[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 59.489374][ T26] audit: type=1800 audit(1572353484.492:25): pid=8732 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 59.535516][ T26] audit: type=1800 audit(1572353484.492:26): pid=8732 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 59.565553][ T26] audit: type=1800 audit(1572353484.492:27): pid=8732 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 '10.128.0.50' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 74.773650][ T8887] ------------[ cut here ]------------ [ 74.779302][ T8887] ODEBUG: free active (active state 0) object type: timer_list hint: rfcomm_dlc_timeout+0x0/0x90 [ 74.790040][ T8887] WARNING: CPU: 1 PID: 8887 at lib/debugobjects.c:481 debug_print_object+0x168/0x250 [ 74.799515][ T8887] Kernel panic - not syncing: panic_on_warn set ... [ 74.806092][ T8887] CPU: 1 PID: 8887 Comm: syz-executor917 Not tainted 5.4.0-rc5+ #0 [ 74.813966][ T8887] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.824017][ T8887] Call Trace: [ 74.827314][ T8887] dump_stack+0x172/0x1f0 [ 74.831645][ T8887] ? debug_print_object+0x140/0x250 [ 74.836838][ T8887] panic+0x2e3/0x75c [ 74.840757][ T8887] ? add_taint.cold+0x16/0x16 [ 74.845452][ T8887] ? __kasan_check_write+0x14/0x20 [ 74.850561][ T8887] ? __warn.cold+0x14/0x35 [ 74.854983][ T8887] ? __warn+0xd9/0x1d0 [ 74.859050][ T8887] ? debug_print_object+0x168/0x250 [ 74.864235][ T8887] __warn.cold+0x2f/0x35 [ 74.868502][ T8887] ? debug_print_object+0x168/0x250 [ 74.873728][ T8887] report_bug+0x289/0x300 [ 74.878078][ T8887] do_error_trap+0x11b/0x200 [ 74.882663][ T8887] do_invalid_op+0x37/0x50 [ 74.887087][ T8887] ? debug_print_object+0x168/0x250 [ 74.892289][ T8887] invalid_op+0x23/0x30 [ 74.896443][ T8887] RIP: 0010:debug_print_object+0x168/0x250 [ 74.902242][ T8887] Code: dd 60 fa e6 87 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd 60 fa e6 87 48 c7 c7 c0 ef e6 87 e8 a0 27 fd fd <0f> 0b 83 05 23 7b 7f 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 [ 74.921836][ T8887] RSP: 0018:ffff888096b378d8 EFLAGS: 00010086 [ 74.927902][ T8887] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 74.935863][ T8887] RDX: 0000000000000000 RSI: ffffffff815cc2b6 RDI: ffffed1012d66f0d [ 74.943838][ T8887] RBP: ffff888096b37918 R08: ffff8880955d83c0 R09: ffffed1015d24101 [ 74.951809][ T8887] R10: ffffed1015d24100 R11: ffff8880ae920807 R12: 0000000000000001 [ 74.959767][ T8887] R13: ffffffff88fb5880 R14: ffffffff81627ea0 R15: ffff8880aa41d540 [ 74.967847][ T8887] ? calc_wheel_index+0x220/0x220 [ 74.973060][ T8887] ? vprintk_func+0x86/0x189 [ 74.977654][ T8887] ? debug_print_object+0x168/0x250 [ 74.982854][ T8887] debug_check_no_obj_freed+0x2d4/0x43f [ 74.988596][ T8887] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 74.994200][ T8887] kfree+0xf8/0x2c0 [ 74.998005][ T8887] rfcomm_dlc_free+0x20/0x30 [ 75.002604][ T8887] rfcomm_dev_ioctl+0x183e/0x1b80 [ 75.007623][ T8887] ? mark_held_locks+0xa4/0xf0 [ 75.012389][ T8887] ? __local_bh_enable_ip+0x15a/0x270 [ 75.020009][ T8887] ? lock_sock_nested+0xe2/0x120 [ 75.024941][ T8887] ? __local_bh_enable_ip+0x15a/0x270 [ 75.030309][ T8887] ? rfcomm_dev_state_change+0x150/0x150 [ 75.035942][ T8887] ? __local_bh_enable_ip+0x15a/0x270 [ 75.041378][ T8887] rfcomm_sock_ioctl+0x90/0xb0 [ 75.046147][ T8887] sock_do_ioctl+0xd8/0x2f0 [ 75.050639][ T8887] ? compat_ifr_data_ioctl+0x160/0x160 [ 75.056093][ T8887] ? tomoyo_path_number_perm+0x459/0x520 [ 75.061720][ T8887] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 75.067951][ T8887] ? tomoyo_path_number_perm+0x263/0x520 [ 75.073592][ T8887] sock_ioctl+0x3ed/0x790 [ 75.077914][ T8887] ? dlci_ioctl_set+0x40/0x40 [ 75.083459][ T8887] ? __fd_install+0x1bc/0x640 [ 75.088131][ T8887] ? dlci_ioctl_set+0x40/0x40 [ 75.092809][ T8887] do_vfs_ioctl+0xdb6/0x13e0 [ 75.097407][ T8887] ? ioctl_preallocate+0x210/0x210 [ 75.102801][ T8887] ? __kasan_check_read+0x11/0x20 [ 75.107822][ T8887] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 75.114050][ T8887] ? __fd_install+0x200/0x640 [ 75.118742][ T8887] ? tomoyo_file_ioctl+0x23/0x30 [ 75.123673][ T8887] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 75.129908][ T8887] ? security_file_ioctl+0x8d/0xc0 [ 75.135045][ T8887] ksys_ioctl+0xab/0xd0 [ 75.139215][ T8887] __x64_sys_ioctl+0x73/0xb0 [ 75.143875][ T8887] do_syscall_64+0xfa/0x760 [ 75.148377][ T8887] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 75.154449][ T8887] RIP: 0033:0x441229 [ 75.158333][ T8887] 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 [ 75.177926][ T8887] RSP: 002b:00007ffd594f6c18 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 75.186331][ T8887] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441229 [ 75.194289][ T8887] RDX: 0000000020000100 RSI: 00000000400452c8 RDI: 0000000000000004 [ 75.202248][ T8887] RBP: 00000000000123e5 R08: 00000000004002c8 R09: 00000000004002c8 [ 75.210310][ T8887] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402050 [ 75.218274][ T8887] R13: 00000000004020e0 R14: 0000000000000000 R15: 0000000000000000 [ 75.228237][ T8887] Kernel Offset: disabled [ 75.232635][ T8887] Rebooting in 86400 seconds..