================================================================== BUG: KASAN: use-after-free in rht_key_hashfn include/linux/rhashtable.h:159 [inline] BUG: KASAN: use-after-free in __rhashtable_lookup include/linux/rhashtable.h:603 [inline] BUG: KASAN: use-after-free in rhashtable_lookup include/linux/rhashtable.h:645 [inline] BUG: KASAN: use-after-free in rhashtable_lookup_fast include/linux/rhashtable.h:671 [inline] BUG: KASAN: use-after-free in ila_lookup_wildcards net/ipv6/ila/ila_xlat.c:133 [inline] BUG: KASAN: use-after-free in ila_xlat_addr net/ipv6/ila/ila_xlat.c:650 [inline] BUG: KASAN: use-after-free in ila_nf_input+0xcf8/0xe60 net/ipv6/ila/ila_xlat.c:191 Read of size 4 at addr ffff8880700a1088 by task ksoftirqd/1/16 CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.2.0-rc1+ #9 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:188 __kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317 kasan_report+0x12/0x20 mm/kasan/common.c:614 __asan_report_load4_noabort+0x14/0x20 mm/kasan/generic_report.c:131 rht_key_hashfn include/linux/rhashtable.h:159 [inline] __rhashtable_lookup include/linux/rhashtable.h:603 [inline] rhashtable_lookup include/linux/rhashtable.h:645 [inline] rhashtable_lookup_fast include/linux/rhashtable.h:671 [inline] ila_lookup_wildcards net/ipv6/ila/ila_xlat.c:133 [inline] ila_xlat_addr net/ipv6/ila/ila_xlat.c:650 [inline] ila_nf_input+0xcf8/0xe60 net/ipv6/ila/ila_xlat.c:191 nf_hook_entry_hookfn include/linux/netfilter.h:135 [inline] nf_hook_slow+0xbc/0x1e0 net/netfilter/core.c:512 nf_hook include/linux/netfilter.h:260 [inline] NF_HOOK include/linux/netfilter.h:303 [inline] ipv6_rcv+0x25d/0x420 net/ipv6/ip6_input.c:276 __netif_receive_skb_one_core+0x113/0x1a0 net/core/dev.c:4990 __netif_receive_skb+0x2c/0x1d0 net/core/dev.c:5104 process_backlog+0x206/0x750 net/core/dev.c:5944 napi_poll net/core/dev.c:6367 [inline] net_rx_action+0x4f5/0x1070 net/core/dev.c:6433 __do_softirq+0x25c/0x94c kernel/softirq.c:293 run_ksoftirqd kernel/softirq.c:604 [inline] run_ksoftirqd+0x8e/0x110 kernel/softirq.c:596 smpboot_thread_fn+0x6a3/0xa30 kernel/smpboot.c:164 kthread+0x354/0x420 kernel/kthread.c:254 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Allocated by task 8681: save_stack+0x23/0x90 mm/kasan/common.c:71 set_track mm/kasan/common.c:79 [inline] __kasan_kmalloc mm/kasan/common.c:489 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:462 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:503 __do_kmalloc_node mm/slab.c:3620 [inline] __kmalloc_node+0x4e/0x70 mm/slab.c:3627 kmalloc_node include/linux/slab.h:590 [inline] kvmalloc_node+0xbd/0x100 mm/util.c:430 kvmalloc include/linux/mm.h:637 [inline] kvzalloc include/linux/mm.h:645 [inline] bucket_table_alloc+0x90/0x480 lib/rhashtable.c:178 rhashtable_init+0x3f4/0x7b0 lib/rhashtable.c:1057 ila_xlat_init_net+0x1df/0x2f0 net/ipv6/ila/ila_xlat.c:615 ila_init_net+0x16/0x20 net/ipv6/ila/ila_main.c:64 ops_init+0xb3/0x410 net/core/net_namespace.c:129 setup_net+0x2d3/0x740 net/core/net_namespace.c:315 copy_net_ns+0x1df/0x340 net/core/net_namespace.c:438 create_new_namespaces+0x400/0x7b0 kernel/nsproxy.c:107 unshare_nsproxy_namespaces+0xc2/0x200 kernel/nsproxy.c:206 ksys_unshare+0x440/0x980 kernel/fork.c:2691 __do_sys_unshare kernel/fork.c:2759 [inline] __se_sys_unshare kernel/fork.c:2757 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:2757 do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 235: save_stack+0x23/0x90 mm/kasan/common.c:71 set_track mm/kasan/common.c:79 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/common.c:451 kasan_slab_free+0xe/0x10 mm/kasan/common.c:459 __cache_free mm/slab.c:3432 [inline] kfree+0xcf/0x220 mm/slab.c:3755 kvfree+0x61/0x70 mm/util.c:459 bucket_table_free+0x69/0x150 lib/rhashtable.c:108 rhashtable_free_and_destroy+0x165/0x8b0 lib/rhashtable.c:1155 ila_xlat_exit_net+0x1a4/0x360 net/ipv6/ila/ila_xlat.c:624 ila_exit_net+0x16/0x20 net/ipv6/ila/ila_main.c:76 ops_exit_list.isra.0+0xaa/0x150 net/core/net_namespace.c:153 cleanup_net+0x3fb/0x960 net/core/net_namespace.c:552 process_one_work+0x989/0x1790 kernel/workqueue.c:2268 worker_thread+0x98/0xe40 kernel/workqueue.c:2414 kthread+0x354/0x420 kernel/kthread.c:254 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 The buggy address belongs to the object at ffff8880700a1080 which belongs to the cache kmalloc-32k of size 32768 The buggy address is located 8 bytes inside of 32768-byte region [ffff8880700a1080, ffff8880700a9080) The buggy address belongs to the page: page:ffffea0001c02800 refcount:1 mapcount:0 mapping:ffff8880aa402380 index:0x0 compound_mapcount: 0 flags: 0x1fffc0000010200(slab|head) raw: 01fffc0000010200 ffffea0001c4fc08 ffffea0001b85808 ffff8880aa402380 raw: 0000000000000000 ffff8880700a1080 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880700a0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880700a1000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880700a1080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880700a1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880700a1180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================