[ 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 '10.128.0.151' (ECDSA) to the list of known hosts. syzkaller login: [ 56.688605][ T7071] IPVS: ftp: loaded support on port[0] = 21 [ 56.779472][ T7071] chnl_net:caif_netlink_parms(): no params data found [ 56.832971][ T7071] bridge0: port 1(bridge_slave_0) entered blocking state [ 56.840850][ T7071] bridge0: port 1(bridge_slave_0) entered disabled state [ 56.848606][ T7071] device bridge_slave_0 entered promiscuous mode [ 56.858537][ T7071] bridge0: port 2(bridge_slave_1) entered blocking state [ 56.866955][ T7071] bridge0: port 2(bridge_slave_1) entered disabled state [ 56.875184][ T7071] device bridge_slave_1 entered promiscuous mode [ 56.895452][ T7071] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 56.906272][ T7071] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 56.928809][ T7071] team0: Port device team_slave_0 added [ 56.936231][ T7071] team0: Port device team_slave_1 added [ 56.954819][ T7071] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 56.961894][ T7071] 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. [ 56.988225][ T7071] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 57.001234][ T7071] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 57.008177][ T7071] 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. [ 57.034238][ T7071] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 57.093249][ T7071] device hsr_slave_0 entered promiscuous mode [ 57.150568][ T7071] device hsr_slave_1 entered promiscuous mode [ 57.295588][ T7071] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 57.342969][ T7071] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 57.442131][ T7071] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 57.482133][ T7071] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 57.555045][ T7071] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.562228][ T7071] bridge0: port 2(bridge_slave_1) entered forwarding state [ 57.569743][ T7071] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.576861][ T7071] bridge0: port 1(bridge_slave_0) entered forwarding state [ 57.623159][ T7071] 8021q: adding VLAN 0 to HW filter on device bond0 [ 57.635965][ T41] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 57.645745][ T41] bridge0: port 1(bridge_slave_0) entered disabled state [ 57.653805][ T41] bridge0: port 2(bridge_slave_1) entered disabled state [ 57.662112][ T41] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 57.674957][ T7071] 8021q: adding VLAN 0 to HW filter on device team0 [ 57.685708][ T2724] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 57.694787][ T2724] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.701898][ T2724] bridge0: port 1(bridge_slave_0) entered forwarding state [ 57.713921][ T41] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 57.723175][ T41] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.730270][ T41] bridge0: port 2(bridge_slave_1) entered forwarding state [ 57.753382][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 57.762290][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 57.771973][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 57.786466][ T7071] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 57.797649][ T7071] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 57.811339][ T2698] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 57.823094][ T2698] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 57.831908][ T2698] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 57.841847][ T2698] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 57.866445][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 57.874090][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 57.882514][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 57.895942][ T7071] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 57.914081][ T41] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 57.923197][ T41] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 57.943923][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 57.952429][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 57.963300][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 57.971528][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 57.981373][ T7071] device veth0_vlan entered promiscuous mode [ 57.993824][ T7071] device veth1_vlan entered promiscuous mode [ 58.014741][ T41] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 