[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 57.792517][ T26] audit: type=1800 audit(1570579957.519:25): pid=8719 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 57.831695][ T26] audit: type=1800 audit(1570579957.519:26): pid=8719 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 57.875783][ T26] audit: type=1800 audit(1570579957.519:27): pid=8719 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 '10.128.0.82' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 94.395192][ T8876] ------------[ cut here ]------------ [ 94.400925][ T8876] ODEBUG: free active (active state 0) object type: timer_list hint: rfcomm_dlc_timeout+0x0/0x90 [ 94.411647][ T8876] WARNING: CPU: 0 PID: 8876 at lib/debugobjects.c:481 debug_print_object+0x168/0x250 [ 94.421101][ T8876] Kernel panic - not syncing: panic_on_warn set ... [ 94.427683][ T8876] CPU: 0 PID: 8876 Comm: syz-executor342 Not tainted 5.4.0-rc1+ #0 [ 94.435552][ T8876] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 94.445602][ T8876] Call Trace: [ 94.448881][ T8876] dump_stack+0x172/0x1f0 [ 94.453195][ T8876] ? debug_print_object+0xd0/0x250 [ 94.458286][ T8876] panic+0x2dc/0x755 [ 94.462173][ T8876] ? add_taint.cold+0x16/0x16 [ 94.466840][ T8876] ? __kasan_check_write+0x14/0x20 [ 94.471927][ T8876] ? __warn.cold+0x14/0x3c [ 94.476320][ T8876] ? __warn+0xd9/0x1d0 [ 94.480543][ T8876] ? debug_print_object+0x168/0x250 [ 94.485735][ T8876] __warn.cold+0x2f/0x3c [ 94.489964][ T8876] ? debug_print_object+0x168/0x250 [ 94.495253][ T8876] report_bug+0x289/0x300 [ 94.499625][ T8876] do_error_trap+0x11b/0x200 [ 94.504199][ T8876] do_invalid_op+0x37/0x50 [ 94.508595][ T8876] ? debug_print_object+0x168/0x250 [ 94.513774][ T8876] invalid_op+0x23/0x30 [ 94.517912][ T8876] RIP: 0010:debug_print_object+0x168/0x250 [ 94.523748][ T8876] Code: dd c0 a7 e6 87 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd c0 a7 e6 87 48 c7 c7 20 9d e6 87 e8 70 af ff fd <0f> 0b 83 05 73 43 81 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 [ 94.543505][ T8876] RSP: 0018:ffff888096a478d8 EFLAGS: 00010086 [ 94.549553][ T8876] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 94.557502][ T8876] RDX: 0000000000000000 RSI: ffffffff815cb5f6 RDI: ffffed1012d48f0d [ 94.565452][ T8876] RBP: ffff888096a47918 R08: ffff88808c4ba040 R09: ffffed1015d04101 [ 94.573839][ T8876] R10: ffffed1015d04100 R11: ffff8880ae820807 R12: 0000000000000001 [ 94.581834][ T8876] R13: ffffffff88fb5340 R14: ffffffff816271e0 R15: ffff8880a947ab28 [ 94.589814][ T8876] ? calc_wheel_index+0x220/0x220 [ 94.594842][ T8876] ? vprintk_func+0x86/0x189 [ 94.599433][ T8876] ? debug_print_object+0x168/0x250 [ 94.604618][ T8876] debug_check_no_obj_freed+0x2d4/0x43f [ 94.610145][ T8876] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 94.615670][ T8876] kfree+0xf8/0x2c0 [ 94.619457][ T8876] rfcomm_dlc_free+0x20/0x30 [ 94.624233][ T8876] rfcomm_dev_ioctl+0x183e/0x1b80 [ 94.629249][ T8876] ? mark_held_locks+0xa4/0xf0 [ 94.634340][ T8876] ? __local_bh_enable_ip+0x15a/0x270 [ 94.639691][ T8876] ? lock_sock_nested+0xe2/0x120 [ 94.644616][ T8876] ? __local_bh_enable_ip+0x15a/0x270 [ 94.649978][ T8876] ? rfcomm_dev_state_change+0x150/0x150 [ 94.655605][ T8876] ? __local_bh_enable_ip+0x15a/0x270 [ 94.660986][ T8876] rfcomm_sock_ioctl+0x90/0xb0 [ 94.665730][ T8876] sock_do_ioctl+0xd8/0x2f0 [ 94.670311][ T8876] ? compat_ifr_data_ioctl+0x160/0x160 [ 94.675769][ T8876] ? tomoyo_path_number_perm+0x459/0x520 [ 94.681388][ T8876] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 94.687606][ T8876] ? tomoyo_path_number_perm+0x263/0x520 [ 94.693230][ T8876] sock_ioctl+0x3ed/0x780 [ 94.697544][ T8876] ? dlci_ioctl_set+0x40/0x40 [ 94.702214][ T8876] ? __fd_install+0x1bc/0x640 [ 94.706885][ T8876] ? dlci_ioctl_set+0x40/0x40 [ 94.711545][ T8876] do_vfs_ioctl+0xdb6/0x13e0 [ 94.716210][ T8876] ? ioctl_preallocate+0x210/0x210 [ 94.721321][ T8876] ? __kasan_check_read+0x11/0x20 [ 94.726328][ T8876] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 94.732556][ T8876] ? __fd_install+0x200/0x640 [ 94.737215][ T8876] ? tomoyo_file_ioctl+0x23/0x30 [ 94.742155][ T8876] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 94.748372][ T8876] ? security_file_ioctl+0x8d/0xc0 [ 94.753472][ T8876] ksys_ioctl+0xab/0xd0 [ 94.757625][ T8876] __x64_sys_ioctl+0x73/0xb0 [ 94.762210][ T8876] do_syscall_64+0xfa/0x760 [ 94.766718][ T8876] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 94.772587][ T8876] RIP: 0033:0x441229 [ 94.776482][ T8876] 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 [ 94.796087][ T8876] RSP: 002b:00007fff3c8bd568 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 94.804492][ T8876] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441229 [ 94.812442][ T8876] RDX: 0000000020000100 RSI: 00000000400452c8 RDI: 0000000000000004 [ 94.820391][ T8876] RBP: 0000000000017083 R08: 00000000004002c8 R09: 00000000004002c8 [ 94.828341][ T8876] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402050 [ 94.836303][ T8876] R13: 00000000004020e0 R14: 0000000000000000 R15: 0000000000000000 [ 94.845701][ T8876] Kernel Offset: disabled [ 94.850084][ T8876] Rebooting in 86400 seconds..