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crypto: enforce that key material doesn't overlap with LUKS header

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We already check that key material doesn't overlap between key slots,
and that it doesn't overlap with the payload. We didn't check for
overlap with the LUKS header.

Reviewed-by: Richard W.M. Jones <rjones@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Daniel P. Berrangé
2022-05-10 14:35:57 +01:00
parent f1195961f3
commit 93569c3730
1 changed files with 8 additions and 0 deletions
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8
crypto/block-luks.c
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@ -595,6 +595,14 @@ qcrypto_block_luks_check_header(const QCryptoBlockLUKS *luks, Error **errp)
return -1;
}
if (start1 < DIV_ROUND_UP(sizeof(QCryptoBlockLUKSHeader),
QCRYPTO_BLOCK_LUKS_SECTOR_SIZE)) {
error_setg(errp,
"Keyslot %zu is overlapping with the LUKS header",
i);
return -1;
}
if (start1 + len1 > luks->header.payload_offset_sector) {
error_setg(errp,
"Keyslot %zu is overlapping with the encrypted payload",