58.023288][ T41] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 58.031981][ T41] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 58.041527][ T41] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 58.052857][ T7071] device veth0_macvtap entered promiscuous mode [ 58.065450][ T7071] device veth1_macvtap entered promiscuous mode [ 58.082244][ T7071] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 58.090956][ T41] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 58.098919][ T41] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 58.108003][ T41] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 58.117180][ T41] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 58.129469][ T7071] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 58.138378][ T41] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 58.147189][ T41] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 61.410438][ C1] ================================================================== [ 61.418645][ C1] BUG: KASAN: use-after-free in ip_icmp_error+0x52a/0x5a0 [ 61.425820][ C1] Read of size 1 at addr ffff88809325afff by task ksoftirqd/1/16 [ 61.433506][ C1] [ 61.435849][ C1] CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.7.0-rc6-syzkaller #0 [ 61.443970][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.454020][ C1] Call Trace: [ 61.457300][ C1] dump_stack+0x188/0x20d [ 61.461614][ C1] print_address_description.constprop.0.cold+0xd3/0x413 [ 61.468621][ C1] ? skb_splice_bits+0x1a0/0x1a0 [ 61.473532][ C1] ? __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 61.479326][ C1] ? vprintk_func+0x81/0x17e [ 61.483898][ C1] ? ip_icmp_error+0x52a/0x5a0 [ 61.488650][ C1] __kasan_report.cold+0x20/0x38 [ 61.493562][ C1] ? ip_icmp_error+0x52a/0x5a0 [ 61.498308][ C1] ? ip_icmp_error+0x52a/0x5a0 [ 61.503043][ C1] kasan_report+0x33/0x50 [ 61.507348][ C1] ip_icmp_error+0x52a/0x5a0 [ 61.511936][ C1] tcp_v4_err+0x9b2/0x1d00 [ 61.516329][ C1] ? tcp_v4_do_rcv+0x8b0/0x8b0 [ 61.521071][ C1] icmp_socket_deliver+0x1e4/0x360 [ 61.526164][ C1] icmp_unreach+0x33b/0xab0 [ 61.530643][ C1] icmp_rcv+0xee6/0x15f0 [ 61.534876][ C1] ip_protocol_deliver_rcu+0x57/0x880 [ 61.540236][ C1] ip_local_deliver_finish+0x220/0x360 [ 61.545695][ C1] ip_local_deliver+0x1c8/0x4e0 [ 61.550541][ C1] ? ip_local_deliver_finish+0x360/0x360 [ 61.556153][ C1] ? ip_rcv+0x24e/0x3c0 [ 61.560293][ C1] ? ip_protocol_deliver_rcu+0x880/0x880 [ 61.565906][ C1] ? lock_downgrade+0x840/0x840 [ 61.570738][ C1] ? ip_rcv_finish_core.isra.0+0x606/0x1ec0 [ 61.576605][ C1] ip_rcv_finish+0x1da/0x2f0 [ 61.581171][ C1] ip_rcv+0xd0/0x3c0 [ 61.585058][ C1] ? ip_local_deliver+0x4e0/0x4e0 [ 61.590058][ C1] ? ip_rcv_finish_core.isra.0+0x1ec0/0x1ec0 [ 61.596011][ C1] ? ip_local_deliver+0x4e0/0x4e0 [ 61.601019][ C1] __netif_receive_skb_one_core+0x114/0x180 [ 61.606902][ C1] ? __netif_receive_skb_core+0x31c0/0x31c0 [ 61.612771][ C1] ? do_raw_spin_lock+0x129/0x2e0 [ 61.617766][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 61.622680][ C1] __netif_receive_skb+0x27/0x1c0 [ 61.627692][ C1] process_backlog+0x21e/0x7a0 [ 61.632431][ C1] ? net_rx_action+0x25f/0x1070 [ 61.637254][ C1] net_rx_action+0x4c2/0x1070 [ 61.641914][ C1] ? napi_busy_loop+0x9e0/0x9e0 [ 61.646740][ C1] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.652694][ C1] __do_softirq+0x26c/0x9f7 [ 61.657174][ C1] ? takeover_tasklets+0x810/0x810 [ 61.662255][ C1] run_ksoftirqd+0x89/0x100 [ 61.666727][ C1] smpboot_thread_fn+0x653/0x9e0 [ 61.671640][ C1] ? __smpboot_create_thread.part.0+0x340/0x340 [ 61.677866][ C1] ? __kthread_parkme+0x13f/0x1e0 [ 61.682863][ C1] ? __smpboot_create_thread.part.0+0x340/0x340 [ 61.689084][ C1] kthread+0x388/0x470 [ 61.693128][ C1] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.698819][ C1] ret_from_fork+0x24/0x30 [ 61.703225][ C1] [ 61.705528][ C1] Allocated by task 4114: [ 61.709841][ C1] save_stack+0x1b/0x40 [ 61.713978][ C1] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 61.719591][ C1] kmem_cache_alloc+0x11b/0x740 [ 61.724413][ C1] getname_flags+0xd2/0x5b0 [ 61.728889][ C1] do_sys_openat2+0x3fc/0x7d0 [ 61.733567][ C1] do_sys_open+0xc3/0x140 [ 61.737879][ C1] do_syscall_64+0xf6/0x7d0 [ 61.742367][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 61.748241][ C1] [ 61.750568][ C1] Freed by task 4114: [ 61.754533][ C1] save_stack+0x1b/0x40 [ 61.758660][ C1] __kasan_slab_free+0xf7/0x140 [ 61.763485][ C1] kmem_cache_free+0x7f/0x320 [ 