[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 38.555424] audit: type=1800 audit(1568516074.039:33): pid=7353 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2465 res=0 [ 38.579161] audit: type=1800 audit(1568516074.039:34): pid=7353 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2456 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 41.211132] audit: type=1400 audit(1568516076.699:35): avc: denied { map } for pid=7526 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.208' (ECDSA) to the list of known hosts. [ 232.410240] audit: type=1400 audit(1568516267.899:36): avc: denied { map } for pid=7538 comm="syz-executor655" path="/root/syz-executor655844472" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 232.431384] IPVS: ftp: loaded support on port[0] = 21 [ 232.487179] chnl_net:caif_netlink_parms(): no params data found [ 232.518566] bridge0: port 1(bridge_slave_0) entered blocking state [ 232.525255] bridge0: port 1(bridge_slave_0) entered disabled state [ 232.532375] device bridge_slave_0 entered promiscuous mode [ 232.539650] bridge0: port 2(bridge_slave_1) entered blocking state [ 232.546017] bridge0: port 2(bridge_slave_1) entered disabled state [ 232.553179] device bridge_slave_1 entered promiscuous mode [ 232.567438] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 232.577230] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 232.593433] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 232.600980] team0: Port device team_slave_0 added [ 232.606363] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 232.613666] team0: Port device team_slave_1 added [ 232.618818] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 232.626172] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 232.691435] device hsr_slave_0 entered promiscuous mode [ 232.759171] device hsr_slave_1 entered promiscuous mode [ 232.819454] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 232.826557] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 232.840630] bridge0: port 2(bridge_slave_1) entered blocking state [ 232.847059] bridge0: port 2(bridge_slave_1) entered forwarding state [ 232.854007] bridge0: port 1(bridge_slave_0) entered blocking state [ 232.860398] bridge0: port 1(bridge_slave_0) entered forwarding state [ 232.891412] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 232.897505] 8021q: adding VLAN 0 to HW filter on device bond0 [ 232.905925] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 232.914763] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 232.934150] bridge0: port 1(bridge_slave_0) entered disabled state [ 232.941398] bridge0: port 2(bridge_slave_1) entered disabled state [ 232.948372] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 232.959031] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 232.965113] 8021q: adding VLAN 0 to HW filter on device team0 [ 232.974895] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 232.983383] bridge0: port 1(bridge_slave_0) entered blocking state [ 232.989777] bridge0: port 1(bridge_slave_0) entered forwarding state [ 233.010953] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 233.018537] bridge0: port 2(bridge_slave_1) entered blocking state [ 233.024951] bridge0: port 2(bridge_slave_1) entered forwarding