[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 62.972917][ T26] audit: type=1800 audit(1572023163.557:25): pid=8464 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 63.012018][ T26] audit: type=1800 audit(1572023163.557:26): pid=8464 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 63.047248][ T26] audit: type=1800 audit(1572023163.557:27): pid=8464 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 '10.128.0.160' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 80.698030][ T8617] ------------[ cut here ]------------ [ 80.703878][ T8617] ODEBUG: free active (active state 0) object type: timer_list hint: rfcomm_dlc_timeout+0x0/0x90 [ 80.714960][ T8617] WARNING: CPU: 1 PID: 8617 at lib/debugobjects.c:481 debug_print_object+0x168/0x250 [ 80.724496][ T8617] Kernel panic - not syncing: panic_on_warn set ... [ 80.731079][ T8617] CPU: 1 PID: 8617 Comm: syz-executor704 Not tainted 5.4.0-rc3+ #0 [ 80.738960][ T8617] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 80.748991][ T8617] Call Trace: [ 80.752278][ T8617] dump_stack+0x172/0x1f0 [ 80.756590][ T8617] ? debug_print_object+0x160/0x250 [ 80.761764][ T8617] panic+0x2e3/0x75c [ 80.765647][ T8617] ? add_taint.cold+0x16/0x16 [ 80.770313][ T8617] ? __kasan_check_write+0x14/0x20 [ 80.775411][ T8617] ? __warn.cold+0x14/0x35 [ 80.779840][ T8617] ? __warn+0xd9/0x1d0 [ 80.783891][ T8617] ? debug_print_object+0x168/0x250 [ 80.789088][ T8617] __warn.cold+0x2f/0x35 [ 80.793464][ T8617] ? debug_print_object+0x168/0x250 [ 80.798756][ T8617] report_bug+0x289/0x300 [ 80.803084][ T8617] do_error_trap+0x11b/0x200 [ 80.807658][ T8617] do_invalid_op+0x37/0x50 [ 80.813472][ T8617] ? debug_print_object+0x168/0x250 [ 80.818712][ T8617] invalid_op+0x23/0x30 [ 80.822942][ T8617] RIP: 0010:debug_print_object+0x168/0x250 [ 80.829703][ T8617] 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 c0 33 fd fd <0f> 0b 83 05 c3 58 7f 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 [ 80.849749][ T8617] RSP: 0018:ffff888098eaf8d8 EFLAGS: 00010086 [ 80.855898][ T8617] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 80.863847][ T8617] RDX: 0000000000000000 RSI: ffffffff815cb646 RDI: ffffed10131d5f0d [ 80.871797][ T8617] RBP: ffff888098eaf918 R08: ffff88809cc1c080 R09: ffffed1015d24101 [ 80.879834][ T8617] R10: ffffed1015d24100 R11: ffff8880ae920807 R12: 0000000000000001 [ 80.887883][ T8617] R13: ffffffff88fb5540 R14: ffffffff81627230 R15: ffff88808bbd2230 [ 80.895852][ T8617] ? calc_wheel_index+0x220/0x220 [ 80.900864][ T8617] ? vprintk_func+0x86/0x189 [ 80.905444][ T8617] ? debug_print_object+0x168/0x250 [ 80.910645][ T8617] debug_check_no_obj_freed+0x2d4/0x43f [ 80.916211][ T8617] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 80.921752][ T8617] kfree+0xf8/0x2c0 [ 80.925547][ T8617] rfcomm_dlc_free+0x20/0x30 [ 80.930118][ T8617] rfcomm_dev_ioctl+0x183e/0x1b80 [ 80.935139][ T8617] ? mark_held_locks+0xa4/0xf0 [ 80.939985][ T8617] ? __local_bh_enable_ip+0x15a/0x270 [ 80.945358][ T8617] ? lock_sock_nested+0xe2/0x120 [ 80.950276][ T8617] ? __local_bh_enable_ip+0x15a/0x270 [ 80.955648][ T8617] ? rfcomm_dev_state_change+0x150/0x150 [ 80.961277][ T8617] ? __local_bh_enable_ip+0x15a/0x270 [ 80.966635][ T8617] rfcomm_sock_ioctl+0x90/0xb0 [ 80.971405][ T8617] sock_do_ioctl+0xd8/0x2f0 [ 80.975894][ T8617] ? compat_ifr_data_ioctl+0x160/0x160 [ 80.981343][ T8617] ? tomoyo_path_number_perm+0x459/0x520 [ 80.986964][ T8617] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 80.993183][ T8617] ? tomoyo_path_number_perm+0x263/0x520 [ 80.998812][ T8617] sock_ioctl+0x3ed/0x790 [ 81.003120][ T8617] ? dlci_ioctl_set+0x40/0x40 [ 81.007812][ T8617] ? __fd_install+0x1bc/0x640 [ 81.012483][ T8617] ? dlci_ioctl_set+0x40/0x40 [ 81.017154][ T8617] do_vfs_ioctl+0xdb6/0x13e0 [ 81.021745][ T8617] ? ioctl_preallocate+0x210/0x210 [ 81.026845][ T8617] ? __kasan_check_read+0x11/0x20 [ 81.031855][ T8617] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 81.038080][ T8617] ? __fd_install+0x200/0x640 [ 81.042746][ T8617] ? tomoyo_file_ioctl+0x23/0x30 [ 81.047676][ T8617] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 81.053904][ T8617] ? security_file_ioctl+0x8d/0xc0 [ 81.059013][ T8617] ksys_ioctl+0xab/0xd0 [ 81.063164][ T8617] __x64_sys_ioctl+0x73/0xb0 [ 81.067751][ T8617] do_syscall_64+0xfa/0x760 [ 81.072328][ T8617] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 81.078197][ T8617] RIP: 0033:0x441229 [ 81.082083][ T8617] 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 [ 81.101671][ T8617] RSP: 002b:00007ffc22ac88a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 81.110881][ T8617] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441229 [ 81.118832][ T8617] RDX: 0000000020000100 RSI: 00000000400452c8 RDI: 0000000000000004 [ 81.127842][ T8617] RBP: 0000000000013b16 R08: 00000000004002c8 R09: 00000000004002c8 [ 81.135975][ T8617] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402050 [ 81.143933][ T8617] R13: 00000000004020e0 R14: 0000000000000000 R15: 0000000000000000 [ 81.153500][ T8617] Kernel Offset: disabled [ 81.157881][ T8617] Rebooting in 86400 seconds..