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| author | Eric Biggers <ebiggers@google.com> | 2019-05-22 22:42:29 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-06-25 06:34:49 +0300 |
| commit | 7348616edde5ea7f98c9b58893e953e228c25a4b (patch) | |
| tree | 0450f8b6b798143769770a4449feeb401a12793d /crypto | |
| parent | 62e5facae8997c6dba85c3e2f9474017f6a9fe05 (diff) | |
| download | linux-7348616edde5ea7f98c9b58893e953e228c25a4b.tar.xz | |
crypto: hmac - fix memory leak in hmac_init_tfm()
[ Upstream commit 7829a0c1cb9c80debfb4fdb49b4d90019f2ea1ac ]
When I added the sanity check of 'descsize', I missed that the child
hash tfm needs to be freed if the sanity check fails. Of course this
should never happen, hence the use of WARN_ON(), but it should be fixed.
Fixes: e1354400b25d ("crypto: hash - fix incorrect HASH_MAX_DESCSIZE")
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/hmac.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/crypto/hmac.c b/crypto/hmac.c index 4b8c8ee8f15c..c623778b36ba 100644 --- a/crypto/hmac.c +++ b/crypto/hmac.c @@ -168,8 +168,10 @@ static int hmac_init_tfm(struct crypto_tfm *tfm) parent->descsize = sizeof(struct shash_desc) + crypto_shash_descsize(hash); - if (WARN_ON(parent->descsize > HASH_MAX_DESCSIZE)) + if (WARN_ON(parent->descsize > HASH_MAX_DESCSIZE)) { + crypto_free_shash(hash); return -EINVAL; + } ctx->hash = hash; return 0; |