=====================================
WARNING: bad unlock balance detected!
5.7.0-rc3-syzkaller #0 Not tainted
-------------------------------------
syz-executor.3/438 is trying to release lock (
==================================================================
BUG: KASAN: use-after-free in print_unlock_imbalance_bug.cold.55+0x97/0x123 kernel/locking/lockdep.c:4400
Read of size 8 at addr ffff888092cea868 by task syz-executor.3/438

CPU: 1 PID: 438 Comm: syz-executor.3 Not tainted 5.7.0-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+0x12d/0x187 lib/dump_stack.c:118
 print_address_description.constprop.8.cold.10+0x9/0x31d mm/kasan/report.c:382
 __kasan_report.cold.11+0x37/0x4e mm/kasan/report.c:511
 kasan_report+0x38/0x50 mm/kasan/common.c:625
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:146
 print_unlock_imbalance_bug.cold.55+0x97/0x123 kernel/locking/lockdep.c:4400
 __lock_release kernel/locking/lockdep.c:4644 [inline]
 lock_release+0x618/0x960 kernel/locking/lockdep.c:4952
 __mutex_unlock_slowpath+0x86/0x690 kernel/locking/mutex.c:1228
 mutex_unlock+0xd/0x10 kernel/locking/mutex.c:740
 ucma_destroy_id+0x23e/0x400 drivers/infiniband/core/ucma.c:624
 ucma_write+0x203/0x2d0 drivers/infiniband/core/ucma.c:1729
 __vfs_write+0x5e/0x110 fs/read_write.c:495
 vfs_write+0x190/0x530 fs/read_write.c:559
 ksys_write+0x19d/0x220 fs/read_write.c:612
 __do_sys_write fs/read_write.c:624 [inline]
 __se_sys_write fs/read_write.c:621 [inline]
 __x64_sys_write+0x6e/0xb0 fs/read_write.c:621
 do_syscall_64+0xca/0x630 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
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:00007f3a2c4e9c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f3a2c4ea6d4 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 468:
 save_stack+0x21/0x50 mm/kasan/common.c:49
 set_track mm/kasan/common.c:57 [inline]
 __kasan_kmalloc.constprop.17+0xc7/0xd0 mm/kasan/common.c:495
 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:509
 kmem_cache_alloc_trace+0x15b/0x780 mm/slab.c:3551
 kmalloc include/linux/slab.h:555 [inline]
 ucma_open+0x4d/0x250 drivers/infiniband/core/ucma.c:1761
 misc_open+0x31b/0x4d0 drivers/char/misc.c:141
 chrdev_open+0x1ed/0x5c0 fs/char_dev.c:414
 do_dentry_open+0x40f/0x1140 fs/open.c:797
 vfs_open+0x9a/0xc0 fs/open.c:911
 do_open fs/namei.c:3229 [inline]
 path_openat+0xdf7/0x2560 fs/namei.c:3346
 do_filp_open+0x171/0x240 fs/namei.c:3373
 do_sys_openat2+0x309/0x590 fs/open.c:1148
 do_sys_open+0x90/0xe0 fs/open.c:1164
 __do_sys_openat fs/open.c:1178 [inline]
 __se_sys_openat fs/open.c:1173 [inline]
 __x64_sys_openat+0x98/0xf0 fs/open.c:1173
 do_syscall_64+0xca/0x630 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3

Freed by task 434:
 save_stack+0x21/0x50 mm/kasan/common.c:49
 set_track mm/kasan/common.c:57 [inline]
 kasan_set_free_info mm/kasan/common.c:317 [inline]
 __kasan_slab_free+0x102/0x150 mm/kasan/common.c:456
 kasan_slab_free+0xe/0x10 mm/kasan/common.c:465
 __cache_free mm/slab.c:3426 [inline]
 kfree+0x108/0x2c0 mm/slab.c:3757
 ucma_close+0x234/0x2d0 drivers/infiniband/core/ucma.c:1817
 __fput+0x2a7/0x790 fs/file_table.c:280
 ____fput+0x9/0x10 fs/file_table.c:313
 task_work_run+0xcc/0x160 kernel/task_work.c:123
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x24e/0x2e0 arch/x86/entry/common.c:165
 prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:279 [inline]
 do_syscall_64+0x531/0x630 arch/x86/entry/common.c:305
 entry_SYSCALL_64_after_hwframe+0x49/0xb3

The buggy address belongs to the object at ffff888092cea800
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 104 bytes inside of
 512-byte region [ffff888092cea800, ffff888092ceaa00)
The buggy address belongs to the page:
page:ffffea00024b3a80 refcount:1 mapcount:0 mapping:000000009b0c2be4 index:0x0
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea0002a313c8 ffffea00023abb88 ffff8880aa400a80
raw: 0000000000000000 ffff888092cea000 0000000100000004 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888092cea700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888092cea780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888092cea800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                          ^
 ffff888092cea880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888092cea900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================