crypto: ccp - copy IV using skcipher ivsize

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AF_ALG rfc3686-ctr-aes-ccp requests pass an 8-byte IV to the driver.

ccp_aes_complete() restores AES_BLOCK_SIZE bytes into the caller's IV
buffer while RFC3686 skciphers expose an 8-byte IV, so the restore
overruns the provided buffer.

Use crypto_skcipher_ivsize() to copy only the algorithm's IV length.

Fixes: 2b789435d7 ("crypto: ccp - CCP AES crypto API support")
Signed-off-by: Paul Moses <p@1g4.org>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Paul Moses 2026-04-01 03:07:49 -05:00 • committed by Greg Kroah-Hartman

parent 608fa1b21e

commit 798d409a89

1 changed files with 5 additions and 2 deletions

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drivers/crypto/ccp/ccp-crypto-aes.c

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