state [ 233.033046] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 233.040815] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 233.048360] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 233.056282] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 233.064392] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 233.072493] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 233.078589] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 233.092694] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 233.103892] 8021q: adding VLAN 0 to HW filter on device batadv0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 338.188886] rcu: INFO: rcu_preempt self-detected stall on CPU [ 338.194996] rcu: 0-...!: (10500 ticks this GP) idle=fbe/1/0x4000000000000004 softirq=10547/10547 fqs=0 [ 338.204765] rcu: (t=10500 jiffies g=5145 q=301) [ 338.209605] rcu: rcu_preempt kthread starved for 10500 jiffies! g5145 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 [ 338.220154] rcu: RCU grace-period kthread stack dump: [ 338.225320] rcu_preempt I29104 10 2 0x80000000 [ 338.230940] Call Trace: [ 338.233583] __schedule+0x866/0x1dc0 [ 338.237286] ? pci_mmcfg_check_reserved+0x170/0x170 [ 338.242286] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 338.247417] ? lockdep_hardirqs_on+0x415/0x5d0 [ 338.252014] ? trace_hardirqs_on+0x67/0x220 [ 338.256321] schedule+0x92/0x1c0 [ 338.259672] schedule_timeout+0x4db/0xfc0 [ 338.263802] ? usleep_range+0x170/0x170 [ 338.267758] ? trace_hardirqs_on+0x67/0x220 [ 338.272095] ? kasan_check_read+0x11/0x20 [ 338.276248] ? __next_timer_interrupt+0x1a0/0x1a0 [ 338.281098] ? prepare_to_swait_exclusive+0x120/0x120 [ 338.286297] rcu_gp_kthread+0xd5c/0x2190 [ 338.290353] ? rcu_blocking_is_gp+0x90/0x90 [ 338.296654] ? trace_hardirqs_on+0x67/0x220 [ 338.300972] ? kasan_check_read+0x11/0x20 [ 338.305366] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 338.310480] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 338.316044] ? __kthread_parkme+0xfb/0x1b0 [ 338.320265] kthread+0x354/0x420 [ 338.323614] ? rcu_blocking_is_gp+0x90/0x90 [ 338.327928] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 338.333448] ret_from_fork+0x24/0x30 [ 338.337175] NMI backtrace for cpu 0 [ 338.340795] CPU: 0 PID: 7572 Comm: syz-executor655 Not tainted 4.19.72 #0 [ 338.347704] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 338.357127] Call Trace: [ 338.359694] [ 338.361865] dump_stack+0x172/0x1f0 [ 338.365487] nmi_cpu_backtrace.cold+0x63/0xa4 [ 338.370003] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 338.374934] nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 [ 338.380197] arch_trigger_cpumask_backtrace+0x14/0x20 [ 338.385376] rcu_dump_cpu_stacks+0x189/0x1d5 [ 338.389799] ? wake_up_process+0x10/0x20 [ 338.393855] rcu_check_callbacks.cold+0x5e3/0xd90 [ 338.398687] ? trace_hardirqs_off+0x62/0x220 [ 338.403134] update_process_times+0x32/0x80 [ 338.407463] tick_sched_handle+0xa2/0x190 [ 338.411602] tick_sched_timer+0x47/0x130 [ 338.415652] __hrtimer_run_queues+0x33b/0xdc0 [ 338.420137] ? tick_sched_do_timer+0x1b0/0x1b0 [ 338.424709] ? hrtimer_fixup_activate+0x30/0x30 [ 338.429365] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 338.434367] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 