Re: kern/37933: very frequent crashes after suspend/resume

["Steven M. Bellovin" <smb%cs.columbia.edu@localhost>]

The following reply was made to PR kern/37933; it has been noted by GNATS.

From: "Steven M. Bellovin" <smb%cs.columbia.edu@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: gnats-admin%NetBSD.org@localhost
Subject: Re: kern/37933: very frequent crashes after suspend/resume
Date: Sun, 10 Feb 2008 00:15:15 +0000

 I managed to get a core dump.  I booted single-user, set ddb.onpanic=0,
 zeroed most of main memory via a program that malloced a lot of
 memory with _malloc_options=Z to make the core dump smaller, and did two
 sysctl machdep.sleep_state=3.  On the second resume, it panicked.  The
 resulting dump and kernel file (with symbols) are at 
 
 http://www.machshav.com/~smb/netbsd.9.core.gz
 http://www.machshav.com/~smb/netbsd.9.gz
 
 The traceback in the dump (and for that matter the panic string printed
 at crash time) are different than in the original PR, but I suspect
 that that's more a helpful clue than a hindrance -- the crash is 100%
 reproducible, which suggests that the different backtraces are symptoms
 of the same underlying issue.
 
 This dump, btw, is from 4.99.53, from sources retrieved today.