On 14 December 2009 13:05, Jeremy Laidman <jlaid...@rebel-it.com.au> wrote:
Just to follow up on this issue (from some time ago), upgrading to the latest Razor solved one problem. The other problem turned out to be a bug in Sophos SAVI in its handling of PDF files. Sophos put in a fix in the March release. The bug appears to be in allocating memory based on a PDF object's meta-data rather than its actual size, leading to a classic buffer overrun, with the side-effect of leaving the message in the pre-scan postfix queue, as well as leaving a rather large temporary file - and eventually filling up the filesystem. We had 4 different emails triggering the problem in a few months, leading to a denial-of-service on each occasion. Improvements in monitoring (checking the age of AMaViS temp files) mean that we are now able to detect a problem before it starts to affect mail. Thanks very much for your assistance in resolving these problems. I still don't quite understand why AMaViS can't do something about handling a scanner that fails in this way, including not being able to report a problem. Can you explain why? Is it because AMaViS pre-forks its children and the master can no longer detect when they die ungracefully? Is this something that the "nanny" utility can help me detect? Would it perhaps be possible for a child to wrap a fork/exec around its call to the scanner, and if the eval() fails, log the failure, or preferably send an appropriate SMTP response code? Cheers Jeremy ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ AMaViS-user mailing list AMaViS-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/amavis-user AMaViS-FAQ:http://www.amavis.org/amavis-faq.php3 AMaViS-HowTos:http://www.amavis.org/howto/
