diff options
| author | Wei Yongjun | 2008-02-05 23:35:04 +0900 |
|---|---|---|
| committer | Vlad Yasevich | 2008-02-06 21:27:39 -0500 |
| commit | a869981423b96045c49420a6884c72528836cea8 (patch) | |
| tree | f8f97758febdd52e19bc4c27c566a9ba3027e359 | |
| parent | b46ae36de451212d253f31112338517753739191 (diff) | |
[SCTP]: Fix kernel panic while received ASCONF chunk with bad serial number
While recevied ASCONF chunk with serial number less then needed, kernel
will treat this chunk as a retransmitted ASCONF chunk and find cached
ASCONF-ACK chunk used sctp_assoc_lookup_asconf_ack(). But this function
will always return NO-NULL. So response with cached ASCONF-ACKs chunk
will cause kernel panic.
In function sctp_assoc_lookup_asconf_ack(), if the cached ASCONF-ACKs
list asconf_ack_list is empty, or if the serial being requested does not
exists, the function as it currectly stands returns the actuall
list_head asoc->asconf_ack_list, this is not a cache ASCONF-ACK chunk
but a bogus pointer.
Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
| -rw-r--r-- | net/sctp/associola.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/net/sctp/associola.c b/net/sctp/associola.c index 13931a91f667..d29f792e0529 100644 --- a/net/sctp/associola.c +++ b/net/sctp/associola.c @@ -1525,7 +1525,7 @@ struct sctp_chunk *sctp_assoc_lookup_asconf_ack( const struct sctp_association *asoc, __be32 serial) { - struct sctp_chunk *ack = NULL; + struct sctp_chunk *ack; /* Walk through the list of cached ASCONF-ACKs and find the * ack chunk whose serial number matches that of the request. @@ -1533,9 +1533,9 @@ struct sctp_chunk *sctp_assoc_lookup_asconf_ack( list_for_each_entry(ack, &asoc->asconf_ack_list, transmitted_list) { if (ack->subh.addip_hdr->serial == serial) { sctp_chunk_hold(ack); - break; + return ack; } } - return ack; + return NULL; } |