[ 72.212711][ T28] audit: type=1800 audit(1581901495.411:26): pid=9753 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 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.
[ 73.131801][ T28] kauditd_printk_skb: 2 callbacks suppressed
[ 73.131814][ T28] audit: type=1800 audit(1581901496.351:29): pid=9753 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0
[ 73.159476][ T28] audit: type=1800 audit(1581901496.361:30): pid=9753 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0
Debian GNU/Linux 7 syzkaller ttyS0
Warning: Permanently added '10.128.0.84' (ECDSA) to the list of known hosts.
syzkaller login: [ 80.224960][ T9906] IPVS: ftp: loaded support on port[0] = 21
[ 80.276313][ T9906] chnl_net:caif_netlink_parms(): no params data found
[ 80.326606][ T9906] bridge0: port 1(bridge_slave_0) entered blocking state
[ 80.334536][ T9906] bridge0: port 1(bridge_slave_0) entered disabled state
[ 80.343859][ T9906] device bridge_slave_0 entered promiscuous mode
[ 80.353047][ T9906] bridge0: port 2(bridge_slave_1) entered blocking state
[ 80.361045][ T9906] bridge0: port 2(bridge_slave_1) entered disabled state
[ 80.369480][ T9906] device bridge_slave_1 entered promiscuous mode
[ 80.387973][ T9906] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[ 80.399479][ T9906] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[ 80.419255][ T9906] team0: Port device team_slave_0 added
[ 80.427674][ T9906] team0: Port device team_slave_1 added
[ 80.442843][ T9906] batman_adv: batadv0: Adding interface: batadv_slave_0
[ 80.450339][ T9906] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem.
[ 80.479360][ T9906] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[ 80.494242][ T9906] batman_adv: batadv0: Adding interface: batadv_slave_1
[ 80.501778][ T9906] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem.
[ 80.529816][ T9906] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[ 80.604468][ T9906] device hsr_slave_0 entered promiscuous mode
[ 80.653447][ T9906] device hsr_slave_1 entered promiscuous mode
[ 80.776961][ T9906] netdevsim netdevsim0 netdevsim0: renamed from eth0
[ 80.826615][ T9906] netdevsim netdevsim0 netdevsim1: renamed from eth1
[ 80.884732][ T9906] netdevsim netdevsim0 netdevsim2: renamed from eth2
[ 80.915689][ T9906] netdevsim netdevsim0 netdevsim3: renamed from eth3
[ 80.988175][ T9906] bridge0: port 2(bridge_slave_1) entered blocking state
[ 80.996035][ T9906] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 81.004485][ T9906] bridge0: port 1(bridge_slave_0) entered blocking state
[ 81.012668][ T9906] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 81.057891][ T9906] 8021q: adding VLAN 0 to HW filter on device bond0
[ 81.072381][ T2722] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[ 81.083826][ T2722] bridge0: port 1(bridge_slave_0) entered disabled state
[ 81.094183][ T2722] bridge0: port 2(bridge_slave_1) entered disabled state
[ 81.104047][ T2722] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready
[ 81.118610][ T9906] 8021q: adding VLAN 0 to HW filter on device team0
[ 81.130224][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready
[ 81.139929][ T5] bridge0: port 1(bridge_slave_0) entered blocking state
[ 81.147951][ T5] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 81.160558][ T2722] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready
[ 81.171019][ T2722] bridge0: port 2(bridge_slave_1) entered blocking state
[ 81.179026][ T2722] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 81.204124][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready
[ 81.213642][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready
[ 81.229372][ T9906] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network
[ 81.241745][ T9906] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network
[ 81.255826][ T2698] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready
[ 81.264652][ T2698] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready
[ 81.273486][ T2698] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready
[ 81.285173][ T2698] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready
[ 81.301820][ T2722] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready
