This is a note to let you know that I've just added the patch titled crypto: algif - suppress sending source address information in recvmsg to the 3.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: crypto-algif-suppress-sending-source-address-information.patch and it can be found in the queue-3.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 72a763d805a48ac8c0bf48fdb510e84c12de51fe Mon Sep 17 00:00:00 2001 From: Mathias Krause <minipli@xxxxxxxxxxxxxx> Date: Sun, 7 Apr 2013 14:05:39 +0200 Subject: crypto: algif - suppress sending source address information in recvmsg From: Mathias Krause <minipli@xxxxxxxxxxxxxx> 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@xxxxxxxxxxxxxx> Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- crypto/algif_hash.c | 2 ++ crypto/algif_skcipher.c | 1 + 2 files changed, 3 insertions(+) --- a/crypto/algif_hash.c +++ b/crypto/algif_hash.c @@ -161,6 +161,8 @@ static int hash_recvmsg(struct kiocb *un else if (len < ds) msg->msg_flags |= MSG_TRUNC; + msg->msg_namelen = 0; + lock_sock(sk); if (ctx->more) { ctx->more = 0; --- a/crypto/algif_skcipher.c +++ b/crypto/algif_skcipher.c @@ -432,6 +432,7 @@ static int skcipher_recvmsg(struct kiocb 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; Patches currently in stable-queue which might be from minipli@xxxxxxxxxxxxxx are queue-3.4/crypto-algif-suppress-sending-source-address-information.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html