==================================================================
BUG: KASAN: use-after-free in __read_once_size include/linux/compiler.h:191 [inline]
BUG: KASAN: use-after-free in rhashtable_last_table+0x220/0x250 lib/rhashtable.c:217
Read of size 8 at addr ffff88805a4ecd80 by task kworker/1:4/8126

CPU: 1 PID: 8126 Comm: kworker/1:4 Not tainted 5.0.0-rc2+ #34
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events rht_deferred_worker
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1db/0x2d0 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_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:135
 __read_once_size include/linux/compiler.h:191 [inline]
 rhashtable_last_table+0x220/0x250 lib/rhashtable.c:217
proc: unrecognized mount option "" or missing value
 rht_deferred_worker+0x126/0x1de0 lib/rhashtable.c:410
 process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153
 worker_thread+0x143/0x14a0 kernel/workqueue.c:2296
 kthread+0x357/0x430 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352

Allocated by task 8126:
 save_stack+0x45/0xd0 mm/kasan/common.c:73
 set_track mm/kasan/common.c:85 [inline]
 __kasan_kmalloc mm/kasan/common.c:496 [inline]
 __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:469
 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:504
 __do_kmalloc_node mm/slab.c:3673 [inline]
 __kmalloc_node+0x4e/0x70 mm/slab.c:3680
 kmalloc_node include/linux/slab.h:588 [inline]
 kvmalloc_node+0xbd/0x100 mm/util.c:416
 kvmalloc include/linux/mm.h:604 [inline]
 kvzalloc include/linux/mm.h:612 [inline]
 bucket_table_alloc+0x9f/0x540 lib/rhashtable.c:176
 rhashtable_rehash_alloc+0x70/0x100 lib/rhashtable.c:353
 rht_deferred_worker+0x23d/0x1de0 lib/rhashtable.c:413
 process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153
 worker_thread+0x143/0x14a0 kernel/workqueue.c:2296
 kthread+0x357/0x430 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352

Freed by task 26:
 save_stack+0x45/0xd0 mm/kasan/common.c:73
 set_track mm/kasan/common.c:85 [inline]
 __kasan_slab_free+0x102/0x150 mm/kasan/common.c:458
 kasan_slab_free+0xe/0x10 mm/kasan/common.c:466
 __cache_free mm/slab.c:3487 [inline]
 kfree+0xcf/0x230 mm/slab.c:3806
 kvfree+0x61/0x70 mm/util.c:445
 bucket_table_free+0xde/0x260 lib/rhashtable.c:108
 rhashtable_free_and_destroy+0x155/0x8f0 lib/rhashtable.c:1163
 inet_frags_exit_net+0x3d/0x50 net/ipv4/inet_fragment.c:96
 ipv4_frags_exit_net+0x73/0x90 net/ipv4/ip_fragment.c:932
 ops_exit_list.isra.0+0xb0/0x160 net/core/net_namespace.c:153
 cleanup_net+0x51d/0xb10 net/core/net_namespace.c:551
 process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153
 worker_thread+0x143/0x14a0 kernel/workqueue.c:2296
 kthread+0x357/0x430 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352

The buggy address belongs to the object at ffff88805a4ecd40
 which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 64 bytes inside of
 8192-byte region [ffff88805a4ecd40, ffff88805a4eed40)
The buggy address belongs to the page:
page:ffffea0001693b00 count:1 mapcount:0 mapping:ffff88812c3f2080 index:0x0 compound_mapcount: 0
flags: 0x1fffc0000010200(slab|head)
raw: 01fffc0000010200 ffffea00021a1408 ffffea000169c308 ffff88812c3f2080
raw: 0000000000000000 ffff88805a4ecd40 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88805a4ecc80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88805a4ecd00: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
>ffff88805a4ecd80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff88805a4ece00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88805a4ece80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
net_ratelimit: 24 callbacks suppressed
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
proc: unrecognized mount option "" or missing value