[ 81.309740][ T2722] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready
[ 81.324745][ T9906] 8021q: adding VLAN 0 to HW filter on device batadv0
[ 81.343958][ T2698] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready
[ 81.353446][ T2698] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready
[ 81.377270][ T2722] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready
[ 81.385899][ T2722] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready
[ 81.395537][ T2722] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready
[ 81.403450][ T2722] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready
[ 81.414131][ T9906] device veth0_vlan entered promiscuous mode
[ 81.425996][ T9906] device veth1_vlan entered promiscuous mode
[ 81.447255][ T2722] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready
[ 81.455857][ T2722] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready
[ 81.464194][ T2722] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready
[ 81.473140][ T2722] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready
[ 81.485764][ T9906] device veth0_macvtap entered promiscuous mode
[ 81.497290][ T9906] device veth1_macvtap entered promiscuous mode
[ 81.513659][ T9906] batman_adv: batadv0: Interface activated: batadv_slave_0
[ 81.521280][ T2698] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready
[ 81.531087][ T2698] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready
[ 81.539366][ T2698] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready
[ 81.548280][ T2698] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready
[ 81.560201][ T9906] batman_adv: batadv0: Interface activated: batadv_slave_1
[ 81.567882][ T2722] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready
[ 81.577398][ T2722] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready
executing program
[ 81.772965][ C1] ==================================================================
[ 81.781669][ C1] BUG: KASAN: use-after-free in mld_in_v1_mode+0x203/0x230
[ 81.788855][ C1] Read of size 8 at addr ffff88809c3a0588 by task swapper/1/0
[ 81.796297][ C1]
[ 81.798619][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.6.0-rc2-syzkaller #0
[ 81.806503][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 81.816606][ C1] Call Trace:
[ 81.819905][ C1]
[ 81.822767][ C1] dump_stack+0x197/0x210
[ 81.827105][ C1] ? mld_in_v1_mode+0x203/0x230
[ 81.831955][ C1] print_address_description.constprop.0.cold+0xd4/0x30b
[ 81.838971][ C1] ? mld_in_v1_mode+0x203/0x230
[ 81.843821][ C1] ? mld_in_v1_mode+0x203/0x230
[ 81.848679][ C1] __kasan_report.cold+0x1b/0x32
[ 81.853642][ C1] ? mld_in_v1_mode+0x203/0x230
[ 81.858496][ C1] kasan_report+0x12/0x20
[ 81.862978][ C1] __asan_report_load8_noabort+0x14/0x20
[ 81.868724][ C1] mld_in_v1_mode+0x203/0x230
[ 81.873486][ C1] mld_dad_timer_expire+0x24/0x230
[ 81.878611][ C1] call_timer_fn+0x1ac/0x780
[ 81.883204][ C1] ? mld_send_initial_cr.part.0+0x160/0x160
[ 81.889279][ C1] ? msleep_interruptible+0x150/0x150
[ 81.894745][ C1] ? run_timer_softirq+0x6b1/0x1790
[ 81.899959][ C1] ? trace_hardirqs_on+0x67/0x240
[ 81.905007][ C1] ? mld_send_initial_cr.part.0+0x160/0x160
[ 81.910899][ C1] ? mld_send_initial_cr.part.0+0x160/0x160
[ 81.916844][ C1] run_timer_softirq+0x6c3/0x1790
[ 81.922129][ C1] ? add_timer+0x930/0x930
[ 81.926599][ C1] ? rcu_lockdep_current_cpu_online+0xe3/0x130
[ 81.932763][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0
[ 81.938313][ C1] ? rcu_read_lock_any_held.part.0+0x50/0x50
[ 81.944291][ C1] ? trace_hardirqs_on+0x67/0x240
[ 81.949318][ C1] __do_softirq+0x262/0x98c
[ 81.953882][ C1] ? sched_clock_cpu+0x1b/0x1b0
[ 81.958734][ C1] irq_exit+0x19b/0x1e0
[ 81.962900][ C1] smp_apic_timer_interrupt+0x1a3/0x610
[ 81.968469][ C1] apic_timer_interrupt+0xf/0x20
[ 81.973495][ C1]
[ 81.976446][ C1] RIP: 0010:native_safe_halt+0xe/0x10
[ 81.981949][ C1] Code: 08 f2 c4 f9 eb 8a cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d 04 3a 59 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d f4 39 59 00 fb f4 cc 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 7e a9 73 f9 e8 19
[ 82.001636][ C1] RSP: 0018:ffffc90000d3fd68 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 82.010053][ C1] RAX: 1ffffffff136761a RBX: ffff8880a99fc340 RCX: 0000000000000000
