Subject: Re: kern/29133: Fault in Kernelfunction findsym
To: None <cube@netbsd.org, gnats-admin@netbsd.org, netbsd-bugs@netbsd.org>
From: Quentin Garnier <cube@cubidou.net>
List: netbsd-bugs
Date: 01/27/2005 17:10:02
The following reply was made to PR kern/29133; it has been noted by GNATS.

From: Quentin Garnier <cube@cubidou.net>
To: gnats-bugs@netbsd.org
Cc: kern-bug-people@netbsd.org, gnats-admin@netbsd.org,
	netbsd-bugs@netbsd.org
Subject: Re: kern/29133: Fault in Kernelfunction findsym
Date: Thu, 27 Jan 2005 18:09:48 +0100

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 On Thu, Jan 27, 2005 at 01:54:00PM +0000, kessi@teles.de wrote:
 > >Number:         29133
 > >Category:       kern
 > >Synopsis:       Fault in Kernelfunction findsym
 [...]
 > >Description:
 > Loading LKMs with symbols, netstat -inv (/etc/daily) faults in
 > Kernelfunction findsym (kern_ksyms.c).
 >=20
 > After changing the Function (see below, KESSI is not defined), the system=
  is able to netstat -inv. Is this really a Fix?
 >=20
 > static Elf_Sym *
 > findsym(char *name, struct symtab *table, int userreq)
 > {
 > 	Elf_Sym *start =3D table->sd_symstart;
 > 	int i, sz =3D table->sd_symsize/sizeof(Elf_Sym);
 > 	char *np;
 > #ifdef KESSI
 > 	caddr_t realstart =3D table->sd_strstart - (userreq ? 0 : table->sd_usro=
 ffset);
 > #else
 > caddr_t realstart =3D table->sd_strstart - table->sd_usroffset;
 > #endif
 
 Well, it's a workaround more than a fix, and underlines the bug.
 
 I was obviously completely confused about the meaning of all those
 offsets when I wrote that tiny piece of code.  I'll work on a fix
 tonight.
 
 It's weird that this bug has waited for that long to show up.  I
 guess it depends on which LKMs are loaded.
 
 --=20
 Quentin Garnier - cube@cubidou.net - cube@NetBSD.org
 "Commala-come-five! / Even when the shadows rise!
 To see the world and walk the world / Makes ya glad to be alive."
 Susannah's Song, The Dark Tower VI, Stephen King, 2004.
 
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