[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 68.471113][ T26] audit: type=1800 audit(1577517270.087:25): pid=9135 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 68.499748][ T26] audit: type=1800 audit(1577517270.097:26): pid=9135 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 68.545838][ T26] audit: type=1800 audit(1577517270.097:27): pid=9135 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[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.61' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 82.223689][ T9289] ------------[ cut here ]------------ [ 82.229526][ T9289] ODEBUG: free active (active state 0) object type: timer_list hint: rfcomm_dlc_timeout+0x0/0xe0 [ 82.240291][ T9289] WARNING: CPU: 0 PID: 9289 at lib/debugobjects.c:481 debug_print_object+0x168/0x250 [ 82.249748][ T9289] Kernel panic - not syncing: panic_on_warn set ... [ 82.256327][ T9289] CPU: 0 PID: 9289 Comm: syz-executor507 Not tainted 5.5.0-rc2-syzkaller #0 [ 82.264992][ T9289] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 82.275326][ T9289] Call Trace: [ 82.278640][ T9289] dump_stack+0x197/0x210 [ 82.282969][ T9289] ? debug_print_object+0xe0/0x250 [ 82.288073][ T9289] panic+0x2e3/0x75c [ 82.291968][ T9289] ? add_taint.cold+0x16/0x16 [ 82.296647][ T9289] ? __kasan_check_write+0x14/0x20 [ 82.301846][ T9289] ? __warn.cold+0x14/0x3e [ 82.306316][ T9289] ? __warn+0xd9/0x1cf [ 82.310375][ T9289] ? debug_print_object+0x168/0x250 [ 82.315560][ T9289] __warn.cold+0x2f/0x3e [ 82.319800][ T9289] ? debug_print_object+0x168/0x250 [ 82.324991][ T9289] report_bug+0x289/0x300 [ 82.329320][ T9289] do_error_trap+0x11b/0x200 [ 82.333901][ T9289] do_invalid_op+0x37/0x50 [ 82.339615][ T9289] ? debug_print_object+0x168/0x250 [ 82.344830][ T9289] invalid_op+0x23/0x30 [ 82.348970][ T9289] RIP: 0010:debug_print_object+0x168/0x250 [ 82.354761][ T9289] Code: dd 20 14 70 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd 20 14 70 88 48 c7 c7 80 09 70 88 e8 d7 8c b2 fd <0f> 0b 83 05 a3 84 e6 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 [ 82.374357][ T9289] RSP: 0018:ffffc90001d978b8 EFLAGS: 00010082 [ 82.380427][ T9289] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 82.388406][ T9289] RDX: 0000000000000000 RSI: ffffffff815e8b56 RDI: fffff520003b2f09 [ 82.396524][ T9289] RBP: ffffc90001d978f8 R08: ffff888093f2e300 R09: ffffed1015d045c9 [ 82.404498][ T9289] R10: ffffed1015d045c8 R11: ffff8880ae822e43 R12: 0000000000000001 [ 82.412615][ T9289] R13: ffffffff899afae0 R14: ffffffff81645b00 R15: ffff888215a045e8 [ 82.420599][ T9289] ? calc_wheel_index+0x220/0x220 [ 82.425612][ T9289] ? vprintk_func+0x86/0x189 [ 82.430207][ T9289] ? debug_print_object+0x168/0x250 [ 82.435395][ T9289] debug_check_no_obj_freed+0x2d4/0x43f [ 82.440925][ T9289] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 82.446604][ T9289] kfree+0xf8/0x2c0 [ 82.450401][ T9289] rfcomm_dlc_free+0x20/0x30 [ 82.454991][ T9289] rfcomm_dev_ioctl+0x1b9d/0x1e80 [ 82.460049][ T9289] ? mark_held_locks+0xa4/0xf0 [ 82.464808][ T9289] ? lock_sock_nested+0xe2/0x120 [ 82.469743][ T9289] ? rfcomm_tty_install+0x1e0/0x1e0 [ 82.474986][ T9289] ? lock_sock_nested+0x9a/0x120 [ 82.480035][ T9289] ? trace_hardirqs_on+0x67/0x240 [ 82.485058][ T9289] ? __local_bh_enable_ip+0x15a/0x270 [ 82.490421][ T9289] rfcomm_sock_ioctl+0x90/0xb0 [ 82.495450][ T9289] sock_do_ioctl+0xd8/0x2f0 [ 82.499952][ T9289] ? compat_ifr_data_ioctl+0x160/0x160 [ 82.505405][ T9289] ? tomoyo_path_number_perm+0x454/0x520 [ 82.511195][ T9289] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 82.517449][ T9289] ? tomoyo_path_number_perm+0x25e/0x520 [ 82.523095][ T9289] sock_ioctl+0x3ed/0x790 [ 82.527473][ T9289] ? dlci_ioctl_set+0x40/0x40 [ 82.532168][ T9289] ? __fd_install+0x1bc/0x640 [ 82.536928][ T9289] ? dlci_ioctl_set+0x40/0x40 [ 82.541693][ T9289] do_vfs_ioctl+0x977/0x14e0 [ 82.546284][ T9289] ? compat_ioctl_preallocate+0x220/0x220 [ 82.551992][ T9289] ? __kasan_check_read+0x11/0x20 [ 82.557027][ T9289] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 82.563257][ T9289] ? __fd_install+0x1fb/0x640 [ 82.568043][ T9289] ? tomoyo_file_ioctl+0x23/0x30 [ 82.572971][ T9289] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 82.579198][ T9289] ? security_file_ioctl+0x8d/0xc0 [ 82.584298][ T9289] ksys_ioctl+0xab/0xd0 [ 82.588553][ T9289] __x64_sys_ioctl+0x73/0xb0 [ 82.593203][ T9289] do_syscall_64+0xfa/0x790 [ 82.597711][ T9289] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 82.603588][ T9289] RIP: 0033:0x4412b9 [ 82.607466][ T9289] 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 [ 82.627355][ T9289] RSP: 002b:00007ffdceb06be8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 82.635759][ T9289] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 82.643770][ T9289] RDX: 0000000020000100 RSI: 00000000400452c8 RDI: 0000000000000004 [ 82.651734][ T9289] RBP: 00000000000140ef R08: 00000000004002c8 R09: 00000000004002c8 [ 82.659691][ T9289] R10: 00000000004002c8 R11: 0000000000000246 R12: 00000000004020e0 [ 82.667664][ T9289] R13: 0000000000402170 R14: 0000000000000000 R15: 0000000000000000 [ 82.677244][ T9289] Kernel Offset: disabled [ 82.681643][ T9289] Rebooting in 86400 seconds..