[ 82.018191][ C1] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffff8880a99fcbd4
[ 82.026248][ C1] RBP: ffffc90000d3fd98 R08: ffff8880a99fc340 R09: 0000000000000000
[ 82.035332][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
[ 82.043411][ C1] R13: ffffffff8aa5a680 R14: 0000000000000000 R15: 0000000000000001
[ 82.051417][ C1] ? default_idle+0x4e/0x360
[ 82.056142][ C1] arch_cpu_idle+0xa/0x10
[ 82.060586][ C1] default_idle_call+0x84/0xb0
[ 82.065347][ C1] do_idle+0x3c8/0x6e0
[ 82.069406][ C1] ? retint_kernel+0x2b/0x2b
[ 82.074106][ C1] ? arch_cpu_idle_exit+0x80/0x80
[ 82.079266][ C1] ? do_idle+0x6/0x6e0
[ 82.083476][ C1] cpu_startup_entry+0x1b/0x20
[ 82.088259][ C1] start_secondary+0x2f4/0x410
[ 82.093041][ C1] ? set_cpu_sibling_map+0x2140/0x2140
[ 82.098566][ C1] secondary_startup_64+0xa4/0xb0
[ 82.103614][ C1]
[ 82.105933][ C1] Allocated by task 9906:
[ 82.110263][ C1] save_stack+0x23/0x90
[ 82.114430][ C1] __kasan_kmalloc.constprop.0+0xcf/0xe0
[ 82.120057][ C1] kasan_kmalloc+0x9/0x10
[ 82.124375][ C1] __kmalloc_node+0x4e/0x70
[ 82.128896][ C1] kvmalloc_node+0x68/0x100
[ 82.133447][ C1] alloc_netdev_mqs+0x98/0xe40
[ 82.138209][ C1] vti6_init_net+0x244/0x810
[ 82.144002][ C1] ops_init+0xb3/0x420
[ 82.148061][ C1] setup_net+0x2d5/0x8b0
[ 82.152284][ C1] copy_net_ns+0x29e/0x5a0
[ 82.156800][ C1] create_new_namespaces+0x403/0xb50
[ 82.162075][ C1] unshare_nsproxy_namespaces+0xc2/0x200
[ 82.168327][ C1] ksys_unshare+0x444/0x980
[ 82.172839][ C1] __x64_sys_unshare+0x31/0x40
[ 82.177746][ C1] do_syscall_64+0xfa/0x790
[ 82.182241][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 82.188233][ C1]
[ 82.190546][ C1] Freed by task 9906:
[ 82.194569][ C1] save_stack+0x23/0x90
[ 82.198724][ C1] __kasan_slab_free+0x102/0x150
[ 82.203655][ C1] kasan_slab_free+0xe/0x10
[ 82.208199][ C1] kfree+0x10a/0x2c0
[ 82.212222][ C1] __netdev_name_node_alt_destroy+0x1ff/0x2a0
[ 82.218280][ C1] netdev_name_node_alt_destroy+0x57/0x80
[ 82.224025][ C1] rtnl_linkprop.isra.0+0x575/0x6f0
[ 82.229212][ C1] rtnl_dellinkprop+0x46/0x60
[ 82.233882][ C1] rtnetlink_rcv_msg+0x45e/0xaf0
[ 82.238809][ C1] netlink_rcv_skb+0x177/0x450
[ 82.243587][ C1] rtnetlink_rcv+0x1d/0x30
[ 82.248130][ C1] netlink_unicast+0x59e/0x7e0
[ 82.252890][ C1] netlink_sendmsg+0x91c/0xea0
[ 82.257649][ C1] sock_sendmsg+0xd7/0x130
[ 82.262143][ C1] ____sys_sendmsg+0x753/0x880
[ 82.266897][ C1] ___sys_sendmsg+0x100/0x170
[ 82.271566][ C1] __sys_sendmsg+0x105/0x1d0
[ 82.276162][ C1] __x64_sys_sendmsg+0x78/0xb0
[ 82.280917][ C1] do_syscall_64+0xfa/0x790
[ 82.285416][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 82.291289][ C1]
[ 82.293610][ C1] The buggy address belongs to the object at ffff88809c3a0000
[ 82.293610][ C1] which belongs to the cache kmalloc-4k of size 4096
[ 82.307705][ C1] The buggy address is located 1416 bytes inside of
[ 82.307705][ C1] 4096-byte region [ffff88809c3a0000, ffff88809c3a1000)
[ 82.321231][ C1] The buggy address belongs to the page:
[ 82.326982][ C1] page:ffffea000270e800 refcount:1 mapcount:0 mapping:ffff8880aa402000 index:0x0 compound_mapcount: 0
[ 82.338077][ C1] flags: 0xfffe0000010200(slab|head)
[ 82.343357][ C1] raw: 00fffe0000010200 ffffea00027d5808 ffffea0002a48188 ffff8880aa402000
[ 82.351944][ C1] raw: 0000000000000000 ffff88809c3a0000 0000000100000001 0000000000000000
[ 82.360742][ C1] page dumped because: kasan: bad access detected
[ 82.367146][ C1]
[ 82.369456][ C1] Memory state around the buggy address:
[ 82.375067][ C1] ffff88809c3a0480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 82.383117][ C1] ffff88809c3a0500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 82.391167][ C1] >ffff88809c3a0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 82.399214][ C1] ^
[ 82.403541][ C1] ffff88809c3a0600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 82.411612][ C1] ffff88809c3a0680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 82.419685][ C1] ==================================================================
[ 82.427736][ C1] Disabling lock debugging due to kernel taint
[ 82.433971][ C1] Kernel panic - not syncing: panic_on_warn set ...
