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[SCTP]: Fix potential NULL pointer dereference in sctp_v4_get_saddr 

It is possible to get to sctp_v4_get_saddr() without a valid
association.  This happens when processing OOTB packets and
the cached route entry is no longer valid.
However, when responding to OOTB packets we already properly
set the source address based on the information in the OOTB
packet.  So, if we we get to sctp_v4_get_saddr() without an
association we can simply return.

Signed-off-by: Vladislav Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vladislav Yasevich 2005-11-11 16:05:55 -08:00 committed by David S. Miller
parent 8eb5591052
commit 23ec47a088
1 changed files with 3 additions and 0 deletions
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3
net/sctp/protocol.c
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@ -530,6 +530,9 @@ static void sctp_v4_get_saddr(struct sctp_association *asoc,
{ {
struct rtable *rt = (struct rtable *)dst; struct rtable *rt = (struct rtable *)dst;
if (!asoc)
return;
if (rt) { if (rt) {
saddr->v4.sin_family = AF_INET; saddr->v4.sin_family = AF_INET;
saddr->v4.sin_port = asoc->base.bind_addr.port; saddr->v4.sin_port = asoc->base.bind_addr.port;