[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 85.901547][ T27] audit: type=1800 audit(1578712081.408:25): pid=9620 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 85.929860][ T27] audit: type=1800 audit(1578712081.408:26): pid=9620 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 85.970608][ T27] audit: type=1800 audit(1578712081.408:27): pid=9620 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 '10.128.0.15' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 103.313005][ T9777] ------------[ cut here ]------------ [ 103.318674][ T9777] ODEBUG: free active (active state 0) object type: timer_list hint: rfcomm_dlc_timeout+0x0/0xe0 [ 103.329429][ T9777] WARNING: CPU: 0 PID: 9777 at lib/debugobjects.c:481 debug_print_object+0x168/0x250 [ 103.338878][ T9777] Kernel panic - not syncing: panic_on_warn set ... [ 103.345463][ T9777] CPU: 0 PID: 9777 Comm: syz-executor475 Not tainted 5.5.0-rc5-next-20200110-syzkaller #0 [ 103.355389][ T9777] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 103.365453][ T9777] Call Trace: [ 103.368753][ T9777] dump_stack+0x197/0x210 [ 103.373071][ T9777] ? debug_print_object+0x130/0x250 [ 103.378263][ T9777] panic+0x2e3/0x75c [ 103.382139][ T9777] ? add_taint.cold+0x16/0x16 [ 103.386817][ T9777] ? __kasan_check_write+0x14/0x20 [ 103.392703][ T9777] ? __warn.cold+0x14/0x3e [ 103.397109][ T9777] ? __warn+0xd9/0x1cf [ 103.401163][ T9777] ? debug_print_object+0x168/0x250 [ 103.406341][ T9777] __warn.cold+0x2f/0x3e [ 103.410567][ T9777] ? debug_print_object+0x168/0x250 [ 103.415748][ T9777] report_bug+0x289/0x300 [ 103.420059][ T9777] do_error_trap+0x11b/0x200 [ 103.424631][ T9777] do_invalid_op+0x37/0x50 [ 103.429042][ T9777] ? debug_print_object+0x168/0x250 [ 103.444049][ T9777] invalid_op+0x23/0x30 [ 103.448190][ T9777] RIP: 0010:debug_print_object+0x168/0x250 [ 103.454001][ T9777] Code: dd 00 97 91 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd 00 97 91 88 48 c7 c7 60 8c 91 88 e8 97 61 a2 fd <0f> 0b 83 05 d3 86 01 07 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 [ 103.473593][ T9777] RSP: 0018:ffffc90002047a48 EFLAGS: 00010086 [ 103.479639][ T9777] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 103.487679][ T9777] RDX: 0000000000000000 RSI: ffffffff815e6386 RDI: fffff52000408f3b [ 103.495633][ T9777] RBP: ffffc90002047a88 R08: ffff888096c82200 R09: ffffed1015d045c9 [ 103.503585][ T9777] R10: ffffed1015d045c8 R11: ffff8880ae822e43 R12: 0000000000000001 [ 103.511541][ T9777] R13: ffffffff89bb8d00 R14: ffffffff81644cf0 R15: ffff8880a95443f0 [ 103.519521][ T9777] ? calc_wheel_index+0x220/0x220 [ 103.524556][ T9777] ? vprintk_func+0x86/0x189 [ 103.529135][ T9777] ? debug_print_object+0x168/0x250 [ 103.534315][ T9777] debug_check_no_obj_freed+0x2d4/0x43f [ 103.539844][ T9777] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 103.545393][ T9777] kfree+0xf8/0x2c0 [ 103.549196][ T9777] rfcomm_dlc_free+0x20/0x30 [ 103.553795][ T9777] rfcomm_dev_ioctl+0x1ba7/0x1e90 [ 103.558813][ T9777] ? mark_held_locks+0xa4/0xf0 [ 103.563566][ T9777] ? __local_bh_enable_ip+0x15a/0x270 [ 103.568930][ T9777] ? rfcomm_tty_install+0x1e0/0x1e0 [ 103.574118][ T9777] ? lock_sock_nested+0x9a/0x120 [ 103.579043][ T9777] ? trace_hardirqs_on+0x67/0x240 [ 103.584050][ T9777] ? __local_bh_enable_ip+0x15a/0x270 [ 103.589409][ T9777] rfcomm_sock_ioctl+0x90/0xb0 [ 103.594159][ T9777] sock_do_ioctl+0xd8/0x2f0 [ 103.598648][ T9777] ? compat_ifr_data_ioctl+0x160/0x160 [ 103.604091][ T9777] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 103.609980][ T9777] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 103.616265][ T9777] ? do_vfs_ioctl+0x11f/0x12e0 [ 103.621038][ T9777] ? ioctl_file_clone+0x180/0x180 [ 103.626055][ T9777] sock_ioctl+0x3ed/0x790 [ 103.630394][ T9777] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 103.636665][ T9777] ? dlci_ioctl_set+0x40/0x40 [ 103.641361][ T9777] ? tomoyo_file_ioctl+0x23/0x30 [ 103.646298][ T9777] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 103.652620][ T9777] ? security_file_ioctl+0x8d/0xc0 [ 103.657762][ T9777] ? dlci_ioctl_set+0x40/0x40 [ 103.662479][ T9777] ksys_ioctl+0x123/0x180 [ 103.666815][ T9777] __x64_sys_ioctl+0x73/0xb0 [ 103.671417][ T9777] do_syscall_64+0xfa/0x790 [ 103.675918][ T9777] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 103.681806][ T9777] RIP: 0033:0x4412b9 [ 103.685705][ T9777] 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 [ 103.705324][ T9777] RSP: 002b:00007fffc00ec088 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 103.713741][ T9777] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 103.721699][ T9777] RDX: 0000000020000100 RSI: 00000000400452c8 RDI: 0000000000000004 [ 103.729670][ T9777] RBP: 000000000001935e R08: 00000000004002c8 R09: 00000000004002c8 [ 103.737623][ T9777] R10: 00000000004002c8 R11: 0000000000000246 R12: 00000000004020e0 [ 103.745574][ T9777] R13: 0000000000402170 R14: 0000000000000000 R15: 0000000000000000 [ 103.755062][ T9777] Kernel Offset: disabled [ 103.759476][ T9777] Rebooting in 86400 seconds..