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BUG: KASAN: use-after-free in rht_key_hashfn include/linux/rhashtable.h:143 [inline]
BUG: KASAN: use-after-free in __rhashtable_lookup include/linux/rhashtable.h:492 [inline]
BUG: KASAN: use-after-free in rhashtable_lookup include/linux/rhashtable.h:534 [inline]
BUG: KASAN: use-after-free in rhashtable_lookup_fast include/linux/rhashtable.h:560 [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:649 [inline]
BUG: KASAN: use-after-free in ila_nf_input+0xcd7/0xe00 net/ipv6/ila/ila_xlat.c:191
Read of size 4 at addr ffff888089162b4c by task ksoftirqd/1/16
CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.0.0+ #138
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:187
kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317
__asan_report_load4_noabort+0x14/0x20 mm/kasan/generic_report.c:131
rht_key_hashfn include/linux/rhashtable.h:143 [inline]
__rhashtable_lookup include/linux/rhashtable.h:492 [inline]
rhashtable_lookup include/linux/rhashtable.h:534 [inline]
rhashtable_lookup_fast include/linux/rhashtable.h:560 [inline]
ila_lookup_wildcards net/ipv6/ila/ila_xlat.c:133 [inline]
ila_xlat_addr net/ipv6/ila/ila_xlat.c:649 [inline]
ila_nf_input+0xcd7/0xe00 net/ipv6/ila/ila_xlat.c:191
nf_hook_entry_hookfn include/linux/netfilter.h:119 [inline]
nf_hook_slow+0xbf/0x1f0 net/netfilter/core.c:511
nf_hook include/linux/netfilter.h:244 [inline]
NF_HOOK include/linux/netfilter.h:287 [inline]
br_nf_pre_routing_ipv6+0x57d/0x810 net/bridge/br_netfilter_ipv6.c:240
br_nf_pre_routing+0xf2e/0x14b0 net/bridge/br_netfilter_hooks.c:482
nf_hook_entry_hookfn include/linux/netfilter.h:119 [inline]
nf_hook_slow+0xbf/0x1f0 net/netfilter/core.c:511
nf_hook include/linux/netfilter.h:244 [inline]
NF_HOOK include/linux/netfilter.h:287 [inline]
br_handle_frame+0x95b/0x1450 net/bridge/br_input.c:305
__netif_receive_skb_core+0xa96/0x3040 net/core/dev.c:4902
__netif_receive_skb_one_core+0xa8/0x1a0 net/core/dev.c:4971
__netif_receive_skb+0x2c/0x1c0 net/core/dev.c:5083
process_backlog+0x206/0x750 net/core/dev.c:5923
napi_poll net/core/dev.c:6346 [inline]
net_rx_action+0x4fa/0x1070 net/core/dev.c:6412
__do_softirq+0x266/0x95a kernel/softirq.c:293
run_ksoftirqd kernel/softirq.c:655 [inline]
run_ksoftirqd+0x8e/0x110 kernel/softirq.c:647
smpboot_thread_fn+0x6ab/0xa10 kernel/smpboot.c:164
kthread+0x357/0x430 kernel/kthread.c:253
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Allocated by task 21201:
save_stack+0x45/0xd0 mm/kasan/common.c:75
set_track mm/kasan/common.c:87 [inline]
__kasan_kmalloc mm/kasan/common.c:497 [inline]
__kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:470
kasan_kmalloc+0x9/0x10 mm/kasan/common.c:511
__do_kmalloc_node mm/slab.c:3686 [inline]
__kmalloc_node+0x4e/0x70 mm/slab.c:3693
kmalloc_node include/linux/slab.h:588 [inline]
kvmalloc_node+0xbd/0x100 mm/util.c:430
kvmalloc include/linux/mm.h:605 [inline]
kvzalloc include/linux/mm.h:613 [inline]
bucket_table_alloc+0x3f/0x450 lib/rhashtable.c:176
rhashtable_init+0x489/0x8a0 lib/rhashtable.c:1069
ila_xlat_init_net+0x1df/0x2f0 net/ipv6/ila/ila_xlat.c:614
ila_init_net+0x16/0x20 net/ipv6/ila/ila_main.c:63
ops_init+0xb6/0x410 net/core/net_namespace.c:129
setup_net+0x2c5/0x730 net/core/net_namespace.c:314
copy_net_ns+0x1d9/0x340 net/core/net_namespace.c:437
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:2549
__do_sys_unshare kernel/fork.c:2617 [inline]
__se_sys_unshare kernel/fork.c:2615 [inline]
__x64_sys_unshare+0x31/0x40 kernel/fork.c:2615
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Freed by task 7360:
save_stack+0x45/0xd0 mm/kasan/common.c:75
set_track mm/kasan/common.c:87 [inline]
__kasan_slab_free+0x102/0x150 mm/kasan/common.c:459
kasan_slab_free+0xe/0x10 mm/kasan/common.c:467
__cache_free mm/slab.c:3498 [inline]
kfree+0xcf/0x230 mm/slab.c:3821
kvfree+0x61/0x70 mm/util.c:459
bucket_table_free+0x93/0x180 lib/rhashtable.c:108
rhashtable_free_and_destroy+0x155/0x8f0 lib/rhashtable.c:1167
ila_xlat_exit_net+0x1a4/0x360 net/ipv6/ila/ila_xlat.c:623
ila_exit_net+0x16/0x20 net/ipv6/ila/ila_main.c:75
ops_exit_list.isra.0+0xb0/0x160 net/core/net_namespace.c:153
cleanup_net+0x3fb/0x960 net/core/net_namespace.c:551
process_one_work+0x98e/0x1790 kernel/workqueue.c:2269
worker_thread+0x98/0xe40 kernel/workqueue.c:2415
kthread+0x357/0x430 kernel/kthread.c:253
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
The buggy address belongs to the object at ffff888089162b40
which belongs to the cache kmalloc-32k of size 32768
The buggy address is located 12 bytes inside of
32768-byte region [ffff888089162b40, ffff88808916ab40)
The buggy address belongs to the page:
page:ffffea0002245800 count:1 mapcount:0 mapping:ffff88812c3f2380 index:0x0 compound_mapcount: 0
flags: 0x1fffc0000010200(slab|head)
raw: 01fffc0000010200 ffffea0002613408 ffffea000192ac08 ffff88812c3f2380
raw: 0000000000000000 ffff888089162b40 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888089162a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888089162a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888089162b00: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
^
ffff888089162b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888089162c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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