================================================================== BUG: KASAN: user-memory-access in fib6_drop_pcpu_from net/ipv6/ip6_fib.c:925 [inline] BUG: KASAN: user-memory-access in fib6_purge_rt+0x1b3/0x5e0 net/ipv6/ip6_fib.c:937 Write of size 8 at addr 0000000000001714 by task kworker/u4:7/9056 CPU: 1 PID: 9056 Comm: kworker/u4:7 Not tainted 5.2.0-rc1+ #5 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 __kasan_report.cold+0x5/0x40 mm/kasan/report.c:321 kasan_report+0x12/0x20 mm/kasan/common.c:614 check_memory_region_inline mm/kasan/generic.c:185 [inline] check_memory_region+0x123/0x190 mm/kasan/generic.c:191 kasan_check_write+0x14/0x20 mm/kasan/common.c:100 fib6_drop_pcpu_from net/ipv6/ip6_fib.c:925 [inline] fib6_purge_rt+0x1b3/0x5e0 net/ipv6/ip6_fib.c:937 fib6_del_route net/ipv6/ip6_fib.c:1820 [inline] fib6_del+0x9bd/0xeb0 net/ipv6/ip6_fib.c:1851 fib6_clean_node+0x3a5/0x590 net/ipv6/ip6_fib.c:2013 fib6_walk_continue+0x4a9/0x8e0 net/ipv6/ip6_fib.c:1935 fib6_walk+0x9d/0x100 net/ipv6/ip6_fib.c:1983 fib6_clean_tree+0xe0/0x120 net/ipv6/ip6_fib.c:2062 __fib6_clean_all+0x118/0x2a0 net/ipv6/ip6_fib.c:2078 fib6_clean_all+0x2b/0x40 net/ipv6/ip6_fib.c:2089 rt6_sync_down_dev+0x134/0x150 net/ipv6/route.c:4163 rt6_disable_ip+0x27/0x5f0 net/ipv6/route.c:4168 addrconf_ifdown+0xa2/0x1220 net/ipv6/addrconf.c:3709 addrconf_notify+0x5db/0x2270 net/ipv6/addrconf.c:3634 notifier_call_chain+0xc2/0x230 kernel/notifier.c:95 __raw_notifier_call_chain kernel/notifier.c:396 [inline] raw_notifier_call_chain+0x2e/0x40 kernel/notifier.c:403 call_netdevice_notifiers_info+0x3f/0x90 net/core/dev.c:1753 call_netdevice_notifiers_extack net/core/dev.c:1765 [inline] call_netdevice_notifiers net/core/dev.c:1779 [inline] dev_close_many+0x33f/0x6f0 net/core/dev.c:1522 rollback_registered_many+0x43b/0xfc0 net/core/dev.c:8193 unregister_netdevice_many.part.0+0x1b/0x1f0 net/core/dev.c:9324 unregister_netdevice_many+0x3b/0x50 net/core/dev.c:9323 ip_tunnel_delete_nets+0x41e/0x5f0 net/ipv4/ip_tunnel.c:1126 vti_exit_batch_net+0x23/0x30 net/ipv4/ip_vti.c:479 ops_exit_list.isra.0+0xfc/0x150 net/core/net_namespace.c:157 cleanup_net+0x3fb/0x960 net/core/net_namespace.c:553 process_one_work+0x989/0x1790 kernel/workqueue.c:2269 worker_thread+0x98/0xe40 kernel/workqueue.c:2415 kthread+0x354/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 ==================================================================