[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 89.086765][ T27] audit: type=1800 audit(1578273617.469:25): pid=9267 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 89.122816][ T27] audit: type=1800 audit(1578273617.469:26): pid=9267 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 89.143487][ T27] audit: type=1800 audit(1578273617.479:27): pid=9267 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 '10.128.10.45' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 103.526407][ T9421] ------------[ cut here ]------------ [ 103.532138][ T9421] ODEBUG: free active (active state 0) object type: timer_list hint: rfcomm_dlc_timeout+0x0/0xe0 [ 103.542880][ T9421] WARNING: CPU: 0 PID: 9421 at lib/debugobjects.c:481 debug_print_object+0x168/0x250 [ 103.552315][ T9421] Kernel panic - not syncing: panic_on_warn set ... [ 103.558946][ T9421] CPU: 0 PID: 9421 Comm: syz-executor731 Not tainted 5.5.0-rc4-syzkaller #0 [ 103.567609][ T9421] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 103.577656][ T9421] Call Trace: [ 103.580940][ T9421] dump_stack+0x197/0x210 [ 103.585270][ T9421] ? debug_print_object+0x90/0x250 [ 103.590365][ T9421] panic+0x2e3/0x75c [ 103.594281][ T9421] ? add_taint.cold+0x16/0x16 [ 103.598967][ T9421] ? __kasan_check_write+0x14/0x20 [ 103.604061][ T9421] ? __warn.cold+0x14/0x3e [ 103.608485][ T9421] ? __warn+0xd9/0x1cf [ 103.612543][ T9421] ? debug_print_object+0x168/0x250 [ 103.617741][ T9421] __warn.cold+0x2f/0x3e [ 103.622071][ T9421] ? debug_print_object+0x168/0x250 [ 103.627297][ T9421] report_bug+0x289/0x300 [ 103.631724][ T9421] do_error_trap+0x11b/0x200 [ 103.636301][ T9421] do_invalid_op+0x37/0x50 [ 103.640709][ T9421] ? debug_print_object+0x168/0x250 [ 103.645889][ T9421] invalid_op+0x23/0x30 [ 103.650033][ T9421] RIP: 0010:debug_print_object+0x168/0x250 [ 103.655822][ T9421] Code: dd c0 88 71 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd c0 88 71 88 48 c7 c7 20 7e 71 88 e8 87 1f a6 fd <0f> 0b 83 05 73 2f dc 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 [ 103.675570][ T9421] RSP: 0018:ffffc90001cd78b8 EFLAGS: 00010082 [ 103.681621][ T9421] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 103.689574][ T9421] RDX: 0000000000000000 RSI: ffffffff815e8b56 RDI: fffff5200039af09 [ 103.697524][ T9421] RBP: ffffc90001cd78f8 R08: ffff88809f390100 R09: ffffed1015d045c9 [ 103.705484][ T9421] R10: ffffed1015d045c8 R11: ffff8880ae822e43 R12: 0000000000000001 [ 103.713459][ T9421] R13: ffffffff899afae0 R14: ffffffff81645b00 R15: ffff8880a0516930 [ 103.721453][ T9421] ? calc_wheel_index+0x220/0x220 [ 103.726464][ T9421] ? vprintk_func+0x86/0x189 [ 103.731051][ T9421] ? debug_print_object+0x168/0x250 [ 103.736247][ T9421] debug_check_no_obj_freed+0x2d4/0x43f [ 103.741772][ T9421] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 103.747312][ T9421] kfree+0xf8/0x2c0 [ 103.751107][ T9421] rfcomm_dlc_free+0x20/0x30 [ 103.755679][ T9421] rfcomm_dev_ioctl+0x1b9d/0x1e80 [ 103.760692][ T9421] ? mark_held_locks+0xa4/0xf0 [ 103.765456][ T9421] ? lock_sock_nested+0xe2/0x120 [ 103.770374][ T9421] ? rfcomm_tty_install+0x1e0/0x1e0 [ 103.775550][ T9421] ? lock_sock_nested+0x9a/0x120 [ 103.780468][ T9421] ? trace_hardirqs_on+0x67/0x240 [ 103.785499][ T9421] ? __local_bh_enable_ip+0x15a/0x270 [ 103.790857][ T9421] rfcomm_sock_ioctl+0x90/0xb0 [ 103.795642][ T9421] sock_do_ioctl+0xd8/0x2f0 [ 103.800154][ T9421] ? compat_ifr_data_ioctl+0x160/0x160 [ 103.805600][ T9421] ? tomoyo_path_number_perm+0x454/0x520 [ 103.811239][ T9421] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 103.817583][ T9421] ? tomoyo_path_number_perm+0x25e/0x520 [ 103.823204][ T9421] sock_ioctl+0x3ed/0x790 [ 103.827520][ T9421] ? dlci_ioctl_set+0x40/0x40 [ 103.832219][ T9421] ? __fd_install+0x1bc/0x640 [ 103.836897][ T9421] ? dlci_ioctl_set+0x40/0x40 [ 103.841567][ T9421] do_vfs_ioctl+0x977/0x14e0 [ 103.846143][ T9421] ? compat_ioctl_preallocate+0x220/0x220 [ 103.851857][ T9421] ? __kasan_check_read+0x11/0x20 [ 103.856872][ T9421] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 103.863096][ T9421] ? __fd_install+0x1fb/0x640 [ 103.867772][ T9421] ? tomoyo_file_ioctl+0x23/0x30 [ 103.872698][ T9421] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 103.878933][ T9421] ? security_file_ioctl+0x8d/0xc0 [ 103.884039][ T9421] ksys_ioctl+0xab/0xd0 [ 103.888177][ T9421] __x64_sys_ioctl+0x73/0xb0 [ 103.892751][ T9421] do_syscall_64+0xfa/0x790 [ 103.897258][ T9421] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 103.904702][ T9421] RIP: 0033:0x4412b9 [ 103.908580][ T9421] 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 [ 103.928211][ T9421] RSP: 002b:00007ffc506a5218 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 103.936646][ T9421] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 103.944601][ T9421] RDX: 0000000020000100 RSI: 00000000400452c8 RDI: 0000000000000004 [ 103.952555][ T9421] RBP: 0000000000019446 R08: 00000000004002c8 R09: 00000000004002c8 [ 103.960518][ T9421] R10: 00000000004002c8 R11: 0000000000000246 R12: 00000000004020e0 [ 103.968476][ T9421] R13: 0000000000402170 R14: 0000000000000000 R15: 0000000000000000 [ 103.978051][ T9421] Kernel Offset: disabled [ 103.982472][ T9421] Rebooting in 86400 seconds..