[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.113' (ECDSA) to the list of known hosts. syzkaller login: [ 68.945687][ T6808] IPVS: ftp: loaded support on port[0] = 21 [ 69.036030][ T6808] chnl_net:caif_netlink_parms(): no params data found [ 69.089742][ T6808] bridge0: port 1(bridge_slave_0) entered blocking state [ 69.098676][ T6808] bridge0: port 1(bridge_slave_0) entered disabled state [ 69.107337][ T6808] device bridge_slave_0 entered promiscuous mode [ 69.117028][ T6808] bridge0: port 2(bridge_slave_1) entered blocking state [ 69.124626][ T6808] bridge0: port 2(bridge_slave_1) entered disabled state [ 69.132914][ T6808] device bridge_slave_1 entered promiscuous mode [ 69.154171][ T6808] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 69.165061][ T6808] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 69.188309][ T6808] team0: Port device team_slave_0 added [ 69.196338][ T6808] team0: Port device team_slave_1 added [ 69.214999][ T6808] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 69.221952][ T6808] 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. [ 69.248611][ T6808] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 69.261438][ T6808] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 69.268900][ T6808] 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. [ 69.295433][ T6808] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 69.365758][ T6808] device hsr_slave_0 entered promiscuous mode [ 69.432663][ T6808] device hsr_slave_1 entered promiscuous mode [ 69.561712][ T6808] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 69.615849][ T6808] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 69.675172][ T6808] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 69.734529][ T6808] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 69.789195][ T6808] bridge0: port 2(bridge_slave_1) entered blocking state [ 69.796457][ T6808] bridge0: port 2(bridge_slave_1) entered forwarding state [ 69.804440][ T6808] bridge0: port 1(bridge_slave_0) entered blocking state [ 69.811553][ T6808] bridge0: port 1(bridge_slave_0) entered forwarding state [ 69.860026][ T6808] 8021q: adding VLAN 0 to HW filter on device bond0 [ 69.875137][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 69.885279][ T5] bridge0: port 1(bridge_slave_0) entered disabled state [ 69.894714][ T5] bridge0: port 2(bridge_slave_1) entered disabled state [ 69.903988][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 69.917736][ T6808] 8021q: adding VLAN 0 to HW filter on device team0 [ 69.929749][ T3796] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 69.938994][ T3796] bridge0: port 1(bridge_slave_0) entered blocking state [ 69.946241][ T3796] bridge0: port 1(bridge_slave_0) entered forwarding state [ 69.958900][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 69.968481][ T5] bridge0: port 2(bridge_slave_1) entered blocking state [ 69.975601][ T5] bridge0: port 2(bridge_slave_1) entered forwarding state [ 69.996065][ T3796] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 70.005441][ T3796] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 70.018040][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 70.027172][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 70.042273][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 70.050821][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 70.060063][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 