[PATCH v3 1/2] keys/trusted_keys: return immediately after TPM unseal failure
From: Srish Srinivasan <ssrish@linux.ibm.com>
Date: 2026-09-10 07:53:28
Also in:
keyrings, linux-security-module, lkml, stable
Subsystem:
keys-trusted, keys/keyrings, security subsystem, the rest · Maintainers:
James Bottomley, Jarkko Sakkinen, Mimi Zohar, David Howells, Paul Moore, James Morris, "Serge E. Hallyn", Linus Torvalds
trusted_tpm_unseal() proceeds to pcrlock() when the TPM unseal operation
fails. If pcrlock() succeeds, its return value overwrites the unseal error,
causing key instantiation to succeed.
Return immediately when unseal fails to preserve the original error.
Fixes: 5d0682be3189 ("KEYS: trusted: Add generic trusted keys framework")
Cc: stable@vger.kernel.org
Signed-off-by: Srish Srinivasan <ssrish@linux.ibm.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
---
security/keys/trusted-keys/trusted_tpm1.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/security/keys/trusted-keys/trusted_tpm1.c b/security/keys/trusted-keys/trusted_tpm1.c
index bf0bf7f36970..9cdfeea800a3 100644
--- a/security/keys/trusted-keys/trusted_tpm1.c
+++ b/security/keys/trusted-keys/trusted_tpm1.c@@ -923,8 +923,10 @@ static int trusted_tpm_unseal(struct trusted_key_payload *p, char *datablob) ret = tpm2_unseal_trusted(chip, p, options); else ret = key_unseal(p, options); - if (ret < 0) + if (ret < 0) { pr_info("key_unseal failed (%d)\n", ret); + goto out; + } if (options->pcrlock) { ret = pcrlock(options->pcrlock);
--
2.53.0