NetBSD Problem Report #42105

From www@NetBSD.org  Mon Sep 21 08:28:15 2009
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Date: Mon, 21 Sep 2009 08:28:15 +0000 (UTC)
From: las_skov@yahoo.dk
Reply-To: las_skov@yahoo.dk
To: gnats-bugs@NetBSD.org
Subject: PT_NOTE - section .note.netbsd.ident missing => crash
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>Number:         42105
>Category:       kern
>Synopsis:       PT_NOTE - section .note.netbsd.ident missing => crash
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Sep 21 08:30:01 +0000 2009
>Last-Modified:  Mon Sep 21 09:15:02 +0000 2009
>Originator:     Lasse Skov
>Release:        NetBSD 5.0.1
>Organization:
None
>Environment:
sorry
>Description:
Elf binary without the note section crashes kern
>How-To-Repeat:
format ELF
public start
section '.text'
 mov eax,1
 push 0
 push 0
 int $80


===
fasm t.asm; ld -e t.o -o t
./t
>Fix:
goto next instead of goto error looks speciel in (elf_exec) 
But crashed my system before testing (not related to problem)

>Audit-Trail:
From: Martin Husemann <martin@duskware.de>
To: gnats-bugs@NetBSD.org
Cc: 
Subject: Re: kern/42105: PT_NOTE - section .note.netbsd.ident missing => crash
Date: Mon, 21 Sep 2009 11:10:02 +0200

 On Mon, Sep 21, 2009 at 08:30:01AM +0000, las_skov@yahoo.dk wrote:
 > Elf binary without the note section crashes kern

 You are creating a binary for some other OS ABI then, in your case
 probably SVR4 - and that is executed with the coresponding emulation, which
 seems to not properly handle error checking.

 Can you get a backtrace from the kernel crash? If you have DDB enabled
 (check sysctl ddb.onpanic) you can do "tr" at the db> prompt. This should
 directly point to the real problem.

 Martin

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