The following reply was made to PR kern/37534; it has been noted by GNATS.

From: Martin Husemann <martin@duskware.de>
To: sfandino@yahoo.com
Cc: gnats-bugs@NetBSD.org
Subject: Re: kern/37534: ktrace firefox -> kernel trap 30: data access expection
Date: Fri, 14 Dec 2007 12:45:55 +0100

 On Thu, Dec 13, 2007 at 03:40:00PM +0000, sfandino@yahoo.com wrote:
 > causes a kernel trap:
 > 
 >   cpu0: data fault: pc=127a2ec addr=483fe000
 >   kernel trap 30: data access exception
 >   Stopped in pid 762.1 (firefox-bin) and netbsd:ktrsaupcall+0x8c: ldx [%i4 + %g0], %o0
 
 Looks like it dies here:
 
 0x10f824c is in ktrsaupcall (../../../../kern/kern_ktrace.c:764).
 759              *  Copy the sa_t's
 760              */
 761             sapp = (struct sa_t **) sas;
 762     
 763             for (i = nevent + nint; i >= 0; i--) {
 764                     if (copyin(*sapp, (char *)ktp + len, sizeof(struct sa_t)) == 0)
 765                             len += sizeof(struct sa_t);
 766                     sapp++;
 767             }
 768     
 
 *sapp is 0x483fe000 and we can not access that address.
 
 Could you do a "bt" at the db> prompt? That should get us the arguments to
 this funcion (which are probably bogus).
 
 Martin