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BUG: KASAN: use-after-free in __lock_acquire+0x303c/0x45e0 kernel/locking/lockdep.c:3365
Read of size 8 at addr ffff88808eada620 by task kworker/u4:3/2237

CPU: 1 PID: 2237 Comm: kworker/u4:3 Not tainted 4.14.111 #1
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+0xaf/0x2b5 mm/kasan/report.c:393
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:430
 __lock_acquire+0x303c/0x45e0 kernel/locking/lockdep.c:3365
 lock_acquire+0x16f/0x430 kernel/locking/lockdep.c:3994
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
 _raw_spin_lock_bh+0x33/0x50 kernel/locking/spinlock.c:176
 spin_lock_bh include/linux/spinlock.h:322 [inline]
 tipc_subscrp_subscribe net/tipc/subscr.c:299 [inline]
 tipc_subscrb_rcv_cb+0x505/0xa80 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 75:
 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 75:
 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 ffff88808eada600
 which belongs to the cache kmalloc-96 of size 96
The buggy address is located 32 bytes inside of
 96-byte region [ffff88808eada600, ffff88808eada660)
The buggy address belongs to the page:
page:ffffea00023ab680 count:1 mapcount:0 mapping:ffff88808eada000 index:0xffff88808eada580
flags: 0x1fffc0000000100(slab)
raw: 01fffc0000000100 ffff88808eada000 ffff88808eada580 000000010000001f
raw: ffffea00024de920 ffffea00025ceea0 ffff8880aa8004c0 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88808eada500: 00 00 00 00 00 00 00 00 05 fc fc fc fc fc fc fc
 ffff88808eada580: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff88808eada600: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
                               ^
 ffff88808eada680: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff88808eada700: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
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