[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 58.855615][ T26] audit: type=1800 audit(1572362617.665:25): pid=8722 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 58.901340][ T26] audit: type=1800 audit(1572362617.665:26): pid=8722 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 58.940356][ T26] audit: type=1800 audit(1572362617.665:27): pid=8722 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 '10.128.0.45' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 74.485403][ T8876] ------------[ cut here ]------------ [ 74.491767][ T8876] ODEBUG: free active (active state 0) object type: timer_list hint: rfcomm_dlc_timeout+0x0/0x90 [ 74.503897][ T8876] WARNING: CPU: 0 PID: 8876 at lib/debugobjects.c:481 debug_print_object+0x168/0x250 [ 74.514040][ T8876] Kernel panic - not syncing: panic_on_warn set ... [ 74.521843][ T8876] CPU: 0 PID: 8876 Comm: syz-executor730 Not tainted 5.4.0-rc3+ #0 [ 74.530392][ T8876] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.542194][ T8876] Call Trace: [ 74.545640][ T8876] dump_stack+0x172/0x1f0 [ 74.551056][ T8876] ? debug_print_object+0xc0/0x250 [ 74.556527][ T8876] panic+0x2e3/0x75c [ 74.560437][ T8876] ? add_taint.cold+0x16/0x16 [ 74.565341][ T8876] ? __kasan_check_write+0x14/0x20 [ 74.571055][ T8876] ? __warn.cold+0x14/0x35 [ 74.576656][ T8876] ? __warn+0xd9/0x1d0 [ 74.580944][ T8876] ? debug_print_object+0x168/0x250 [ 74.586856][ T8876] __warn.cold+0x2f/0x35 [ 74.592005][ T8876] ? debug_print_object+0x168/0x250 [ 74.598876][ T8876] report_bug+0x289/0x300 [ 74.603693][ T8876] do_error_trap+0x11b/0x200 [ 74.609262][ T8876] do_invalid_op+0x37/0x50 [ 74.615071][ T8876] ? debug_print_object+0x168/0x250 [ 74.621524][ T8876] invalid_op+0x23/0x30 [ 74.625853][ T8876] RIP: 0010:debug_print_object+0x168/0x250 [ 74.632240][ T8876] Code: dd 20 f8 e6 87 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd 20 f8 e6 87 48 c7 c7 80 ed e6 87 e8 20 31 fd fd <0f> 0b 83 05 e3 55 7f 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 [ 74.653868][ T8876] RSP: 0018:ffff888098d4f8d8 EFLAGS: 00010086 [ 74.660858][ T8876] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 74.669683][ T8876] RDX: 0000000000000000 RSI: ffffffff815cb646 RDI: ffffed10131a9f0d [ 74.678593][ T8876] RBP: ffff888098d4f918 R08: ffff8880a0cdc640 R09: ffffed1015d04101 [ 74.687102][ T8876] R10: ffffed1015d04100 R11: ffff8880ae820807 R12: 0000000000000001 [ 74.695514][ T8876] R13: ffffffff88fb5540 R14: ffffffff81627230 R15: ffff88809ccf6658 [ 74.704548][ T8876] ? calc_wheel_index+0x220/0x220 [ 74.710194][ T8876] ? vprintk_func+0x86/0x189 [ 74.715969][ T8876] ? debug_print_object+0x168/0x250 [ 74.721846][ T8876] debug_check_no_obj_freed+0x2d4/0x43f [ 74.727461][ T8876] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 74.733450][ T8876] kfree+0xf8/0x2c0 [ 74.737870][ T8876] rfcomm_dlc_free+0x20/0x30 [ 74.742609][ T8876] rfcomm_dev_ioctl+0x183e/0x1b80 [ 74.747905][ T8876] ? mark_held_locks+0xa4/0xf0 [ 74.752717][ T8876] ? __local_bh_enable_ip+0x15a/0x270 [ 74.758644][ T8876] ? lock_sock_nested+0xe2/0x120 [ 74.764387][ T8876] ? __local_bh_enable_ip+0x15a/0x270 [ 74.770513][ T8876] ? rfcomm_dev_state_change+0x150/0x150 [ 74.776413][ T8876] ? __local_bh_enable_ip+0x15a/0x270 [ 74.782177][ T8876] rfcomm_sock_ioctl+0x90/0xb0 [ 74.787191][ T8876] sock_do_ioctl+0xd8/0x2f0 [ 74.792476][ T8876] ? compat_ifr_data_ioctl+0x160/0x160 [ 74.799217][ T8876] ? tomoyo_path_number_perm+0x459/0x520 [ 74.805064][ T8876] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 74.813704][ T8876] ? tomoyo_path_number_perm+0x263/0x520 [ 74.819501][ T8876] sock_ioctl+0x3ed/0x790 [ 74.823923][ T8876] ? dlci_ioctl_set+0x40/0x40 [ 74.830392][ T8876] ? __fd_install+0x1bc/0x640 [ 74.835811][ T8876] ? dlci_ioctl_set+0x40/0x40 [ 74.840988][ T8876] do_vfs_ioctl+0xdb6/0x13e0 [ 74.846246][ T8876] ? ioctl_preallocate+0x210/0x210 [ 74.851750][ T8876] ? __kasan_check_read+0x11/0x20 [ 74.857268][ T8876] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 74.864522][ T8876] ? __fd_install+0x200/0x640 [ 74.869426][ T8876] ? tomoyo_file_ioctl+0x23/0x30 [ 74.874546][ T8876] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 74.881452][ T8876] ? security_file_ioctl+0x8d/0xc0 [ 74.886689][ T8876] ksys_ioctl+0xab/0xd0 [ 74.891524][ T8876] __x64_sys_ioctl+0x73/0xb0 [ 74.896258][ T8876] do_syscall_64+0xfa/0x760 [ 74.901756][ T8876] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 74.909002][ T8876] RIP: 0033:0x441229 [ 74.913450][ T8876] 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 [ 74.937876][ T8876] RSP: 002b:00007fff157c9b38 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 74.951735][ T8876] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441229 [ 74.960476][ T8876] RDX: 0000000020000100 RSI: 00000000400452c8 RDI: 0000000000000004 [ 74.970526][ T8876] RBP: 00000000000122ca R08: 00000000004002c8 R09: 00000000004002c8 [ 74.980143][ T8876] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402050 [ 74.989035][ T8876] R13: 00000000004020e0 R14: 0000000000000000 R15: 0000000000000000 [ 75.000345][ T8876] Kernel Offset: disabled [ 75.005265][ T8876] Rebooting in 86400 seconds..