From: Wei Yongjun <[EMAIL PROTECTED]>
If ASCONF chunk is bundled with other chunks as the first chunk, when
process the ASCONF parameters, full packet data will be process as the
parameters of the ASCONF chunk, not only the real parameters. So if you
send a ASCONF chunk bundled with other chunks, you will get an unexpected
result.
This problem also exists when ASCONF-ACK chunk is bundled with other chunks.
This patch fix this problem.
Signed-off-by: Wei Yongjun <[EMAIL PROTECTED]>
Signed-off-by: Vlad Yasevich <[EMAIL PROTECTED]>
---
net/sctp/sm_make_chunk.c | 8 ++++++--
1 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index c377e4e..5de4729 100644
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -2848,10 +2848,11 @@ struct sctp_chunk *sctp_process_asconf(struct
sctp_association *asoc,
__be16 err_code;
int length = 0;
- int chunk_len = asconf->skb->len;
+ int chunk_len;
__u32 serial;
int all_param_pass = 1;
+ chunk_len = ntohs(asconf->chunk_hdr->length) - sizeof(sctp_chunkhdr_t);
hdr = (sctp_addiphdr_t *)asconf->skb->data;
serial = ntohl(hdr->serial);
@@ -2990,7 +2991,7 @@ static __be16 sctp_get_asconf_response(struct sctp_chunk
*asconf_ack,
sctp_addip_param_t *asconf_ack_param;
sctp_errhdr_t *err_param;
int length;
- int asconf_ack_len = asconf_ack->skb->len;
+ int asconf_ack_len;
__be16 err_code;
if (no_err)
@@ -2998,6 +2999,9 @@ static __be16 sctp_get_asconf_response(struct sctp_chunk
*asconf_ack,
else
err_code = SCTP_ERROR_REQ_REFUSED;
+ asconf_ack_len = ntohs(asconf_ack->chunk_hdr->length) -
+ sizeof(sctp_chunkhdr_t);
+
/* Skip the addiphdr from the asconf_ack chunk and store a pointer to
* the first asconf_ack parameter.
*/
--
1.5.2.4
-
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