338.439734] hrtimer_interrupt+0x314/0x770 [ 338.443979] smp_apic_timer_interrupt+0x111/0x550 [ 338.448813] apic_timer_interrupt+0xf/0x20 [ 338.453036] RIP: 0010:__sanitizer_cov_trace_pc+0x1/0x50 [ 338.458392] Code: bc f4 ff ff ff e8 33 66 ea ff 48 c7 05 44 22 cd 08 00 00 00 00 e9 ca e9 ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 <48> 89 e5 48 8b 75 08 65 48 8b 04 25 40 ee 01 00 65 8b 15 28 97 96 [ 338.477280] RSP: 0000:ffff8880ae806fb8 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff13 [ 338.484975] RAX: ffff888088c3dda8 RBX: ffff888088c3ddb8 RCX: ffffffff858e78e9 [ 338.492234] RDX: ffff888088c3dd80 RSI: ffffffff858e7d4c RDI: 0000000000000005 [ 338.499490] RBP: ffff8880ae807018 R08: ffff888078d7c280 R09: 0000000000000008 [ 338.506745] R10: ffff888078d7cc40 R11: 00000000f99cb6a6 R12: dffffc0000000000 [ 338.513999] R13: ffff888088c3db00 R14: 0000000000000001 R15: 0000000000000000 [ 338.521262] ? apic_timer_interrupt+0xa/0x20 [ 338.525722] ? hhf_dequeue+0xb9/0xa00 [ 338.529509] ? hhf_dequeue+0x51c/0xa00 [ 338.533388] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 338.538915] ? hhf_dequeue+0x537/0xa00 [ 338.542850] __qdisc_run+0x1e7/0x1960 [ 338.546692] __dev_queue_xmit+0x165c/0x2fe0 [ 338.551007] ? netdev_pick_tx+0x300/0x300 [ 338.555144] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 338.560717] ? br_nf_post_routing+0x780/0x12f0 [ 338.565311] ? br_forward_finish+0x235/0x400 [ 338.569711] ? find_held_lock+0x35/0x130 [ 338.573760] ? br_forward_finish+0x235/0x400 [ 338.578179] dev_queue_xmit+0x18/0x20 [ 338.581979] ? dev_queue_xmit+0x18/0x20 [ 338.585942] br_dev_queue_push_xmit+0x405/0x5d0 [ 338.590601] ? kasan_check_read+0x11/0x20 [ 338.594740] br_forward_finish+0xfa/0x400 [ 338.598894] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 338.603728] ? br_fdb_add.cold+0x8a/0x8a [ 338.607780] ? kasan_check_read+0x11/0x20 [ 338.611918] __br_forward+0x647/0xb30 [ 338.615707] ? br_forward_finish+0x400/0x400 [ 338.620105] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 338.624942] deliver_clone+0x61/0xc0 [ 338.628645] br_flood+0x4da/0x710 [ 338.632094] br_dev_xmit+0xeeb/0x1490 [ 338.635890] ? br_poll_controller+0x10/0x10 [ 338.640201] ? __lock_is_held+0xb6/0x140 [ 338.644258] dev_hard_start_xmit+0x1a5/0x980 [ 338.648720] ? check_preemption_disabled+0x48/0x290 [ 338.653728] __dev_queue_xmit+0x2704/0x2fe0 [ 338.658034] ? mark_held_locks+0x100/0x100 [ 338.662262] ? netdev_pick_tx+0x300/0x300 [ 338.666502] ? ip6_finish_output+0x574/0xbe0 [ 338.670912] ? find_held_lock+0x35/0x130 [ 338.675083] ? ip6_finish_output+0x574/0xbe0 [ 338.679489] ? mark_held_locks+0xb1/0x100 [ 338.683632] ? ip6_finish_output2+0x1784/0x2550 [ 338.688297] ? ip6_finish_output+0x574/0xbe0 [ 338.692724] ? ip6_finish_output2+0x1784/0x2550 [ 338.697395] dev_queue_xmit+0x18/0x20 [ 338.701300] ? dev_queue_xmit+0x18/0x20 [ 338.705295] ip6_finish_output2+0x12fd/0x2550 [ 338.709860] ? ip6_mtu+0x2e6/0x460 [ 338.713399] ? ip6_forward_finish+0x4d0/0x4d0 [ 338.717884] ? lock_downgrade+0x810/0x810 [ 338.722029] ? kasan_check_read+0x11/0x20 [ 338.726196] ip6_finish_output+0x574/0xbe0 [ 338.730429] ? ip6_finish_output+0x574/0xbe0 [ 338.734836] ip6_output+0x235/0x7c0 [ 338.738458] ? ip6_finish_output+0xbe0/0xbe0 [ 