[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 68.166878][ T27] audit: type=1800 audit(1584938067.272:25): pid=9373 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 68.186826][ T27] audit: type=1800 audit(1584938067.272:26): pid=9373 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 68.240552][ T27] audit: type=1800 audit(1584938067.272:27): pid=9373 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 '10.128.0.10' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 76.850528][ T9528] IPVS: ftp: loaded support on port[0] = 21 [ 76.884572][ T9531] ------------[ cut here ]------------ [ 76.890215][ T9531] ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0 [ 76.899245][ T9531] WARNING: CPU: 1 PID: 9531 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 76.908699][ T9531] Kernel panic - not syncing: panic_on_warn set ... [ 76.915271][ T9531] CPU: 1 PID: 9531 Comm: syz-executor653 Not tainted 5.6.0-rc6-syzkaller #0 [ 76.923922][ T9531] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.935004][ T9531] Call Trace: [ 76.938282][ T9531] dump_stack+0x188/0x20d [ 76.942648][ T9531] ? debug_print_object+0xc0/0x250 [ 76.947753][ T9531] panic+0x2e3/0x75c [ 76.951651][ T9531] ? add_taint.cold+0x16/0x16 [ 76.956446][ T9531] ? __probe_kernel_read+0x188/0x1d0 [ 76.961719][ T9531] ? __warn.cold+0x14/0x35 [ 76.966225][ T9531] ? __warn+0xd5/0x1c8 [ 76.970339][ T9531] ? debug_print_object+0x160/0x250 [ 76.975554][ T9531] __warn.cold+0x2f/0x35 [ 76.979790][ T9531] ? debug_print_object+0x160/0x250 [ 76.984975][ T9531] report_bug+0x27b/0x2f0 [ 76.989293][ T9531] do_error_trap+0x12b/0x220 [ 76.993897][ T9531] ? debug_print_object+0x160/0x250 [ 76.999100][ T9531] do_invalid_op+0x32/0x40 [ 77.003500][ T9531] ? debug_print_object+0x160/0x250 [ 77.008685][ T9531] invalid_op+0x23/0x30 [ 77.012842][ T9531] RIP: 0010:debug_print_object+0x160/0x250 [ 77.018656][ T9531] Code: dd 00 f2 51 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd 00 f2 51 88 48 c7 c7 60 e7 51 88 e8 78 29 b1 fd <0f> 0b 83 05 cb f6 d2 06 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 77.038255][ T9531] RSP: 0018:ffffc90001ef7168 EFLAGS: 00010286 [ 77.044314][ T9531] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 77.052271][ T9531] RDX: 0000000000000000 RSI: ffffffff815c06c1 RDI: fffff520003dee1f [ 77.060228][ T9531] RBP: 0000000000000001 R08: ffff8880901fa280 R09: fffffbfff180e578 [ 77.068196][ T9531] R10: fffffbfff180e577 R11: ffffffff8c072bbf R12: ffffffff897acba0 [ 77.076158][ T9531] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920003dee3a [ 77.084137][ T9531] ? vprintk_func+0x81/0x17e [ 77.088719][ T9531] ? debug_print_object+0x160/0x250 [ 77.093925][ T9531] ? lockdep_hardirqs_on+0x417/0x5d0 [ 77.099197][ T9531] debug_object_activate+0x346/0x470 [ 77.104482][ T9531] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 77.110289][ T9531] ? debug_object_init_on_stack+0x20/0x20 [ 77.116003][ T9531] ? find_held_lock+0x2d/0x110 [ 77.120773][ T9531] ? free_object+0x70/0x70 [ 77.125189][ T9531] ? lock_downgrade+0x7f0/0x7f0 [ 77.130025][ T9531] ? delayed_work_timer_fn+0x90/0x90 [ 77.135303][ T9531] call_rcu+0x2c/0x690 [ 77.139374][ T9531] queue_rcu_work+0x82/0xa0 [ 77.143865][ T9531] route4_change+0x19e8/0x2250 [ 77.148618][ T9531] ? route4_destroy+0x800/0x800 [ 77.153465][ T9531] ? wait_for_completion+0x3c0/0x3c0 [ 77.158967][ T9531] tc_new_tfilter+0xa59/0x20b0 [ 77.163738][ T9531] ? route4_destroy+0x800/0x800 [ 77.168585][ T9531] ? tc_del_tfilter+0x1430/0x1430 [ 77.173602][ T9531] ? __lock_acquire+0x80b/0x3ca0 [ 77.178530][ T9531] ? apparmor_capable+0x454/0x8a0 [ 77.183560][ T9531] ? rcu_read_lock_held+0x9c/0xb0 [ 77.188593][ T9531] ? tc_del_tfilter+0x1430/0x1430 [ 77.193617][ T9531] rtnetlink_rcv_msg+0x810/0xad0 [ 77.198549][ T9531] ? rtnl_bridge_getlink+0x880/0x880 [ 77.203830][ T9531] ? mark_held_locks+0xe0/0xe0 [ 77.208632][ T9531] ? netlink_deliver_tap+0x146/0xb50 [ 77.213909][ T9531] netlink_rcv_skb+0x15a/0x410 [ 77.218836][ T9531] ? rtnl_bridge_getlink+0x880/0x880 [ 77.224128][ T9531] ? netlink_ack+0xa80/0xa80 [ 77.228717][ T9531] netlink_unicast+0x537/0x740 [ 77.233472][ T9531] ? netlink_attachskb+0x810/0x810 [ 77.238566][ T9531] ? _copy_from_iter_full+0x25c/0x870 [ 77.243939][ T9531] ? __phys_addr_symbol+0x2c/0x70 [ 77.249190][ T9531] ? __check_object_size+0x171/0x437 [ 77.254487][ T9531] netlink_sendmsg+0x882/0xe10 [ 77.259255][ T9531] ? aa_af_perm+0x260/0x260 [ 77.263789][ T9531] ? netlink_unicast+0x740/0x740 [ 77.268719][ T9531] ? netlink_unicast+0x740/0x740 [ 77.273649][ T9531] sock_sendmsg+0xcf/0x120 [ 77.278050][ T9531] ____sys_sendmsg+0x6b9/0x7d0 [ 77.282800][ T9531] ? kernel_sendmsg+0x50/0x50 [ 77.287499][ T9531] ___sys_sendmsg+0x100/0x170 [ 77.292170][ T9531] ? sendmsg_copy_msghdr+0x70/0x70 [ 77.297391][ T9531] ? __fget_files+0x329/0x4f0 [ 77.302081][ T9531] ? ksys_dup3+0x3c0/0x3c0 [ 77.306518][ T9531] ? __fget_light+0x208/0x270 [ 77.311190][ T9531] __sys_sendmsg+0xec/0x1b0 [ 77.315682][ T9531] ? __sys_sendmsg_sock+0xb0/0xb0 [ 77.320791][ T9531] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 77.326811][ T9531] ? __ia32_sys_futex_time32+0x32a/0x494 [ 77.332437][ T9531] ? fpregs_mark_activate+0x320/0x320 [ 77.337791][ T9531] ? trace_hardirqs_off_caller+0x55/0x230 [ 77.343501][ T9531] ? do_fast_syscall_32+0xcc/0xe8f [ 77.348615][ T9531] do_fast_syscall_32+0x270/0xe8f [ 77.353631][ T9531] entry_SYSENTER_compat+0x70/0x7f [ 77.360432][ T9531] Kernel Offset: disabled [ 77.364859][ T9531] Rebooting in 86400 seconds..