[ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.92' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 33.023065] ------------[ cut here ]------------ [ 33.028120] ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x90 [ 33.038369] WARNING: CPU: 1 PID: 8105 at lib/debugobjects.c:325 debug_print_object+0x160/0x250 [ 33.047104] Kernel panic - not syncing: panic_on_warn set ... [ 33.047104] [ 33.054454] CPU: 1 PID: 8105 Comm: syz-executor250 Not tainted 4.19.211-syzkaller #0 [ 33.062408] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.071753] Call Trace: [ 33.074351] dump_stack+0x1fc/0x2ef [ 33.077997] panic+0x26a/0x50e [ 33.081173] ? __warn_printk+0xf3/0xf3 [ 33.085051] ? debug_print_object+0x160/0x250 [ 33.089634] ? __probe_kernel_read+0x130/0x1b0 [ 33.094217] ? __warn.cold+0x5/0x5a [ 33.097826] ? __warn+0xe4/0x200 [ 33.101175] ? debug_print_object+0x160/0x250 [ 33.105651] __warn.cold+0x20/0x5a [ 33.109175] ? debug_print_object+0x160/0x250 [ 33.113654] report_bug+0x262/0x2b0 [ 33.117265] do_error_trap+0x1d7/0x310 [ 33.121130] ? math_error+0x310/0x310 [ 33.124913] ? irq_work_claim+0xa6/0xc0 [ 33.128869] ? irq_work_queue+0x29/0x80 [ 33.132830] ? error_entry+0x72/0xd0 [ 33.136525] ? trace_hardirqs_off_caller+0x2c/0x210 [ 33.141539] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.146378] invalid_op+0x14/0x20 [ 33.149820] RIP: 0010:debug_print_object+0x160/0x250 [ 33.154923] Code: dd 20 f1 b3 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd 20 f1 b3 88 48 c7 c7 40 e5 b3 88 e8 65 92 7b 04 <0f> 0b 83 05 73 e6 af 07 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 33.173823] RSP: 0018:ffff8880b14fef08 EFLAGS: 00010086 [ 33.179175] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 33.186629] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed101629fdd3 [ 33.193974] RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 [ 33.201402] R10: 0000000000000005 R11: ffffffff8c66505b R12: ffffffff89f90a40 [ 33.208656] R13: ffffffff815313f0 R14: ffff8880a17602d8 R15: dffffc0000000000 [ 33.215918] ? calc_wheel_index+0x230/0x230 [ 33.220226] ? vprintk_func+0x81/0x180 [ 33.224101] ? debug_print_object+0x160/0x250 [ 33.228604] ? __free_object+0xdd/0x1e0 [ 33.232560] debug_check_no_obj_freed+0x271/0x490 [ 33.237389] kfree+0xb9/0x210 [ 33.240483] ? xps_rxqs_show+0x6f0/0x6f0 [ 33.244530] kvfree+0x59/0x60 [ 33.247623] device_release+0x76/0x210 [ 33.251493] ? device_remove_bin_file+0x30/0x30 [ 33.256154] kobject_put+0x28b/0x5d0 [ 33.259866] put_device+0x1c/0x30 [ 33.263327] free_netdev+0x309/0x410 [ 33.267061] rtnl_newlink+0x13a3/0x15c0 [ 33.271024] ? rtnl_getlink+0x620/0x620 [ 33.275005] ? get_reg+0x1f0/0x1f0 [ 33.278540] ? get_reg+0x1f0/0x1f0 [ 33.282072] ? __lock_acquire+0x6de/0x3ff0 [ 33.286309] ? mark_held_locks+0xf0/0xf0 [ 33.290377] ? unwind_next_frame+0xeee/0x1400 [ 33.294854] ? __lock_acquire+0x6de/0x3ff0 [ 33.299088] ? get_reg+0x1f0/0x1f0 [ 