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Commit 517aa0bc authored by Joe Perches's avatar Joe Perches Committed by David S. Miller
Browse files

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: default avatarJoe Perches <joe@perches.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1769192a

net/sctp/socket.c

+2 −1
Original line number Diff line number Diff line
@@ -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;