[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 54.704175][ T26] audit: type=1800 audit(1569971869.029:25): pid=8529 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 54.744010][ T26] audit: type=1800 audit(1569971869.039:26): pid=8529 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 54.795198][ T26] audit: type=1800 audit(1569971869.039:27): pid=8529 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 '10.128.1.0' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 67.760518][ T8685] ------------[ cut here ]------------ [ 67.766113][ T8685] ODEBUG: free active (active state 0) object type: timer_list hint: rfcomm_dlc_timeout+0x0/0x90 [ 67.776897][ T8685] WARNING: CPU: 0 PID: 8685 at lib/debugobjects.c:481 debug_print_object+0x168/0x250 [ 67.786389][ T8685] Kernel panic - not syncing: panic_on_warn set ... [ 67.793018][ T8685] CPU: 0 PID: 8685 Comm: syz-executor223 Not tainted 5.3.0+ #0 [ 67.800538][ T8685] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.810571][ T8685] Call Trace: [ 67.813847][ T8685] dump_stack+0x172/0x1f0 [ 67.818159][ T8685] ? debug_print_object+0x90/0x250 [ 67.823258][ T8685] panic+0x2dc/0x755 [ 67.827140][ T8685] ? add_taint.cold+0x16/0x16 [ 67.831804][ T8685] ? __kasan_check_write+0x14/0x20 [ 67.836896][ T8685] ? __warn.cold+0x14/0x3c [ 67.841287][ T8685] ? __warn+0xd9/0x1d0 [ 67.845339][ T8685] ? debug_print_object+0x168/0x250 [ 67.850518][ T8685] __warn.cold+0x2f/0x3c [ 67.854750][ T8685] ? debug_print_object+0x168/0x250 [ 67.859931][ T8685] report_bug+0x289/0x300 [ 67.864241][ T8685] do_error_trap+0x11b/0x200 [ 67.868824][ T8685] do_invalid_op+0x37/0x50 [ 67.873229][ T8685] ? debug_print_object+0x168/0x250 [ 67.878515][ T8685] invalid_op+0x23/0x30 [ 67.882755][ T8685] RIP: 0010:debug_print_object+0x168/0x250 [ 67.888542][ T8685] Code: dd 80 a6 e6 87 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd 80 a6 e6 87 48 c7 c7 e0 9b e6 87 e8 80 be ff fd <0f> 0b 83 05 73 5b 81 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 [ 67.908376][ T8685] RSP: 0018:ffff8880973a78d8 EFLAGS: 00010086 [ 67.914425][ T8685] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 67.922427][ T8685] RDX: 0000000000000000 RSI: ffffffff815ca866 RDI: ffffed1012e74f0d [ 67.930381][ T8685] RBP: ffff8880973a7918 R08: ffff8880938c4200 R09: ffffed1015d04101 [ 67.938332][ T8685] R10: ffffed1015d04100 R11: ffff8880ae820807 R12: 0000000000000001 [ 67.946283][ T8685] R13: ffffffff88fb5240 R14: ffffffff81626450 R15: ffff888091118968 [ 67.954245][ T8685] ? calc_wheel_index+0x220/0x220 [ 67.959252][ T8685] ? vprintk_func+0x86/0x189 [ 67.963828][ T8685] ? debug_print_object+0x168/0x250 [ 67.969009][ T8685] debug_check_no_obj_freed+0x2d4/0x43f [ 67.974535][ T8685] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.980069][ T8685] kfree+0xf8/0x2c0 [ 67.984037][ T8685] rfcomm_dlc_free+0x20/0x30 [ 67.988606][ T8685] rfcomm_dev_ioctl+0x183e/0x1b80 [ 67.993628][ T8685] ? mark_held_locks+0xa4/0xf0 [ 67.998393][ T8685] ? __local_bh_enable_ip+0x15a/0x270 [ 68.003755][ T8685] ? lock_sock_nested+0xe2/0x120 [ 68.008690][ T8685] ? __local_bh_enable_ip+0x15a/0x270 [ 68.014073][ T8685] ? rfcomm_dev_state_change+0x150/0x150 [ 68.019694][ T8685] ? __local_bh_enable_ip+0x15a/0x270 [ 68.025050][ T8685] rfcomm_sock_ioctl+0x90/0xb0 [ 68.029794][ T8685] sock_do_ioctl+0xd8/0x2f0 [ 68.034292][ T8685] ? compat_ifr_data_ioctl+0x160/0x160 [ 68.039735][ T8685] ? tomoyo_path_number_perm+0x459/0x520 [ 68.045358][ T8685] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 68.051578][ T8685] ? tomoyo_path_number_perm+0x263/0x520 [ 68.057194][ T8685] sock_ioctl+0x3ed/0x780 [ 68.061515][ T8685] ? dlci_ioctl_set+0x40/0x40 [ 68.066228][ T8685] ? __fd_install+0x1bc/0x640 [ 68.071077][ T8685] ? dlci_ioctl_set+0x40/0x40 [ 68.075771][ T8685] do_vfs_ioctl+0xdb6/0x13e0 [ 68.080352][ T8685] ? ioctl_preallocate+0x210/0x210 [ 68.085449][ T8685] ? __kasan_check_read+0x11/0x20 [ 68.090480][ T8685] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 68.096741][ T8685] ? __fd_install+0x200/0x640 [ 68.101404][ T8685] ? tomoyo_file_ioctl+0x23/0x30 [ 68.106328][ T8685] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 68.112548][ T8685] ? security_file_ioctl+0x8d/0xc0 [ 68.117645][ T8685] ksys_ioctl+0xab/0xd0 [ 68.121798][ T8685] __x64_sys_ioctl+0x73/0xb0 [ 68.126369][ T8685] do_syscall_64+0xfa/0x760 [ 68.130868][ T8685] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 68.136748][ T8685] RIP: 0033:0x441229 [ 68.140627][ T8685] 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 [ 68.160210][ T8685] RSP: 002b:00007fff456957a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 68.168714][ T8685] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441229 [ 68.176672][ T8685] RDX: 0000000020000100 RSI: 00000000400452c8 RDI: 0000000000000004 [ 68.184624][ T8685] RBP: 0000000000010889 R08: 00000000004002c8 R09: 00000000004002c8 [ 68.192575][ T8685] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402050 [ 68.200528][ T8685] R13: 00000000004020e0 R14: 0000000000000000 R15: 0000000000000000 [ 68.210077][ T8685] Kernel Offset: disabled [ 68.214524][ T8685] Rebooting in 86400 seconds..