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| author | Jarkko Sakkinen <jarkko@kernel.org> | 2024-05-13 21:19:04 +0300 |
|---|---|---|
| committer | Jarkko Sakkinen <jarkko@kernel.org> | 2024-05-21 02:35:10 +0300 |
| commit | 050bf3c793a07f96bd1e2fd62e1447f731ed733b (patch) | |
| tree | 0d4f3a065e62e35213a5e257ec10d1f656a7bb78 | |
| parent | ffcaa2172cc1a85ddb8b783de96d38ca8855e248 (diff) | |
| download | linux-050bf3c793a07f96bd1e2fd62e1447f731ed733b.tar.xz | |
KEYS: trusted: Do not use WARN when encode fails
When asn1_encode_sequence() fails, WARN is not the correct solution.
1. asn1_encode_sequence() is not an internal function (located
in lib/asn1_encode.c).
2. Location is known, which makes the stack trace useless.
3. Results a crash if panic_on_warn is set.
It is also noteworthy that the use of WARN is undocumented, and it
should be avoided unless there is a carefully considered rationale to
use it.
Replace WARN with pr_err, and print the return value instead, which is
only useful piece of information.
Cc: stable@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@kernel.org>
| -rw-r--r-- | security/keys/trusted-keys/trusted_tpm2.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/security/keys/trusted-keys/trusted_tpm2.c b/security/keys/trusted-keys/trusted_tpm2.c index c6882f5d094f..8b7dd73d94c1 100644 --- a/security/keys/trusted-keys/trusted_tpm2.c +++ b/security/keys/trusted-keys/trusted_tpm2.c @@ -84,8 +84,9 @@ static int tpm2_key_encode(struct trusted_key_payload *payload, work1 = payload->blob; work1 = asn1_encode_sequence(work1, work1 + sizeof(payload->blob), scratch, work - scratch); - if (WARN(IS_ERR(work1), "BUG: ASN.1 encoder failed")) { + if (IS_ERR(work1)) { ret = PTR_ERR(work1); + pr_err("BUG: ASN.1 encoder failed with %d\n", ret); goto err; } |