70.069179][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 70.083542][ T6808] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 70.103093][ T3796] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 70.110484][ T3796] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 70.126927][ T6808] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 70.146095][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 70.155605][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 70.174311][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 70.184674][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 70.195161][ T6808] device veth0_vlan entered promiscuous mode [ 70.202737][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 70.210589][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 70.224764][ T6808] device veth1_vlan entered promiscuous mode [ 70.247513][ T3796] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 70.255594][ T3796] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 70.264429][ T3796] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 70.273614][ T3796] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 70.285539][ T6808] device veth0_macvtap entered promiscuous mode [ 70.295615][ T6808] device veth1_macvtap entered promiscuous mode [ 70.314587][ T6808] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 70.322819][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 70.330869][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 70.339981][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 70.348919][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 70.362929][ T6808] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 70.373394][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 70.381948][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 73.673652][ C0] ================================================================== [ 73.681863][ C0] BUG: KASAN: slab-out-of-bounds in ip_icmp_error+0x4e1/0x5a0 [ 73.689313][ C0] Read of size 1 at addr ffff888093265000 by task ksoftirqd/0/9 [ 73.696912][ C0] [ 73.699222][ C0] CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 5.7.0-rc7-next-20200526-syzkaller #0 [ 73.708473][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.718518][ C0] Call Trace: [ 73.721804][ C0] dump_stack+0x18f/0x20d [ 73.726148][ C0] ? ip_icmp_error+0x4e1/0x5a0 [ 73.730923][ C0] ? ip_icmp_error+0x4e1/0x5a0 [ 73.735676][ C0] print_address_description.constprop.0.cold+0xd3/0x413 [ 73.742679][ C0] ? memcpy+0x39/0x60 [ 73.746649][ C0] ? vprintk_func+0x97/0x1a6 [ 73.751224][ C0] ? ip_icmp_error+0x4e1/0x5a0 [ 73.755964][ C0] kasan_report.cold+0x1f/0x37 [ 73.760711][ C0] ? skb_clone+0x190/0x3c0 [ 73.765713][ C0] ? ip_icmp_error+0x4e1/0x5a0 [ 73.770453][ C0] ip_icmp_error+0x4e1/0x5a0 [ 73.775024][ C0] tcp_v4_err+0x99e/0x1ce0 [ 73.779418][ C0] ? tcp_v4_do_rcv+0x8b0/0x8b0 [ 73.784158][ C0] icmp_socket_deliver+0x1e1/0x360 [ 73.789246][ C0] icmp_unreach+0x33b/0xab0 [ 73.793731][ C0] icmp_rcv+0xee6/0x15f0 [ 73.797965][ C0] ip_protocol_deliver_rcu+0x57/0x880 [ 73.803456][ C0] ? check_preemption_disabled+0x38/0x220 [ 73.809166][ C0] ip_local_deliver_finish+0x220/0x360 [ 73.814753][ C0] ip_local_deliver+0x1c8/0x4e0 [ 73.819588][ C0] ? ip_local_deliver_finish+0x360/0x360 [ 73.825207][ C0] ? ip_rcv+0x244/0x3c0 [ 73.829342][ C0] ? ip_protocol_deliver_rcu+0x880/0x880 [ 73.834958][ C0] ? lock_downgrade+0x840/0x840 [ 73.839784][ C0] ? ip_rcv_finish_core.isra.0+0x606/0x1ea0 [ 73.845659][ C0] ip_rcv_finish+0x1da/0x2f0 [ 73.850251][ C0] ip_rcv+0xd0/0x3c0 [ 73.854133][ C0] ? ip_local_deliver+0x4e0/0x4e0 [ 73.859165][ C0] ? ip_rcv_finish_core.isra.0+0x1ea0/0x1ea0 [ 73.865139][ C0] ? ip_local_deliver+0x4e0/0x4e0 [ 73.870239][ C0] __netif_receive_skb_one_core+0x114/0x180 [ 73.876121][ C0] ? __netif_receive_skb_core+0x33f0/0x33f0 [ 73.881997][ C0] ? do_raw_spin_lock+0x120/0x2d0 [ 73.887016][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 73.891948][ C0] __netif_receive_skb+0x27/0x1c0 [ 73.896993][ C0] process_backlog+0x21e/0x7a0 [ 73.901747][ C0] ? lockdep_hardirqs_on_prepare+0x1bc/0x590 [ 73.907715][ C0] net_rx_action+0x4e1/0x10d0 [ 73.912388][ C0] ? napi_busy_loop+0x9e0/0x9e0 [ 73.917230][ C0] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 73.923186][ C0] ? lockdep_hardirqs_on_prepare+0x1bc/0x590 [ 73.929140][ C0] __do_softirq+0x268/0x9ee [ 73.933625][ C0] ? takeover_tasklets+0x810/0x810 [ 73.938720][ C0] run_ksoftirqd+0x89/0x100 [ 73.943211][ C0] smpboot_thread_fn+0x653/0x9e0 [ 73.948137][ C0] ? smpboot_register_percpu_thread+0x370/0x370 [ 73.954364][ C0] ? __kthread_parkme+0x13f/0x1e0 [ 73.959366][ C0] ? smpboot_register_percpu_thread+0x370/0x370 [ 73.965585][ C0] kthread+0x3b5/0x4a0 [ 73.969640][ C0] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 73.975333][ C0] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 73.981042][ C0] ret_from_fork+0x1f/0x30 [ 73.985458][ C0] [ 73.987762][ C0] Allocated by task 3880: [ 73.992116][ C0] save_stack+0x1b/0x40 [ 73.996269][ C0] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 74.001895][ C0] kmem_cache_alloc+0x11b/0x740 [ 74.006750][ C0] vm_area_dup+0x88/0x2b0 [ 74.011092][ C0] dup_mm+0x511/0x1300 [ 74.015137][ C0] copy_process+0x29e3/0x7130 [ 74.019806][ C0] _do_fork+0x12d/0x1000 [ 74.024036][ C0] __do_sys_clone+0xef/0x150 [ 74.028604][ C0] do_syscall_64+0x60/0xe0 [ 74.032997][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 74.038881][ C0] [ 74.041195][ C0] Freed by task 6739: [ 74.045173][ C0] save_stack+0x1b/0x40 [ 74.049317][ C0] __kasan_slab_free+0xf7/0x140 [ 74.054157][ C0] kmem_cache_free+0x7f/0x320 [ 74.058921][ C0] remove_vma+0x132/0x170 [ 74.063226][ C0] exit_mmap+0x354/0x530 [ 74.067443][ C0] mmput+0x168/0x4b0 [ 74.071309][ C0] do_exit+0xa7d/0x2e00 [ 74.075464][ C0] do_group_exit+0x125/0x340 [ 74.080093][ C0] __x64_sys_exit_group+0x3a/0x50 [ 74.085113][ C0] do_syscall_64+0x60/0xe0 [ 74.089511][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 74.095375][ C0] [ 74.097685][ C0] The buggy address belongs to the object at ffff888093265040 [ 74.097685][ C0] which belongs to the cache vm_area_struct of size 200 [ 74.111997][ C0] The buggy address is located 64 bytes to the left of [ 74.111997][ C0] 200-byte region [ffff888093265040, ffff888093265108) [ 74.125611][ C0] The buggy address belongs to the page: [ 74.131227][ C0] page:ffffea00024c9940 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 74.140323][ C0] flags: 0xfffe0000000200(slab) [ 74.145172][ C0] raw: 00fffe0000000200 ffffea0002402188 ffffea00027e5108 ffff8880aa1ec380 [ 74.153840][ C0] raw: 0000000000000000 ffff888093265040 000000010000000f 0000000000000000 [ 74.162414][ C0] page dumped because: kasan: bad access detected [ 74.168804][ C0] [ 74.171131][ C0] Memory state around the buggy address: [ 74.176747][ C0] ffff888093264f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 74.184799][ C0] ffff888093264f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 