[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 60.283283][ T26] audit: type=1800 audit(1572013083.658:25): pid=8664 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 60.328773][ T26] audit: type=1800 audit(1572013083.658:26): pid=8664 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 60.362765][ T26] audit: type=1800 audit(1572013083.668:27): pid=8664 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 '10.128.0.197' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 97.068642][ T8820] ------------[ cut here ]------------ [ 97.074500][ T8820] ODEBUG: free active (active state 0) object type: timer_list hint: rfcomm_dlc_timeout+0x0/0x90 [ 97.085369][ T8820] WARNING: CPU: 1 PID: 8820 at lib/debugobjects.c:481 debug_print_object+0x168/0x250 [ 97.095360][ T8820] Kernel panic - not syncing: panic_on_warn set ... [ 97.102585][ T8820] CPU: 1 PID: 8820 Comm: syz-executor036 Not tainted 5.4.0-rc3+ #0 [ 97.110472][ T8820] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 97.120519][ T8820] Call Trace: [ 97.123824][ T8820] dump_stack+0x172/0x1f0 [ 97.128147][ T8820] ? debug_print_object+0x120/0x250 [ 97.133380][ T8820] panic+0x2e3/0x75c [ 97.137296][ T8820] ? add_taint.cold+0x16/0x16 [ 97.141975][ T8820] ? __kasan_check_write+0x14/0x20 [ 97.147100][ T8820] ? __warn.cold+0x14/0x35 [ 97.151506][ T8820] ? __warn+0xd9/0x1d0 [ 97.155569][ T8820] ? debug_print_object+0x168/0x250 [ 97.160767][ T8820] __warn.cold+0x2f/0x35 [ 97.165000][ T8820] ? debug_print_object+0x168/0x250 [ 97.170642][ T8820] report_bug+0x289/0x300 [ 97.174968][ T8820] do_error_trap+0x11b/0x200 [ 97.179635][ T8820] do_invalid_op+0x37/0x50 [ 97.184038][ T8820] ? debug_print_object+0x168/0x250 [ 97.189245][ T8820] invalid_op+0x23/0x30 [ 97.193403][ T8820] RIP: 0010:debug_print_object+0x168/0x250 [ 97.199202][ T8820] Code: dd e0 f8 e6 87 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd e0 f8 e6 87 48 c7 c7 40 ee e6 87 e8 d0 2f fd fd <0f> 0b 83 05 83 b3 7f 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 [ 97.218796][ T8820] RSP: 0018:ffff888091b878d8 EFLAGS: 00010086 [ 97.224848][ T8820] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 97.232809][ T8820] RDX: 0000000000000000 RSI: ffffffff815cb796 RDI: ffffed1012370f0d [ 97.240878][ T8820] RBP: ffff888091b87918 R08: ffff8880a12c8140 R09: ffffed1015d24101 [ 97.248855][ T8820] R10: ffffed1015d24100 R11: ffff8880ae920807 R12: 0000000000000001 [ 97.256829][ T8820] R13: ffffffff88fb5580 R14: ffffffff81627380 R15: ffff8880a1748000 [ 97.264808][ T8820] ? calc_wheel_index+0x220/0x220 [ 97.269822][ T8820] ? vprintk_func+0x86/0x189 [ 97.274520][ T8820] ? debug_print_object+0x168/0x250 [ 97.279722][ T8820] debug_check_no_obj_freed+0x2d4/0x43f [ 97.285610][ T8820] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 97.291149][ T8820] kfree+0xf8/0x2c0 [ 97.295006][ T8820] rfcomm_dlc_free+0x20/0x30 [ 97.300384][ T8820] rfcomm_dev_ioctl+0x183e/0x1b80 [ 97.305426][ T8820] ? mark_held_locks+0xa4/0xf0 [ 97.310183][ T8820] ? __local_bh_enable_ip+0x15a/0x270 [ 97.315554][ T8820] ? lock_sock_nested+0xe2/0x120 [ 97.320569][ T8820] ? __local_bh_enable_ip+0x15a/0x270 [ 97.326036][ T8820] ? rfcomm_dev_state_change+0x150/0x150 [ 97.331685][ T8820] ? __local_bh_enable_ip+0x15a/0x270 [ 97.337064][ T8820] rfcomm_sock_ioctl+0x90/0xb0 [ 97.341901][ T8820] sock_do_ioctl+0xd8/0x2f0 [ 97.346403][ T8820] ? compat_ifr_data_ioctl+0x160/0x160 [ 97.351850][ T8820] ? tomoyo_path_number_perm+0x459/0x520 [ 97.357745][ T8820] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 97.364262][ T8820] ? tomoyo_path_number_perm+0x263/0x520 [ 97.369896][ T8820] sock_ioctl+0x3ed/0x790 [ 97.374221][ T8820] ? dlci_ioctl_set+0x40/0x40 [ 97.379246][ T8820] ? __fd_install+0x1bc/0x640 [ 97.383930][ T8820] ? dlci_ioctl_set+0x40/0x40 [ 97.388599][ T8820] do_vfs_ioctl+0xdb6/0x13e0 [ 97.393275][ T8820] ? ioctl_preallocate+0x210/0x210 [ 97.398375][ T8820] ? __kasan_check_read+0x11/0x20 [ 97.403399][ T8820] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.409718][ T8820] ? __fd_install+0x200/0x640 [ 97.414389][ T8820] ? tomoyo_file_ioctl+0x23/0x30 [ 97.419315][ T8820] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.425552][ T8820] ? security_file_ioctl+0x8d/0xc0 [ 97.430752][ T8820] ksys_ioctl+0xab/0xd0 [ 97.434907][ T8820] __x64_sys_ioctl+0x73/0xb0 [ 97.439485][ T8820] do_syscall_64+0xfa/0x760 [ 97.444000][ T8820] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 97.449881][ T8820] RIP: 0033:0x441229 [ 97.453774][ T8820] 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 [ 97.473363][ T8820] RSP: 002b:00007ffd39346678 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 97.482120][ T8820] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441229 [ 97.490080][ T8820] RDX: 0000000020000100 RSI: 00000000400452c8 RDI: 0000000000000004 [ 97.498035][ T8820] RBP: 0000000000017aea R08: 00000000004002c8 R09: 00000000004002c8 [ 97.506065][ T8820] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402050 [ 97.514031][ T8820] R13: 00000000004020e0 R14: 0000000000000000 R15: 0000000000000000 [ 97.523496][ T8820] Kernel Offset: disabled [ 97.527956][ T8820] Rebooting in 86400 seconds..