```
Servers:
Number of credits: 185 Dialect 0x300
1) Name: a.b.c.d Uses: 1 Capability: 0x300067     Session Status: 1 TCP status: 1 Instance: 1
        Local Users To Server: 1 SecMode: 0x1 Req On Wire: 0 SessionId: 0xc1be04000435
        Shares:
        0) IPC: \\xxx\IPC$ Mounts: 1 DevInfo: 0x0 Attributes: 0x0
        PathComponentMax: 0 Status: 1 type: 0 Serial Number: 0x0
        Share Capabilities: None        Share Flags: 0x30
        tid: 0x1        Maximal Access: 0x11f01ff

        1) \\xxx\yyy Mounts: 1 DevInfo: 0x60020 Attributes: 0xc700ff
        PathComponentMax: 255 Status: 1 type: DISK Serial Number: 0xaaf791c3
        Share Capabilities: DFS, Aligned, Partition Aligned, TRIM-support,      Share Flags: 0x803
        tid: 0x5        Optimal sector size: 0x200      Maximal Access: 0x1200a9

        MIDs:

        Server interfaces: 1
        0)      Speed: 10000000000 bps
                Capabilities: 
                IPv4: e.f.g.h

 Debuginfo:

[  710.383873] kernel BUG at mm/slub.c:307!
[  710.384582] invalid opcode: 0000 [#1] SMP PTI
[  710.385116] CPU: 1 PID: 3089 Comm: umount Not tainted 5.4.0-97-generic #110-Ubuntu
[  710.385775] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 12/12/2018
[  710.386903] RIP: 0010:__slab_free+0x199/0x360
[  710.387470] Code: 00 48 89 c7 fa 66 0f 1f 44 00 00 f0 49 0f ba 2c 24 00 72 79 4d 3b 6c 24 20 74 11 49 0f ba 34 24 00 57 9d 0f 1f 44 00 00 eb 9f <0f> 0b 49 3b 5c 24 28 75 e8 48 8b 44 24 28 49 89 4c 24 28 49 89 44
[  710.389229] RSP: 0018:ffffb94541417ce0 EFLAGS: 00010246
[  710.389809] RAX: ffff90cfb5fab120 RBX: 000000008080007f RCX: ffff90cfb5fab120
[  710.390406] RDX: ffff90cfb5fab120 RSI: ffffec7d84d7eac0 RDI: ffff90cfbb003880
[  710.390993] RBP: ffffb94541417d90 R08: 0000000000000001 R09: ffffffffc08ed620
[  710.391574] R10: ffff90cfb5fab120 R11: 0000000000000001 R12: ffffec7d84d7eac0
[  710.392147] R13: ffff90cfb5fab120 R14: ffff90cfbb003880 R15: 0000000000000000
[  710.392709] FS:  00007f7b219e5840(0000) GS:ffff90cfbba80000(0000) knlGS:0000000000000000
[  710.393274] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  710.393820] CR2: 000055a3da30b9d0 CR3: 000000012658a006 CR4: 00000000007606e0
[  710.394545] PKRU: 55555554
[  710.395093] Call Trace:
[  710.395760]  ? fscache_free_cookie+0x39/0x60 [fscache]
[  710.396480]  ? cifs_cleanup_volume_info_contents+0x30/0x60 [cifs]
[  710.397026]  kfree+0x231/0x250
[  710.397593]  cifs_cleanup_volume_info_contents+0x30/0x60 [cifs]
[  710.398159]  dfs_cache_del_vol+0xec/0x1a0 [cifs]
[  710.398720]  cifs_umount+0x9e/0xd0 [cifs]
[  710.399270]  cifs_kill_sb+0x1f/0x30 [cifs]
[  710.399807]  deactivate_locked_super+0x3b/0x80
[  710.400358]  deactivate_super+0x3e/0x50
[  710.400882]  cleanup_mnt+0x109/0x160
[  710.401403]  __cleanup_mnt+0x12/0x20
[  710.401919]  task_work_run+0x8f/0xb0
[  710.402456]  exit_to_usermode_loop+0x131/0x160
[  710.402956]  do_syscall_64+0x163/0x190
[  710.403448]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  710.403922] RIP: 0033:0x7f7b21c4a2cb
[  710.404380] Code: 8b 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 90 f3 0f 1e fa 31 f6 e9 05 00 00 00 0f 1f 44 00 00 f3 0f 1e fa b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 95 8b 0c 00 f7 d8 64 89 01 48
[  710.405823] RSP: 002b:00007fff6a6cdc28 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[  710.406325] RAX: 0000000000000000 RBX: 00007f7b21d79204 RCX: 00007f7b21c4a2cb
[  710.406811] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000560106a71ae0
[  710.407317] RBP: 0000560106a6a890 R08: 0000000000000000 R09: 00007fff6a6cc9a0
[  710.407790] R10: 00007f7b21d65339 R11: 0000000000000246 R12: 0000560106a71ae0
[  710.408249] R13: 0000000000000000 R14: 0000560106a6a988 R15: 0000560106a6aaa0
[  710.408707] Modules linked in: md4 cmac nls_utf8 cifs libarc4 fscache libdes vmw_vsock_vmci_transport vsock dm_multipath scsi_dh_rdac scsi_dh_emc scsi_dh_alua intel_rapl_msr intel_rapl_common isst_if_mbox_msr isst_if_common nfit rapl vmw_balloon joydev input_leds serio_raw vmw_vmci mac_hid sch_fq_codel msr ip_tables x_tables autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel crypto_simd cryptd glue_helper vmwgfx ttm psmouse drm_kms_helper syscopyarea ahci sysfillrect sysimgblt vmw_pvscsi libahci fb_sys_fops vmxnet3 pata_acpi drm i2c_piix4
[  710.412749] ---[ end trace c3b4f6aeb4b07511 ]---
[  710.413274] RIP: 0010:__slab_free+0x199/0x360
[  710.413781] Code: 00 48 89 c7 fa 66 0f 1f 44 00 00 f0 49 0f ba 2c 24 00 72 79 4d 3b 6c 24 20 74 11 49 0f ba 34 24 00 57 9d 0f 1f 44 00 00 eb 9f <0f> 0b 49 3b 5c 24 28 75 e8 48 8b 44 24 28 49 89 4c 24 28 49 89 44
[  710.415405] RSP: 0018:ffffb94541417ce0 EFLAGS: 00010246
[  710.415948] RAX: ffff90cfb5fab120 RBX: 000000008080007f RCX: ffff90cfb5fab120
[  710.416497] RDX: ffff90cfb5fab120 RSI: ffffec7d84d7eac0 RDI: ffff90cfbb003880
[  710.417042] RBP: ffffb94541417d90 R08: 0000000000000001 R09: ffffffffc08ed620
[  710.417600] R10: ffff90cfb5fab120 R11: 0000000000000001 R12: ffffec7d84d7eac0
[  710.418150] R13: ffff90cfb5fab120 R14: ffff90cfbb003880 R15: 0000000000000000
[  710.418720] FS:  00007f7b219e5840(0000) GS:ffff90cfbba80000(0000) knlGS:0000000000000000
[  710.419284] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  710.419852] CR2: 000055a3da30b9d0 CR3: 000000012658a006 CR4: 00000000007606e0
[  710.420478] PKRU: 55555554
```