Date: Tue, 4 Apr 2000 08:27:56 -0500 (CDT) From: Guy Helmer <ghelmer@cs.iastate.edu> To: Sue Blake <sue@welearn.com.au> Cc: Sheldon Hearn <sheldonh@uunet.co.za>, freebsd-questions@FreeBSD.ORG Subject: Re: cron's complaint Message-ID: <Pine.HPX.4.05.10004040816250.28738-100000@popeye.cs.iastate.edu> In-Reply-To: <20000404221334.A3352@welearn.com.au>
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On Tue, 4 Apr 2000, Sue Blake wrote: > On Tue, Apr 04, 2000 at 09:35:35PM +1000, Sue Blake wrote: > > On Tue, Apr 04, 2000 at 12:33:35PM +0200, Sheldon Hearn wrote: > > > On Tue, 04 Apr 2000 18:05:44 +1000, Sue Blake wrote: > > > > > > > CRON in malloc(): warning: pointer to wrong page. > > > > CRON in free(): warning: pointer to wrong page. > > > Meanwhile, I'd really like to know how to get cron working without > > drowning me in hundreds of errors. I've rebooted since it started, and > > the errors are still being churned out. It feels like something's been > > changed permanently. > > I made some cosmetic edits to the active lines in /etc/crontab and cron > stopped reporting those errors from that moment on. Later on, root > dutifully sent me my StarTrek Night reminder email courtesy of cron, > with no complaints. > > Probably all that was significant was that the file was changed and > therefore re-read by cron. Might a corrupted crontab file in var cause this? > Damn, I should have kept a copy. My personal crontab was mucking up > too, but I'll have to wait until tomorrow before its jobs are due again. Hmm, a crontab file that triggers this activity would be a great data point... My working hypothesis has been that the memory corruption problems in cron are due to signals and malloc library re-entrancy (as was the case with inetd(8)). I have changed cron in the same way inetd(8) was changed in rev 1.44. I am interested in having people try the changes to see if they fix these and other related problems. Guy Guy Helmer, Ph.D. Candidate, Iowa State University Dept. of Computer Science Research Assistant, Dept. of Computer Science --- ghelmer@cs.iastate.edu http://www.cs.iastate.edu/~ghelmer To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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