Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.121' (ECDSA) to the list of known hosts. syzkaller login: [ 64.557897][ T6807] IPVS: ftp: loaded support on port[0] = 21 [ 64.652588][ T6807] chnl_net:caif_netlink_parms(): no params data found [ 64.702160][ T6807] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.709960][ T6807] bridge0: port 1(bridge_slave_0) entered disabled state [ 64.717978][ T6807] device bridge_slave_0 entered promiscuous mode [ 64.726376][ T6807] bridge0: port 2(bridge_slave_1) entered blocking state [ 64.733756][ T6807] bridge0: port 2(bridge_slave_1) entered disabled state [ 64.741627][ T6807] device bridge_slave_1 entered promiscuous mode [ 64.761570][ T6807] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 64.773395][ T6807] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 64.796635][ T6807] team0: Port device team_slave_0 added [ 64.804233][ T6807] team0: Port device team_slave_1 added [ 64.821475][ T6807] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 64.828919][ T6807] 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. [ 64.854964][ T6807] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 64.867916][ T6807] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 64.874878][ T6807] 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. [ 64.901156][ T6807] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 64.971207][ T6807] device hsr_slave_0 entered promiscuous mode [ 65.038176][ T6807] device hsr_slave_1 entered promiscuous mode [ 65.173462][ T6807] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 65.230365][ T6807] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 65.280183][ T6807] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 65.339584][ T6807] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 65.394288][ T6807] bridge0: port 2(bridge_slave_1) entered blocking state [ 65.402062][ T6807] bridge0: port 2(bridge_slave_1) entered forwarding state [ 65.410105][ T6807] bridge0: port 1(bridge_slave_0) entered blocking state [ 65.417426][ T6807] bridge0: port 1(bridge_slave_0) entered forwarding state [ 65.463114][ T6807] 8021q: adding VLAN 0 to HW filter on device bond0 [ 65.476499][ T2710] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 65.489249][ T2710] bridge0: port 1(bridge_slave_0) entered disabled state [ 65.498321][ T2710] bridge0: port 2(bridge_slave_1) entered disabled state [ 65.508527][ T2710] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 65.521141][ T6807] 8021q: adding VLAN 0 to HW filter on device team0 [ 65.532070][ T2511] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 65.541356][ T2511] bridge0: port 1(bridge_slave_0) entered blocking state [ 65.548805][ T2511] bridge0: port 1(bridge_slave_0) entered forwarding state [ 65.561328][ T2710] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 65.570162][ T2710] bridge0: port 2(bridge_slave_1) entered blocking state [ 65.577202][ T2710] bridge0: port 2(bridge_slave_1) entered forwarding state [ 65.600258][ T6744] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 65.609187][ T6744] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 65.619571][ T6744] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 65.631722][ T6744] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 65.643344][ T2719] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 65.652558][ T2719] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 65.663893][ T6807] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 