [ 60.209450][ T6863] ? lock_acquire+0x1f1/0xad0 [ 60.214097][ T6863] ? find_held_lock+0x2d/0x110 [ 60.218869][ T6863] ? mm_update_next_owner+0x7a0/0x7a0 [ 60.224211][ T6863] ? get_signal+0x332/0x1ee0 [ 60.228775][ T6863] ? lock_downgrade+0x820/0x820 [ 60.233621][ T6863] ? lock_is_held_type+0xb0/0xe0 [ 60.238531][ T6863] do_group_exit+0x125/0x310 [ 60.243096][ T6863] get_signal+0x40b/0x1ee0 [ 60.247571][ T6863] ? __local_bh_enable_ip+0x159/0x250 [ 60.252918][ T6863] ? l2cap_sock_recv_cb+0x1e0/0x1e0 [ 60.258090][ T6863] do_signal+0x82/0x2520 [ 60.262306][ T6863] ? l2cap_sock_recv_cb+0x1e0/0x1e0 [ 60.267476][ T6863] ? __sys_connect_file+0x4e/0x1a0 [ 60.272562][ T6863] ? copy_siginfo_to_user32+0xa0/0xa0 [ 60.277904][ T6863] ? __sys_connect_file+0x1a0/0x1a0 [ 60.283082][ T6863] ? __prepare_exit_to_usermode+0xcc/0x1f0 [ 60.288860][ T6863] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.294814][ T6863] __prepare_exit_to_usermode+0x156/0x1f0 [ 60.300505][ T6863] do_syscall_64+0x6c/0xe0 [ 60.304913][ T6863] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 60.310777][ T6863] RIP: 0033:0x446d89 [ 60.314637][ T6863] Code: Bad RIP value. [ 60.318702][ T6863] RSP: 002b:00007ffd9a50ecc8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 60.327082][ T6863] RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 0000000000446d89 [ 60.335027][ T6863] RDX: 0000000000000080 RSI: 00000000200000c0 RDI: 0000000000000004 [ 60.342972][ T6863] RBP: 00007ffd9a50ed00 R08: 0000000000000000 R09: 00000000000000ff [ 60.350937][ T6863] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000004 [ 60.358878][ T6863] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 60.368106][ T6863] Kernel Offset: disabled [ 60.372499][ T6863] Rebooting in 86400 seconds..