[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 98.934922][ T27] audit: type=1800 audit(1578579388.511:25): pid=9530 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 98.960529][ T27] audit: type=1800 audit(1578579388.511:26): pid=9530 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 99.016269][ T27] audit: type=1800 audit(1578579388.511:27): pid=9530 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.187' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 115.666883][ T9685] ------------[ cut here ]------------ [ 115.672616][ T9685] ODEBUG: free active (active state 0) object type: timer_list hint: rfcomm_dlc_timeout+0x0/0xe0 [ 115.683502][ T9685] WARNING: CPU: 1 PID: 9685 at lib/debugobjects.c:481 debug_print_object+0x168/0x250 [ 115.695116][ T9685] Kernel panic - not syncing: panic_on_warn set ... [ 115.701701][ T9685] CPU: 1 PID: 9685 Comm: syz-executor454 Not tainted 5.5.0-rc5-syzkaller #0 [ 115.710349][ T9685] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 115.720389][ T9685] Call Trace: [ 115.723692][ T9685] dump_stack+0x197/0x210 [ 115.728028][ T9685] ? debug_print_object+0xa0/0x250 [ 115.733124][ T9685] panic+0x2e3/0x75c [ 115.737014][ T9685] ? add_taint.cold+0x16/0x16 [ 115.741684][ T9685] ? __kasan_check_write+0x14/0x20 [ 115.746783][ T9685] ? __warn.cold+0x14/0x3e [ 115.751193][ T9685] ? __warn+0xd9/0x1cf [ 115.755295][ T9685] ? debug_print_object+0x168/0x250 [ 115.760483][ T9685] __warn.cold+0x2f/0x3e [ 115.764711][ T9685] ? debug_print_object+0x168/0x250 [ 115.769915][ T9685] report_bug+0x289/0x300 [ 115.774232][ T9685] do_error_trap+0x11b/0x200 [ 115.778806][ T9685] do_invalid_op+0x37/0x50 [ 115.783204][ T9685] ? debug_print_object+0x168/0x250 [ 115.788386][ T9685] invalid_op+0x23/0x30 [ 115.792534][ T9685] RIP: 0010:debug_print_object+0x168/0x250 [ 115.798340][ T9685] Code: dd 00 87 71 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd 00 87 71 88 48 c7 c7 60 7c 71 88 e8 97 1a a6 fd <0f> 0b 83 05 43 fd db 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 [ 115.817934][ T9685] RSP: 0018:ffffc90001e278b8 EFLAGS: 00010082 [ 115.824002][ T9685] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 115.831978][ T9685] RDX: 0000000000000000 RSI: ffffffff815e8506 RDI: fffff520003c4f09 [ 115.839941][ T9685] RBP: ffffc90001e278f8 R08: ffff888096af81c0 R09: ffffed1015d245c9 [ 115.847906][ T9685] R10: ffffed1015d245c8 R11: ffff8880ae922e43 R12: 0000000000000001 [ 115.855881][ T9685] R13: ffffffff899af680 R14: ffffffff816454b0 R15: ffff8880a90977e0 [ 115.863848][ T9685] ? calc_wheel_index+0x220/0x220 [ 115.868858][ T9685] ? vprintk_func+0x86/0x189 [ 115.873432][ T9685] ? debug_print_object+0x168/0x250 [ 115.878619][ T9685] debug_check_no_obj_freed+0x2d4/0x43f [ 115.884176][ T9685] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 115.889720][ T9685] kfree+0xf8/0x2c0 [ 115.893539][ T9685] rfcomm_dlc_free+0x20/0x30 [ 115.898118][ T9685] rfcomm_dev_ioctl+0x1b9d/0x1e80 [ 115.903235][ T9685] ? mark_held_locks+0xa4/0xf0 [ 115.907985][ T9685] ? lock_sock_nested+0xe2/0x120 [ 115.912905][ T9685] ? rfcomm_tty_install+0x1e0/0x1e0 [ 115.918088][ T9685] ? lock_sock_nested+0x9a/0x120 [ 115.923010][ T9685] ? trace_hardirqs_on+0x67/0x240 [ 115.928030][ T9685] ? __local_bh_enable_ip+0x15a/0x270 [ 115.933398][ T9685] rfcomm_sock_ioctl+0x90/0xb0 [ 115.938160][ T9685] sock_do_ioctl+0xd8/0x2f0 [ 115.942662][ T9685] ? compat_ifr_data_ioctl+0x160/0x160 [ 115.948105][ T9685] ? tomoyo_path_number_perm+0x454/0x520 [ 115.953759][ T9685] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 115.959985][ T9685] ? tomoyo_path_number_perm+0x25e/0x520 [ 115.965605][ T9685] sock_ioctl+0x3ed/0x790 [ 115.969919][ T9685] ? dlci_ioctl_set+0x40/0x40 [ 115.974580][ T9685] ? __fd_install+0x1bc/0x640 [ 115.979242][ T9685] ? dlci_ioctl_set+0x40/0x40 [ 115.983906][ T9685] do_vfs_ioctl+0x977/0x14e0 [ 115.988485][ T9685] ? compat_ioctl_preallocate+0x220/0x220 [ 115.994187][ T9685] ? __kasan_check_read+0x11/0x20 [ 115.999197][ T9685] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 116.005509][ T9685] ? __fd_install+0x1fb/0x640 [ 116.010172][ T9685] ? tomoyo_file_ioctl+0x23/0x30 [ 116.015107][ T9685] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 116.021329][ T9685] ? security_file_ioctl+0x8d/0xc0 [ 116.026423][ T9685] ksys_ioctl+0xab/0xd0 [ 116.030592][ T9685] __x64_sys_ioctl+0x73/0xb0 [ 116.035173][ T9685] do_syscall_64+0xfa/0x790 [ 116.039672][ T9685] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 116.045544][ T9685] RIP: 0033:0x4412b9 [ 116.049425][ T9685] Code: e8 fc ab 02 00 48 83 c4 18 c3 0f 1f 80 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 0f 83 9b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 116.069024][ T9685] RSP: 002b:00007ffd153bf068 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 116.077432][ T9685] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 116.085387][ T9685] RDX: 0000000020000100 RSI: 00000000400452c8 RDI: 0000000000000004 [ 116.093338][ T9685] RBP: 000000000001c3a8 R08: 00000000004002c8 R09: 00000000004002c8 [ 116.101295][ T9685] R10: 00000000004002c8 R11: 0000000000000246 R12: 00000000004020e0 [ 116.109247][ T9685] R13: 0000000000402170 R14: 0000000000000000 R15: 0000000000000000 [ 116.118744][ T9685] Kernel Offset: disabled [ 116.123140][ T9685] Rebooting in 86400 seconds..