TPM 2.0 module disappears after trying to delete key in VirtualBox

[TByte007]

Debian 12.5 guest under Windows 10 host, VirtualBox 7.0.14

After executing tpm2_evictcontrol -C o -c 0x81000000 (trying to remove a key) the driver returns:

ERROR:tcti:src/tss2-tcti/tcti-device.c:198:tcti_device_receive() Failed to get response size fd 3, got errno 14: Bad address
ERROR:esys:src/tss2-esys/api/Esys_EvictControl.c:334:Esys_EvictControl_Finish() Received a non-TPM Error
ERROR:esys:src/tss2-esys/api/Esys_EvictControl.c:114:Esys_EvictControl() Esys Finish ErrorCode (0x000a000a)
ERROR: Esys_EvictControl(0xA000A) - tcti:IO failure

And after that I have to reboot to get the TPM module to respond to anything again. If I try any other command before rebooting I just get a timeout:
ERROR:tcti:src/tss2-tcti/tcti-device.c:503:Tss2_Tcti_Device_Init() timeout waiting for response from fd 3

I receive few kernel messages with the last one going on every 10 sec:

[   54.861019] tpm tpm0: tpm2_save_context: failed with a TPM error 0x0101
[   54.862081] tpm tpm0: A TPM error (257) occurred flushing context
[   54.863673] tpm tpm0: A TPM error (257) occurred flushing context
[   54.863683] tpm tpm0: tpm2_commit_space: error -14
[   54.865291] tpm tpm0: A TPM error (257) occurred flushing context
[   64.528914] tpm tpm0: A TPM error (257) occurred attempting get random
[   74.758385] tpm tpm0: A TPM error (257) occurred attempting get random
[   85.003438] tpm tpm0: A TPM error (257) occurred attempting get random
[   95.256208] tpm tpm0: A TPM error (257) occurred attempting get random
...

Is this somehow a normal behavior or the virtual TPM module is crashing ?

Thanks.

[khalibro]

hi i have the same problem, did i find where it comes from ?

[TByte007]

hi i have the same problem, did i find where it comes from ?

Not yet.

[AndreasFuchsTPM]

Sounds like a VirtualBox problem, rather than our problem.
There is no command or anything that should allow a userspace program (such as tpm2-tools) to make the TPM disappear...