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authorVlad Yasevich <vladislav.yasevich@hp.com>2009-11-23 15:53:56 -0500
committerVlad Yasevich <vladislav.yasevich@hp.com>2009-11-23 15:53:56 -0500
commit6383cfb3ed3c5c0bea06da0099c219ef4237ecf5 (patch)
treee3bfb43500b664c5a572d0a9456d7e7ec4f7aeab
parentsctp: implement the sender side for SACK-IMMEDIATELY extension (diff)
downloadlinux-dev-6383cfb3ed3c5c0bea06da0099c219ef4237ecf5.tar.xz
linux-dev-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>
-rw-r--r--include/net/sctp/sm.h3
-rw-r--r--net/sctp/sm_make_chunk.c13
-rw-r--r--net/sctp/sm_statefuns.c13
3 files changed, 19 insertions, 10 deletions
diff --git a/include/net/sctp/sm.h b/include/net/sctp/sm.h
index c1dd89365833..851c813adb3a 100644
--- a/include/net/sctp/sm.h
+++ b/include/net/sctp/sm.h
@@ -243,7 +243,8 @@ struct sctp_chunk *sctp_make_op_error(const struct sctp_association *,
const struct sctp_chunk *chunk,
__be16 cause_code,
const void *payload,
- size_t paylen);
+ size_t paylen,
+ size_t reserve_tail);
struct sctp_chunk *sctp_make_asconf_update_ip(struct sctp_association *,
union sctp_addr *,
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));