* [PATCH] tipc: validate length of sockaddr in connect() for dgram/rdm
@ 2015-03-23 19:30 Sasha Levin
2015-03-24 9:11 ` Ying Xue
2015-03-24 16:57 ` David Miller
0 siblings, 2 replies; 3+ messages in thread
From: Sasha Levin @ 2015-03-23 19:30 UTC (permalink / raw)
To: linux-kernel
Cc: erik.hugne, ying.xue, jon.maloy, davem, Sasha Levin,
Allan Stephens, open list:TIPC NETWORK LAYER,
open list:TIPC NETWORK LAYER
Commit f2f8036 ("tipc: add support for connect() on dgram/rdm sockets")
hasn't validated user input length for the sockaddr structure which allows
a user to overwrite kernel memory with arbitrary input.
Fixes: f2f8036 ("tipc: add support for connect() on dgram/rdm sockets")
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
---
net/tipc/socket.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 73c2f51..986dc96 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -1852,6 +1852,8 @@ static int tipc_connect(struct socket *sock, struct sockaddr *dest,
if (dst->family == AF_UNSPEC) {
memset(&tsk->remote, 0, sizeof(struct sockaddr_tipc));
tsk->connected = 0;
+ } else if (destlen != sizeof(struct sockaddr_tipc)) {
+ res = -EINVAL;
} else {
memcpy(&tsk->remote, dest, destlen);
tsk->connected = 1;
--
1.7.10.4
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] tipc: validate length of sockaddr in connect() for dgram/rdm
2015-03-23 19:30 [PATCH] tipc: validate length of sockaddr in connect() for dgram/rdm Sasha Levin
@ 2015-03-24 9:11 ` Ying Xue
2015-03-24 16:57 ` David Miller
1 sibling, 0 replies; 3+ messages in thread
From: Ying Xue @ 2015-03-24 9:11 UTC (permalink / raw)
To: Sasha Levin, linux-kernel
Cc: erik.hugne, jon.maloy, davem, Allan Stephens, TIPC NETWORK LAYER
On 03/24/2015 03:30 AM, Sasha Levin wrote:
> Commit f2f8036 ("tipc: add support for connect() on dgram/rdm sockets")
> hasn't validated user input length for the sockaddr structure which allows
> a user to overwrite kernel memory with arbitrary input.
>
> Fixes: f2f8036 ("tipc: add support for connect() on dgram/rdm sockets")
> Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
> ---
> net/tipc/socket.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/net/tipc/socket.c b/net/tipc/socket.c
> index 73c2f51..986dc96 100644
> --- a/net/tipc/socket.c
> +++ b/net/tipc/socket.c
> @@ -1852,6 +1852,8 @@ static int tipc_connect(struct socket *sock, struct sockaddr *dest,
> if (dst->family == AF_UNSPEC) {
> memset(&tsk->remote, 0, sizeof(struct sockaddr_tipc));
> tsk->connected = 0;
> + } else if (destlen != sizeof(struct sockaddr_tipc)) {
> + res = -EINVAL;
> } else {
> memcpy(&tsk->remote, dest, destlen);
> tsk->connected = 1;
>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] tipc: validate length of sockaddr in connect() for dgram/rdm
2015-03-23 19:30 [PATCH] tipc: validate length of sockaddr in connect() for dgram/rdm Sasha Levin
2015-03-24 9:11 ` Ying Xue
@ 2015-03-24 16:57 ` David Miller
1 sibling, 0 replies; 3+ messages in thread
From: David Miller @ 2015-03-24 16:57 UTC (permalink / raw)
To: sasha.levin
Cc: linux-kernel, erik.hugne, ying.xue, jon.maloy, allan.stephens,
netdev, tipc-discussion
From: Sasha Levin <sasha.levin@oracle.com>
Date: Mon, 23 Mar 2015 15:30:00 -0400
> Commit f2f8036 ("tipc: add support for connect() on dgram/rdm sockets")
> hasn't validated user input length for the sockaddr structure which allows
> a user to overwrite kernel memory with arbitrary input.
>
> Fixes: f2f8036 ("tipc: add support for connect() on dgram/rdm sockets")
> Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Applied, thanks.
^ permalink raw reply [flat|nested] 3+ messages in thread
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