338.742887] ? ip6_fragment+0x3770/0x3770 [ 338.747031] ? icmp6_dst_alloc+0x432/0x660 [ 338.751313] mld_sendpack+0x9d3/0xeb0 [ 338.755113] ? nf_hook.constprop.0+0x560/0x560 [ 338.759695] ? mld_ifc_timer_expire+0x437/0x8a0 [ 338.764412] ? __local_bh_enable_ip+0x15a/0x270 [ 338.769096] mld_ifc_timer_expire+0x449/0x8a0 [ 338.773609] call_timer_fn+0x18d/0x720 [ 338.777484] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 338.782140] ? process_timeout+0x40/0x40 [ 338.786188] ? run_timer_softirq+0x647/0x1700 [ 338.790676] ? trace_hardirqs_on+0x67/0x220 [ 338.794986] ? kasan_check_read+0x11/0x20 [ 338.799122] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 338.803784] run_timer_softirq+0x652/0x1700 [ 338.808100] ? add_timer+0xbe0/0xbe0 [ 338.811823] ? __lock_is_held+0xb6/0x140 [ 338.815891] __do_softirq+0x25c/0x921 [ 338.819681] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 338.825217] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 338.830748] irq_exit+0x180/0x1d0 [ 338.834196] smp_apic_timer_interrupt+0x13b/0x550 [ 338.839028] apic_timer_interrupt+0xf/0x20 [ 338.843246] [ 338.845481] RIP: 0010:clear_page_erms+0x7/0x10 [ 338.850052] Code: 48 89 47 18 48 89 47 20 48 89 47 28 48 89 47 30 48 89 47 38 48 8d 7f 40 75 d9 90 c3 0f 1f 80 00 00 00 00 b9 00 10 00 00 31 c0 aa c3 90 90 90 90 90 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 [ 338.868952] RSP: 0000:ffff8880981cfb10 EFLAGS: 00010246 ORIG_RAX: ffffffffffffff13 [ 338.876672] RAX: 0000000000000000 RBX: ffff888000000000 RCX: 0000000000000f80 [ 338.883934] RDX: 1ffff1100f1afab5 RSI: ffffffff81944d66 RDI: ffff8880868e8080 [ 338.891197] RBP: ffff8880981cfb28 R08: ffff888078d7c280 R09: 0000000000000000 [ 338.898456] R10: ffffed1015d04732 R11: ffff8880ae823993 R12: ffff888078d7c280 [ 338.905714] R13: 00000000000000e8 R14: 0000000000000000 R15: 0000000000000000 [ 338.913117] ? clear_subpage+0x16/0x110 [ 338.917094] ? clear_subpage+0x85/0x110 [ 338.921055] clear_huge_page+0xb5/0x4d0 [ 338.925302] do_huge_pmd_anonymous_page+0x757/0x14e0 [ 338.930397] ? __thp_get_unmapped_area+0x190/0x190 [ 338.935323] __handle_mm_fault+0x2c80/0x3f80 [ 338.939735] ? vmf_insert_mixed_mkwrite+0x90/0x90 [ 338.944577] ? count_memcg_event_mm+0x2b1/0x4d0 [ 338.949243] handle_mm_fault+0x1b5/0x690 [ 338.953350] __do_page_fault+0x62a/0xe90 [ 338.957405] ? vmalloc_fault+0x740/0x740 [ 338.961455] ? trace_hardirqs_off_caller+0x65/0x220 [ 338.966458] ? trace_hardirqs_on_caller+0x6a/0x220 [ 338.971376] ? page_fault+0x8/0x30 [ 338.974904] do_page_fault+0x71/0x57d [ 338.978694] ? page_fault+0x8/0x30 [ 338.982221] page_fault+0x1e/0x30 [ 338.985659] RIP: 0033:0x401a4f [ 338.988859] Code: bf 29 00 00 00 e8 51 09 04 00 48 83 f8 ff 74 07 48 89 05 5c 16 2d 00 48 8b 05 9d 7a 0a 00 48 8b 35 4e 16 2d 00 b9 00 06 00 20 04 25 10 06 00 20 00 00 00 00 ba 33 89 00 00 bf 10 00 00 00 48 [ 339.007767] RSP: 002b:00007ffd5d6ca070 EFLAGS: 00010217 [ 339.013123] RAX: 735f656764697262 RBX: 0000000000000000 RCX: 0000000020000600 [ 339.020379] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000002 [ 339.027635] RBP: 0000000000038ed0 R08: 0000000000000000 R09: 0000000000000000 [ 339.034892] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000000 [ 339.042148] R13: 00000000004032f0 R14: 0000000000000000 R15: 0000000000000000