Warning: Permanently added '10.128.0.130' (ECDSA) to the list of known hosts. 2020/08/15 21:26:58 parsed 1 programs 2020/08/15 21:26:58 executed programs: 0 syzkaller login: [ 45.533359][ T6841] IPVS: ftp: loaded support on port[0] = 21 [ 45.670737][ T6841] chnl_net:caif_netlink_parms(): no params data found [ 45.729746][ T6841] bridge0: port 1(bridge_slave_0) entered blocking state [ 45.737056][ T6841] bridge0: port 1(bridge_slave_0) entered disabled state [ 45.745664][ T6841] device bridge_slave_0 entered promiscuous mode [ 45.755431][ T6841] bridge0: port 2(bridge_slave_1) entered blocking state [ 45.762978][ T6841] bridge0: port 2(bridge_slave_1) entered disabled state [ 45.771711][ T6841] device bridge_slave_1 entered promiscuous mode [ 45.790390][ T6841] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 45.801167][ T6841] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 45.822669][ T6841] team0: Port device team_slave_0 added [ 45.830839][ T6841] team0: Port device team_slave_1 added [ 45.847471][ T6841] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 45.854534][ T6841] 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. [ 45.881426][ T6841] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 45.893852][ T6841] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 45.901426][ T6841] 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. [ 45.927893][ T6841] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 45.952885][ T6841] device hsr_slave_0 entered promiscuous mode [ 45.959522][ T6841] device hsr_slave_1 entered promiscuous mode [ 46.044222][ T6841] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 46.053674][ T6841] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 46.071155][ T6841] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 46.084421][ T6841] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 46.107644][ T6841] bridge0: port 2(bridge_slave_1) entered blocking state [ 46.114797][ T6841] bridge0: port 2(bridge_slave_1) entered forwarding state [ 46.122553][ T6841] bridge0: port 1(bridge_slave_0) entered blocking state [ 46.129681][ T6841] bridge0: port 1(bridge_slave_0) entered forwarding state [ 46.186233][ T6841] 8021q: adding VLAN 0 to HW filter on device bond0 [ 46.203855][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 46.219817][ T2938] bridge0: port 1(bridge_slave_0) entered disabled state [ 46.229045][ T2938] bridge0: port 2(bridge_slave_1) entered disabled state [ 46.239952][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 46.253675][ T6841] 8021q: adding VLAN 0 to HW filter on device team0 [ 46.267167][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 46.276011][ T17] bridge0: port 1(bridge_slave_0) entered blocking state [ 46.283139][ T17] bridge0: port 1(bridge_slave_0) entered forwarding state [ 46.295371][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 46.304497][ T2938] bridge0: port 2(bridge_slave_1) entered blocking state [ 46.311599][ T2938] bridge0: port 2(bridge_slave_1) entered forwarding state [ 46.329505][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 46.338076][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 46.355850][ T6841] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 46.367227][ T6841] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 46.380658][ T6492] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 46.389718][ T6492] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 46.397970][ T6492] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 46.407459][ T6492] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 46.425145][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 