33.302609] ? is_bpf_text_address+0xd5/0x1b0 [ 33.307100] ? mark_held_locks+0xf0/0xf0 [ 33.311151] ? unwind_next_frame+0xeee/0x1400 [ 33.315641] ? __save_stack_trace+0x72/0x190 [ 33.320077] ? deref_stack_reg+0x134/0x1d0 [ 33.324296] ? get_reg+0x176/0x1f0 [ 33.327917] ? __read_once_size_nocheck.constprop.0+0x10/0x10 [ 33.334574] ? deref_stack_reg+0x1d0/0x1d0 [ 33.339130] ? __lock_acquire+0x6de/0x3ff0 [ 33.343373] ? __lock_acquire+0x6de/0x3ff0 [ 33.347680] ? mark_held_locks+0xf0/0xf0 [ 33.351725] ? get_reg+0x1f0/0x1f0 [ 33.355466] ? unwind_next_frame+0xeee/0x1400 [ 33.359964] ? mutex_trylock+0x1a0/0x1a0 [ 33.364024] ? rtnl_getlink+0x620/0x620 [ 33.367993] rtnetlink_rcv_msg+0x453/0xb80 [ 33.372232] ? rtnl_calcit.isra.0+0x430/0x430 [ 33.376719] ? __netlink_lookup+0x3fc/0x730 [ 33.381030] ? lock_downgrade+0x720/0x720 [ 33.385222] ? check_preemption_disabled+0x41/0x280 [ 33.391020] netlink_rcv_skb+0x160/0x440 [ 33.395166] ? rtnl_calcit.isra.0+0x430/0x430 [ 33.399655] ? netlink_ack+0xae0/0xae0 [ 33.403534] netlink_unicast+0x4d5/0x690 [ 33.407581] ? netlink_sendskb+0x110/0x110 [ 33.411798] ? _copy_from_iter_full+0x229/0x7c0 [ 33.416450] ? __phys_addr_symbol+0x2c/0x70 [ 33.420756] ? __check_object_size+0x17b/0x3e0 [ 33.425330] netlink_sendmsg+0x6c3/0xc50 [ 33.429378] ? aa_af_perm+0x230/0x230 [ 33.433161] ? nlmsg_notify+0x1f0/0x1f0 [ 33.437115] ? kernel_recvmsg+0x220/0x220 [ 33.441246] ? nlmsg_notify+0x1f0/0x1f0 [ 33.445215] sock_sendmsg+0xc3/0x120 [ 33.448908] ___sys_sendmsg+0x7bb/0x8e0 [ 33.452868] ? mark_held_locks+0xf0/0xf0 [ 33.456913] ? copy_msghdr_from_user+0x440/0x440 [ 33.461665] ? apparmor_file_receive+0x160/0x160 [ 33.466404] ? __might_fault+0x11f/0x1d0 [ 33.470446] ? lock_downgrade+0x720/0x720 [ 33.474590] ? lock_acquire+0x170/0x3c0 [ 33.478627] ? __might_fault+0xef/0x1d0 [ 33.482609] ? __might_fault+0x192/0x1d0 [ 33.486701] ? _copy_to_user+0xb8/0x100 [ 33.490663] ? move_addr_to_user+0x190/0x1d0 [ 33.495057] ? __fdget+0x1a0/0x230 [ 33.498583] __x64_sys_sendmsg+0x132/0x220 [ 33.502802] ? __sys_sendmsg+0x1b0/0x1b0 [ 33.506851] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 33.512197] ? trace_hardirqs_off_caller+0x6e/0x210 [ 33.517200] ? do_syscall_64+0x21/0x620 [ 33.521250] do_syscall_64+0xf9/0x620 [ 33.525049] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.530222] RIP: 0033:0x7fc8262a4509 [ 33.533918] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 33.552799] RSP: 002b:00007ffca4e7a088 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 33.560489] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc8262a4509 [ 33.567737] RDX: 0000000020040000 RSI: 0000000020000080 RDI: 0000000000000004 [ 33.574987] RBP: 0000000000000003 R08: 000000000000000c R09: 65732f636f72702f [ 33.582248] R10: 0000000000000001 R11: 0000000000000246 R12: 00007fc826268490 [ 33.589498] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 33.597302] Kernel Offset: disabled [ 33.601039] Rebooting in 86400 seconds..