NetBSD Problem Report #46761

From simonb@thistledown.com.au  Tue Jul 31 11:13:08 2012
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Date: Tue, 31 Jul 2012 21:13:04 +1000 (EST)
From: Simon Burge <simonb@NetBSD.org>
Reply-To: Simon Burge <simonb@NetBSD.org>
To: gnats-bugs@gnats.NetBSD.org
Subject: "bad tag" message running old binary
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>Number:         46761
>Category:       kern
>Synopsis:       "bad tag" message on console when running old binary
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Jul 31 11:15:00 +0000 2012
>Last-Modified:  Wed Aug 01 17:50:02 +0000 2012
>Originator:     Simon Burge
>Release:        NetBSD 6.0_BETA2 (sources from July 16)
>Environment:
System: NetBSD silmech.thistledown.com.au 6.0_BETA2 NetBSD 6.0_BETA2 (GENERIC) #0: Mon Jul 16 23:29:03 EST 2012  simonb@silmech.thistledown.com.au:/home/simonb/netbsd/build6/amd64/obj/home/simonb/netbsd/src6/sys/arch/amd64/compile/GENERIC amd64
Architecture: amd64
Machine: amd64
>Description:
	When trying to run an old i386 ELF binary on an amd64 machine
	this message appears on the console:

		/usr/local/bin/bd: bad tag 1: [8 4, 0 4, 01.0  PaX]

	Here is some details on the binary:

	silmech 11> ls -l /usr/local/bin/bd
	-r-xr-xr-x  1 root  wheel  4712 Jul  4  2002 /usr/local/bin/bd*
	silmech 12> file /usr/local/bin/bd
	/usr/local/bin/bd: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked (uses shared libs), for NetBSD, stripped
	silmech 13> readelf -h /usr/local/bin/bd
	ELF Header:
	  Magic:   7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00 
	  Class:                             ELF32
	  Data:                              2's complement, little endian
	  Version:                           1 (current)
	  OS/ABI:                            UNIX - System V
	  ABI Version:                       0
	  Type:                              EXEC (Executable file)
	  Machine:                           Intel 80386
	  Version:                           0x1
	  Entry point address:               0x8048714
	  Start of program headers:          52 (bytes into file)
	  Start of section headers:          3672 (bytes into file)
	  Flags:                             0x0
	  Size of this header:               52 (bytes)
	  Size of program headers:           32 (bytes)
	  Number of program headers:         6
	  Size of section headers:           40 (bytes)
	  Number of section headers:         26
	  Section header string table index: 25
	silmech 14> ldd /usr/local/bin/bd
	/usr/local/bin/bd:
		-lc.12 => /usr/lib/i386/libc.so.12

	The same warning appears for other binaries of a similar
	vintage.  Another binary built in 2007 doesn't cause the
	message to appear on the console.

>How-To-Repeat:
	Run an old(ish) i386 ELF binary.  Binary available if required.

>Fix:
	None given.

>Audit-Trail:
From: Robert Elz <kre@munnari.OZ.AU>
To: gnats-bugs@NetBSD.org
Cc: 
Subject: Re: kern/46761: "bad tag" message running old binary
Date: Thu, 02 Aug 2012 00:25:44 +0700

 I have seen that too, running similar vintage (last compiled Oct 2000 or so)
 i386 binaries, running under an i386 6.0_BETA type kernel.  On current, on
 an amd64 kernel, I get ...

 Aug  2 00:26:37 minerva /netbsd: ./fdate: Unknown elf note type 1: [namesz=8, descsz=0 name=   01.01]

 kre

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