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crypto: validate that LUKS payload doesn't overlap with header

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We already validate that LUKS keyslots don't overlap with the
header, or with each other. This closes the remaining hole in
validation of LUKS file regions.

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 2022-09-05 13:50:03 +01:00
parent 93569c3730
commit d233fbc327
1 changed files with 7 additions and 0 deletions
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7
crypto/block-luks.c
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@ -572,6 +572,13 @@ qcrypto_block_luks_check_header(const QCryptoBlockLUKS *luks, Error **errp)
return -1;
}
if (luks->header.payload_offset_sector <
DIV_ROUND_UP(QCRYPTO_BLOCK_LUKS_KEY_SLOT_OFFSET,
QCRYPTO_BLOCK_LUKS_SECTOR_SIZE)) {
error_setg(errp, "LUKS payload is overlapping with the header");
return -1;
}
/* Check all keyslots for corruption */
for (i = 0 ; i < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS ; i++) {