Messages in this thread Patch in this message | | | Date | Mon, 30 Oct 2006 18:16:55 -0800 (PST) | From | Era Scarecrow <> | Subject | [PATCH 2.6.18] crypto/api: optional cleanup functionalitiy |
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From: Ryan Cecil <rtcvb32@coffey.com>
Adds the function call cleanup to all crypto/cipher/digest calls. Certain select ciphers require a larger dynamic memory allocation, which isn't cleaned when closed. The cleanup code will be called to clean those up before being released.
Signed-off-by: Ryan Cecil <rtcvb32@coffey.com> --- I made this patch primarily because i was developing a cipher and it would crash the UML/kernel. But when it did memory allocation using tcrypt it sucked all the memory out. This fixes that problem.
diff -ur linux-2.6.18/crypto/api.c linux-2.6.18-modified/crypto/api.c --- linux-2.6.18/crypto/api.c 2006-09-19 23:42:06.000000000 -0400 +++ linux-2.6.18-modified/crypto/api.c 2006-10-08 22:27:37.000000000 -0400 @@ -211,10 +211,26 @@ { struct crypto_alg *alg; int size; + void (*misc_cleanup)(struct crypto_tfm *)=NULL;
if (unlikely(!tfm)) return;
+ switch(crypto_tfm_alg_type(tfm)) + { + case CRYPTO_ALG_TYPE_CIPHER: + misc_cleanup = tfm->__crt_alg->cra_u.cipher.cia_cleanup; + break; + case CRYPTO_ALG_TYPE_DIGEST: + misc_cleanup = tfm->__crt_alg->cra_u.digest.dia_cleanup; + break; + case CRYPTO_ALG_TYPE_COMPRESS: + misc_cleanup = tfm->__crt_alg->cra_u.compress.coa_cleanup; + break; + } + if (misc_cleanup) //only a select few need this. + (*misc_cleanup)(tfm); + alg = tfm->__crt_alg; size = sizeof(*tfm) + alg->cra_ctxsize;
diff -ur linux-2.6.18/include/linux/crypto.h linux-2.6.18-modified/include/linux/crypto.h --- linux-2.6.18/include/linux/crypto.h 2006-09-19 23:42:06.000000000 -0400 +++ linux-2.6.18-modified/include/linux/crypto.h 2006-10-08 22:17:26.000000000 -0400 @@ -83,6 +83,7 @@ unsigned int keylen, u32 *flags); void (*cia_encrypt)(struct crypto_tfm *tfm, u8 *dst, const u8 *src); void (*cia_decrypt)(struct crypto_tfm *tfm, u8 *dst, const u8 *src); + void (*cia_cleanup)(struct crypto_tfm *tfm);
unsigned int (*cia_encrypt_ecb)(const struct cipher_desc *desc, u8 *dst, const u8 *src, @@ -104,6 +105,8 @@ void (*dia_update)(struct crypto_tfm *tfm, const u8 *data, unsigned int len); void (*dia_final)(struct crypto_tfm *tfm, u8 *out); + void (*dia_cleanup)(struct crypto_tfm *tfm); + int (*dia_setkey)(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen, u32 *flags); }; @@ -113,6 +116,7 @@ unsigned int slen, u8 *dst, unsigned int *dlen); int (*coa_decompress)(struct crypto_tfm *tfm, const u8 *src, unsigned int slen, u8 *dst, unsigned int *dlen); + void (*coa_cleanup)(struct crypto_tfm *tfm); };
#define cra_cipher cra_u.cipher
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