74.193649][ C0] >ffff888093265000: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb [ 74.201693][ C0] ^ [ 74.205747][ C0] ffff888093265080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 74.213787][ C0] ffff888093265100: fb fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb [ 74.221824][ C0] ================================================================== [ 74.229961][ C0] Disabling lock debugging due to kernel taint [ 74.236138][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 74.242750][ C0] CPU: 0 PID: 9 Comm: ksoftirqd/0 Tainted: G B 5.7.0-rc7-next-20200526-syzkaller #0 [ 74.253449][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.263501][ C0] Call Trace: [ 74.266819][ C0] dump_stack+0x18f/0x20d [ 74.271152][ C0] ? ip_icmp_error+0x3f0/0x5a0 [ 74.275919][ C0] panic+0x2e3/0x75c [ 74.279790][ C0] ? __warn_printk+0xf3/0xf3 [ 74.284355][ C0] ? ip_icmp_error+0x4e1/0x5a0 [ 74.289091][ C0] ? trace_hardirqs_on+0x55/0x220 [ 74.294439][ C0] ? ip_icmp_error+0x4e1/0x5a0 [ 74.299442][ C0] ? ip_icmp_error+0x4e1/0x5a0 [ 74.304209][ C0] end_report+0x4d/0x53 [ 74.308373][ C0] kasan_report.cold+0xd/0x37 [ 74.313037][ C0] ? skb_clone+0x190/0x3c0 [ 74.317431][ C0] ? ip_icmp_error+0x4e1/0x5a0 [ 74.322172][ C0] ip_icmp_error+0x4e1/0x5a0 [ 74.326741][ C0] tcp_v4_err+0x99e/0x1ce0 [ 74.331132][ C0] ? tcp_v4_do_rcv+0x8b0/0x8b0 [ 74.335891][ C0] icmp_socket_deliver+0x1e1/0x360 [ 74.340974][ C0] icmp_unreach+0x33b/0xab0 [ 74.345464][ C0] icmp_rcv+0xee6/0x15f0 [ 74.349679][ C0] ip_protocol_deliver_rcu+0x57/0x880 [ 74.355035][ C0] ? check_preemption_disabled+0x38/0x220 [ 74.360743][ C0] ip_local_deliver_finish+0x220/0x360 [ 74.366183][ C0] ip_local_deliver+0x1c8/0x4e0 [ 74.371025][ C0] ? ip_local_deliver_finish+0x360/0x360 [ 74.376643][ C0] ? ip_rcv+0x244/0x3c0 [ 74.380786][ C0] ? ip_protocol_deliver_rcu+0x880/0x880 [ 74.386400][ C0] ? lock_downgrade+0x840/0x840 [ 74.391241][ C0] ? ip_rcv_finish_core.isra.0+0x606/0x1ea0 [ 74.397129][ C0] ip_rcv_finish+0x1da/0x2f0 [ 74.401727][ C0] ip_rcv+0xd0/0x3c0 [ 74.405609][ C0] ? ip_local_deliver+0x4e0/0x4e0 [ 74.410605][ C0] ? ip_rcv_finish_core.isra.0+0x1ea0/0x1ea0 [ 74.416571][ C0] ? ip_local_deliver+0x4e0/0x4e0 [ 74.421587][ C0] __netif_receive_skb_one_core+0x114/0x180 [ 74.427460][ C0] ? __netif_receive_skb_core+0x33f0/0x33f0 [ 74.433328][ C0] ? do_raw_spin_lock+0x120/0x2d0 [ 74.438325][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 74.443241][ C0] __netif_receive_skb+0x27/0x1c0 [ 74.448237][ C0] process_backlog+0x21e/0x7a0 [ 74.452990][ C0] ? lockdep_hardirqs_on_prepare+0x1bc/0x590 [ 74.458940][ C0] net_rx_action+0x4e1/0x10d0 [ 74.463591][ C0] ? napi_busy_loop+0x9e0/0x9e0 [ 74.468414][ C0] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 74.474370][ C0] ? lockdep_hardirqs_on_prepare+0x1bc/0x590 [ 74.480342][ C0] __do_softirq+0x268/0x9ee [ 74.484825][ C0] ? takeover_tasklets+0x810/0x810 [ 74.489921][ C0] run_ksoftirqd+0x89/0x100 [ 74.494403][ C0] smpboot_thread_fn+0x653/0x9e0 [ 74.499341][ C0] ? smpboot_register_percpu_thread+0x370/0x370 [ 74.505553][ C0] ? __kthread_parkme+0x13f/0x1e0 [ 74.510562][ C0] ? smpboot_register_percpu_thread+0x370/0x370 [ 74.516798][ C0] kthread+0x3b5/0x4a0 [ 74.520855][ C0] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 74.526562][ C0] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 74.532254][ C0] ret_from_fork+0x1f/0x30 [ 74.537934][ C0] Kernel Offset: disabled [ 74.542247][ C0] Rebooting in 86400 seconds..