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authorVlad Yasevich <vladislav.yasevich@hp.com>2009-11-23 23:53:56 +0300
committerVlad Yasevich <vladislav.yasevich@hp.com>2009-11-23 23:53:56 +0300
commit6383cfb3ed3c5c0bea06da0099c219ef4237ecf5 (patch)
treee3bfb43500b664c5a572d0a9456d7e7ec4f7aeab /net/sctp/sm_make_chunk.c
parentb93d6471748de2ce02cc24774b774deb306a57a8 (diff)
downloadlinux-6383cfb3ed3c5c0bea06da0099c219ef4237ecf5.tar.xz
sctp: Fix malformed "Invalid Stream Identifier" error
The "Invalid Stream Identifier" error has a 16 bit reserved field at the end, thus making the parameter length be 8 bytes. We've never supplied that reserved field making wireshark tag the packet as malformed. Reported-by: Chris Dischino <cdischino@sonusnet.com> Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Diffstat (limited to 'net/sctp/sm_make_chunk.c')
-rw-r--r--net/sctp/sm_make_chunk.c13
1 files changed, 9 insertions, 4 deletions
diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index 9d881a61ac02..9e732916b671 100644
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -987,7 +987,10 @@ static void *sctp_addto_param(struct sctp_chunk *chunk, int len,
target = skb_put(chunk->skb, len);
- memcpy(target, data, len);
+ if (data)
+ memcpy(target, data, len);
+ else
+ memset(target, 0, len);
/* Adjust the chunk length field. */
chunk->chunk_hdr->length = htons(chunklen + len);
@@ -1129,16 +1132,18 @@ nodata:
struct sctp_chunk *sctp_make_op_error(const struct sctp_association *asoc,
const struct sctp_chunk *chunk,
__be16 cause_code, const void *payload,
- size_t paylen)
+ size_t paylen, size_t reserve_tail)
{
struct sctp_chunk *retval;
- retval = sctp_make_op_error_space(asoc, chunk, paylen);
+ retval = sctp_make_op_error_space(asoc, chunk, paylen + reserve_tail);
if (!retval)
goto nodata;
- sctp_init_cause(retval, cause_code, paylen);
+ sctp_init_cause(retval, cause_code, paylen + reserve_tail);
sctp_addto_chunk(retval, paylen, payload);
+ if (reserve_tail)
+ sctp_addto_param(retval, reserve_tail, NULL);
nodata:
return retval;