[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 57.601950][ T26] audit: type=1800 audit(1571158766.833:25): pid=8466 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 57.646361][ T26] audit: type=1800 audit(1571158766.843:26): pid=8466 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 57.707908][ T26] audit: type=1800 audit(1571158766.843:27): pid=8466 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[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.2' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 84.303822][ T8620] ------------[ cut here ]------------ [ 84.309465][ T8620] ODEBUG: free active (active state 0) object type: timer_list hint: rfcomm_dlc_timeout+0x0/0x90 [ 84.320179][ T8620] WARNING: CPU: 1 PID: 8620 at lib/debugobjects.c:481 debug_print_object+0x168/0x250 [ 84.329656][ T8620] Kernel panic - not syncing: panic_on_warn set ... [ 84.336231][ T8620] CPU: 1 PID: 8620 Comm: syz-executor766 Not tainted 5.4.0-rc3-next-20191015 #0 [ 84.345769][ T8620] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 84.355923][ T8620] Call Trace: [ 84.359204][ T8620] dump_stack+0x172/0x1f0 [ 84.363518][ T8620] ? debug_print_object+0x100/0x250 [ 84.368736][ T8620] panic+0x2e3/0x75c [ 84.372610][ T8620] ? add_taint.cold+0x16/0x16 [ 84.377279][ T8620] ? __kasan_check_write+0x14/0x20 [ 84.382365][ T8620] ? __warn.cold+0x14/0x35 [ 84.386801][ T8620] ? __warn+0xd9/0x1d0 [ 84.390856][ T8620] ? debug_print_object+0x168/0x250 [ 84.396031][ T8620] __warn.cold+0x2f/0x35 [ 84.400307][ T8620] ? debug_print_object+0x168/0x250 [ 84.405486][ T8620] report_bug+0x289/0x300 [ 84.409840][ T8620] do_error_trap+0x11b/0x200 [ 84.414408][ T8620] do_invalid_op+0x37/0x50 [ 84.418801][ T8620] ? debug_print_object+0x168/0x250 [ 84.424026][ T8620] invalid_op+0x23/0x30 [ 84.428161][ T8620] RIP: 0010:debug_print_object+0x168/0x250 [ 84.434203][ T8620] Code: dd 00 cc e6 87 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd 00 cc e6 87 48 c7 c7 60 c1 e6 87 e8 e0 4c ff fd <0f> 0b 83 05 63 55 81 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 [ 84.453790][ T8620] RSP: 0018:ffff88809e65f8d8 EFLAGS: 00010086 [ 84.459842][ T8620] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 84.467834][ T8620] RDX: 0000000000000000 RSI: ffffffff815ce856 RDI: ffffed1013ccbf0d [ 84.475930][ T8620] RBP: ffff88809e65f918 R08: ffff88809b240640 R09: ffffed1015d24109 [ 84.483888][ T8620] R10: ffffed1015d24108 R11: ffff8880ae920847 R12: 0000000000000001 [ 84.494038][ T8620] R13: ffffffff88fb5c40 R14: ffffffff8162a460 R15: ffff8880a1361150 [ 84.502017][ T8620] ? calc_wheel_index+0x220/0x220 [ 84.507028][ T8620] ? vprintk_func+0x86/0x189 [ 84.511602][ T8620] ? debug_print_object+0x168/0x250 [ 84.516783][ T8620] debug_check_no_obj_freed+0x2d4/0x43f [ 84.522316][ T8620] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 84.527859][ T8620] kfree+0xf8/0x2c0 [ 84.531648][ T8620] rfcomm_dlc_free+0x20/0x30 [ 84.536221][ T8620] rfcomm_dev_ioctl+0x18b3/0x1c00 [ 84.541410][ T8620] ? mark_held_locks+0xa4/0xf0 [ 84.546154][ T8620] ? __local_bh_enable_ip+0x15a/0x270 [ 84.551503][ T8620] ? lock_sock_nested+0xe2/0x120 [ 84.556424][ T8620] ? __local_bh_enable_ip+0x15a/0x270 [ 84.561779][ T8620] ? rfcomm_dev_state_change+0x150/0x150 [ 84.567497][ T8620] ? __local_bh_enable_ip+0x15a/0x270 [ 84.572849][ T8620] rfcomm_sock_ioctl+0x90/0xb0 [ 84.577616][ T8620] sock_do_ioctl+0xd8/0x2f0 [ 84.582106][ T8620] ? compat_ifr_data_ioctl+0x160/0x160 [ 84.587551][ T8620] ? tomoyo_path_number_perm+0x454/0x520 [ 84.593600][ T8620] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 84.599819][ T8620] ? tomoyo_path_number_perm+0x25e/0x520 [ 84.605438][ T8620] sock_ioctl+0x3ed/0x780 [ 84.609759][ T8620] ? dlci_ioctl_set+0x40/0x40 [ 84.614428][ T8620] ? __fd_install+0x1bc/0x640 [ 84.619101][ T8620] ? dlci_ioctl_set+0x40/0x40 [ 84.623764][ T8620] do_vfs_ioctl+0xdb6/0x13e0 [ 84.628334][ T8620] ? compat_ioctl_preallocate+0x210/0x210 [ 84.634030][ T8620] ? __kasan_check_read+0x11/0x20 [ 84.639036][ T8620] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 84.645265][ T8620] ? __fd_install+0x1fb/0x640 [ 84.649922][ T8620] ? tomoyo_file_ioctl+0x23/0x30 [ 84.654950][ T8620] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 84.661179][ T8620] ? security_file_ioctl+0x8d/0xc0 [ 84.666289][ T8620] ksys_ioctl+0xab/0xd0 [ 84.670433][ T8620] __x64_sys_ioctl+0x73/0xb0 [ 84.675003][ T8620] do_syscall_64+0xfa/0x760 [ 84.679485][ T8620] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 84.685371][ T8620] RIP: 0033:0x441229 [ 84.689244][ T8620] 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 [ 84.708839][ T8620] RSP: 002b:00007ffc99ef7f68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 84.717228][ T8620] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441229 [ 84.725177][ T8620] RDX: 0000000020000100 RSI: 00000000400452c8 RDI: 0000000000000004 [ 84.733139][ T8620] RBP: 000000000001492e R08: 00000000004002c8 R09: 00000000004002c8 [ 84.741101][ T8620] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402050 [ 84.749070][ T8620] R13: 00000000004020e0 R14: 0000000000000000 R15: 0000000000000000 [ 84.758648][ T8620] Kernel Offset: disabled [ 84.763029][ T8620] Rebooting in 86400 seconds..