sctp: sctp_sendmsg: Don't initialize default_sinfo

This variable only needs initialization when cmsgs.info
is NULL.

Use memset to ensure padding is also zeroed so
kernel doesn't leak any data.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 33d9ee629b4e..d4b8db177e27 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -1496,7 +1496,7 @@ SCTP_STATIC int sctp_sendmsg(struct kiocb *iocb, struct sock *sk,
         struct sctp_chunk *chunk;
         union sctp_addr to;
         struct sockaddr *msg_name = NULL;
-        struct sctp_sndrcvinfo default_sinfo = { 0 };
+        struct sctp_sndrcvinfo default_sinfo;
         struct sctp_sndrcvinfo *sinfo;
         struct sctp_initmsg *sinit;
         sctp_assoc_t associd = 0;
@@ -1760,6 +1760,7 @@ SCTP_STATIC int sctp_sendmsg(struct kiocb *iocb, struct sock *sk,
                 /* If the user didn't specify SNDRCVINFO, make up one with
                  * some defaults.
                  */
+                memset(&default_sinfo, 0, sizeof(default_sinfo));
                 default_sinfo.sinfo_stream = asoc->default_stream;
                 default_sinfo.sinfo_flags = asoc->default_flags;
                 default_sinfo.sinfo_ppid = asoc->default_ppid;