Merged revisions 179219 via svnmerge from

https://origsvn.digium.com/svn/asterisk/trunk

........
  r179219 | mmichelson | 2009-03-01 15:45:08 -0600 (Sun, 01 Mar 2009) | 18 lines
  
  Properly free memory and remove scheduler entries when a transmission failure occurs.
  
  Previously, only the "data" field of the sip_pkt created during __sip_reliable_xmit 
  was freed when XMIT_FAILURE was returned by __sip_xmit. When retrans_pkt was called,
  this inevitably resulted in the reading and writing of freed memory.
  
  XMIT_FAILURE is a condition meaning that we don't want to attempt resending the packet
  at all. The proper action to take is to remove the scheduler entry we just created,
  free the packet's data as well as the packet itself, and unlink it from the list of
  packets on the sip_pvt structure.
  
  (closes issue #14455)
  Reported by: Nick_Lewis
  Patches:
        14455.patch uploaded by mmichelson (license 60)
  Tested by: Nick_Lewis
........


git-svn-id: http://svn.digium.com/svn/asterisk/branches/1.6.0@179220 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 5 insertions, 0 deletions

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 403fa0114..8c7be2b37 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -2919,6 +2919,11 @@ static enum sip_result __sip_reliable_xmit(struct sip_pvt *p, int seqno, int res
 
 	if (xmitres == XMIT_ERROR) {	/* Serious network trouble, no need to try again */
 		append_history(pkt->owner, "XmitErr", "%s", pkt->is_fatal ? "(Critical)" : "(Non-critical)");
+		ast_log(LOG_ERROR, "Serious Network Trouble; __sip_xmit returns error for pkt data\n");
+		AST_SCHED_DEL(sched, pkt->retransid);
+		p->packets = pkt->next;
+		ast_free(pkt->data);
+		ast_free(pkt);
 		return AST_FAILURE;
 	} else {
 		return AST_SUCCESS;