Herbert Xu 9b2f4cb65f crypto: authenc - Fix crash with zero-length assoc data ...

The authenc code doesn't deal with zero-length associated data
correctly and ends up constructing a zero-length sg entry which
causes a crash when it's fed into the crypto system.

This patch fixes this by avoiding the code-path that triggers
the SG construction if we have no associated data.

This isn't the most optimal fix as it means that we'll end up
using the fallback code-path even when we could still execute
the digest function.  However, this isn't a big deal as nobody
but the test path would supply zero-length associated data.

Reported-by: Romain Francoise <romain@orebokech.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Tested-by: Romain Francoise <romain@orebokech.com>

2012-09-11 12:05:45 +08:00

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async_tx

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ablkcipher.c

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aead.c

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aes_generic.c

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af_alg.c

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ahash.c

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algapi.c

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algboss.c

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algif_hash.c

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algif_skcipher.c

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ansi_cprng.c

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anubis.c

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api.c

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arc4.c

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authenc.c

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authencesn.c

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blkcipher.c

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blowfish_common.c

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blowfish_generic.c

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camellia_generic.c

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cast5.c

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cast6.c

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cbc.c

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ccm.c

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chainiv.c

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cipher.c

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compress.c

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crc32c.c

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cryptd.c

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crypto_null.c

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crypto_user.c

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crypto_wq.c

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ctr.c

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cts.c

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deflate.c

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des_generic.c

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ecb.c

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eseqiv.c

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fcrypt.c

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fips.c

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gcm.c

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gf128mul.c

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ghash-generic.c

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hmac.c

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internal.h

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Kconfig

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khazad.c

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krng.c

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lrw.c

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lzo.c

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Makefile

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md4.c

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md5.c

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michael_mic.c

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pcbc.c

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pcompress.c

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pcrypt.c

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proc.c

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ripemd.h

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rmd128.c

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rmd160.c

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rmd256.c

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rmd320.c

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rng.c

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salsa20_generic.c

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scatterwalk.c

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seed.c

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seqiv.c

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serpent_generic.c

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sha1_generic.c

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sha256_generic.c

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sha512_generic.c

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shash.c

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tcrypt.c

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tcrypt.h

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tea.c

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testmgr.c

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testmgr.h

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tgr192.c

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twofish_common.c

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twofish_generic.c

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vmac.c

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wp512.c

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xcbc.c

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xor.c

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xts.c

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zlib.c

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