ntfs: (device loop1): ntfs_fill_super(): Unable to determine device size.
==================================================================
BUG: KASAN: use-after-free in __lock_acquire+0x3556/0x4a30 kernel/locking/lockdep.c:3215
Read of size 8 at addr ffff88805685c4d0 by task kworker/u4:0/7

CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 4.20.0+ #5
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: ib_addr process_one_req
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
 __lock_acquire+0x3556/0x4a30 kernel/locking/lockdep.c:3215
 lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3841
 __mutex_lock_common kernel/locking/mutex.c:925 [inline]
 __mutex_lock+0x12f/0x1670 kernel/locking/mutex.c:1072
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
 addr_handler+0xf9/0x440 drivers/infiniband/core/cma.c:2967
 process_one_req+0x190/0x940 drivers/infiniband/core/addr.c:643
 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 9776:
 save_stack+0x45/0xd0 mm/kasan/common.c:73
 set_track mm/kasan/common.c:85 [inline]
 kasan_kmalloc mm/kasan/common.c:482 [inline]
 kasan_kmalloc+0xcf/0xe0 mm/kasan/common.c:455
 kmem_cache_alloc_trace+0x151/0x760 mm/slab.c:3607
 kmalloc include/linux/slab.h:545 [inline]
 kzalloc include/linux/slab.h:740 [inline]
 __rdma_create_id+0xce/0x630 drivers/infiniband/core/cma.c:876
 ucma_create_id+0x30f/0x910 drivers/infiniband/core/ucma.c:506
 ucma_write+0x36b/0x480 drivers/infiniband/core/ucma.c:1689
 __vfs_write+0x116/0xb40 fs/read_write.c:485
 vfs_write+0x20c/0x580 fs/read_write.c:549
 ksys_write+0x105/0x260 fs/read_write.c:598
 __do_sys_write fs/read_write.c:610 [inline]
 __se_sys_write fs/read_write.c:607 [inline]
 __x64_sys_write+0x73/0xb0 fs/read_write.c:607
 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 9775:
 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:444
 kasan_slab_free+0xe/0x10 mm/kasan/common.c:452
 __cache_free mm/slab.c:3485 [inline]
 kfree+0xcf/0x230 mm/slab.c:3804
 rdma_destroy_id+0x8be/0xd80 drivers/infiniband/core/cma.c:1846
 ucma_close+0x115/0x320 drivers/infiniband/core/ucma.c:1770
 __fput+0x3c5/0xb10 fs/file_table.c:278
 ____fput+0x16/0x20 fs/file_table.c:309
 task_work_run+0x1f4/0x2b0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x32a/0x3b0 arch/x86/entry/common.c:166
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x696/0x800 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff88805685c140
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 912 bytes inside of
 2048-byte region [ffff88805685c140, ffff88805685c940)
The buggy address belongs to the page:
page:ffffea00015a1700 count:1 mapcount:0 mapping:ffff88812c3f0c40 index:0x0 compound_mapcount: 0
flags: 0x1fffc0000010200(slab|head)
raw: 01fffc0000010200 ffffea00028e8608 ffffea000154ed88 ffff88812c3f0c40
raw: 0000000000000000 ffff88805685c140 0000000100000003 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88805685c380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88805685c400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88805685c480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                 ^
 ffff88805685c500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88805685c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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