Re: kern/123741: kernel panic due to netgraph mpd

The following reply was made to PR kern/123741; it has been
noted by GNATS.

From: Alexander Motin <mavFreeBSD.org>
To: bug-followupFreeBSD.org,  mimielliotgmail.com
Cc:  
Subject: Re: kern/123741: [netgraph] [panic] kernel panic
due to netgraph
 mpd
Date: Sat, 17 May 2008 11:15:52 +0300

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 It looks like crash due to unchecked netgraph data items
exhaustion.
 Attached patch should fix this crash, but problem may
remain in some
 other symptoms. It would be good to investigate the reason
of this
 exhaustion. It could be or just high netgraph load or some
resource leak.
 
 -- 
 Alexander Motin
 
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  name="ng_socket.c.enomem.patch"
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  filename="ng_socket.c.enomem.patch"
 
 --- ng_socket.c.prev	2008-03-11 23:58:48.000000000 +0200
 +++ ng_socket.c	2008-05-17 10:36:46.000000000 +0300
  -732,7 +732,8  ng_connect_data(struct sockaddr *nam, st
  
  	sap = (struct sockaddr_ng *) nam;
  	/* The item will hold the node reference. */
 -	item = ng_package_data(NULL, NG_WAITOK);
 +	if ((item = ng_package_data(NULL, NG_WAITOK)) == NULL)
 +		return (ENOMEM);
  
  	if ((error = ng_address_path(NULL, item, 
sap->sg_data, 0)))
  		return (error); /* item is freed on failure */
 
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