[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.188' (ECDSA) to the list of known hosts. syzkaller login: [ 62.966189][ T6931] IPVS: ftp: loaded support on port[0] = 21 [ 63.058418][ T6931] chnl_net:caif_netlink_parms(): no params data found [ 63.112686][ T6931] bridge0: port 1(bridge_slave_0) entered blocking state [ 63.121276][ T6931] bridge0: port 1(bridge_slave_0) entered disabled state [ 63.130393][ T6931] device bridge_slave_0 entered promiscuous mode [ 63.139364][ T6931] bridge0: port 2(bridge_slave_1) entered blocking state [ 63.146664][ T6931] bridge0: port 2(bridge_slave_1) entered disabled state [ 63.154364][ T6931] device bridge_slave_1 entered promiscuous mode [ 63.174540][ T6931] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 63.185712][ T6931] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 63.210150][ T6931] team0: Port device team_slave_0 added [ 63.218663][ T6931] team0: Port device team_slave_1 added [ 63.236298][ T6931] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 63.243264][ T6931] 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. [ 63.269244][ T6931] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 63.281650][ T6931] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 63.288694][ T6931] 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. [ 63.314809][ T6931] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 63.389505][ T6931] device hsr_slave_0 entered promiscuous mode [ 63.426651][ T6931] device hsr_slave_1 entered promiscuous mode [ 63.566088][ T6931] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 63.609712][ T6931] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 63.658893][ T6931] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 63.708989][ T6931] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 63.764829][ T6931] bridge0: port 2(bridge_slave_1) entered blocking state [ 63.772083][ T6931] bridge0: port 2(bridge_slave_1) entered forwarding state [ 63.780101][ T6931] bridge0: port 1(bridge_slave_0) entered blocking state [ 63.787358][ T6931] bridge0: port 1(bridge_slave_0) entered forwarding state [ 63.834183][ T6931] 8021q: adding VLAN 0 to HW filter on device bond0 [ 63.849974][ T2913] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 63.860942][ T2913] bridge0: port 1(bridge_slave_0) entered disabled state [ 63.869703][ T2913] bridge0: port 2(bridge_slave_1) entered disabled state [ 63.878903][ T2913] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 63.891842][ T6931] 8021q: adding VLAN 0 to HW filter on device team0 [ 63.903102][ T2843] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 63.912174][ T2843] bridge0: port 1(bridge_slave_0) entered blocking state [ 63.919468][ T2843] bridge0: port 1(bridge_slave_0) entered forwarding state [ 63.931708][ T2913] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 63.941146][ T2913] bridge0: port 2(bridge_slave_1) entered blocking state [ 63.948269][ T2913] bridge0: port 2(bridge_slave_1) entered forwarding state [ 63.969543][ T2843] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 63.979199][ T2843] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 63.990867][ T2913] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 64.008824][ T6931] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 64.019630][ T6931] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 64.032948][ T2913] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 64.042740][ T2913] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 64.051596][ T2913] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 64.070381][ T2843] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 64.078701][ T2843] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 64.093245][ T6931] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 64.113648][ T2913] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 64.123768][ T2913] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 64.145771][ T6931] device veth0_vlan entered promiscuous mode [ 64.153673][ T2914] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 64.163424][ T2914] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 64.181238][ T2914] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 64.189896][ T2914] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 64.199129][ T6931] device veth1_vlan entered promiscuous mode [ 64.222624][ T2843] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 64.231368][ T2843] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 64.240123][ T2843] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 64.251015][ T2843] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 64.262784][ T6931] device veth0_macvtap entered promiscuous mode [ 64.273550][ T6931] device veth1_macvtap entered promiscuous mode [ 64.291889][ T6931] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 64.300135][ T2914] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 64.309358][ T2914] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 64.317750][ T2914] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 64.326555][ T2914] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 64.339770][ T6931] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 64.348535][ T2843] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 64.361645][ T2843] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 67.676743][ C0] ================================================================== [ 67.685028][ C0] BUG: KASAN: slab-out-of-bounds in ip_icmp_error+0x52a/0x5a0 [ 67.692475][ C0] Read of size 1 at addr ffff888092c82fff by task ksoftirqd/0/9 [ 67.700091][ C0] [ 67.702410][ C0] CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 5.7.0-rc7-next-20200526-syzkaller #0 [ 67.712048][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.722279][ C0] Call Trace: [ 67.725558][ C0] dump_stack+0x18f/0x20d [ 67.729975][ C0] ? ip_icmp_error+0x52a/0x5a0 [ 67.739869][ C0] ? ip_icmp_error+0x52a/0x5a0 [ 67.744617][ C0] print_address_description.constprop.0.cold+0xd3/0x413 [ 67.751632][ C0] ? memcpy+0x39/0x60 [ 67.755768][ C0] ? vprintk_func+0x97/0x1a6 [ 67.760347][ C0] ? ip_icmp_error+0x52a/0x5a0 [ 67.765082][ C0] kasan_report.cold+0x1f/0x37 [ 67.769925][ C0] ? skb_clone+0x190/0x3c0 [ 67.774315][ C0] ? ip_icmp_error+0x52a/0x5a0 [ 67.779144][ C0] ip_icmp_error+0x52a/0x5a0 [ 67.783714][ C0] tcp_v4_err+0x99e/0x1ce0 [ 67.788544][ C0] ? tcp_v4_do_rcv+0x8b0/0x8b0 [ 67.793296][ C0] icmp_socket_deliver+0x1e1/0x360 [ 67.798387][ C0] icmp_unreach+0x33b/0xab0 [ 67.802955][ C0] icmp_rcv+0xee6/0x15f0 [ 67.807200][ C0] ip_protocol_deliver_rcu+0x57/0x880 [ 67.812709][ C0] ? check_preemption_disabled+0x38/0x220 [ 67.818429][ C0] ip_local_deliver_finish+0x220/0x360 [ 67.823882][ C0] ip_local_deliver+0x1c8/0x4e0 [ 67.828720][ C0] ? ip_local_deliver_finish+0x360/0x360 [ 67.834588][ C0] ? ip_rcv+0x244/0x3c0 [ 67.838731][ C0] ? ip_protocol_deliver_rcu+0x880/0x880 [ 67.845045][ C0] ? lock_downgrade+0x840/0x840 [ 67.849899][ C0] ? ip_rcv_finish_core.isra.0+0x606/0x1ea0 [ 67.855773][ C0] ip_rcv_finish+0x1da/0x2f0 [ 67.860488][ C0] ip_rcv+0xd0/0x3c0 [ 67.864361][ C0] ? ip_local_deliver+0x4e0/0x4e0 [ 67.869381][ C0] ? ip_rcv_finish_core.isra.0+0x1ea0/0x1ea0 [ 67.875410][ C0] ? ip_local_deliver+0x4e0/0x4e0 [ 67.880476][ C0] __netif_receive_skb_one_core+0x114/0x180 [ 67.886545][ C0] ? __netif_receive_skb_core+0x33f0/0x33f0 [ 67.892435][ C0] ? do_raw_spin_lock+0x120/0x2d0 [ 67.897452][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 67.902370][ C0] __netif_receive_skb+0x27/0x1c0 [ 67.907386][ C0] process_backlog+0x21e/0x7a0 [ 67.912127][ C0] ? lockdep_hardirqs_on_prepare+0x1bc/0x590 [ 67.918087][ C0] net_rx_action+0x4e1/0x10d0 [ 67.922746][ C0] ? napi_busy_loop+0x9e0/0x9e0 [ 67.927590][ C0] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.936253][ C0] ? lockdep_hardirqs_on_prepare+0x1bc/0x590 [ 67.942212][ C0] __do_softirq+0x268/0x9ee [ 67.946909][ C0] ? takeover_tasklets+0x810/0x810 [ 67.951997][ C0] run_ksoftirqd+0x89/0x100 [ 67.956478][ C0] smpboot_thread_fn+0x653/0x9e0 [ 67.961574][ C0] ? smpboot_register_percpu_thread+0x370/0x370 [ 67.967800][ C0] ? __kthread_parkme+0x13f/0x1e0 [ 67.973522][ C0] ? smpboot_register_percpu_thread+0x370/0x370 [ 67.979747][ C0] kthread+0x3b5/0x4a0 [ 67.983803][ C0] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.989513][ C0] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.995678][ C0] ret_from_fork+0x1f/0x30 [ 68.000079][ C0] [ 68.002384][ C0] Allocated by task 2848: [ 68.006800][ C0] save_stack+0x1b/0x40 [ 68.011460][ C0] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 68.017107][ C0] kmem_cache_alloc_node+0x13c/0x760 [ 68.022460][ C0] __alloc_skb+0xba/0x5a0 [ 68.026774][ C0] nsim_dev_trap_report_work+0x2bb/0xbc0 [ 68.032619][ C0] process_one_work+0x965/0x1690 [ 68.037546][ C0] worker_thread+0x96/0xe20 [ 68.042031][ C0] kthread+0x3b5/0x4a0 [ 68.046082][ C0] ret_from_fork+0x1f/0x30 [ 68.050468][ C0] [ 68.052774][ C0] Freed by task 2848: [ 68.056736][ C0] save_stack+0x1b/0x40 [ 68.061386][ C0] __kasan_slab_free+0xf7/0x140 [ 68.066226][ C0] kmem_cache_free+0x7f/0x320 [ 68.070919][ C0] kfree_skbmem+0xef/0x1b0 [ 68.075346][ C0] consume_skb+0xfb/0x3f0 [ 68.080098][ C0] nsim_dev_trap_report_work+0x86d/0xbc0 [ 68.085735][ C0] process_one_work+0x965/0x1690 [ 68.090704][ C0] worker_thread+0x96/0xe20 [ 68.095360][ C0] kthread+0x3b5/0x4a0 [ 68.099408][ C0] ret_from_fork+0x1f/0x30 [ 68.103806][ C0] [ 68.106113][ C0] The buggy address belongs to the object at ffff888092c82e40 [ 68.106113][ C0] which belongs to the cache skbuff_head_cache of size 224 [ 68.120737][ C0] The buggy address is located 223 bytes to the right of [ 68.120737][ C0] 224-byte region [ffff888092c82e40, ffff888092c82f20) [ 68.134852][ C0] The buggy address belongs to the page: [ 68.140480][ C0] page:ffffea00024b2080 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 68.149566][ C0] flags: 0xfffe0000000200(slab) [ 68.154399][ C0] raw: 00fffe0000000200 ffffea00024a3f48 ffffea00024c4848 ffff8880a90188c0 [ 68.162959][ C0] raw: 0000000000000000 ffff888092c82080 000000010000000c 0000000000000000 [ 68.171705][ C0] page dumped because: kasan: bad access detected [ 68.178087][ C0] [ 68.180388][ C0] Memory state around the buggy address: [ 68.186004][ C0] ffff888092c82e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.194178][ C0] ffff888092c82f00: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 