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- Log -----------------------------------------------------------------
commit ce3caa50bca9ae837f50ab7a5f7602b9a1a1401f
Author: Christine Caulfield <ccaulfie@redhat.com>
Date: Wed Mar 19 11:37:58 2008 +0000

[CMAN] valid port number & don't use it before validation

cman_send_data didn't validate the port number. This was
not a great problem, but it was slightly silly.

cman_start_recv_data used the port number before validation
in a debug message, this could crash the server if debug
is enabled and a very large port number was passed in.

Signed-off-by: Christine Caulfield <ccaulfie@redhat.com>

-----------------------------------------------------------------------

Summary of changes:
cman/daemon/commands.c | 2 +-
cman/daemon/daemon.c | 6 ++++++
2 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/cman/daemon/commands.c b/cman/daemon/commands.c
index 4696047..b6d796a 100644
--- a/cman/daemon/commands.c
+++ b/cman/daemon/commands.c
@@ -809,7 +809,7 @@ static int do_cmd_bind(struct connection *con, char *cmdbuf)

memcpy(&port, cmdbuf, sizeof(int));

- P_MEMB("requested bind to port %d, port_con = %p (us=%p)
", port, port_array[port], con);
+ P_MEMB("requested bind to port %d, (us=%p)
", port, con);

if (port == 0 || port > 255)
return -EINVAL;
diff --git a/cman/daemon/daemon.c b/cman/daemon/daemon.c
index 1e51a38..eded81e 100644
--- a/cman/daemon/daemon.c
+++ b/cman/daemon/daemon.c
@@ -271,10 +271,16 @@ static int process_client(poll_handle handle, int fd, int revent, void *data)

buf += sizeof(struct sock_data_header);

+ if (dmsg->port > 255) {
+ send_status_return(con, msg->command, -EINVAL);
+ return 0;
+ }
+
if (dmsg->port)
port = dmsg->port;
else
port = con->port;
+
ret = comms_send_message(buf, msg->length - sizeof(struct sock_data_header),
port, con->port,
dmsg->nodeid,


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