diff options
| author | Mathias Krause <minipli@googlemail.com> | 2016-06-22 20:29:37 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-07-11 09:31:12 -0700 |
| commit | ce1abd2563d07c1042a6e156fdbaa73e1e70b75f (patch) | |
| tree | 65c54bb5b43959e2e6852a87ec87f097b80ccff8 /crypto | |
| parent | 5ae68873134c30bf83159b6d335b2f996c60346b (diff) | |
| download | lwn-ce1abd2563d07c1042a6e156fdbaa73e1e70b75f.tar.gz lwn-ce1abd2563d07c1042a6e156fdbaa73e1e70b75f.zip | |
crypto: user - re-add size check for CRYPTO_MSG_GETALG
commit 055ddaace03580455a7b7dbea8e93d62acee61fc upstream.
Commit 9aa867e46565 ("crypto: user - Add CRYPTO_MSG_DELRNG")
accidentally removed the minimum size check for CRYPTO_MSG_GETALG
netlink messages. This allows userland to send a truncated
CRYPTO_MSG_GETALG message as short as a netlink header only making
crypto_report() operate on uninitialized memory by accessing data
beyond the end of the netlink message.
Fix this be re-adding the minimum required size of CRYPTO_MSG_GETALG
messages to the crypto_msg_min[] array.
Fixes: 9aa867e46565 ("crypto: user - Add CRYPTO_MSG_DELRNG")
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/crypto_user.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/crypto/crypto_user.c b/crypto/crypto_user.c index 43fe85f20d57..7097a3395b25 100644 --- a/crypto/crypto_user.c +++ b/crypto/crypto_user.c @@ -455,6 +455,7 @@ static const int crypto_msg_min[CRYPTO_NR_MSGTYPES] = { [CRYPTO_MSG_NEWALG - CRYPTO_MSG_BASE] = MSGSIZE(crypto_user_alg), [CRYPTO_MSG_DELALG - CRYPTO_MSG_BASE] = MSGSIZE(crypto_user_alg), [CRYPTO_MSG_UPDATEALG - CRYPTO_MSG_BASE] = MSGSIZE(crypto_user_alg), + [CRYPTO_MSG_GETALG - CRYPTO_MSG_BASE] = MSGSIZE(crypto_user_alg), [CRYPTO_MSG_DELRNG - CRYPTO_MSG_BASE] = 0, }; |