[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 67.886555][ T26] audit: type=1800 audit(1584828266.145:25): pid=9288 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 67.906648][ T26] audit: type=1800 audit(1584828266.145:26): pid=9288 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 67.958609][ T26] audit: type=1800 audit(1584828266.145:27): pid=9288 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 '10.128.0.112' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 79.272230][ T9444] IPVS: ftp: loaded support on port[0] = 21 [ 79.305821][ T9445] ------------[ cut here ]------------ [ 79.311422][ T9445] ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0 [ 79.320522][ T9445] WARNING: CPU: 0 PID: 9445 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 79.330089][ T9445] Kernel panic - not syncing: panic_on_warn set ... [ 79.336668][ T9445] CPU: 0 PID: 9445 Comm: syz-executor290 Not tainted 5.6.0-rc5-syzkaller #0 [ 79.345660][ T9445] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 79.355699][ T9445] Call Trace: [ 79.358977][ T9445] dump_stack+0x188/0x20d [ 79.363305][ T9445] ? debug_print_object+0x80/0x250 [ 79.368410][ T9445] panic+0x2e3/0x75c [ 79.372294][ T9445] ? add_taint.cold+0x16/0x16 [ 79.376962][ T9445] ? __probe_kernel_read+0x188/0x1d0 [ 79.382242][ T9445] ? __warn.cold+0x14/0x35 [ 79.386638][ T9445] ? __warn+0xd5/0x1c8 [ 79.390687][ T9445] ? debug_print_object+0x160/0x250 [ 79.395863][ T9445] __warn.cold+0x2f/0x35 [ 79.400122][ T9445] ? debug_print_object+0x160/0x250 [ 79.405299][ T9445] report_bug+0x27b/0x2f0 [ 79.409618][ T9445] do_error_trap+0x12b/0x220 [ 79.414191][ T9445] ? debug_print_object+0x160/0x250 [ 79.419377][ T9445] do_invalid_op+0x32/0x40 [ 79.423771][ T9445] ? debug_print_object+0x160/0x250 [ 79.428946][ T9445] invalid_op+0x23/0x30 [ 79.433104][ T9445] RIP: 0010:debug_print_object+0x160/0x250 [ 79.439030][ T9445] Code: dd c0 fa 71 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd c0 fa 71 88 48 c7 c7 20 f0 71 88 e8 a8 bd b1 fd <0f> 0b 83 05 4b ef f3 06 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 79.459054][ T9445] RSP: 0018:ffffc90001f27178 EFLAGS: 00010282 [ 79.465117][ T9445] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 79.473066][ T9445] RDX: 0000000000000000 RSI: ffffffff815bfe61 RDI: fffff520003e4e21 [ 79.481020][ T9445] RBP: 0000000000000001 R08: ffff8880a41664c0 R09: fffffbfff1851378 [ 79.488969][ T9445] R10: fffffbfff1851377 R11: ffffffff8c289bbf R12: ffffffff899acba0 [ 79.496926][ T9445] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920003e4e3c [ 79.505248][ T9445] ? vprintk_func+0x81/0x17e [ 79.509834][ T9445] ? debug_print_object+0x160/0x250 [ 79.515020][ T9445] ? lockdep_hardirqs_on+0x417/0x5d0 [ 79.520311][ T9445] debug_object_activate+0x346/0x470 [ 79.525584][ T9445] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 79.531396][ T9445] ? debug_object_init_on_stack+0x20/0x20 [ 79.537181][ T9445] ? find_held_lock+0x2d/0x110 [ 79.541927][ T9445] ? free_object+0x70/0x70 [ 79.546329][ T9445] ? lock_downgrade+0x7f0/0x7f0 [ 79.551159][ T9445] ? delayed_work_timer_fn+0x90/0x90 [ 79.556422][ T9445] call_rcu+0x2c/0x690 [ 79.560469][ T9445] queue_rcu_work+0x82/0xa0 [ 79.564948][ T9445] route4_change+0x19e8/0x2250 [ 79.569704][ T9445] ? route4_destroy+0x800/0x800 [ 79.574532][ T9445] ? wait_for_completion+0x3c0/0x3c0 [ 79.579794][ T9445] tc_new_tfilter+0xa59/0x20b0 [ 79.584610][ T9445] ? route4_destroy+0x800/0x800 [ 79.589450][ T9445] ? tc_del_tfilter+0x1430/0x1430 [ 79.594558][ T9445] ? __lock_acquire+0x80b/0x3ca0 [ 79.599491][ T9445] ? apparmor_capable+0x454/0x8a0 [ 79.604524][ T9445] ? rcu_read_lock_held+0x9c/0xb0 [ 79.609534][ T9445] ? tc_del_tfilter+0x1430/0x1430 [ 79.614550][ T9445] rtnetlink_rcv_msg+0x810/0xad0 [ 79.619482][ T9445] ? rtnl_bridge_getlink+0x870/0x870 [ 79.624750][ T9445] ? mark_held_locks+0xe0/0xe0 [ 79.629603][ T9445] ? netlink_deliver_tap+0x146/0xb50 [ 79.634869][ T9445] netlink_rcv_skb+0x15a/0x410 [ 79.639610][ T9445] ? rtnl_bridge_getlink+0x870/0x870 [ 79.644959][ T9445] ? netlink_ack+0xa80/0xa80 [ 79.649535][ T9445] netlink_unicast+0x537/0x740 [ 79.654280][ T9445] ? netlink_attachskb+0x810/0x810 [ 79.659369][ T9445] ? _copy_from_iter_full+0x25c/0x870 [ 79.664719][ T9445] ? __phys_addr_symbol+0x2c/0x70 [ 79.669718][ T9445] ? __check_object_size+0x171/0x437 [ 79.674994][ T9445] netlink_sendmsg+0x882/0xe10 [ 79.679744][ T9445] ? aa_af_perm+0x260/0x260 [ 79.684223][ T9445] ? netlink_unicast+0x740/0x740 [ 79.689151][ T9445] ? netlink_unicast+0x740/0x740 [ 79.694081][ T9445] sock_sendmsg+0xcf/0x120 [ 79.698476][ T9445] ____sys_sendmsg+0x6b9/0x7d0 [ 79.703222][ T9445] ? kernel_sendmsg+0x50/0x50 [ 79.707890][ T9445] ___sys_sendmsg+0x100/0x170 [ 79.712545][ T9445] ? sendmsg_copy_msghdr+0x70/0x70 [ 79.717647][ T9445] ? __fget_files+0x329/0x4f0 [ 79.722368][ T9445] ? ksys_dup3+0x3c0/0x3c0 [ 79.726782][ T9445] ? __fget_light+0x208/0x270 [ 79.731450][ T9445] __sys_sendmsg+0xec/0x1b0 [ 79.735948][ T9445] ? __sys_sendmsg_sock+0xb0/0xb0 [ 79.740963][ T9445] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 79.746925][ T9445] ? __x64_sys_futex+0x380/0x4f0 [ 79.751859][ T9445] ? trace_hardirqs_off_caller+0x55/0x230 [ 79.757563][ T9445] ? do_syscall_64+0x21/0x7d0 [ 79.762285][ T9445] do_syscall_64+0xf6/0x7d0 [ 79.766866][ T9445] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 79.772737][ T9445] RIP: 0033:0x4466c9 [ 79.776630][ T9445] Code: e8 1c ba 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 ab 0e fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 79.796224][ T9445] RSP: 002b:00007f6c2a674d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 79.804622][ T9445] RAX: ffffffffffffffda RBX: 00000000006dbc68 RCX: 00000000004466c9 [ 79.812750][ T9445] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000003 [ 79.820878][ T9445] RBP: 00000000006dbc60 R08: 0000000000000000 R09: 0000000000000000 [ 79.829390][ T9445] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc6c [ 79.837349][ T9445] R13: 0000000000000005 R14: 00a3a20740000000 R15: 0507002400000038 [ 79.846968][ T9445] Kernel Offset: disabled [ 79.851350][ T9445] Rebooting in 86400 seconds..