[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 83.435541][ T27] audit: type=1800 audit(1578536633.446:25): pid=9465 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 83.462255][ T27] audit: type=1800 audit(1578536633.456:26): pid=9465 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 83.506504][ T27] audit: type=1800 audit(1578536633.456:27): pid=9465 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 '10.128.0.30' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 99.908620][ T9623] ------------[ cut here ]------------ [ 99.914254][ T9623] ODEBUG: free active (active state 0) object type: timer_list hint: rfcomm_dlc_timeout+0x0/0xe0 [ 99.925024][ T9623] WARNING: CPU: 0 PID: 9623 at lib/debugobjects.c:481 debug_print_object+0x168/0x250 [ 99.934467][ T9623] Kernel panic - not syncing: panic_on_warn set ... [ 99.941175][ T9623] CPU: 0 PID: 9623 Comm: syz-executor657 Not tainted 5.5.0-rc4-syzkaller #0 [ 99.949856][ T9623] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 99.959943][ T9623] Call Trace: [ 99.963249][ T9623] dump_stack+0x197/0x210 [ 99.967582][ T9623] ? debug_print_object+0x150/0x250 [ 99.972853][ T9623] panic+0x2e3/0x75c [ 99.976734][ T9623] ? add_taint.cold+0x16/0x16 [ 99.981419][ T9623] ? __kasan_check_write+0x14/0x20 [ 99.986619][ T9623] ? __warn.cold+0x14/0x3e [ 99.991021][ T9623] ? __warn+0xd9/0x1cf [ 99.995092][ T9623] ? debug_print_object+0x168/0x250 [ 100.000274][ T9623] __warn.cold+0x2f/0x3e [ 100.004504][ T9623] ? debug_print_object+0x168/0x250 [ 100.009691][ T9623] report_bug+0x289/0x300 [ 100.014009][ T9623] do_error_trap+0x11b/0x200 [ 100.018589][ T9623] do_invalid_op+0x37/0x50 [ 100.023053][ T9623] ? debug_print_object+0x168/0x250 [ 100.028255][ T9623] invalid_op+0x23/0x30 [ 100.032535][ T9623] RIP: 0010:debug_print_object+0x168/0x250 [ 100.038338][ T9623] Code: dd 80 88 71 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd 80 88 71 88 48 c7 c7 e0 7d 71 88 e8 f7 28 a6 fd <0f> 0b 83 05 b3 59 dc 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 [ 100.057933][ T9623] RSP: 0018:ffffc90001e978b8 EFLAGS: 00010082 [ 100.063998][ T9623] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 100.072044][ T9623] RDX: 0000000000000000 RSI: ffffffff815e8fc6 RDI: fffff520003d2f09 [ 100.080145][ T9623] RBP: ffffc90001e978f8 R08: ffff8880a3940040 R09: ffffed1015d045c9 [ 100.088242][ T9623] R10: ffffed1015d045c8 R11: ffff8880ae822e43 R12: 0000000000000001 [ 100.096207][ T9623] R13: ffffffff899af740 R14: ffffffff81645f70 R15: ffff88809f57b310 [ 100.104177][ T9623] ? calc_wheel_index+0x220/0x220 [ 100.109304][ T9623] ? vprintk_func+0x86/0x189 [ 100.114514][ T9623] ? debug_print_object+0x168/0x250 [ 100.119708][ T9623] debug_check_no_obj_freed+0x2d4/0x43f [ 100.125255][ T9623] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 100.130794][ T9623] kfree+0xf8/0x2c0 [ 100.134588][ T9623] rfcomm_dlc_free+0x20/0x30 [ 100.139163][ T9623] rfcomm_dev_ioctl+0x1b9d/0x1e80 [ 100.144177][ T9623] ? mark_held_locks+0xa4/0xf0 [ 100.148940][ T9623] ? lock_sock_nested+0xe2/0x120 [ 100.153880][ T9623] ? rfcomm_tty_install+0x1e0/0x1e0 [ 100.159086][ T9623] ? lock_sock_nested+0x9a/0x120 [ 100.164016][ T9623] ? trace_hardirqs_on+0x67/0x240 [ 100.169062][ T9623] ? __local_bh_enable_ip+0x15a/0x270 [ 100.175050][ T9623] rfcomm_sock_ioctl+0x90/0xb0 [ 100.179826][ T9623] sock_do_ioctl+0xd8/0x2f0 [ 100.184338][ T9623] ? compat_ifr_data_ioctl+0x160/0x160 [ 100.189817][ T9623] ? tomoyo_path_number_perm+0x454/0x520 [ 100.195462][ T9623] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 100.201702][ T9623] ? tomoyo_path_number_perm+0x25e/0x520 [ 100.207325][ T9623] sock_ioctl+0x3ed/0x790 [ 100.211654][ T9623] ? dlci_ioctl_set+0x40/0x40 [ 100.216332][ T9623] ? __fd_install+0x1bc/0x640 [ 100.221005][ T9623] ? dlci_ioctl_set+0x40/0x40 [ 100.225669][ T9623] do_vfs_ioctl+0x977/0x14e0 [ 100.230254][ T9623] ? compat_ioctl_preallocate+0x220/0x220 [ 100.236080][ T9623] ? __kasan_check_read+0x11/0x20 [ 100.241100][ T9623] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 100.247326][ T9623] ? __fd_install+0x1fb/0x640 [ 100.251995][ T9623] ? tomoyo_file_ioctl+0x23/0x30 [ 100.256940][ T9623] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 100.263169][ T9623] ? security_file_ioctl+0x8d/0xc0 [ 100.268265][ T9623] ksys_ioctl+0xab/0xd0 [ 100.272436][ T9623] __x64_sys_ioctl+0x73/0xb0 [ 100.277026][ T9623] do_syscall_64+0xfa/0x790 [ 100.281542][ T9623] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 100.287574][ T9623] RIP: 0033:0x4412b9 [ 100.291461][ T9623] 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 [ 100.311313][ T9623] RSP: 002b:00007fff05cae178 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 100.319723][ T9623] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 100.327682][ T9623] RDX: 0000000020000100 RSI: 00000000400452c8 RDI: 0000000000000004 [ 100.335764][ T9623] RBP: 0000000000018625 R08: 00000000004002c8 R09: 00000000004002c8 [ 100.343739][ T9623] R10: 00000000004002c8 R11: 0000000000000246 R12: 00000000004020e0 [ 100.351707][ T9623] R13: 0000000000402170 R14: 0000000000000000 R15: 0000000000000000 [ 100.361342][ T9623] Kernel Offset: disabled [ 100.365751][ T9623] Rebooting in 86400 seconds..