<div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr">Hi All,<div><br></div><div>I've had a couple of incidents this week where OpenSIPs crashed during BYE processing, in both cases the SIP logs show BYE arriving from both sides of a call within a couple of milliseconds - these overlap and result in 481's being both sent to our media server and being received from our media server as shown in the image below (UA <> OpenSIPs <> Media server):</div><div><br></div><div><div><img src="cid:ii_ka27vhqw1" alt="image.png" width="329" height="154"><br></div></div><div><br></div><div>It is during the processing of the final 481 that OpenSIPs hits the bug. The error shown in the logs is:</div><div><font face="monospace"><br></font></div><div><font face="monospace">opensips[234594]: CRITICAL:core:fm_free: freeing already freed shm pointer (0x7f56fefaaa18), first free: (null): (null)(0) - aborting!</font><br></div><div><br></div><div>User logs show that the 481 was being processed for an established dialog and executes an onreply route followed by a failure route. The failure route issues t_check_trans and rtpengine_delete (which may have already been removed during BYE processing). Is there likely to be anything that I can do at the script level if this is a race condition?</div><div><br></div><div>This server is using the official CentOS 3.0.1 release, happy to upgrade if there have been any relevant fixes since that version.</div><div><br></div><div>Thanks,</div><div><br></div><div>Callum</div></div></div></div></div>
<br>
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