From: Eric Biggers ebiggers@google.com
The x86 MORUS implementations all fail the improved AEAD tests because they produce the wrong result with some data layouts. Also, when the MAY_SLEEP flag is given, they can sleep in the skcipher_walk_*() functions while preemption is disabled by kernel_fpu_begin().
Fix these bugs.
Fixes: 56e8e57fc3a7 ("crypto: morus - Add common SIMD glue code for MORUS") Cc: stable@vger.kernel.org # v4.18+ Cc: Ondrej Mosnacek omosnace@redhat.com Signed-off-by: Eric Biggers ebiggers@google.com --- arch/x86/crypto/morus1280_glue.c | 40 +++++++++++++------------------- arch/x86/crypto/morus640_glue.c | 39 ++++++++++++------------------- 2 files changed, 31 insertions(+), 48 deletions(-)
diff --git a/arch/x86/crypto/morus1280_glue.c b/arch/x86/crypto/morus1280_glue.c index 0dccdda1eb3a..7e600f8bcdad 100644 --- a/arch/x86/crypto/morus1280_glue.c +++ b/arch/x86/crypto/morus1280_glue.c @@ -85,31 +85,20 @@ static void crypto_morus1280_glue_process_ad(
static void crypto_morus1280_glue_process_crypt(struct morus1280_state *state, struct morus1280_ops ops, - struct aead_request *req) + struct skcipher_walk *walk) { - struct skcipher_walk walk; - u8 *cursor_src, *cursor_dst; - unsigned int chunksize, base; - - ops.skcipher_walk_init(&walk, req, false); - - while (walk.nbytes) { - cursor_src = walk.src.virt.addr; - cursor_dst = walk.dst.virt.addr; - chunksize = walk.nbytes; - - ops.crypt_blocks(state, cursor_src, cursor_dst, chunksize); - - base = chunksize & ~(MORUS1280_BLOCK_SIZE - 1); - cursor_src += base; - cursor_dst += base; - chunksize &= MORUS1280_BLOCK_SIZE - 1; - - if (chunksize > 0) - ops.crypt_tail(state, cursor_src, cursor_dst, - chunksize); + while (walk->nbytes >= MORUS1280_BLOCK_SIZE) { + ops.crypt_blocks(state, walk->src.virt.addr, + walk->dst.virt.addr, + round_down(walk->nbytes, + MORUS1280_BLOCK_SIZE)); + skcipher_walk_done(walk, walk->nbytes % MORUS1280_BLOCK_SIZE); + }
- skcipher_walk_done(&walk, 0); + if (walk->nbytes) { + ops.crypt_tail(state, walk->src.virt.addr, walk->dst.virt.addr, + walk->nbytes); + skcipher_walk_done(walk, 0); } }
@@ -147,12 +136,15 @@ static void crypto_morus1280_glue_crypt(struct aead_request *req, struct crypto_aead *tfm = crypto_aead_reqtfm(req); struct morus1280_ctx *ctx = crypto_aead_ctx(tfm); struct morus1280_state state; + struct skcipher_walk walk; + + ops.skcipher_walk_init(&walk, req, true);
kernel_fpu_begin();
ctx->ops->init(&state, &ctx->key, req->iv); crypto_morus1280_glue_process_ad(&state, ctx->ops, req->src, req->assoclen); - crypto_morus1280_glue_process_crypt(&state, ops, req); + crypto_morus1280_glue_process_crypt(&state, ops, &walk); ctx->ops->final(&state, tag_xor, req->assoclen, cryptlen);
kernel_fpu_end(); diff --git a/arch/x86/crypto/morus640_glue.c b/arch/x86/crypto/morus640_glue.c index 7b58fe4d9bd1..cb3a81732016 100644 --- a/arch/x86/crypto/morus640_glue.c +++ b/arch/x86/crypto/morus640_glue.c @@ -85,31 +85,19 @@ static void crypto_morus640_glue_process_ad(
static void crypto_morus640_glue_process_crypt(struct morus640_state *state, struct morus640_ops ops, - struct aead_request *req) + struct skcipher_walk *walk) { - struct skcipher_walk walk; - u8 *cursor_src, *cursor_dst; - unsigned int chunksize, base; - - ops.skcipher_walk_init(&walk, req, false); - - while (walk.nbytes) { - cursor_src = walk.src.virt.addr; - cursor_dst = walk.dst.virt.addr; - chunksize = walk.nbytes; - - ops.crypt_blocks(state, cursor_src, cursor_dst, chunksize); - - base = chunksize & ~(MORUS640_BLOCK_SIZE - 1); - cursor_src += base; - cursor_dst += base; - chunksize &= MORUS640_BLOCK_SIZE - 1; - - if (chunksize > 0) - ops.crypt_tail(state, cursor_src, cursor_dst, - chunksize); + while (walk->nbytes >= MORUS640_BLOCK_SIZE) { + ops.crypt_blocks(state, walk->src.virt.addr, + walk->dst.virt.addr, + round_down(walk->nbytes, MORUS640_BLOCK_SIZE)); + skcipher_walk_done(walk, walk->nbytes % MORUS640_BLOCK_SIZE); + }
- skcipher_walk_done(&walk, 0); + if (walk->nbytes) { + ops.crypt_tail(state, walk->src.virt.addr, walk->dst.virt.addr, + walk->nbytes); + skcipher_walk_done(walk, 0); } }
@@ -143,12 +131,15 @@ static void crypto_morus640_glue_crypt(struct aead_request *req, struct crypto_aead *tfm = crypto_aead_reqtfm(req); struct morus640_ctx *ctx = crypto_aead_ctx(tfm); struct morus640_state state; + struct skcipher_walk walk; + + ops.skcipher_walk_init(&walk, req, true);
kernel_fpu_begin();
ctx->ops->init(&state, &ctx->key, req->iv); crypto_morus640_glue_process_ad(&state, ctx->ops, req->src, req->assoclen); - crypto_morus640_glue_process_crypt(&state, ops, req); + crypto_morus640_glue_process_crypt(&state, ops, &walk); ctx->ops->final(&state, tag_xor, req->assoclen, cryptlen);
kernel_fpu_end();