IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready ip6_tunnel: l0 xmit: Local address not yet configured! ================================================================== BUG: KASAN: slab-out-of-bounds in __ptr_ring_produce include/linux/ptr_ring.h:107 [inline] BUG: KASAN: slab-out-of-bounds in ptr_ring_produce include/linux/ptr_ring.h:130 [inline] BUG: KASAN: slab-out-of-bounds in skb_array_produce include/linux/skb_array.h:48 [inline] BUG: KASAN: slab-out-of-bounds in tun_net_xmit+0x10b8/0x1180 drivers/net/tun.c:920 Read of size 8 at addr ffff8801da5166f8 by task ksoftirqd/1/17 CPU: 1 PID: 17 Comm: ksoftirqd/1 Not tainted 4.9.141+ #1 ffff8801da70f220 ffffffff81b42e79 ffffea0007694580 ffff8801da5166f8 0000000000000000 ffff8801da5166f8 ffff8801ce1ec108 ffff8801da70f258 ffffffff815009b8 ffff8801da5166f8 0000000000000008 0000000000000000 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] print_address_description+0x6c/0x234 mm/kasan/report.c:256 [] kasan_report_error mm/kasan/report.c:355 [inline] [] kasan_report.cold.6+0x242/0x2fe mm/kasan/report.c:412 [] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 [] __ptr_ring_produce include/linux/ptr_ring.h:107 [inline] [] ptr_ring_produce include/linux/ptr_ring.h:130 [inline] [] skb_array_produce include/linux/skb_array.h:48 [inline] [] tun_net_xmit+0x10b8/0x1180 drivers/net/tun.c:920 [] __netdev_start_xmit include/linux/netdevice.h:4069 [inline] [] netdev_start_xmit include/linux/netdevice.h:4078 [inline] [] xmit_one net/core/dev.c:2977 [inline] [] dev_hard_start_xmit+0x197/0x8b0 net/core/dev.c:2993 [] sch_direct_xmit+0x2b3/0x580 net/sched/sch_generic.c:182 [] __dev_xmit_skb net/core/dev.c:3173 [inline] [] __dev_queue_xmit+0x152e/0x1b90 net/core/dev.c:3441 [] dev_queue_xmit+0x17/0x20 net/core/dev.c:3506 [] neigh_hh_output include/net/neighbour.h:468 [inline] [] dst_neigh_output include/net/dst.h:468 [inline] [] ip6_finish_output2+0x1161/0x1d10 net/ipv6/ip6_output.c:119 [] ip6_finish_output+0x334/0x980 net/ipv6/ip6_output.c:145 [] NF_HOOK_COND include/linux/netfilter.h:246 [inline] [] ip6_output+0x1ea/0x6d0 net/ipv6/ip6_output.c:162 [] dst_output include/net/dst.h:507 [inline] [] NF_HOOK_THRESH include/linux/netfilter.h:232 [inline] [] NF_HOOK include/linux/netfilter.h:255 [inline] [] mld_sendpack+0xa1e/0xf80 net/ipv6/mcast.c:1659 [] mld_send_cr net/ipv6/mcast.c:1955 [inline] [] mld_ifc_timer_expire+0x3ba/0x7b0 net/ipv6/mcast.c:2455 [] call_timer_fn+0x163/0x6e0 kernel/time/timer.c:1319 [] expire_timers+0x234/0x580 kernel/time/timer.c:1359 [] __run_timers kernel/time/timer.c:1674 [inline] [] run_timer_softirq+0x208/0x5e0 kernel/time/timer.c:1687 [] __do_softirq+0x20e/0x964 kernel/softirq.c:288 [] run_ksoftirqd+0x30/0x60 kernel/softirq.c:680 [] smpboot_thread_fn+0x5c9/0x900 kernel/smpboot.c:163 [] kthread+0x26d/0x300 kernel/kthread.c:211 [] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373 Allocated by task 16963: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack mm/kasan/kasan.c:505 [inline] set_track mm/kasan/kasan.c:517 [inline] kasan_kmalloc.part.1+0x62/0xf0 mm/kasan/kasan.c:609 kasan_kmalloc+0xaf/0xc0 mm/kasan/kasan.c:594 __kmalloc+0x12f/0x310 mm/slub.c:3741 kmalloc_array include/linux/slab.h:582 [inline] kcalloc include/linux/slab.h:593 [inline] __ptr_ring_init_queue_alloc include/linux/ptr_ring.h:356 [inline] ptr_ring_resize_multiple include/linux/ptr_ring.h:445 [inline] skb_array_resize_multiple include/linux/skb_array.h:169 [inline] tun_queue_resize drivers/net/tun.c:2523 [inline] tun_device_event+0x3e0/0xa00 drivers/net/tun.c:2541 notifier_call_chain+0xb4/0x1d0 kernel/notifier.c:93 __raw_notifier_call_chain kernel/notifier.c:394 [inline] raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401 call_netdevice_notifiers_info+0x55/0x70 net/core/dev.c:1647 call_netdevice_notifiers+0x70/0xa0 net/core/dev.c:1663 do_setlink+0xc55/0x2ef0 net/core/rtnetlink.c:2052 rtnl_group_changelink net/core/rtnetlink.c:2423 [inline] rtnl_newlink+0xbd0/0x1550 net/core/rtnetlink.c:2571 rtnetlink_rcv_msg+0x49c/0x650 net/core/rtnetlink.c:4078 netlink_rcv_skb+0x145/0x370 net/netlink/af_netlink.c:2365 rtnetlink_rcv+0x2a/0x40 net/core/rtnetlink.c:4084 netlink_unicast_kernel net/netlink/af_netlink.c:1285 [inline] netlink_unicast+0x4d8/0x6d0 net/netlink/af_netlink.c:1311 netlink_sendmsg+0x694/0xc30 net/netlink/af_netlink.c:1859 sock_sendmsg_nosec net/socket.c:648 [inline] sock_sendmsg+0xbb/0x110 net/socket.c:658 ___sys_sendmsg+0x6fc/0x840 net/socket.c:1982 __sys_sendmsg+0xd9/0x190 net/socket.c:2016 SYSC_sendmsg net/socket.c:2027 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2023 do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285 entry_SYSCALL_64_after_swapgs+0x5d/0xdb Freed by task 3479: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack mm/kasan/kasan.c:505 [inline] set_track mm/kasan/kasan.c:517 [inline] kasan_slab_free+0xac/0x190 mm/kasan/kasan.c:582 slab_free_hook mm/slub.c:1355 [inline] slab_free_freelist_hook mm/slub.c:1377 [inline] slab_free mm/slub.c:2958 [inline] kfree+0xfb/0x310 mm/slub.c:3878 kfree_const+0x39/0x50 mm/util.c:35 kernfs_put+0x14f/0x580 fs/kernfs/dir.c:517 sysfs_put include/linux/sysfs.h:548 [inline] kobject_del.part.1+0x42/0xf0 lib/kobject.c:576 kobject_del lib/kobject.c:571 [inline] kobject_cleanup lib/kobject.c:637 [inline] kobject_release lib/kobject.c:672 [inline] kref_sub include/linux/kref.h:73 [inline] kref_put include/linux/kref.h:98 [inline] kobject_put+0x108/0x250 lib/kobject.c:689 net_rx_queue_update_kobjects+0x29e/0x3d0 net/core/net-sysfs.c:956 remove_queue_kobjects net/core/net-sysfs.c:1395 [inline] netdev_unregister_kobject+0x9d/0x110 net/core/net-sysfs.c:1530 rollback_registered_many+0x691/0xb50 net/core/dev.c:6883 unregister_netdevice_many+0x48/0x220 net/core/dev.c:7907 ip6_tnl_destroy_tunnels net/ipv6/ip6_tunnel.c:2192 [inline] ip6_tnl_exit_net+0x3dd/0x5b0 net/ipv6/ip6_tunnel.c:2239 ops_exit_list.isra.0+0xb0/0x160 net/core/net_namespace.c:136 cleanup_net+0x3f2/0x8b0 net/core/net_namespace.c:473 process_one_work+0x831/0x15f0 kernel/workqueue.c:2092 worker_thread+0xd6/0x1140 kernel/workqueue.c:2226 kthread+0x26d/0x300 kernel/kthread.c:211 ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373 The buggy address belongs to the object at ffff8801da5166f0 which belongs to the cache kmalloc-8 of size 8 The buggy address is located 0 bytes to the right of 8-byte region [ffff8801da5166f0, ffff8801da5166f8) The buggy address belongs to the page: page:ffffea0007694580 count:1 mapcount:0 mapping: (null) index:0xffff8801da5162e8 flags: 0x4000000000000080(slab) page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801da516580: fc fb fc fc fb fc fc fb fc fc fb fc fc fb fc fc ffff8801da516600: fb fc fc fb fc fc fb fc fc 00 fc fc 00 fc fc fb >ffff8801da516680: fc fc fb fc fc fb fc fc fb fc fc fb fc fc 00 fc ^ ffff8801da516700: fc fb fc fc 00 fc fc fb fc fc fb fc fc fb fc fc ffff8801da516780: 00 fc fc 00 fc fc fb fc fc fb fc fc fb fc fc fb ==================================================================