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BUG: KASAN: use-after-free in __lock_acquire+0x2c57/0x3f20 kernel/locking/lockdep.c:3369
Read of size 8 at addr ffff88809e916320 by task kworker/u4:0/5

CPU: 0 PID: 5 Comm: kworker/u4:0 Not tainted 4.14.307-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Workqueue: tipc_rcv tipc_recv_work
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:251
 kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:350
 kasan_report mm/kasan/report.c:408 [inline]
 __asan_report_load8_noabort+0x68/0x70 mm/kasan/report.c:429
 __lock_acquire+0x2c57/0x3f20 kernel/locking/lockdep.c:3369
 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
 _raw_spin_lock_bh+0x2f/0x40 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+0x4d4/0xa40 net/tipc/subscr.c:338
 tipc_receive_from_sock+0x25c/0x450 net/tipc/server.c:273
 tipc_recv_work+0x75/0xd0 net/tipc/server.c:547
 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117
 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406

Allocated by task 2818:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551
 kmem_cache_alloc_trace+0x131/0x3d0 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+0x40/0x150 net/tipc/subscr.c:344
 tipc_accept_from_sock+0x25b/0x400 net/tipc/server.c:313
 tipc_recv_work+0x75/0xd0 net/tipc/server.c:547
 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117
 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406

Freed by task 12486:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524
 __cache_free mm/slab.c:3496 [inline]
 kfree+0xc9/0x250 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+0x22/0x30 net/tipc/subscr.c:160
 tipc_subscrp_kref_release net/tipc/subscr.c:178 [inline]
 kref_put include/linux/kref.h:70 [inline]
 tipc_subscrp_put+0x1dc/0x2a0 net/tipc/subscr.c:183
 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1280
 expire_timers+0x232/0x4d0 kernel/time/timer.c:1319
 __run_timers kernel/time/timer.c:1637 [inline]
 run_timer_softirq+0x1d5/0x5a0 kernel/time/timer.c:1650
 __do_softirq+0x24d/0x9ff kernel/softirq.c:288

The buggy address belongs to the object at ffff88809e916300
 which belongs to the cache kmalloc-96 of size 96
The buggy address is located 32 bytes inside of
 96-byte region [ffff88809e916300, ffff88809e916360)
The buggy address belongs to the page:
page:ffffea00027a4580 count:1 mapcount:0 mapping:ffff88809e916000 index:0xffff88809e916980
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffff88809e916000 ffff88809e916980 0000000100000006
raw: ffffea000289d460 ffffea0002d3ff20 ffff88813fe744c0 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88809e916200: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff88809e916280: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff88809e916300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
                               ^
 ffff88809e916380: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff88809e916400: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
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