[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 75.940487][ T26] audit: type=1800 audit(1577513796.926:25): pid=9153 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 75.975796][ T26] audit: type=1800 audit(1577513796.926:26): pid=9153 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 76.018345][ T26] audit: type=1800 audit(1577513796.926:27): pid=9153 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 '10.128.0.31' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 93.520972][ T9307] ------------[ cut here ]------------ [ 93.526579][ T9307] ODEBUG: free active (active state 0) object type: timer_list hint: rfcomm_dlc_timeout+0x0/0xe0 [ 93.537302][ T9307] WARNING: CPU: 0 PID: 9307 at lib/debugobjects.c:481 debug_print_object+0x168/0x250 [ 93.546740][ T9307] Kernel panic - not syncing: panic_on_warn set ... [ 93.553320][ T9307] CPU: 0 PID: 9307 Comm: syz-executor645 Not tainted 5.5.0-rc2-syzkaller #0 [ 93.561976][ T9307] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 93.572011][ T9307] Call Trace: [ 93.575288][ T9307] dump_stack+0x197/0x210 [ 93.579601][ T9307] ? debug_print_object+0xa0/0x250 [ 93.584696][ T9307] panic+0x2e3/0x75c [ 93.588582][ T9307] ? add_taint.cold+0x16/0x16 [ 93.593251][ T9307] ? __kasan_check_write+0x14/0x20 [ 93.598341][ T9307] ? __warn.cold+0x14/0x3e [ 93.604037][ T9307] ? __warn+0xd9/0x1cf [ 93.608086][ T9307] ? debug_print_object+0x168/0x250 [ 93.613269][ T9307] __warn.cold+0x2f/0x3e [ 93.617495][ T9307] ? debug_print_object+0x168/0x250 [ 93.622692][ T9307] report_bug+0x289/0x300 [ 93.627003][ T9307] do_error_trap+0x11b/0x200 [ 93.632878][ T9307] do_invalid_op+0x37/0x50 [ 93.637274][ T9307] ? debug_print_object+0x168/0x250 [ 93.642454][ T9307] invalid_op+0x23/0x30 [ 93.646592][ T9307] RIP: 0010:debug_print_object+0x168/0x250 [ 93.652390][ T9307] Code: dd 60 14 70 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd 60 14 70 88 48 c7 c7 c0 09 70 88 e8 97 8b b2 fd <0f> 0b 83 05 63 b4 e6 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 [ 93.671982][ T9307] RSP: 0018:ffffc90001e078b8 EFLAGS: 00010082 [ 93.678028][ T9307] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 93.685978][ T9307] RDX: 0000000000000000 RSI: ffffffff815e8b56 RDI: fffff520003c0f09 [ 93.694029][ T9307] RBP: ffffc90001e078f8 R08: ffff88809299a3c0 R09: ffffed1015d045c9 [ 93.701979][ T9307] R10: ffffed1015d045c8 R11: ffff8880ae822e43 R12: 0000000000000001 [ 93.710027][ T9307] R13: ffffffff899afae0 R14: ffffffff81645b00 R15: ffff8880a0056c78 [ 93.718118][ T9307] ? calc_wheel_index+0x220/0x220 [ 93.723233][ T9307] ? vprintk_func+0x86/0x189 [ 93.727813][ T9307] ? debug_print_object+0x168/0x250 [ 93.733017][ T9307] debug_check_no_obj_freed+0x2d4/0x43f [ 93.738563][ T9307] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 93.744095][ T9307] kfree+0xf8/0x2c0 [ 93.747946][ T9307] rfcomm_dlc_free+0x20/0x30 [ 93.752555][ T9307] rfcomm_dev_ioctl+0x1b9d/0x1e80 [ 93.757577][ T9307] ? mark_held_locks+0xa4/0xf0 [ 93.762337][ T9307] ? lock_sock_nested+0xe2/0x120 [ 93.767276][ T9307] ? rfcomm_tty_install+0x1e0/0x1e0 [ 93.772471][ T9307] ? lock_sock_nested+0x9a/0x120 [ 93.777789][ T9307] ? trace_hardirqs_on+0x67/0x240 [ 93.782807][ T9307] ? __local_bh_enable_ip+0x15a/0x270 [ 93.789151][ T9307] rfcomm_sock_ioctl+0x90/0xb0 [ 93.793915][ T9307] sock_do_ioctl+0xd8/0x2f0 [ 93.798414][ T9307] ? compat_ifr_data_ioctl+0x160/0x160 [ 93.803884][ T9307] ? tomoyo_path_number_perm+0x454/0x520 [ 93.809512][ T9307] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 93.815755][ T9307] ? tomoyo_path_number_perm+0x25e/0x520 [ 93.821387][ T9307] sock_ioctl+0x3ed/0x790 [ 93.825723][ T9307] ? dlci_ioctl_set+0x40/0x40 [ 93.830410][ T9307] ? __fd_install+0x1bc/0x640 [ 93.835079][ T9307] ? dlci_ioctl_set+0x40/0x40 [ 93.839824][ T9307] do_vfs_ioctl+0x977/0x14e0 [ 93.844417][ T9307] ? compat_ioctl_preallocate+0x220/0x220 [ 93.850134][ T9307] ? __kasan_check_read+0x11/0x20 [ 93.855855][ T9307] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 93.862441][ T9307] ? __fd_install+0x1fb/0x640 [ 93.867113][ T9307] ? tomoyo_file_ioctl+0x23/0x30 [ 93.872075][ T9307] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 93.878306][ T9307] ? security_file_ioctl+0x8d/0xc0 [ 93.883408][ T9307] ksys_ioctl+0xab/0xd0 [ 93.887571][ T9307] __x64_sys_ioctl+0x73/0xb0 [ 93.892201][ T9307] do_syscall_64+0xfa/0x790 [ 93.896742][ T9307] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 93.902629][ T9307] RIP: 0033:0x4412b9 [ 93.906579][ T9307] 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 [ 93.926171][ T9307] RSP: 002b:00007fff6809b878 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 93.934569][ T9307] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 93.942525][ T9307] RDX: 0000000020000100 RSI: 00000000400452c8 RDI: 0000000000000004 [ 93.950568][ T9307] RBP: 0000000000016d1f R08: 00000000004002c8 R09: 00000000004002c8 [ 93.958535][ T9307] R10: 00000000004002c8 R11: 0000000000000246 R12: 00000000004020e0 [ 93.966546][ T9307] R13: 0000000000402170 R14: 0000000000000000 R15: 0000000000000000 [ 93.975862][ T9307] Kernel Offset: disabled [ 93.980262][ T9307] Rebooting in 86400 seconds..