Date: Thu, 5 Mar 2009 09:04:18 -0500 From: Bill Moran <wmoran@potentialtech.com> To: "Ming Tang" <mtang17@comcast.net> Cc: freebsd-questions@freebsd.org Subject: Re: ClamAV execusion died without error messages Message-ID: <20090305090418.fd23b85f.wmoran@potentialtech.com> In-Reply-To: <51E3D55451E04BFC97DDD30607FE1B58@Ming> References: <20090301193633.c9ed3807.wmoran@potentialtech.com> <51E3D55451E04BFC97DDD30607FE1B58@Ming>
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In response to "Ming Tang" <mtang17@comcast.net>: > I did not find any other error messages in log files. The following lines > appeared in the section for "kernel log messages" in daily email message for > Security Run Output. > > > pid 840 (freshclam), uid 1#: exited on signal 11 This is a "segmentation violation". It means the program is trying to access memory that it never allocated (i.e., it's trying to access memory belonging to another process). This generally happens in 1 of 3 cases: 1) The program is a virus, etc trying to steal data from other programs. 2) The program was written poorly and has memory management bugs. 3) Your hardware (RAM) is buggy and memory bits are flipping by accident causing unpredictable memory access. http://en.wikipedia.org/wiki/Segmentation_violation > > pid 875 (clamd), uid 1#: exited on signal 10 This is a more unusual error, but still related to memory: http://en.wikipedia.org/wiki/Bus_error This error is more difficult to create using software than a segfault. My theory at this point is that you either a) downloaded precompiled packages that are not supported by your hardware. b) built these from ports with funky CFLAGS settings My recommendation would be to start out by deinstalling clam, and rebuilding it from ports, ensuring that your /etc/make.conf settings are all set to defaults. If the problem persists, install a program like memtest86, or use some other RAM tester to ensure that your hardware is solid. HTH -- Bill Moran http://www.potentialtech.com http://people.collaborativefusion.com/~wmoran/
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