61.768141][ C1] putname+0xe1/0x120 [ 61.772094][ C1] do_sys_openat2+0x467/0x7d0 [ 61.776751][ C1] do_sys_open+0xc3/0x140 [ 61.781054][ C1] do_syscall_64+0xf6/0x7d0 [ 61.785529][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 61.791386][ C1] [ 61.793696][ C1] The buggy address belongs to the object at ffff88809325a200 [ 61.793696][ C1] which belongs to the cache names_cache of size 4096 [ 61.807806][ C1] The buggy address is located 3583 bytes inside of [ 61.807806][ C1] 4096-byte region [ffff88809325a200, ffff88809325b200) [ 61.821216][ C1] The buggy address belongs to the page: [ 61.826833][ C1] page:ffffea00024c9680 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 head:ffffea00024c9680 order:1 compound_mapcount:0 [ 61.840247][ C1] flags: 0xfffe0000010200(slab|head) [ 61.845508][ C1] raw: 00fffe0000010200 ffffea00024ca208 ffffea00024ba708 ffff8880aa1ec000 [ 61.854064][ C1] raw: 0000000000000000 ffff88809325a200 0000000100000001 0000000000000000 [ 61.862624][ C1] page dumped because: kasan: bad access detected [ 61.869012][ C1] [ 61.871313][ C1] Memory state around the buggy address: [ 61.876946][ C1] ffff88809325ae80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.884983][ C1] ffff88809325af00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.893021][ C1] >ffff88809325af80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.901053][ C1] ^ [ 61.909024][ C1] ffff88809325b000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.917058][ C1] ffff88809325b080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.925099][ C1] ================================================================== [ 61.933127][ C1] Disabling lock debugging due to kernel taint [ 61.939327][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 61.945907][ C1] CPU: 1 PID: 16 Comm: ksoftirqd/1 Tainted: G B 5.7.0-rc6-syzkaller #0 [ 61.955436][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.965484][ C1] Call Trace: [ 61.968769][ C1] dump_stack+0x188/0x20d [ 61.973092][ C1] panic+0x2e3/0x75c [ 61.976961][ C1] ? add_taint.cold+0x16/0x16 [ 61.981612][ C1] ? ip_icmp_error+0x52a/0x5a0 [ 61.986350][ C1] ? trace_hardirqs_on+0x55/0x220 [ 61.991360][ C1] ? ip_icmp_error+0x52a/0x5a0 [ 61.996096][ C1] end_report+0x4d/0x53 [ 62.000223][ C1] __kasan_report.cold+0xd/0x38 [ 62.005055][ C1] ? ip_icmp_error+0x52a/0x5a0 [ 62.009788][ C1] ? ip_icmp_error+0x52a/0x5a0 [ 62.014532][ C1] kasan_report+0x33/0x50 [ 62.018831][ C1] ip_icmp_error+0x52a/0x5a0 [ 62.023409][ C1] tcp_v4_err+0x9b2/0x1d00 [ 62.027794][ C1] ? tcp_v4_do_rcv+0x8b0/0x8b0 [ 62.032530][ C1] icmp_socket_deliver+0x1e4/0x360 [ 62.037625][ C1] icmp_unreach+0x33b/0xab0 [ 62.042110][ C1] icmp_rcv+0xee6/0x15f0 [ 62.046327][ C1] ip_protocol_deliver_rcu+0x57/0x880 [ 62.051669][ C1] ip_local_deliver_finish+0x220/0x360 [ 62.057098][ C1] ip_local_deliver+0x1c8/0x4e0 [ 62.061960][ C1] ? ip_local_deliver_finish+0x360/0x360 [ 62.067567][ C1] ? ip_rcv+0x24e/0x3c0 [ 62.071696][ C1] ? ip_protocol_deliver_rcu+0x880/0x880 [ 62.077296][ C1] ? lock_downgrade+0x840/0x840 [ 62.082141][ C1] ? ip_rcv_finish_core.isra.0+0x606/0x1ec0 [ 62.088004][ C1] ip_rcv_finish+0x1da/0x2f0 [ 62.092586][ C1] ip_rcv+0xd0/0x3c0 [ 62.096451][ C1] ? ip_local_deliver+0x4e0/0x4e0 [ 62.101456][ C1] ? ip_rcv_finish_core.isra.0+0x1ec0/0x1ec0 [ 62.107405][ C1] ? ip_local_deliver+0x4e0/0x4e0 [ 62.112400][ C1] __netif_receive_skb_one_core+0x114/0x180 [ 62.118263][ C1] ? __netif_receive_skb_core+0x31c0/0x31c0 [ 62.124125][ C1] ? do_raw_spin_lock+0x129/0x2e0 [ 62.129116][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 62.134023][ C1] __netif_receive_skb+0x27/0x1c0 [ 62.139015][ C1] process_backlog+0x21e/0x7a0 [ 62.143748][ C1] ? net_rx_action+0x25f/0x1070 [ 62.148565][ C1] net_rx_action+0x4c2/0x1070 [ 62.153221][ C1] ? napi_busy_loop+0x9e0/0x9e0 [ 62.158042][ C1] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.163991][ C1] __do_softirq+0x26c/0x9f7 [ 62.168465][ C1] ? takeover_tasklets+0x810/0x810 [ 62.173648][ C1] run_ksoftirqd+0x89/0x100 [ 62.178119][ C1] smpboot_thread_fn+0x653/0x9e0 [ 62.183026][ C1] ? __smpboot_create_thread.part.0+0x340/0x340 [ 62.189233][ C1] ? __kthread_parkme+0x13f/0x1e0 [ 62.194230][ C1] ? __smpboot_create_thread.part.0+0x340/0x340 [ 62.200451][ C1] kthread+0x388/0x470 [ 62.204489][ C1] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.210177][ C1] ret_from_fork+0x24/0x30 [ 62.215726][ C1] Kernel Offset: disabled [ 62.220035][ C1] Rebooting in 86400 seconds..