68.203797][ C0] >ffff888092c82f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 68.211854][ C0] ^ [ 68.219839][ C0] ffff888092c83000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 68.228207][ C0] ffff888092c83080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 68.236250][ C0] ================================================================== [ 68.244298][ C0] Disabling lock debugging due to kernel taint [ 68.250675][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 68.257860][ C0] CPU: 0 PID: 9 Comm: ksoftirqd/0 Tainted: G B 5.7.0-rc7-next-20200526-syzkaller #0 [ 68.268521][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.278745][ C0] Call Trace: [ 68.282037][ C0] dump_stack+0x18f/0x20d [ 68.286471][ C0] ? ip_icmp_error+0x4f0/0x5a0 [ 68.291213][ C0] panic+0x2e3/0x75c [ 68.295081][ C0] ? __warn_printk+0xf3/0xf3 [ 68.299914][ C0] ? ip_icmp_error+0x52a/0x5a0 [ 68.304673][ C0] ? trace_hardirqs_on+0x55/0x220 [ 68.309671][ C0] ? ip_icmp_error+0x52a/0x5a0 [ 68.314424][ C0] ? ip_icmp_error+0x52a/0x5a0 [ 68.319162][ C0] end_report+0x4d/0x53 [ 68.323379][ C0] kasan_report.cold+0xd/0x37 [ 68.328216][ C0] ? skb_clone+0x190/0x3c0 [ 68.332607][ C0] ? ip_icmp_error+0x52a/0x5a0 [ 68.337379][ C0] ip_icmp_error+0x52a/0x5a0 [ 68.341950][ C0] tcp_v4_err+0x99e/0x1ce0 [ 68.347403][ C0] ? tcp_v4_do_rcv+0x8b0/0x8b0 [ 68.352156][ C0] icmp_socket_deliver+0x1e1/0x360 [ 68.357392][ C0] icmp_unreach+0x33b/0xab0 [ 68.361948][ C0] icmp_rcv+0xee6/0x15f0 [ 68.366437][ C0] ip_protocol_deliver_rcu+0x57/0x880 [ 68.371947][ C0] ? check_preemption_disabled+0x38/0x220 [ 68.377771][ C0] ip_local_deliver_finish+0x220/0x360 [ 68.383207][ C0] ip_local_deliver+0x1c8/0x4e0 [ 68.388265][ C0] ? ip_local_deliver_finish+0x360/0x360 [ 68.393875][ C0] ? ip_rcv+0x244/0x3c0 [ 68.398010][ C0] ? ip_protocol_deliver_rcu+0x880/0x880 [ 68.404068][ C0] ? lock_downgrade+0x840/0x840 [ 68.408993][ C0] ? ip_rcv_finish_core.isra.0+0x606/0x1ea0 [ 68.415380][ C0] ip_rcv_finish+0x1da/0x2f0 [ 68.420137][ C0] ip_rcv+0xd0/0x3c0 [ 68.424028][ C0] ? ip_local_deliver+0x4e0/0x4e0 [ 68.429049][ C0] ? ip_rcv_finish_core.isra.0+0x1ea0/0x1ea0 [ 68.435002][ C0] ? ip_local_deliver+0x4e0/0x4e0 [ 68.440016][ C0] __netif_receive_skb_one_core+0x114/0x180 [ 68.446245][ C0] ? __netif_receive_skb_core+0x33f0/0x33f0 [ 68.452141][ C0] ? do_raw_spin_lock+0x120/0x2d0 [ 68.457523][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 68.462469][ C0] __netif_receive_skb+0x27/0x1c0 [ 68.467471][ C0] process_backlog+0x21e/0x7a0 [ 68.472219][ C0] ? lockdep_hardirqs_on_prepare+0x1bc/0x590 [ 68.478176][ C0] net_rx_action+0x4e1/0x10d0 [ 68.482826][ C0] ? napi_busy_loop+0x9e0/0x9e0 [ 68.487652][ C0] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 68.493606][ C0] ? lockdep_hardirqs_on_prepare+0x1bc/0x590 [ 68.499654][ C0] __do_softirq+0x268/0x9ee [ 68.504136][ C0] ? takeover_tasklets+0x810/0x810 [ 68.509233][ C0] run_ksoftirqd+0x89/0x100 [ 68.513741][ C0] smpboot_thread_fn+0x653/0x9e0 [ 68.518734][ C0] ? smpboot_register_percpu_thread+0x370/0x370 [ 68.525040][ C0] ? __kthread_parkme+0x13f/0x1e0 [ 68.530533][ C0] ? smpboot_register_percpu_thread+0x370/0x370 [ 68.537106][ C0] kthread+0x3b5/0x4a0 [ 68.541168][ C0] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 68.546871][ C0] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 68.552654][ C0] ret_from_fork+0x1f/0x30 [ 68.558570][ C0] Kernel Offset: disabled [ 68.562949][ C0] Rebooting in 86400 seconds..