65.683852][ T6744] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 65.695232][ T6744] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 65.711243][ T6807] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 65.737591][ T2719] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 65.746346][ T2719] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 65.764739][ T6744] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 65.773504][ T6744] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 65.784322][ T2511] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 65.793163][ T2511] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 65.802854][ T6807] device veth0_vlan entered promiscuous mode [ 65.815317][ T6807] device veth1_vlan entered promiscuous mode [ 65.837984][ T2719] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 65.849412][ T2719] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 65.858467][ T2719] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 65.866971][ T2719] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 65.878540][ T6807] device veth0_macvtap entered promiscuous mode [ 65.889569][ T6807] device veth1_macvtap entered promiscuous mode [ 65.906306][ T6807] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 65.914496][ T2719] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 65.924064][ T2719] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 65.932610][ T2719] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 65.941823][ T2719] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 65.954430][ T6807] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 65.962411][ T2511] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 65.972684][ T2511] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 69.297802][ C0] ================================================================== [ 69.306064][ C0] BUG: KASAN: slab-out-of-bounds in ip_icmp_error+0x52a/0x5a0 [ 69.313515][ C0] Read of size 1 at addr ffff88808c9a97ff by task ksoftirqd/0/9 [ 69.321124][ C0] [ 69.323508][ C0] CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 5.7.0-rc7-next-20200526-syzkaller #0 [ 69.332773][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.342830][ C0] Call Trace: [ 69.346104][ C0] dump_stack+0x18f/0x20d [ 69.350435][ C0] ? ip_icmp_error+0x52a/0x5a0 [ 69.355209][ C0] ? ip_icmp_error+0x52a/0x5a0 [ 69.359968][ C0] print_address_description.constprop.0.cold+0xd3/0x413 [ 69.367149][ C0] ? memcpy+0x39/0x60 [ 69.371202][ C0] ? vprintk_func+0x97/0x1a6 [ 69.375807][ C0] ? ip_icmp_error+0x52a/0x5a0 [ 69.380730][ C0] kasan_report.cold+0x1f/0x37 [ 69.385485][ C0] ? skb_clone+0x190/0x3c0 [ 69.389896][ C0] ? ip_icmp_error+0x52a/0x5a0 [ 69.394638][ C0] ip_icmp_error+0x52a/0x5a0 [ 69.399313][ C0] tcp_v4_err+0x99e/0x1ce0 [ 69.404769][ C0] ? tcp_v4_do_rcv+0x8b0/0x8b0 [ 69.409520][ C0] icmp_socket_deliver+0x1e1/0x360 [ 69.414624][ C0] icmp_unreach+0x33b/0xab0 [ 69.419137][ C0] icmp_rcv+0xee6/0x15f0 [ 69.423375][ C0] ip_protocol_deliver_rcu+0x57/0x880 [ 69.428725][ C0] ? check_preemption_disabled+0x38/0x220 [ 69.434437][ C0] ip_local_deliver_finish+0x220/0x360 [ 69.439973][ C0] ip_local_deliver+0x1c8/0x4e0 [ 69.444799][ C0] ? ip_local_deliver_finish+0x360/0x360 [ 69.450589][ C0] ? ip_rcv+0x244/0x3c0 [ 69.454722][ C0] ? ip_protocol_deliver_rcu+0x880/0x880 [ 69.460329][ C0] ? lock_downgrade+0x840/0x840 [ 69.465167][ C0] ? ip_rcv_finish_core.isra.0+0x606/0x1ea0 [ 69.471051][ C0] ip_rcv_finish+0x1da/0x2f0 [ 69.475619][ C0] ip_rcv+0xd0/0x3c0 [ 69.479492][ C0] ? ip_local_deliver+0x4e0/0x4e0 [ 69.484495][ C0] ? ip_rcv_finish_core.isra.0+0x1ea0/0x1ea0 [ 69.490453][ C0] ? ip_local_deliver+0x4e0/0x4e0 [ 69.495488][ C0] __netif_receive_skb_one_core+0x114/0x180 [ 69.501374][ C0] ? __netif_receive_skb_core+0x33f0/0x33f0 [ 69.507249][ C0] ? do_raw_spin_lock+0x120/0x2d0 [ 69.512272][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 69.517377][ C0] __netif_receive_skb+0x27/0x1c0 [ 69.522741][ C0] process_backlog+0x21e/0x7a0 [ 69.528012][ C0] ? lockdep_hardirqs_on_prepare+0x1bc/0x590 [ 69.533976][ C0] net_rx_action+0x4e1/0x10d0 [ 69.538666][ C0] ? napi_busy_loop+0x9e0/0x9e0 [ 69.543503][ C0] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 69.549465][ C0] ? lockdep_hardirqs_on_prepare+0x1bc/0x590 [ 69.555528][ C0] __do_softirq+0x268/0x9ee [ 69.560029][ C0] ? takeover_tasklets+0x810/0x810 [ 69.565125][ C0] run_ksoftirqd+0x89/0x100 [ 69.569634][ C0] smpboot_thread_fn+0x653/0x9e0 [ 69.574731][ C0] ? smpboot_register_percpu_thread+0x370/0x370 [ 69.581053][ C0] ? __kthread_parkme+0x13f/0x1e0 [ 69.586147][ C0] ? smpboot_register_percpu_thread+0x370/0x370 [ 69.592377][ C0] kthread+0x3b5/0x4a0 [ 69.596432][ C0] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 69.602130][ C0] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 69.607832][ C0] ret_from_fork+0x1f/0x30 [ 69.612231][ C0] [ 69.614540][ C0] Allocated by task 1: [ 69.618584][ C0] save_stack+0x1b/0x40 [ 69.622726][ C0] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 69.628330][ C0] __kmalloc+0x161/0x7a0 [ 69.632547][ C0] tomoyo_realpath_from_path+0xc2/0x620 [ 69.638068][ C0] tomoyo_path_perm+0x214/0x400 [ 69.642898][ C0] security_inode_getattr+0xeb/0x150 [ 69.648293][ C0] vfs_getattr+0x22/0x60 [ 69.652525][ C0] vfs_statx+0x177/0x370 [ 69.656753][ C0] __do_sys_newlstat+0x91/0x110 [ 69.661584][ C0] do_syscall_64+0x60/0xe0 [ 69.665990][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 69.671852][ C0] [ 69.674155][ C0] Freed by task 1: [ 69.677850][ C0] save_stack+0x1b/0x40 [ 69.681976][ C0] __kasan_slab_free+0xf7/0x140 [ 69.686821][ C0] kfree+0x109/0x2b0 [ 69.690690][ C0] tomoyo_realpath_from_path+0x18f/0x620 [ 69.696305][ C0] tomoyo_path_perm+0x214/0x400 [ 69.701129][ C0] security_inode_getattr+0xeb/0x150 [ 69.706394][ C0] vfs_getattr+0x22/0x60 [ 69.710707][ C0] vfs_statx+0x177/0x370 [ 69.714932][ C0] __do_sys_newlstat+0x91/0x110 [ 69.719769][ C0] do_syscall_64+0x60/0xe0 [ 69.724162][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 69.730020][ C0] [ 69.732324][ C0] The buggy address belongs to the object at ffff88808c9a8000 [ 69.732324][ C0] which belongs to the cache kmalloc-4k of size 4096 [ 69.746350][ C0] The buggy address is located 2047 bytes to the right of [ 69.746350][ C0] 4096-byte region [ffff88808c9a8000, ffff88808c9a9000) [ 69.760475][ C0] The buggy address belongs to the page: [ 69.766139][ C0] page:ffffea0002326a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 head:ffffea0002326a00 order:1 compound_mapcount:0 [ 69.779582][ C0] flags: 0xfffe0000010200(slab|head) [ 69.784862][ C0] raw: 00fffe0000010200 ffffea00029a9608 ffffea0002997a88 ffff8880aa002000 [ 69.793443][ C0] raw: 0000000000000000 ffff88808c9a8000 0000000100000001 0000000000000000 [ 69.801998][ C0] page dumped because: kasan: bad access detected [ 69.808379][ C0] [ 69.810687][ C0] Memory state around the buggy address: [ 69.816290][ C0] ffff88808c9a9680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 69.824334][ C0] ffff88808c9a9700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 69.832406][ C0] >ffff88808c9a9780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 69.840439][ C0] ^ [ 69.848388][ C0] ffff88808c9a9800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 69.856437][ C0] ffff88808c9a9880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 69.864470][ C0] ================================================================== [ 69.872521][ C0] Disabling lock debugging due to kernel taint [ 69.878724][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 69.885308][ C0] CPU: 0 PID: 9 Comm: ksoftirqd/0 Tainted: G B 5.7.0-rc7-next-20200526-syzkaller #0 [ 69.897304][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.907963][ C0] Call Trace: [ 69.911252][ C0] dump_stack+0x18f/0x20d [ 69.915600][ C0] ? ip_icmp_error+0x4f0/0x5a0 [ 69.920353][ C0] panic+0x2e3/0x75c [ 69.924233][ C0] ? __warn_printk+0xf3/0xf3 [ 69.928808][ C0] ? ip_icmp_error+0x52a/0x5a0 [ 69.933543][ C0] ? trace_hardirqs_on+0x55/0x220 [ 69.938542][ C0] ? ip_icmp_error+0x52a/0x5a0 [ 69.943311][ C0] ? ip_icmp_error+0x52a/0x5a0 [ 69.948059][ C0] end_report+0x4d/0x53 [ 69.952306][ C0] kasan_report.cold+0xd/0x37 [ 69.956974][ C0] ? skb_clone+0x190/0x3c0 [ 69.961366][ C0] ? ip_icmp_error+0x52a/0x5a0 [ 69.966102][ C0] ip_icmp_error+0x52a/0x5a0 [ 69.970667][ C0] tcp_v4_err+0x99e/0x1ce0 [ 69.975425][ C0] ? tcp_v4_do_rcv+0x8b0/0x8b0 [ 69.980408][ C0] icmp_socket_deliver+0x1e1/0x360 [ 69.985498][ C0] icmp_unreach+0x33b/0xab0 [ 69.990100][ C0] icmp_rcv+0xee6/0x15f0 [ 69.994328][ C0] ip_protocol_deliver_rcu+0x57/0x880 [ 69.999713][ C0] ? check_preemption_disabled+0x38/0x220 [ 70.005431][ C0] ip_local_deliver_finish+0x220/0x360 [ 70.011114][ C0] ip_local_deliver+0x1c8/0x4e0 [ 70.015943][ C0] ? ip_local_deliver_finish+0x360/0x360 [ 70.021561][ C0] ? ip_rcv+0x244/0x3c0 [ 70.025712][ C0] ? ip_protocol_deliver_rcu+0x880/0x880 [ 70.031323][ C0] ? lock_downgrade+0x840/0x840 [ 70.036162][ C0] ? ip_rcv_finish_core.isra.0+0x606/0x1ea0 [ 70.042033][ C0] ip_rcv_finish+0x1da/0x2f0 [ 70.046609][ C0] ip_rcv+0xd0/0x3c0 [ 70.050476][ C0] ? ip_local_deliver+0x4e0/0x4e0 [ 70.055482][ C0] ? ip_rcv_finish_core.isra.0+0x1ea0/0x1ea0 [ 70.061434][ C0] ? ip_local_deliver+0x4e0/0x4e0 [ 70.066437][ C0] __netif_receive_skb_one_core+0x114/0x180 [ 70.072311][ C0] ? __netif_receive_skb_core+0x33f0/0x33f0 [ 70.078188][ C0] ? do_raw_spin_lock+0x120/0x2d0 [ 70.083194][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 70.088104][ C0] __netif_receive_skb+0x27/0x1c0 [ 70.093111][ C0] process_backlog+0x21e/0x7a0 [ 70.097849][ C0] ? lockdep_hardirqs_on_prepare+0x1bc/0x590 [ 70.103815][ C0] net_rx_action+0x4e1/0x10d0 [ 70.108468][ C0] ? napi_busy_loop+0x9e0/0x9e0 [ 70.113298][ C0] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 70.119343][ C0] ? lockdep_hardirqs_on_prepare+0x1bc/0x590 [ 70.125295][ C0] __do_softirq+0x268/0x9ee [ 70.129863][ C0] ? takeover_tasklets+0x810/0x810 [ 70.135215][ C0] run_ksoftirqd+0x89/0x100 [ 70.139711][ C0] smpboot_thread_fn+0x653/0x9e0 [ 70.144632][ C0] ? smpboot_register_percpu_thread+0x370/0x370 [ 70.150853][ C0] ? __kthread_parkme+0x13f/0x1e0 [ 70.155860][ C0] ? smpboot_register_percpu_thread+0x370/0x370 [ 70.162072][ C0] kthread+0x3b5/0x4a0 [ 70.166121][ C0] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 70.171908][ C0] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 70.177648][ C0] ret_from_fork+0x1f/0x30 [ 70.183473][ C0] Kernel Offset: disabled [ 70.187791][ C0] Rebooting in 86400 seconds..