This is a note to let you know that I've just added the patch titled
iucv: Fix missing msg_namelen update in iucv_sock_recvmsg()
to the 3.0-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:
iucv-fix-missing-msg_namelen-update-in-iucv_sock_recvmsg.patch
and it can be found in the queue-3.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From e76456f9449125c6f3765ff7d6836ae0054c10c2 Mon Sep 17 00:00:00 2001
From: Mathias Krause <[email protected]>
Date: Sun, 7 Apr 2013 01:51:54 +0000
Subject: iucv: Fix missing msg_namelen update in iucv_sock_recvmsg()
From: Mathias Krause <[email protected]>
[ Upstream commit a5598bd9c087dc0efc250a5221e5d0e6f584ee88 ]
The current code does not fill the msg_name member in case it is set.
It also does not set the msg_namelen member to 0 and therefore makes
net/socket.c leak the local, uninitialized sockaddr_storage variable
to userland -- 128 bytes of kernel stack memory.
Fix that by simply setting msg_namelen to 0 as obviously nobody cared
about iucv_sock_recvmsg() not filling the msg_name in case it was set.
Signed-off-by: Mathias Krause <[email protected]>
Cc: Ursula Braun <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/iucv/af_iucv.c | 2 ++
1 file changed, 2 insertions(+)
--- a/net/iucv/af_iucv.c
+++ b/net/iucv/af_iucv.c
@@ -1157,6 +1157,8 @@ static int iucv_sock_recvmsg(struct kioc
struct sk_buff *skb, *rskb, *cskb;
int err = 0;
+ msg->msg_namelen = 0;
+
if ((sk->sk_state == IUCV_DISCONN || sk->sk_state == IUCV_SEVERED) &&
skb_queue_empty(&iucv->backlog_skb_q) &&
skb_queue_empty(&sk->sk_receive_queue) &&
Patches currently in stable-queue which might be from [email protected] are
queue-3.0/irda-fix-missing-msg_namelen-update-in-irda_recvmsg_dgram.patch
queue-3.0/bluetooth-rfcomm-fix-missing-msg_namelen-update-in-rfcomm_sock_recvmsg.patch
queue-3.0/llc-fix-missing-msg_namelen-update-in-llc_ui_recvmsg.patch
queue-3.0/atm-update-msg_namelen-in-vcc_recvmsg.patch
queue-3.0/iucv-fix-missing-msg_namelen-update-in-iucv_sock_recvmsg.patch
queue-3.0/ax25-fix-info-leak-via-msg_name-in-ax25_recvmsg.patch
queue-3.0/tipc-fix-info-leaks-via-msg_name-in-recv_msg-recv_stream.patch
queue-3.0/netrom-fix-info-leak-via-msg_name-in-nr_recvmsg.patch
queue-3.0/caif-fix-missing-msg_namelen-update-in-caif_seqpkt_recvmsg.patch
queue-3.0/bluetooth-fix-possible-info-leak-in-bt_sock_recvmsg.patch
queue-3.0/rose-fix-info-leak-via-msg_name-in-rose_recvmsg.patch
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