[PATCH] KEYS: trusted: Fix overwrite of keyhandle parameter

[Jarkko Sakkinen]

On Mon, Dec 08, 2025 at 04:54:35PM +0200, Jarkko Sakkinen wrote:
> tpm2_key_decode() overrides the explicit keyhandle parameter, which can
> lead to problems, if the loaded parent handle does not match the handle
> stored to the key file. This can easily happen as handle by definition
> is an ambiguous attribute.
> 
> Cc: stable at vger.kernel.org # v5.13+
> Fixes: f2219745250f ("security: keys: trusted: use ASN.1 TPM2 key format for the blobs")
> Signed-off-by: Jarkko Sakkinen <jarkko at kernel.org>

What this means in practice is that sometimes you need either to:

1. Binary patch the key file.
2. Decompose/compose a key file

BR, Jarkko