==================================================================
BUG: KASAN: use-after-free in __read_once_size include/linux/compiler.h:186 [inline]
BUG: KASAN: use-after-free in atomic_read arch/x86/include/asm/atomic.h:27 [inline]
BUG: KASAN: use-after-free in refcount_inc_not_zero+0xd3/0xe0 lib/refcount.c:120
Read of size 4 at addr ffff88809ff59100 by task kworker/u4:0/27352

CPU: 0 PID: 27352 Comm: kworker/u4:0 Not tainted 4.14.116 #6
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: tipc_rcv tipc_recv_work
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x138/0x19c lib/dump_stack.c:53
 print_address_description.cold+0x7c/0x1dc mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report mm/kasan/report.c:409 [inline]
 kasan_report.cold+0x11e/0x2db mm/kasan/report.c:393
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:429
 __read_once_size include/linux/compiler.h:186 [inline]
 atomic_read arch/x86/include/asm/atomic.h:27 [inline]
 refcount_inc_not_zero+0xd3/0xe0 lib/refcount.c:120
 refcount_inc+0x16/0x40 lib/refcount.c:153
 kref_get include/linux/kref.h:47 [inline]
 tipc_subscrb_get net/tipc/subscr.c:165 [inline]
 tipc_subscrp_subscribe net/tipc/subscr.c:303 [inline]
 tipc_subscrb_rcv_cb+0x61d/0xa80 net/tipc/subscr.c:338
 tipc_receive_from_sock+0x28a/0x4e0 net/tipc/server.c:273
 tipc_recv_work+0x8b/0xf0 net/tipc/server.c:547
 process_one_work+0x868/0x1610 kernel/workqueue.c:2114
 worker_thread+0x5d9/0x1050 kernel/workqueue.c:2248
 kthread+0x31c/0x430 kernel/kthread.c:232
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402

Allocated by task 8555:
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
 save_stack+0x45/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc mm/kasan/kasan.c:551 [inline]
 kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:529
 kmem_cache_alloc_trace+0x152/0x790 mm/slab.c:3618
 kmalloc include/linux/slab.h:488 [inline]
 kzalloc include/linux/slab.h:661 [inline]
 tipc_subscrb_create net/tipc/subscr.c:223 [inline]
 tipc_subscrb_connect_cb+0x46/0x160 net/tipc/subscr.c:344
 tipc_accept_from_sock+0x280/0x470 net/tipc/server.c:313
 tipc_recv_work+0x8b/0xf0 net/tipc/server.c:547
 process_one_work+0x868/0x1610 kernel/workqueue.c:2114
 worker_thread+0x5d9/0x1050 kernel/workqueue.c:2248
 kthread+0x31c/0x430 kernel/kthread.c:232
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402

Freed by task 8568:
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
 save_stack+0x45/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0x75/0xc0 mm/kasan/kasan.c:524
 __cache_free mm/slab.c:3496 [inline]
 kfree+0xcc/0x270 mm/slab.c:3815
 tipc_subscrb_kref_release net/tipc/subscr.c:155 [inline]
 kref_put include/linux/kref.h:70 [inline]
 tipc_subscrb_put+0x27/0x30 net/tipc/subscr.c:160
 tipc_subscrb_delete net/tipc/subscr.c:239 [inline]
 tipc_subscrb_release_cb+0x20/0x30 net/tipc/subscr.c:316
 tipc_close_conn+0x179/0x210 net/tipc/server.c:203
 tipc_send_to_sock net/tipc/server.c:538 [inline]
 tipc_send_work+0x470/0x5a0 net/tipc/server.c:564
 process_one_work+0x868/0x1610 kernel/workqueue.c:2114
 worker_thread+0x5d9/0x1050 kernel/workqueue.c:2248
 kthread+0x31c/0x430 kernel/kthread.c:232
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402

The buggy address belongs to the object at ffff88809ff59100
 which belongs to the cache kmalloc-96 of size 96
The buggy address is located 0 bytes inside of
 96-byte region [ffff88809ff59100, ffff88809ff59160)
The buggy address belongs to the page:
page:ffffea00027fd640 count:1 mapcount:0 mapping:ffff88809ff59000 index:0x0
flags: 0x1fffc0000000100(slab)
raw: 01fffc0000000100 ffff88809ff59000 0000000000000000 0000000100000020
raw: ffffea0002a134a0 ffffea000260c460 ffff8880aa8004c0 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88809ff59000: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
 ffff88809ff59080: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
>ffff88809ff59100: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
                   ^
 ffff88809ff59180: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
 ffff88809ff59200: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
==================================================================