[ 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. Starting Load/Save RF Kill Switch Status... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.15.200' (ECDSA) to the list of known hosts. syzkaller login: [ 60.432871][ T6808] IPVS: ftp: loaded support on port[0] = 21 [ 60.524093][ T6808] chnl_net:caif_netlink_parms(): no params data found [ 60.576262][ T6808] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.584571][ T6808] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.594445][ T6808] device bridge_slave_0 entered promiscuous mode [ 60.606018][ T6808] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.614819][ T6808] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.624119][ T6808] device bridge_slave_1 entered promiscuous mode [ 60.645121][ T6808] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.656096][ T6808] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.680070][ T6808] team0: Port device team_slave_0 added [ 60.688224][ T6808] team0: Port device team_slave_1 added [ 60.706758][ T6808] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 60.713856][ 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. [ 60.741734][ T6808] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 60.754709][ T6808] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 60.762259][ 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. [ 60.788979][ T6808] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 60.850807][ T6808] device hsr_slave_0 entered promiscuous mode [ 60.897304][ T6808] device hsr_slave_1 entered promiscuous mode [ 61.045890][ T6808] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 61.120242][ T6808] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 61.169677][ T6808] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 61.209133][ T6808] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 61.264370][ T6808] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.272030][ T6808] bridge0: port 2(bridge_slave_1) entered forwarding state [ 61.280032][ T6808] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.287208][ T6808] bridge0: port 1(bridge_slave_0) entered forwarding state [ 61.332549][ T6808] 8021q: adding VLAN 0 to HW filter on device bond0 [ 61.345896][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 61.358890][ T12] bridge0: port 1(bridge_slave_0) entered disabled state [ 61.368754][ T12] bridge0: port 2(bridge_slave_1) entered disabled state [ 61.378947][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 61.391958][ T6808] 8021q: adding VLAN 0 to HW filter on device team0 [ 61.403411][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 61.412591][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.419726][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 61.433397][ T2585] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 61.442528][ T2585] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.449650][ T2585] bridge0: port 2(bridge_slave_1) entered forwarding state [ 61.470272][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 61.479152][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 61.493257][ T2585] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 61.507301][ T2585] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 61.517224][ T2585] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 61.529597][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 61.538180][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 61.550290][ T6808] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 61.570643][ T2585] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 61.578365][ T2585] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 61.598448][ T6808] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 61.618051][ T2585] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 61.628384][ T2585] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 61.649193][ T2554] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 61.658513][ T2554] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 61.670078][ T6808] device veth0_vlan entered promiscuous mode [ 61.677784][ T2554] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 61.685502][ T2554] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 61.701438][ T6808] device veth1_vlan entered promiscuous mode [ 61.722396][ T2585] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 61.730773][ T2585] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 61.739942][ T2585] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 61.749490][ T2585] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 61.761700][ T6808] device veth0_macvtap entered promiscuous mode [ 61.771935][ T6808] device veth1_macvtap entered promiscuous mode [ 61.789662][ T6808] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 61.797387][ T2554] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 61.805505][ T2554] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 61.814188][ T2554] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 61.823450][ T2554] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 61.836022][ T6808] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 61.845780][ T2585] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 61.855414][ T2585] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 65.107428][ C1] ================================================================== [ 65.115747][ C1] BUG: KASAN: slab-out-of-bounds in ip_icmp_error+0x52a/0x5a0 [ 65.123189][ C1] Read of size 1 at addr ffff888092597fff by task ksoftirqd/1/16 [ 65.130876][ C1] [ 65.133250][ C1] CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.7.0-rc7-next-20200526-syzkaller #0 [ 65.142599][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.152783][ C1] Call Trace: [ 65.156068][ C1] dump_stack+0x18f/0x20d [ 65.160379][ C1] ? ip_icmp_error+0x52a/0x5a0 [ 65.165132][ C1] ? ip_icmp_error+0x52a/0x5a0 [ 65.169878][ C1] print_address_description.constprop.0.cold+0xd3/0x413 [ 65.176875][ C1] ? memcpy+0x39/0x60 [ 65.180840][ C1] ? vprintk_func+0x97/0x1a6 [ 65.185408][ C1] ? ip_icmp_error+0x52a/0x5a0 [ 65.190147][ C1] kasan_report.cold+0x1f/0x37 [ 65.194898][ C1] ? skb_clone+0x190/0x3c0 [ 65.199301][ C1] ? ip_icmp_error+0x52a/0x5a0 [ 65.204063][ C1] ip_icmp_error+0x52a/0x5a0 [ 65.208632][ C1] tcp_v4_err+0x99e/0x1ce0 [ 65.213087][ C1] ? tcp_v4_do_rcv+0x8b0/0x8b0 [ 65.218729][ C1] icmp_socket_deliver+0x1e1/0x360 [ 65.223937][ C1] icmp_unreach+0x33b/0xab0 [ 65.228529][ C1] icmp_rcv+0xee6/0x15f0 [ 65.232761][ C1] ip_protocol_deliver_rcu+0x57/0x880 [ 65.238122][ C1] ? check_preemption_disabled+0x38/0x220 [ 65.243824][ C1] ip_local_deliver_finish+0x220/0x360 [ 65.249262][ C1] ip_local_deliver+0x1c8/0x4e0 [ 65.254086][ C1] ? ip_local_deliver_finish+0x360/0x360 [ 65.259869][ C1] ? ip_rcv+0x244/0x3c0 [ 65.264093][ C1] ? ip_protocol_deliver_rcu+0x880/0x880 [ 65.269714][ C1] ? lock_downgrade+0x840/0x840 [ 65.274712][ C1] ? ip_rcv_finish_core.isra.0+0x606/0x1ea0 [ 65.280603][ C1] ip_rcv_finish+0x1da/0x2f0 [ 65.285189][ C1] ip_rcv+0xd0/0x3c0 [ 65.289079][ C1] ? ip_local_deliver+0x4e0/0x4e0 [ 65.294100][ C1] ? ip_rcv_finish_core.isra.0+0x1ea0/0x1ea0 [ 65.300506][ C1] ? ip_local_deliver+0x4e0/0x4e0 [ 65.306026][ C1] __netif_receive_skb_one_core+0x114/0x180 [ 65.312739][ C1] ? __netif_receive_skb_core+0x33f0/0x33f0 [ 65.318625][ C1] ? do_raw_spin_lock+0x120/0x2d0 [ 65.323662][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 65.328592][ C1] __netif_receive_skb+0x27/0x1c0 [ 65.333620][ C1] process_backlog+0x21e/0x7a0 [ 65.338455][ C1] ? lockdep_hardirqs_on_prepare+0x1bc/0x590 [ 65.344428][ C1] net_rx_action+0x4e1/0x10d0 [ 65.349100][ C1] ? napi_busy_loop+0x9e0/0x9e0 [ 65.353946][ C1] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.359906][ C1] ? lockdep_hardirqs_on_prepare+0x1bc/0x590 [ 65.365962][ C1] __do_softirq+0x268/0x9ee [ 65.370633][ C1] ? takeover_tasklets+0x810/0x810 [ 65.375718][ C1] run_ksoftirqd+0x89/0x100 [ 65.380266][ C1] smpboot_thread_fn+0x653/0x9e0 [ 65.385214][ C1] ? smpboot_register_percpu_thread+0x370/0x370 [ 65.391528][ C1] ? __kthread_parkme+0x13f/0x1e0 [ 65.396563][ C1] ? smpboot_register_percpu_thread+0x370/0x370 [ 65.402787][ C1] kthread+0x3b5/0x4a0 [ 65.406837][ C1] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.412541][ C1] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.418508][ C1] ret_from_fork+0x1f/0x30 [ 65.422903][ C1] [ 65.425211][ C1] Allocated by task 4845: [ 65.429531][ C1] save_stack+0x1b/0x40 [ 65.433681][ C1] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 65.439288][ C1] kmem_cache_alloc+0x11b/0x740 [ 65.444113][ C1] getname_flags+0xd2/0x5b0 [ 65.448592][ C1] user_path_at_empty+0x2a/0x50 [ 65.453464][ C1] vfs_statx+0x14b/0x370 [ 65.457694][ C1] __do_sys_newlstat+0x91/0x110 [ 65.462518][ C1] do_syscall_64+0x60/0xe0 [ 65.466926][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.472785][ C1] [ 65.475088][ C1] Freed by task 4845: [ 65.479064][ C1] save_stack+0x1b/0x40 [ 65.483194][ C1] __kasan_slab_free+0xf7/0x140 [ 65.488022][ C1] kmem_cache_free+0x7f/0x320 [ 65.492884][ C1] putname+0xe1/0x120 [ 65.496951][ C1] filename_lookup+0x282/0x3e0 [ 65.501712][ C1] vfs_statx+0x14b/0x370 [ 65.505964][ C1] __do_sys_newlstat+0x91/0x110 [ 65.510803][ C1] do_syscall_64+0x60/0xe0 [ 65.515193][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.521065][ C1] [ 65.523376][ C1] The buggy address belongs to the object at ffff888092596980 [ 65.523376][ C1] which belongs to the cache names_cache of size 4096 [ 65.537497][ C1] The buggy address is located 1663 bytes to the right of [ 65.537497][ C1] 4096-byte region [ffff888092596980, ffff888092597980) [ 65.551541][ C1] The buggy address belongs to the page: [ 65.557169][ C1] page:ffffea0002496580 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 head:ffffea0002496580 order:1 compound_mapcount:0 [ 65.570610][ C1] flags: 0xfffe0000010200(slab|head) [ 65.575908][ C1] raw: 00fffe0000010200 ffffea0002487408 ffffea0002a48a88 ffff8880aa1ec000 [ 65.584519][ C1] raw: 0000000000000000 ffff888092596980 0000000100000001 0000000000000000 [ 65.593170][ C1] page dumped because: kasan: bad access detected [ 65.599557][ C1] [ 65.601874][ C1] Memory state around the buggy address: [ 65.607663][ C1] ffff888092597e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 65.615697][ C1] ffff888092597f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 65.623732][ C1] >ffff888092597f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 65.631774][ C1] ^ [ 65.639730][ C1] ffff888092598000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 65.647780][ C1] ffff888092598080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 65.655811][ C1] ================================================================== [ 65.663847][ C1] Disabling lock debugging due to kernel taint [ 65.670159][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 65.676746][ C1] CPU: 1 PID: 16 Comm: ksoftirqd/1 Tainted: G B 5.7.0-rc7-next-20200526-syzkaller #0 [ 65.687677][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.697734][ C1] Call Trace: [ 65.701027][ C1] dump_stack+0x18f/0x20d [ 65.705541][ C1] ? ip_icmp_error+0x4f0/0x5a0 [ 65.710294][ C1] panic+0x2e3/0x75c [ 65.714635][ C1] ? __warn_printk+0xf3/0xf3 [ 65.719210][ C1] ? ip_icmp_error+0x52a/0x5a0 [ 65.723956][ C1] ? trace_hardirqs_on+0x55/0x220 [ 65.729134][ C1] ? ip_icmp_error+0x52a/0x5a0 [ 65.733881][ C1] ? ip_icmp_error+0x52a/0x5a0 [ 65.738704][ C1] end_report+0x4d/0x53 [ 65.742867][ C1] kasan_report.cold+0xd/0x37 [ 65.747529][ C1] ? skb_clone+0x190/0x3c0 [ 65.751932][ C1] ? ip_icmp_error+0x52a/0x5a0 [ 65.756665][ C1] ip_icmp_error+0x52a/0x5a0 [ 65.761237][ C1] tcp_v4_err+0x99e/0x1ce0 [ 65.765833][ C1] ? tcp_v4_do_rcv+0x8b0/0x8b0 [ 65.770572][ C1] icmp_socket_deliver+0x1e1/0x360 [ 65.775665][ C1] icmp_unreach+0x33b/0xab0 [ 65.780336][ C1] icmp_rcv+0xee6/0x15f0 [ 65.784562][ C1] ip_protocol_deliver_rcu+0x57/0x880 [ 65.789917][ C1] ? check_preemption_disabled+0x38/0x220 [ 65.795606][ C1] ip_local_deliver_finish+0x220/0x360 [ 65.801035][ C1] ip_local_deliver+0x1c8/0x4e0 [ 65.805859][ C1] ? ip_local_deliver_finish+0x360/0x360 [ 65.811630][ C1] ? ip_rcv+0x244/0x3c0 [ 65.815776][ C1] ? ip_protocol_deliver_rcu+0x880/0x880 [ 65.821414][ C1] ? lock_downgrade+0x840/0x840 [ 65.826251][ C1] ? ip_rcv_finish_core.isra.0+0x606/0x1ea0 [ 65.832129][ C1] ip_rcv_finish+0x1da/0x2f0 [ 65.836708][ C1] ip_rcv+0xd0/0x3c0 [ 65.840579][ C1] ? ip_local_deliver+0x4e0/0x4e0 [ 65.845589][ C1] ? ip_rcv_finish_core.isra.0+0x1ea0/0x1ea0 [ 65.851560][ C1] ? ip_local_deliver+0x4e0/0x4e0 [ 65.856575][ C1] __netif_receive_skb_one_core+0x114/0x180 [ 65.862448][ C1] ? __netif_receive_skb_core+0x33f0/0x33f0 [ 65.868312][ C1] ? do_raw_spin_lock+0x120/0x2d0 [ 65.873403][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 65.878313][ C1] __netif_receive_skb+0x27/0x1c0 [ 65.883915][ C1] process_backlog+0x21e/0x7a0 [ 65.888915][ C1] ? lockdep_hardirqs_on_prepare+0x1bc/0x590 [ 65.894867][ C1] net_rx_action+0x4e1/0x10d0 [ 65.899518][ C1] ? napi_busy_loop+0x9e0/0x9e0 [ 65.904340][ C1] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.910392][ C1] ? lockdep_hardirqs_on_prepare+0x1bc/0x590 [ 65.916354][ C1] __do_softirq+0x268/0x9ee [ 65.920831][ C1] ? takeover_tasklets+0x810/0x810 [ 65.925999][ C1] run_ksoftirqd+0x89/0x100 [ 65.930610][ C1] smpboot_thread_fn+0x653/0x9e0 [ 65.935543][ C1] ? smpboot_register_percpu_thread+0x370/0x370 [ 65.941766][ C1] ? __kthread_parkme+0x13f/0x1e0 [ 65.946767][ C1] ? smpboot_register_percpu_thread+0x370/0x370 [ 65.952978][ C1] kthread+0x3b5/0x4a0 [ 65.957019][ C1] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.962710][ C1] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.968418][ C1] ret_from_fork+0x1f/0x30 [ 65.974197][ C1] Kernel Offset: disabled [ 65.978511][ C1] Rebooting in 86400 seconds..