diff options
| author | Mathias Krause <minipli@googlemail.com> | 2013-04-07 14:05:39 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-04-25 21:23:48 -0700 |
| commit | 0236d37edc0522f37b83eba35432815cd98789ff (patch) | |
| tree | 7e7f5741ffae918b0c489fd0d7590ccd498463da /crypto | |
| parent | 55aa9556812fe10d71bfe82ff61058a3a03cb0f6 (diff) | |
crypto: algif - suppress sending source address information in recvmsg
commit 72a763d805a48ac8c0bf48fdb510e84c12de51fe upstream.
The current code does not set the msg_namelen member to 0 and therefore
makes net/socket.c leak the local sockaddr_storage variable to userland
-- 128 bytes of kernel stack memory. Fix that.
Signed-off-by: Mathias Krause <minipli@googlemail.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/algif_hash.c | 2 | ||||
| -rw-r--r-- | crypto/algif_skcipher.c | 1 |
2 files changed, 3 insertions, 0 deletions
diff --git a/crypto/algif_hash.c b/crypto/algif_hash.c index 62122a1a2f7a..fed2868e504f 100644 --- a/crypto/algif_hash.c +++ b/crypto/algif_hash.c @@ -159,6 +159,8 @@ static int hash_recvmsg(struct kiocb *unused, struct socket *sock, else if (len < ds) msg->msg_flags |= MSG_TRUNC; + msg->msg_namelen = 0; + lock_sock(sk); if (ctx->more) { ctx->more = 0; diff --git a/crypto/algif_skcipher.c b/crypto/algif_skcipher.c index 6a6dfc062d2a..a1c4f0a55583 100644 --- a/crypto/algif_skcipher.c +++ b/crypto/algif_skcipher.c @@ -432,6 +432,7 @@ static int skcipher_recvmsg(struct kiocb *unused, struct socket *sock, long copied = 0; lock_sock(sk); + msg->msg_namelen = 0; for (iov = msg->msg_iov, iovlen = msg->msg_iovlen; iovlen > 0; iovlen--, iov++) { unsigned long seglen = iov->iov_len; |