[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 64.007896][ T26] kauditd_printk_skb: 7 callbacks suppressed [ 64.007905][ T26] audit: type=1800 audit(1568155268.381:29): pid=9661 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 64.045713][ T26] audit: type=1800 audit(1568155268.381:30): pid=9661 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.15.198' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 87.641551][ T9814] ------------[ cut here ]------------ [ 87.647049][ T9814] ODEBUG: free active (active state 0) object type: timer_list hint: rfcomm_dlc_timeout+0x0/0x90 [ 87.657792][ T9814] WARNING: CPU: 0 PID: 9814 at lib/debugobjects.c:481 debug_print_object+0x168/0x250 [ 87.667217][ T9814] Kernel panic - not syncing: panic_on_warn set ... [ 87.673784][ T9814] CPU: 0 PID: 9814 Comm: syz-executor513 Not tainted 5.3.0-rc7+ #0 [ 87.681747][ T9814] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 87.691776][ T9814] Call Trace: [ 87.695049][ T9814] dump_stack+0x172/0x1f0 [ 87.700078][ T9814] ? debug_print_object+0x80/0x250 [ 87.705175][ T9814] panic+0x2dc/0x755 [ 87.709061][ T9814] ? add_taint.cold+0x16/0x16 [ 87.713715][ T9814] ? __kasan_check_write+0x14/0x20 [ 87.718802][ T9814] ? __warn.cold+0x5/0x4c [ 87.723102][ T9814] ? __warn+0xe7/0x1e0 [ 87.727161][ T9814] ? debug_print_object+0x168/0x250 [ 87.732678][ T9814] __warn.cold+0x20/0x4c [ 87.736898][ T9814] ? debug_print_object+0x168/0x250 [ 87.742082][ T9814] report_bug+0x263/0x2b0 [ 87.746389][ T9814] do_error_trap+0x11b/0x200 [ 87.750953][ T9814] do_invalid_op+0x37/0x50 [ 87.755345][ T9814] ? debug_print_object+0x168/0x250 [ 87.760519][ T9814] invalid_op+0x23/0x30 [ 87.764662][ T9814] RIP: 0010:debug_print_object+0x168/0x250 [ 87.770443][ T9814] Code: dd a0 37 c6 87 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd a0 37 c6 87 48 c7 c7 a0 2c c6 87 e8 e0 c2 05 fe <0f> 0b 83 05 23 74 67 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 [ 87.790020][ T9814] RSP: 0018:ffff88809446f8d8 EFLAGS: 00010086 [ 87.796081][ T9814] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 87.804045][ T9814] RDX: 0000000000000000 RSI: ffffffff815c26f6 RDI: ffffed101288df0d [ 87.812004][ T9814] RBP: ffff88809446f918 R08: ffff8880985aa440 R09: ffffed1015d04101 [ 87.820066][ T9814] R10: ffffed1015d04100 R11: ffff8880ae820807 R12: 0000000000000001 [ 87.828026][ T9814] R13: ffffffff88db67a0 R14: ffffffff8161c5f0 R15: ffff888094ca0ea8 [ 87.835989][ T9814] ? calc_wheel_index+0x220/0x220 [ 87.840992][ T9814] ? vprintk_func+0x86/0x189 [ 87.845570][ T9814] ? debug_print_object+0x168/0x250 [ 87.850792][ T9814] debug_check_no_obj_freed+0x2d4/0x43f [ 87.856318][ T9814] ? __kasan_check_read+0x11/0x20 [ 87.861388][ T9814] kfree+0xf8/0x2c0 [ 87.865190][ T9814] rfcomm_dlc_free+0x20/0x30 [ 87.869761][ T9814] rfcomm_dev_ioctl+0x183e/0x1b80 [ 87.874834][ T9814] ? rfcomm_dev_state_change+0x150/0x150 [ 87.880577][ T9814] ? __local_bh_enable_ip+0x15a/0x270 [ 87.885926][ T9814] rfcomm_sock_ioctl+0x90/0xb0 [ 87.890666][ T9814] sock_do_ioctl+0xd8/0x2f0 [ 87.895147][ T9814] ? compat_ifr_data_ioctl+0x160/0x160 [ 87.900590][ T9814] ? trace_hardirqs_on+0x67/0x240 [ 87.905594][ T9814] ? tomoyo_path_number_perm+0x459/0x520 [ 87.911311][ T9814] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 87.917528][ T9814] ? tomoyo_path_number_perm+0x263/0x520 [ 87.923137][ T9814] sock_ioctl+0x3ed/0x780 [ 87.927444][ T9814] ? dlci_ioctl_set+0x40/0x40 [ 87.932124][ T9814] ? dlci_ioctl_set+0x40/0x40 [ 87.936777][ T9814] do_vfs_ioctl+0xdb6/0x13e0 [ 87.941343][ T9814] ? ioctl_preallocate+0x210/0x210 [ 87.946433][ T9814] ? __kasan_check_write+0x14/0x20 [ 87.951520][ T9814] ? up_read+0x159/0x570 [ 87.955739][ T9814] ? tomoyo_file_ioctl+0x23/0x30 [ 87.960664][ T9814] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 87.966878][ T9814] ? security_file_ioctl+0x8d/0xc0 [ 87.971993][ T9814] ksys_ioctl+0xab/0xd0 [ 87.976135][ T9814] __x64_sys_ioctl+0x73/0xb0 [ 87.980702][ T9814] do_syscall_64+0xfd/0x6a0 [ 87.985216][ T9814] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 87.991082][ T9814] RIP: 0033:0x441229 [ 87.994953][ T9814] 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 [ 88.014553][ T9814] RSP: 002b:00007ffcc9e6bc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 88.022941][ T9814] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441229 [ 88.030899][ T9814] RDX: 0000000020000100 RSI: 00000000400452c8 RDI: 0000000000000003 [ 88.038853][ T9814] RBP: 000000000001562c R08: 00000000004002c8 R09: 00000000004002c8 [ 88.046835][ T9814] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402050 [ 88.054797][ T9814] R13: 00000000004020e0 R14: 0000000000000000 R15: 0000000000000000 [ 88.064118][ T9814] Kernel Offset: disabled [ 88.068441][ T9814] Rebooting in 86400 seconds..