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tpm: Use -EPERM as fallback error code in tpm_ret_to_err

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Using -EFAULT as the tpm_ret_to_err() fallback error code causes makes it
incompatible on how trusted keys transmute TPM return codes.

Change the fallback as -EPERM in order to gain compatibility with trusted
keys. In addition, map TPM_RC_HASH to -EINVAL in order to be compatible
with tpm2_seal_trusted() return values.

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@opinsys.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
This commit is contained in:
Jarkko Sakkinen 2025-09-30 16:02:54 +03:00 • committed by Jarkko Sakkinen
parent faf07e611d
commit 7fcf459ac8
1 changed files with 3 additions and 1 deletions
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4
include/linux/tpm.h
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@ -456,8 +456,10 @@ static inline ssize_t tpm_ret_to_err(ssize_t ret)
return 0;
case TPM2_RC_SESSION_MEMORY:
return -ENOMEM;
case TPM2_RC_HASH:
return -EINVAL;
default:
return -EFAULT;
return -EPERM;
}
}