[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 62.294494][ T26] audit: type=1800 audit(1572151249.329:25): pid=8650 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 62.336207][ T26] audit: type=1800 audit(1572151249.339:26): pid=8650 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 62.381862][ T26] audit: type=1800 audit(1572151249.339:27): pid=8650 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 '10.128.0.123' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 98.829728][ T8806] ------------[ cut here ]------------ [ 98.835887][ T8806] ODEBUG: free active (active state 0) object type: timer_list hint: rfcomm_dlc_timeout+0x0/0x90 [ 98.846655][ T8806] WARNING: CPU: 0 PID: 8806 at lib/debugobjects.c:481 debug_print_object+0x168/0x250 [ 98.856113][ T8806] Kernel panic - not syncing: panic_on_warn set ... [ 98.862716][ T8806] CPU: 0 PID: 8806 Comm: syz-executor005 Not tainted 5.4.0-rc4+ #0 [ 98.870596][ T8806] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 98.880646][ T8806] Call Trace: [ 98.883954][ T8806] dump_stack+0x172/0x1f0 [ 98.888293][ T8806] ? debug_print_object+0xc0/0x250 [ 98.893403][ T8806] panic+0x2e3/0x75c [ 98.897306][ T8806] ? add_taint.cold+0x16/0x16 [ 98.902000][ T8806] ? __kasan_check_write+0x14/0x20 [ 98.907129][ T8806] ? __warn.cold+0x14/0x35 [ 98.911572][ T8806] ? __warn+0xd9/0x1d0 [ 98.915663][ T8806] ? debug_print_object+0x168/0x250 [ 98.920873][ T8806] __warn.cold+0x2f/0x35 [ 98.925730][ T8806] ? debug_print_object+0x168/0x250 [ 98.930957][ T8806] report_bug+0x289/0x300 [ 98.935308][ T8806] do_error_trap+0x11b/0x200 [ 98.939920][ T8806] do_invalid_op+0x37/0x50 [ 98.944355][ T8806] ? debug_print_object+0x168/0x250 [ 98.949698][ T8806] invalid_op+0x23/0x30 [ 98.953912][ T8806] RIP: 0010:debug_print_object+0x168/0x250 [ 98.959938][ T8806] 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 20 28 fd fd <0f> 0b 83 05 e3 77 7f 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 [ 98.979914][ T8806] RSP: 0018:ffff88808a48f8d8 EFLAGS: 00010086 [ 98.986415][ T8806] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 98.994692][ T8806] RDX: 0000000000000000 RSI: ffffffff815cc2b6 RDI: ffffed1011491f0d [ 99.003006][ T8806] RBP: ffff88808a48f918 R08: ffff8880962b04c0 R09: ffffed1015d04101 [ 99.011460][ T8806] R10: ffffed1015d04100 R11: ffff8880ae820807 R12: 0000000000000001 [ 99.019896][ T8806] R13: ffffffff88fb58c0 R14: ffffffff81627ea0 R15: ffff8880953592d8 [ 99.028369][ T8806] ? calc_wheel_index+0x220/0x220 [ 99.033495][ T8806] ? vprintk_func+0x86/0x189 [ 99.038089][ T8806] ? debug_print_object+0x168/0x250 [ 99.043299][ T8806] debug_check_no_obj_freed+0x2d4/0x43f [ 99.048865][ T8806] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 99.054443][ T8806] kfree+0xf8/0x2c0 [ 99.058264][ T8806] rfcomm_dlc_free+0x20/0x30 [ 99.062876][ T8806] rfcomm_dev_ioctl+0x183e/0x1b80 [ 99.068237][ T8806] ? mark_held_locks+0xa4/0xf0 [ 99.073299][ T8806] ? __local_bh_enable_ip+0x15a/0x270 [ 99.078826][ T8806] ? lock_sock_nested+0xe2/0x120 [ 99.083778][ T8806] ? __local_bh_enable_ip+0x15a/0x270 [ 99.089159][ T8806] ? rfcomm_dev_state_change+0x150/0x150 [ 99.094932][ T8806] ? __local_bh_enable_ip+0x15a/0x270 [ 99.100630][ T8806] rfcomm_sock_ioctl+0x90/0xb0 [ 99.105401][ T8806] sock_do_ioctl+0xd8/0x2f0 [ 99.109937][ T8806] ? compat_ifr_data_ioctl+0x160/0x160 [ 99.115398][ T8806] ? tomoyo_path_number_perm+0x459/0x520 [ 99.121051][ T8806] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 99.127474][ T8806] ? tomoyo_path_number_perm+0x263/0x520 [ 99.133157][ T8806] sock_ioctl+0x3ed/0x790 [ 99.137506][ T8806] ? dlci_ioctl_set+0x40/0x40 [ 99.142202][ T8806] ? __fd_install+0x1bc/0x640 [ 99.146889][ T8806] ? dlci_ioctl_set+0x40/0x40 [ 99.151576][ T8806] do_vfs_ioctl+0xdb6/0x13e0 [ 99.156177][ T8806] ? ioctl_preallocate+0x210/0x210 [ 99.161282][ T8806] ? __kasan_check_read+0x11/0x20 [ 99.166305][ T8806] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 99.172545][ T8806] ? __fd_install+0x200/0x640 [ 99.177224][ T8806] ? tomoyo_file_ioctl+0x23/0x30 [ 99.184967][ T8806] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 99.191218][ T8806] ? security_file_ioctl+0x8d/0xc0 [ 99.196354][ T8806] ksys_ioctl+0xab/0xd0 [ 99.200518][ T8806] __x64_sys_ioctl+0x73/0xb0 [ 99.205153][ T8806] do_syscall_64+0xfa/0x760 [ 99.209844][ T8806] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 99.215892][ T8806] RIP: 0033:0x441229 [ 99.219902][ T8806] 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 [ 99.241358][ T8806] RSP: 002b:00007ffe3ebff1b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 99.250040][ T8806] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441229 [ 99.258028][ T8806] RDX: 0000000020000100 RSI: 00000000400452c8 RDI: 0000000000000004 [ 99.266582][ T8806] RBP: 00000000000181ee R08: 00000000004002c8 R09: 00000000004002c8 [ 99.274863][ T8806] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402050 [ 99.283370][ T8806] R13: 00000000004020e0 R14: 0000000000000000 R15: 0000000000000000 [ 99.293877][ T8806] Kernel Offset: disabled [ 99.298325][ T8806] Rebooting in 86400 seconds..