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Commit 2a6af25b authored by Stephan Mueller's avatar Stephan Mueller Committed by Herbert Xu
Browse files

crypto: algif - zeroize message digest buffer 



Zeroize the buffer holding the message digest calculated for the
consumer before the buffer is released by the hash AF_ALG interface
handler.

Signed-off-by: default avatarStephan Mueller <smueller@chronox.de>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 4c7912e9

crypto/algif_hash.c

+2 −0
Original line number Diff line number Diff line
@@ -258,6 +258,8 @@ static void hash_sock_destruct(struct sock *sk) 
	struct alg_sock *ask = alg_sk(sk);

	struct hash_ctx *ctx = ask->private;



	memzero_explicit(ctx->result,

		     crypto_ahash_digestsize(crypto_ahash_reqtfm(&ctx->req)));

	sock_kfree_s(sk, ctx->result,

		     crypto_ahash_digestsize(crypto_ahash_reqtfm(&ctx->req)));

	sock_kfree_s(sk, ctx, ctx->len);