[ 82.440551][ C1] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G B 5.6.0-rc2-syzkaller #0
[ 82.449811][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 82.459853][ C1] Call Trace:
[ 82.463121][ C1]
[ 82.466057][ C1] dump_stack+0x197/0x210
[ 82.470403][ C1] panic+0x2e3/0x75c
[ 82.474293][ C1] ? add_taint.cold+0x16/0x16
[ 82.478977][ C1] ? trace_hardirqs_on+0x5e/0x240
[ 82.483991][ C1] ? trace_hardirqs_on+0x5e/0x240
[ 82.489124][ C1] ? mld_in_v1_mode+0x203/0x230
[ 82.493958][ C1] end_report+0x47/0x4f
[ 82.498136][ C1] ? mld_in_v1_mode+0x203/0x230
[ 82.502974][ C1] __kasan_report.cold+0xe/0x32
[ 82.507846][ C1] ? mld_in_v1_mode+0x203/0x230
[ 82.512720][ C1] kasan_report+0x12/0x20
[ 82.517052][ C1] __asan_report_load8_noabort+0x14/0x20
[ 82.522844][ C1] mld_in_v1_mode+0x203/0x230
[ 82.527527][ C1] mld_dad_timer_expire+0x24/0x230
[ 82.532637][ C1] call_timer_fn+0x1ac/0x780
[ 82.537229][ C1] ? mld_send_initial_cr.part.0+0x160/0x160
[ 82.543112][ C1] ? msleep_interruptible+0x150/0x150
[ 82.548468][ C1] ? run_timer_softirq+0x6b1/0x1790
[ 82.553746][ C1] ? trace_hardirqs_on+0x67/0x240
[ 82.558764][ C1] ? mld_send_initial_cr.part.0+0x160/0x160
[ 82.564658][ C1] ? mld_send_initial_cr.part.0+0x160/0x160
[ 82.570535][ C1] run_timer_softirq+0x6c3/0x1790
[ 82.575556][ C1] ? add_timer+0x930/0x930
[ 82.579961][ C1] ? rcu_lockdep_current_cpu_online+0xe3/0x130
[ 82.586159][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0
[ 82.592005][ C1] ? rcu_read_lock_any_held.part.0+0x50/0x50
[ 82.598000][ C1] ? trace_hardirqs_on+0x67/0x240
[ 82.603013][ C1] __do_softirq+0x262/0x98c
[ 82.607497][ C1] ? sched_clock_cpu+0x1b/0x1b0
[ 82.612344][ C1] irq_exit+0x19b/0x1e0
[ 82.616520][ C1] smp_apic_timer_interrupt+0x1a3/0x610
[ 82.622154][ C1] apic_timer_interrupt+0xf/0x20
[ 82.627149][ C1]
[ 82.630158][ C1] RIP: 0010:native_safe_halt+0xe/0x10
[ 82.635567][ C1] Code: 08 f2 c4 f9 eb 8a cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d 04 3a 59 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d f4 39 59 00 fb f4 cc 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 7e a9 73 f9 e8 19
[ 82.655335][ C1] RSP: 0018:ffffc90000d3fd68 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 82.663732][ C1] RAX: 1ffffffff136761a RBX: ffff8880a99fc340 RCX: 0000000000000000
[ 82.671696][ C1] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffff8880a99fcbd4
[ 82.679659][ C1] RBP: ffffc90000d3fd98 R08: ffff8880a99fc340 R09: 0000000000000000
[ 82.687620][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
[ 82.695596][ C1] R13: ffffffff8aa5a680 R14: 0000000000000000 R15: 0000000000000001
[ 82.703574][ C1] ? default_idle+0x4e/0x360
[ 82.708160][ C1] arch_cpu_idle+0xa/0x10
[ 82.712489][ C1] default_idle_call+0x84/0xb0
[ 82.717247][ C1] do_idle+0x3c8/0x6e0
[ 82.721413][ C1] ? retint_kernel+0x2b/0x2b
[ 82.726014][ C1] ? arch_cpu_idle_exit+0x80/0x80
[ 82.732036][ C1] ? do_idle+0x6/0x6e0
[ 82.736101][ C1] cpu_startup_entry+0x1b/0x20
[ 82.740876][ C1] start_secondary+0x2f4/0x410
[ 82.745644][ C1] ? set_cpu_sibling_map+0x2140/0x2140
[ 82.751109][ C1] secondary_startup_64+0xa4/0xb0
[ 82.757832][ C1] Kernel Offset: disabled
[ 82.762206][ C1] Rebooting in 86400 seconds..