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| author | Horia Geantă <horia.geanta@nxp.com> | 2020-10-28 12:03:20 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2020-11-06 06:31:15 +0300 |
| commit | a2715fbdc6fc387e85211df917a4778761ec693d (patch) | |
| tree | 93ca6495dfc2bf51fca338cb1e53a346f640bb4d /arch/arm/crypto | |
| parent | cc9a99fb89a91b841556ff5aa97f7a9d0e01cbcc (diff) | |
| download | linux-a2715fbdc6fc387e85211df917a4778761ec693d.tar.xz | |
crypto: arm/aes-neonbs - fix usage of cbc(aes) fallback
Loading the module deadlocks since:
-local cbc(aes) implementation needs a fallback and
-crypto API tries to find one but the request_module() resolves back to
the same module
Fix this by changing the module alias for cbc(aes) and
using the NEED_FALLBACK flag when requesting for a fallback algorithm.
Fixes: 00b99ad2bac2 ("crypto: arm/aes-neonbs - Use generic cbc encryption path")
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'arch/arm/crypto')
| -rw-r--r-- | arch/arm/crypto/aes-neonbs-glue.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/arm/crypto/aes-neonbs-glue.c b/arch/arm/crypto/aes-neonbs-glue.c index bda8bf17631e..f70af1d0514b 100644 --- a/arch/arm/crypto/aes-neonbs-glue.c +++ b/arch/arm/crypto/aes-neonbs-glue.c @@ -19,7 +19,7 @@ MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>"); MODULE_LICENSE("GPL v2"); MODULE_ALIAS_CRYPTO("ecb(aes)"); -MODULE_ALIAS_CRYPTO("cbc(aes)"); +MODULE_ALIAS_CRYPTO("cbc(aes)-all"); MODULE_ALIAS_CRYPTO("ctr(aes)"); MODULE_ALIAS_CRYPTO("xts(aes)"); @@ -191,7 +191,8 @@ static int cbc_init(struct crypto_skcipher *tfm) struct aesbs_cbc_ctx *ctx = crypto_skcipher_ctx(tfm); unsigned int reqsize; - ctx->enc_tfm = crypto_alloc_skcipher("cbc(aes)", 0, CRYPTO_ALG_ASYNC); + ctx->enc_tfm = crypto_alloc_skcipher("cbc(aes)", 0, CRYPTO_ALG_ASYNC | + CRYPTO_ALG_NEED_FALLBACK); if (IS_ERR(ctx->enc_tfm)) return PTR_ERR(ctx->enc_tfm); @@ -441,7 +442,8 @@ static struct skcipher_alg aes_algs[] = { { .base.cra_blocksize = AES_BLOCK_SIZE, .base.cra_ctxsize = sizeof(struct aesbs_cbc_ctx), .base.cra_module = THIS_MODULE, - .base.cra_flags = CRYPTO_ALG_INTERNAL, + .base.cra_flags = CRYPTO_ALG_INTERNAL | + CRYPTO_ALG_NEED_FALLBACK, .min_keysize = AES_MIN_KEY_SIZE, .max_keysize = AES_MAX_KEY_SIZE, |