Re: kern/53261: kernel crash during test run

[Robert Elz <kre%munnari.OZ.AU@localhost>]

The following reply was made to PR kern/53261; it has been noted by GNATS.

From: Robert Elz <kre%munnari.OZ.AU@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: kern/53261: kernel crash during test run
Date: Thu, 24 May 2018 03:57:51 +0700

     Date:        Wed, 23 May 2018 12:15:01 +0000 (UTC)
     From:        Martin Husemann <martin%duskware.de@localhost>
     Message-ID:  <20180523121501.5D1887A21F%mollari.NetBSD.org@localhost>
 
   |  An alternative is to make the syscall handling code in arm a lot more
   |  complex and check for specific misalignments, but then we would punish
   |  everyone for a stupid test interface that should just go away.
 
 Regardless of what happens with syscall() that is necessary - user programs
 don't necessarily use nice C interfaces with prototypes, ...  they can do
 anything at all, including constructing completely bogus args on a hand 
 constructed stack frame.    The kernel must always validate all args.   Always.
 
 kre