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| author | Eric Biggers <ebiggers@google.com> | 2019-01-06 21:46:05 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2019-01-10 14:37:31 +0100 |
| commit | 6db43410179bc40419a9859ebb333f178a49829d (patch) | |
| tree | a54c32b7655a47c8c8a45604b45d65f3990a0a3c /crypto/adiantum.c | |
| parent | crypto: cavium/nitrox - Use after free in process_response_list() (diff) | |
| download | linux-6db43410179bc40419a9859ebb333f178a49829d.tar.xz linux-6db43410179bc40419a9859ebb333f178a49829d.zip | |
crypto: adiantum - initialize crypto_spawn::inst
crypto_grab_*() doesn't set crypto_spawn::inst, so templates must set it
beforehand. Otherwise it will be left NULL, which causes a crash in
certain cases where algorithms are dynamically loaded/unloaded. E.g.
with CONFIG_CRYPTO_CHACHA20_X86_64=m, the following caused a crash:
insmod chacha-x86_64.ko
python -c 'import socket; socket.socket(socket.AF_ALG, 5, 0).bind(("skcipher", "adiantum(xchacha12,aes)"))'
rmmod chacha-x86_64.ko
python -c 'import socket; socket.socket(socket.AF_ALG, 5, 0).bind(("skcipher", "adiantum(xchacha12,aes)"))'
Fixes: 059c2a4d8e16 ("crypto: adiantum - add Adiantum support")
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/adiantum.c')
| -rw-r--r-- | crypto/adiantum.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/crypto/adiantum.c b/crypto/adiantum.c index 6651e713c45d..5564e73266a6 100644 --- a/crypto/adiantum.c +++ b/crypto/adiantum.c @@ -539,6 +539,8 @@ static int adiantum_create(struct crypto_template *tmpl, struct rtattr **tb) ictx = skcipher_instance_ctx(inst); /* Stream cipher, e.g. "xchacha12" */ + crypto_set_skcipher_spawn(&ictx->streamcipher_spawn, + skcipher_crypto_instance(inst)); err = crypto_grab_skcipher(&ictx->streamcipher_spawn, streamcipher_name, 0, crypto_requires_sync(algt->type, algt->mask)); @@ -547,6 +549,8 @@ static int adiantum_create(struct crypto_template *tmpl, struct rtattr **tb) streamcipher_alg = crypto_spawn_skcipher_alg(&ictx->streamcipher_spawn); /* Block cipher, e.g. "aes" */ + crypto_set_spawn(&ictx->blockcipher_spawn, + skcipher_crypto_instance(inst)); err = crypto_grab_spawn(&ictx->blockcipher_spawn, blockcipher_name, CRYPTO_ALG_TYPE_CIPHER, CRYPTO_ALG_TYPE_MASK); if (err) |