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| author | Vlad Yasevich <vladislav.yasevich@hp.com> | 2009-11-23 21:53:56 +0100 |
|---|---|---|
| committer | Vlad Yasevich <vladislav.yasevich@hp.com> | 2009-11-23 21:53:56 +0100 |
| commit | 6383cfb3ed3c5c0bea06da0099c219ef4237ecf5 (patch) | |
| tree | e3bfb43500b664c5a572d0a9456d7e7ec4f7aeab /net | |
| parent | sctp: implement the sender side for SACK-IMMEDIATELY extension (diff) | |
| download | linux-6383cfb3ed3c5c0bea06da0099c219ef4237ecf5.tar.xz linux-6383cfb3ed3c5c0bea06da0099c219ef4237ecf5.zip | |
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')
| -rw-r--r-- | net/sctp/sm_make_chunk.c | 13 | ||||
| -rw-r--r-- | net/sctp/sm_statefuns.c | 13 |
2 files changed, 17 insertions, 9 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; diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c index 8ee24c9dc7e9..16a603527df2 100644 --- a/net/sctp/sm_statefuns.c +++ b/net/sctp/sm_statefuns.c @@ -1720,7 +1720,7 @@ static sctp_disposition_t sctp_sf_do_dupcook_a(const struct sctp_endpoint *ep, err = sctp_make_op_error(asoc, chunk, SCTP_ERROR_COOKIE_IN_SHUTDOWN, - NULL, 0); + NULL, 0, 0); if (err) sctp_add_cmd_sf(commands, SCTP_CMD_REPLY, SCTP_CHUNK(err)); @@ -3977,7 +3977,7 @@ sctp_disposition_t sctp_sf_eat_auth(const struct sctp_endpoint *ep, err_chunk = sctp_make_op_error(asoc, chunk, SCTP_ERROR_UNSUP_HMAC, &auth_hdr->hmac_id, - sizeof(__u16)); + sizeof(__u16), 0); if (err_chunk) { sctp_add_cmd_sf(commands, SCTP_CMD_REPLY, SCTP_CHUNK(err_chunk)); @@ -4069,7 +4069,8 @@ sctp_disposition_t sctp_sf_unk_chunk(const struct sctp_endpoint *ep, hdr = unk_chunk->chunk_hdr; err_chunk = sctp_make_op_error(asoc, unk_chunk, SCTP_ERROR_UNKNOWN_CHUNK, hdr, - WORD_ROUND(ntohs(hdr->length))); + WORD_ROUND(ntohs(hdr->length)), + 0); if (err_chunk) { sctp_add_cmd_sf(commands, SCTP_CMD_REPLY, SCTP_CHUNK(err_chunk)); @@ -4088,7 +4089,8 @@ sctp_disposition_t sctp_sf_unk_chunk(const struct sctp_endpoint *ep, hdr = unk_chunk->chunk_hdr; err_chunk = sctp_make_op_error(asoc, unk_chunk, SCTP_ERROR_UNKNOWN_CHUNK, hdr, - WORD_ROUND(ntohs(hdr->length))); + WORD_ROUND(ntohs(hdr->length)), + 0); if (err_chunk) { sctp_add_cmd_sf(commands, SCTP_CMD_REPLY, SCTP_CHUNK(err_chunk)); @@ -6052,7 +6054,8 @@ static int sctp_eat_data(const struct sctp_association *asoc, err = sctp_make_op_error(asoc, chunk, SCTP_ERROR_INV_STRM, &data_hdr->stream, - sizeof(data_hdr->stream)); + sizeof(data_hdr->stream), + sizeof(u16)); if (err) sctp_add_cmd_sf(commands, SCTP_CMD_REPLY, SCTP_CHUNK(err)); |