=====================================
WARNING: bad unlock balance detected!
5.6.0-rc3-syzkaller #0 Not tainted
-------------------------------------
syz-executor.0/10662 is trying to release lock (
==================================================================
BUG: KASAN: use-after-free in print_lockdep_cache kernel/locking/lockdep.c:664 [inline]
BUG: KASAN: use-after-free in print_unlock_imbalance_bug+0x16f/0x240 kernel/locking/lockdep.c:3999
Read of size 8 at addr ffff888097b80478 by task syz-executor.0/10662

CPU: 1 PID: 10662 Comm: syz-executor.0 Not tainted 5.6.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fb/0x318 lib/dump_stack.c:118
 print_address_description+0x74/0x5c0 mm/kasan/report.c:374
 __kasan_report+0x149/0x1c0 mm/kasan/report.c:506
 kasan_report+0x26/0x50 mm/kasan/common.c:641
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:135
 print_lockdep_cache kernel/locking/lockdep.c:664 [inline]
 print_unlock_imbalance_bug+0x16f/0x240 kernel/locking/lockdep.c:3999
 __lock_release kernel/locking/lockdep.c:4241 [inline]
 lock_release+0x469/0x710 kernel/locking/lockdep.c:4502
 __mutex_unlock_slowpath+0x80/0x5b0 kernel/locking/mutex.c:1228
 mutex_unlock+0xd/0x10 kernel/locking/mutex.c:740
 ucma_destroy_id+0x212/0x400 drivers/infiniband/core/ucma.c:621
 ucma_write+0x2da/0x360 drivers/infiniband/core/ucma.c:1684
 __vfs_write+0xb8/0x740 fs/read_write.c:494
 vfs_write+0x270/0x580 fs/read_write.c:558
 ksys_write+0x117/0x220 fs/read_write.c:611
 __do_sys_write fs/read_write.c:623 [inline]
 __se_sys_write fs/read_write.c:620 [inline]
 __x64_sys_write+0x7b/0x90 fs/read_write.c:620
 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c449
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fac5454ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fac5454f6d4 RCX: 000000000045c449
RDX: 0000000000000018 RSI: 0000000020000200 RDI: 0000000000000006
RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000cb7 R14: 00000000004d7b10 R15: 000000000076bf2c

Allocated by task 10666:
 save_stack mm/kasan/common.c:72 [inline]
 set_track mm/kasan/common.c:80 [inline]
 __kasan_kmalloc+0x118/0x1c0 mm/kasan/common.c:515
 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:529
 kmem_cache_alloc_trace+0x221/0x2f0 mm/slab.c:3551
 kmalloc include/linux/slab.h:555 [inline]
 ucma_open+0x57/0x1f0 drivers/infiniband/core/ucma.c:1716
 misc_open+0x3ea/0x440 drivers/char/misc.c:141
 chrdev_open+0x509/0x590 fs/char_dev.c:414
 do_dentry_open+0x85b/0x10c0 fs/open.c:797
 vfs_open+0x73/0x80 fs/open.c:914
 do_last fs/namei.c:3490 [inline]
 path_openat+0x16f1/0x4380 fs/namei.c:3607
 do_filp_open+0x192/0x3d0 fs/namei.c:3637
 do_sys_openat2+0x42b/0x6f0 fs/open.c:1149
 do_sys_open fs/open.c:1165 [inline]
 __do_sys_openat fs/open.c:1179 [inline]
 __se_sys_openat fs/open.c:1174 [inline]
 __x64_sys_openat+0x1e6/0x210 fs/open.c:1174
 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 10661:
 save_stack mm/kasan/common.c:72 [inline]
 set_track mm/kasan/common.c:80 [inline]
 kasan_set_free_info mm/kasan/common.c:337 [inline]
 __kasan_slab_free+0x12e/0x1e0 mm/kasan/common.c:476
 kasan_slab_free+0xe/0x10 mm/kasan/common.c:485
 __cache_free mm/slab.c:3426 [inline]
 kfree+0x10d/0x220 mm/slab.c:3757
 ucma_close+0x2b3/0x2d0 drivers/infiniband/core/ucma.c:1772
 __fput+0x2e4/0x740 fs/file_table.c:280
 ____fput+0x15/0x20 fs/file_table.c:313
 task_work_run+0x176/0x1b0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop arch/x86/entry/common.c:164 [inline]
 prepare_exit_to_usermode+0x480/0x5b0 arch/x86/entry/common.c:195
 syscall_return_slowpath+0x113/0x4a0 arch/x86/entry/common.c:278
 do_syscall_64+0x11f/0x1c0 arch/x86/entry/common.c:304
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff888097b80400
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 120 bytes inside of
 256-byte region [ffff888097b80400, ffff888097b80500)
The buggy address belongs to the page:
page:ffffea00025ee000 refcount:1 mapcount:0 mapping:ffff8880aa4008c0 index:0x0
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea0002606988 ffffea0002699848 ffff8880aa4008c0
raw: 0000000000000000 ffff888097b80000 0000000100000008 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888097b80300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888097b80380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888097b80400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                                ^
 ffff888097b80480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888097b80500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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