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BUG: KASAN: use-after-free in __lock_acquire+0x2cb4/0x3ff0 kernel/locking/lockdep.c:3295
Read of size 8 at addr ffff888094514b60 by task kworker/0:1/14

CPU: 0 PID: 14 Comm: kworker/0:1 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events sco_sock_timeout
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354
 kasan_report mm/kasan/report.c:412 [inline]
 __asan_report_load8_noabort+0x88/0x90 mm/kasan/report.c:433
 __lock_acquire+0x2cb4/0x3ff0 kernel/locking/lockdep.c:3295
 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144
 spin_lock include/linux/spinlock.h:329 [inline]
 sco_sock_timeout+0x7b/0x1b0 net/bluetooth/sco.c:95
 process_one_work+0x864/0x1570 kernel/workqueue.c:2153
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415

Allocated by task 10832:
 kmem_cache_alloc_trace+0x12f/0x380 mm/slab.c:3625
 kmalloc include/linux/slab.h:515 [inline]
 kzalloc include/linux/slab.h:709 [inline]
 __rdma_create_id+0x5b/0x630 drivers/infiniband/core/cma.c:784
 rds_ib_laddr_check+0xf0/0x480 net/rds/ib.c:411
 rds_trans_get_preferred+0x148/0x290 net/rds/transport.c:98
 rds_bind+0x166c/0x2390 net/rds/bind.c:254
 __sys_bind+0x1e9/0x250 net/socket.c:1594
 __do_sys_bind net/socket.c:1605 [inline]
 __se_sys_bind net/socket.c:1603 [inline]
 __x64_sys_bind+0x6f/0xb0 net/socket.c:1603
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 10832:
 __cache_free mm/slab.c:3503 [inline]
 kfree+0xcc/0x210 mm/slab.c:3822
 rds_ib_laddr_check+0x236/0x480 net/rds/ib.c:476
 rds_trans_get_preferred+0x148/0x290 net/rds/transport.c:98
 rds_bind+0x166c/0x2390 net/rds/bind.c:254
 __sys_bind+0x1e9/0x250 net/socket.c:1594
 __do_sys_bind net/socket.c:1605 [inline]
 __se_sys_bind net/socket.c:1603 [inline]
 __x64_sys_bind+0x6f/0xb0 net/socket.c:1603
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff888094514ac0
 which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 160 bytes inside of
 2048-byte region [ffff888094514ac0, ffff8880945152c0)
The buggy address belongs to the page:
page:ffffea0002514500 count:1 mapcount:0 mapping:ffff88813bff0c40 index:0x0 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffffea0002a24688 ffffea000240c288 ffff88813bff0c40
raw: 0000000000000000 ffff888094514240 0000000100000003 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888094514a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888094514a80: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
>ffff888094514b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                       ^
 ffff888094514b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888094514c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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