46.433865][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 46.445833][ T6841] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 46.463724][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 46.483002][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 46.491544][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 46.499924][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 46.511533][ T6841] device veth0_vlan entered promiscuous mode [ 46.522992][ T6841] device veth1_vlan entered promiscuous mode [ 46.542585][ T6492] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 46.551011][ T6492] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 46.559945][ T6492] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 46.571191][ T6841] device veth0_macvtap entered promiscuous mode [ 46.580921][ T6841] device veth1_macvtap entered promiscuous mode [ 46.596020][ T6841] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 46.604455][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 46.615055][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 46.626598][ T6841] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 46.634905][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 46.647829][ T6841] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 46.656740][ T6841] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 46.665729][ T6841] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 46.674502][ T6841] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 47.313217][ T7087] team0 (unregistering): Port device team_slave_0 removed [ 47.409162][ T7087] team0 (unregistering): Port device team_slave_1 removed [ 47.569309][ T17] Bluetooth: hci0: command 0x0409 tx timeout [ 48.461727][ T7165] bridge0: port 1(bridge_slave_0) entered disabled state [ 48.635302][ T7165] device bridge_slave_0 left promiscuous mode [ 48.642239][ T7165] bridge0: port 1(bridge_slave_0) entered disabled state [ 48.948081][ T7178] bond0: (slave bond_slave_0): Releasing backup interface [ 49.257290][ T7191] bond0: (slave bond_slave_1): Releasing backup interface 2020/08/15 21:27:03 executed programs: 12 [ 49.646940][ T7217] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 49.654931][ T6492] Bluetooth: hci0: command 0x041b tx timeout [ 49.936502][ T7217] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 50.292005][ T7230] device hsr_slave_0 left promiscuous mode [ 50.397730][ T7244] device hsr_slave_1 left promiscuous mode [ 51.727196][ T6492] Bluetooth: hci0: command 0x040f tx timeout [ 53.806880][ T6492] Bluetooth: hci0: command 0x0419 tx timeout 2020/08/15 21:27:08 executed programs: 44 [ 56.288731][ T0] NOHZ: local_softirq_pending 08 2020/08/15 21:27:13 executed programs: 91 [ 63.086886][ T8649] ================================================================== [ 63.095079][ T8649] BUG: KASAN: use-after-free in free_netdev+0x186/0x350 [ 63.101991][ T8649] Read of size 8 at addr ffff888092c0e6f8 by task syz-executor.0/8649 [ 63.110140][ T8649] [ 63.112494][ T8649] CPU: 0 PID: 8649 Comm: syz-executor.0 Not tainted 5.8.0-syzkaller #0 [ 63.120696][ T8649] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.130722][ T8649] Call Trace: [ 63.133991][ T8649] dump_stack+0x1f0/0x31e [ 63.138298][ T8649] print_address_description+0x66/0x620 [ 63.143820][ T8649] ? printk+0x62/0x83 [ 63.147781][ T8649] ? vprintk_emit+0x339/0x3c0 [ 63.152443][ T8649] kasan_report+0x132/0x1d0 [ 63.156962][ T8649] ? free_netdev+0x186/0x350 [ 63.161532][ T8649] free_netdev+0x186/0x350 [ 63.165939][ T8649] netdev_run_todo+0xaaa/0xc90 [ 63.170685][ T8649] rtnetlink_rcv_msg+0x890/0xd40 [ 63.175610][ T8649] ? trace_lock_release+0x137/0x1a0 [ 63.180785][ T8649] ? __local_bh_enable_ip+0xe7/0x180 [ 63.186054][ T8649] ? local_bh_enable+0x5/0x20 [ 63.190719][ T8649] ? lockdep_hardirqs_on+0x49/0xf0 [ 63.195839][ T8649] ? local_bh_enable+0x5/0x20 [ 63.200488][ T8649] ? __local_bh_enable_ip+0xe7/0x180 [ 63.205754][ T8649] ? __dev_queue_xmit+0x1846/0x2940 [ 63.210959][ T8649] netlink_rcv_skb+0x190/0x3a0 [ 63.215704][ T8649] ? rtnetlink_bind+0x80/0x80 [ 63.220370][ T8649] netlink_unicast+0x786/0x940 [ 63.225127][ T8649] netlink_sendmsg+0xa57/0xd70 [ 63.229883][ T8649] ? netlink_getsockopt+0x9e0/0x9e0 [ 63.235055][ T8649] ____sys_sendmsg+0x519/0x800 [ 63.239793][ T8649] ? import_iovec+0x12a/0x2c0 [ 63.244457][ T8649] __sys_sendmsg+0x2b1/0x360 [ 63.249032][ T8649] ? trace_lock_release+0x137/0x1a0 [ 63.254237][ T8649] ? __might_fault+0xf5/0x150 [ 63.258892][ T8649] ? lock_is_held_type+0xb3/0xe0 [ 63.263931][ T8649] ? syscall_enter_from_user_mode+0x24/0x190 [ 63.269888][ T8649] ? lockdep_hardirqs_on+0x49/0xf0 [ 63.274977][ T8649] ? syscall_enter_from_user_mode+0x24/0x190 [ 63.280932][ T8649] do_syscall_64+0x31/0x70 [ 63.285323][ T8649] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 63.291201][ T8649] RIP: 0033:0x45d239 [ 63.295069][ T8649] Code: 5d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 63.314669][ T8649] RSP: 002b:00007f3a8e18fc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 63.323068][ T8649] RAX: ffffffffffffffda RBX: 000000000002c0c0 RCX: 000000000045d239 [ 63.331028][ T8649] RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000005 [ 63.338973][ T8649] RBP: 000000000118d020 R08: 0000000000000000 R09: 0000000000000000 [ 63.346919][ T8649] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cfec [ 63.354866][ T8649] R13: 00007fffb95f29ff R14: 00007f3a8e1909c0 R15: 000000000118cfec [ 63.362835][ T8649] [ 63.365135][ T8649] Allocated by task 8642: [ 63.369441][ T8649] __kasan_kmalloc+0x100/0x130 [ 63.374181][ T8649] __kmalloc+0x218/0x320 [ 63.378412][ T8649] sk_prot_alloc+0xa7/0x2b0 [ 63.382888][ T8649] sk_alloc+0x35/0x300 [ 63.386928][ T8649] tun_chr_open+0x77/0x470 [ 63.391321][ T8649] misc_open+0x346/0x3c0 [ 63.395546][ T8649] chrdev_open+0x498/0x580 [ 63.399951][ T8649] do_dentry_open+0x7c8/0x1010 [ 63.404686][ T8649] path_openat+0x2794/0x3840 [ 63.409250][ T8649] do_filp_open+0x191/0x3a0 [ 63.413725][ T8649] do_sys_openat2+0x463/0x830 [ 63.418373][ T8649] __x64_sys_openat+0x1c8/0x1f0 [ 63.423195][ T8649] do_syscall_64+0x31/0x70 [ 63.427585][ T8649] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 63.433443][ T8649] [ 63.435755][ T8649] Freed by task 8641: [ 63.439711][ T8649] kasan_set_track+0x3d/0x70 [ 63.444286][ T8649] kasan_set_free_info+0x17/0x30 [ 63.449196][ T8649] __kasan_slab_free+0xdd/0x110 [ 63.454035][ T8649] kfree+0x10a/0x220 [ 63.457910][ T8649] __sk_destruct+0x612/0x770 [ 63.462481][ T8649] tun_chr_close+0x113/0x130 [ 63.467044][ T8649] __fput+0x34f/0x7b0 [ 63.470997][ T8649] task_work_run+0x137/0x1c0 [ 63.475560][ T8649] exit_to_user_mode_prepare+0xfa/0x1b0 [ 63.481093][ T8649] syscall_exit_to_user_mode+0x5e/0x1a0 [ 63.486608][ T8649] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 63.492465][ T8649] [ 63.494785][ T8649] The buggy address belongs to the object at ffff888092c0e000 [ 63.494785][ T8649] which belongs to the cache kmalloc-4k of size 4096 [ 63.508808][ T8649] The buggy address is located 1784 bytes inside of [ 63.508808][ T8649] 4096-byte region [ffff888092c0e000, ffff888092c0f000) [ 63.522218][ T8649] The buggy address belongs to the page: [ 63.527825][ T8649] page:00000000c0edd815 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x92c0e [ 63.537949][ T8649] head:00000000c0edd815 order:1 compound_mapcount:0 [ 63.544521][ T8649] flags: 0xfffe0000010200(slab|head) [ 63.549816][ T8649] raw: 00fffe0000010200 ffffea00024b0308 ffffea00024a6788 ffff8880aa440900 [ 63.558374][ T8649] raw: 0000000000000000 ffff888092c0e000 0000000100000001 0000000000000000 [ 63.566929][ T8649] page dumped because: kasan: bad access detected [ 63.573317][ T8649] [ 63.575618][ T8649] Memory state around the buggy address: [ 63.581227][ T8649] ffff888092c0e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.589271][ T8649] ffff888092c0e600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.597318][ T8649] >ffff888092c0e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.605361][ T8649] ^ [ 63.613318][ T8649] ffff888092c0e700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.621361][ T8649] ffff888092c0e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.629403][ T8649] ================================================================== [ 63.637473][ T8649] Disabling lock debugging due to kernel taint [ 63.656374][ T8649] Kernel panic - not syncing: panic_on_warn set ... [ 63.662994][ T8649] CPU: 0 PID: 8649 Comm: syz-executor.0 Tainted: G B 5.8.0-syzkaller #0 [ 63.672693][ T8649] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.682720][ T8649] Call Trace: [ 63.686016][ T8649] dump_stack+0x1f0/0x31e [ 63.690333][ T8649] panic+0x264/0x7a0 [ 63.694203][ T8649] ? trace_hardirqs_on+0x30/0x80 [ 63.699111][ T8649] kasan_report+0x1c9/0x1d0 [ 63.703587][ T8649] ? free_netdev+0x186/0x350 [ 63.708151][ T8649] free_netdev+0x186/0x350 [ 63.712553][ T8649] netdev_run_todo+0xaaa/0xc90 [ 63.717293][ T8649] rtnetlink_rcv_msg+0x890/0xd40 [ 63.722209][ T8649] ? trace_lock_release+0x137/0x1a0 [ 63.727390][ T8649] ? __local_bh_enable_ip+0xe7/0x180 [ 63.732659][ T8649] ? local_bh_enable+0x5/0x20 [ 63.737322][ T8649] ? lockdep_hardirqs_on+0x49/0xf0 [ 63.742418][ T8649] ? local_bh_enable+0x5/0x20 [ 63.747078][ T8649] ? __local_bh_enable_ip+0xe7/0x180 [ 63.752346][ T8649] ? __dev_queue_xmit+0x1846/0x2940 [ 63.757521][ T8649] netlink_rcv_skb+0x190/0x3a0 [ 63.762271][ T8649] ? rtnetlink_bind+0x80/0x80 [ 63.766922][ T8649] netlink_unicast+0x786/0x940 [ 63.771673][ T8649] netlink_sendmsg+0xa57/0xd70 [ 63.776426][ T8649] ? netlink_getsockopt+0x9e0/0x9e0 [ 63.781596][ T8649] ____sys_sendmsg+0x519/0x800 [ 63.786333][ T8649] ? import_iovec+0x12a/0x2c0 [ 63.790998][ T8649] __sys_sendmsg+0x2b1/0x360 [ 63.795657][ T8649] ? trace_lock_release+0x137/0x1a0 [ 63.800860][ T8649] ? __might_fault+0xf5/0x150 [ 63.805511][ T8649] ? lock_is_held_type+0xb3/0xe0 [ 63.810437][ T8649] ? syscall_enter_from_user_mode+0x24/0x190 [ 63.816389][ T8649] ? lockdep_hardirqs_on+0x49/0xf0 [ 63.821471][ T8649] ? syscall_enter_from_user_mode+0x24/0x190 [ 63.827427][ T8649] do_syscall_64+0x31/0x70 [ 63.831819][ T8649] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 63.837681][ T8649] RIP: 0033:0x45d239 [ 63.842624][ T8649] Code: 5d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 63.862212][ T8649] RSP: 002b:00007f3a8e18fc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 63.870597][ T8649] RAX: ffffffffffffffda RBX: 000000000002c0c0 RCX: 000000000045d239 [ 63.878542][ T8649] RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000005 [ 63.886500][ T8649] RBP: 000000000118d020 R08: 0000000000000000 R09: 0000000000000000 [ 63.894445][ T8649] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cfec [ 63.902397][ T8649] R13: 00007fffb95f29ff R14: 00007f3a8e1909c0 R15: 000000000118cfec [ 63.911346][ T8649] Kernel Offset: disabled [ 63.915655][ T8649] Rebooting in 86400 seconds..