Date: Thu, 19 Mar 1998 08:20:33 +1030 From: Greg Lehey <grog@lemis.com> To: Poul-Henning Kamp <phk@critter.freebsd.dk>, Mike Smith <mike@smith.net.au> Cc: FreeBSD current users <FreeBSD-current@FreeBSD.ORG> Subject: Re: Memory leak in inetd in last week's -current? Message-ID: <19980319082033.12206@freebie.lemis.com> In-Reply-To: <587.890257623@critter.freebsd.dk>; from Poul-Henning Kamp on Wed, Mar 18, 1998 at 10:47:03PM %2B0100 References: <199803182125.NAA23054@dingo.cdrom.com> <587.890257623@critter.freebsd.dk>
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On Wed, 18 March 1998 at 22:47:03 +0100, Poul-Henning Kamp wrote: > In message <199803182125.NAA23054@dingo.cdrom.com>, Mike Smith writes: >>> I've just discovered that my inetd has been rejecting connections with >>> the following message: >>> >>> $ ftp ftp.lemis.com >>> Connected to freebie.lemis.com. >>> inetd in realloc(): warning: junk pointer, too high to make sense. >>> ftp> >>> >>> I took a ktrace of it happening, if that's of any use, and restarted >>> inetd, which made the problem go away. Any ideas? >> >> Bug in inetd, normally associated with malloc failure (system out of >> memory). >> >> Possibly bad use of a low (nonzero) magic pointer value, or possibly >> attempting to use a pointer to a static item as a substitute. > > Wrong. > > It says "too >high< to make sense". > > Likely causes: > > pointer to a stack item > pointer to a previously free'ed piece of memory. > pointer to mmaped memory, for instance shlib data > uninitialized pointer. > > Technically it means that the pointer is higher than sbrk(0). Now *that*'s the kind of information which makes sense to me. OK, that looks like a program logic bug, not the results of loss of swap space (of which I should have always had at least 80 MB over). Any ideas about how to look for this particular needle in a haystack? Greg To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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