[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 55.149269][ T26] audit: type=1800 audit(1571393203.257:25): pid=8516 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 55.194564][ T26] audit: type=1800 audit(1571393203.257:26): pid=8516 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 55.216329][ T26] audit: type=1800 audit(1571393203.267:27): pid=8516 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 '10.128.1.45' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 71.153081][ T8674] ------------[ cut here ]------------ [ 71.158652][ T8674] ODEBUG: free active (active state 0) object type: timer_list hint: rfcomm_dlc_timeout+0x0/0x90 [ 71.169374][ T8674] WARNING: CPU: 0 PID: 8674 at lib/debugobjects.c:481 debug_print_object+0x168/0x250 [ 71.178800][ T8674] Kernel panic - not syncing: panic_on_warn set ... [ 71.185405][ T8674] CPU: 0 PID: 8674 Comm: syz-executor483 Not tainted 5.4.0-rc3+ #0 [ 71.193269][ T8674] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 71.203302][ T8674] Call Trace: [ 71.206577][ T8674] dump_stack+0x172/0x1f0 [ 71.211009][ T8674] ? debug_print_object+0xf0/0x250 [ 71.216096][ T8674] panic+0x2e3/0x75c [ 71.219972][ T8674] ? add_taint.cold+0x16/0x16 [ 71.224638][ T8674] ? __kasan_check_write+0x14/0x20 [ 71.229724][ T8674] ? __warn.cold+0x14/0x35 [ 71.234112][ T8674] ? __warn+0xd9/0x1d0 [ 71.238161][ T8674] ? debug_print_object+0x168/0x250 [ 71.243332][ T8674] __warn.cold+0x2f/0x35 [ 71.247558][ T8674] ? debug_print_object+0x168/0x250 [ 71.252731][ T8674] report_bug+0x289/0x300 [ 71.257039][ T8674] do_error_trap+0x11b/0x200 [ 71.261619][ T8674] do_invalid_op+0x37/0x50 [ 71.266011][ T8674] ? debug_print_object+0x168/0x250 [ 71.271186][ T8674] invalid_op+0x23/0x30 [ 71.275323][ T8674] RIP: 0010:debug_print_object+0x168/0x250 [ 71.281107][ T8674] Code: dd 60 f7 e6 87 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd 60 f7 e6 87 48 c7 c7 c0 ec e6 87 e8 50 45 fd fd <0f> 0b 83 05 13 93 7f 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 [ 71.300692][ T8674] RSP: 0018:ffff88808de878d8 EFLAGS: 00010086 [ 71.306733][ T8674] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 71.314684][ T8674] RDX: 0000000000000000 RSI: ffffffff815cb646 RDI: ffffed1011bd0f0d [ 71.322631][ T8674] RBP: ffff88808de87918 R08: ffff8880a04ee0c0 R09: ffffed1015d04101 [ 71.330585][ T8674] R10: ffffed1015d04100 R11: ffff8880ae820807 R12: 0000000000000001 [ 71.338583][ T8674] R13: ffffffff88fb5540 R14: ffffffff81627230 R15: ffff88809d38b0e0 [ 71.346553][ T8674] ? calc_wheel_index+0x220/0x220 [ 71.351574][ T8674] ? vprintk_func+0x86/0x189 [ 71.356148][ T8674] ? debug_print_object+0x168/0x250 [ 71.361323][ T8674] debug_check_no_obj_freed+0x2d4/0x43f [ 71.366848][ T8674] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 71.372393][ T8674] kfree+0xf8/0x2c0 [ 71.376181][ T8674] rfcomm_dlc_free+0x20/0x30 [ 71.380753][ T8674] rfcomm_dev_ioctl+0x183e/0x1b80 [ 71.385754][ T8674] ? mark_held_locks+0xa4/0xf0 [ 71.390506][ T8674] ? __local_bh_enable_ip+0x15a/0x270 [ 71.395864][ T8674] ? lock_sock_nested+0xe2/0x120 [ 71.400778][ T8674] ? __local_bh_enable_ip+0x15a/0x270 [ 71.406135][ T8674] ? rfcomm_dev_state_change+0x150/0x150 [ 71.411746][ T8674] ? __local_bh_enable_ip+0x15a/0x270 [ 71.417101][ T8674] rfcomm_sock_ioctl+0x90/0xb0 [ 71.421846][ T8674] sock_do_ioctl+0xd8/0x2f0 [ 71.426327][ T8674] ? compat_ifr_data_ioctl+0x160/0x160 [ 71.431767][ T8674] ? tomoyo_path_number_perm+0x459/0x520 [ 71.437380][ T8674] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 71.443599][ T8674] ? tomoyo_path_number_perm+0x263/0x520 [ 71.449216][ T8674] sock_ioctl+0x3ed/0x780 [ 71.453525][ T8674] ? dlci_ioctl_set+0x40/0x40 [ 71.458181][ T8674] ? __fd_install+0x1bc/0x640 [ 71.462835][ T8674] ? dlci_ioctl_set+0x40/0x40 [ 71.467532][ T8674] do_vfs_ioctl+0xdb6/0x13e0 [ 71.472116][ T8674] ? ioctl_preallocate+0x210/0x210 [ 71.477212][ T8674] ? __kasan_check_read+0x11/0x20 [ 71.482217][ T8674] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 71.488434][ T8674] ? __fd_install+0x200/0x640 [ 71.493091][ T8674] ? tomoyo_file_ioctl+0x23/0x30 [ 71.498020][ T8674] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 71.504237][ T8674] ? security_file_ioctl+0x8d/0xc0 [ 71.509327][ T8674] ksys_ioctl+0xab/0xd0 [ 71.513462][ T8674] __x64_sys_ioctl+0x73/0xb0 [ 71.518029][ T8674] do_syscall_64+0xfa/0x760 [ 71.522513][ T8674] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 71.528382][ T8674] RIP: 0033:0x441229 [ 71.532252][ T8674] 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 [ 71.551841][ T8674] RSP: 002b:00007ffc41cdde28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 71.560228][ T8674] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441229 [ 71.568176][ T8674] RDX: 0000000020000100 RSI: 00000000400452c8 RDI: 0000000000000004 [ 71.576123][ T8674] RBP: 00000000000115e0 R08: 00000000004002c8 R09: 00000000004002c8 [ 71.584070][ T8674] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402050 [ 71.592014][ T8674] R13: 00000000004020e0 R14: 0000000000000000 R15: 0000000000000000 [ 71.601314][ T8674] Kernel Offset: disabled [ 71.605691][ T8674] Rebooting in 86400 seconds..