NetBSD Problem Report #60901

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From: campbell+netbsd@mumble.net
Reply-To: campbell+netbsd@mumble.net
To: gnats-bugs@NetBSD.org
Subject: Unknown elf note type 1081871370
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X-From4GNATS: "campbell+netbsd@mumble.net via gnats" <gnats-admin@NetBSD.org>

>Number:         60901
>Category:       kern
>Synopsis:       Unknown elf note type 1081871370
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          pending-pullups
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Oct 18 18:45:00 +0000 2026
>Closed-Date:    
>Last-Modified:  Sun Nov 15 14:00:04 +0000 2026
>Originator:     Taylor R Campbell
>Release:        
>Organization:
The 
>Environment:
>Description:

	Various GNUish and/or FDOish applications include a new ELF
	note that NetBSD doesn't understand -- and, under DIAGNOSTIC
	builds, complains about not understanding:

/usr/pkg/bin/gsort: Unknown elf note type 1081871370 (unknown tag): [namesz=4, descsz=122 name=FDO ]

	https://mail-index.netbsd.org/current-users/2026/10/14/msg047993.html

	This is a `.note.dlopen' note of type 0x407c0c0a which declares
	a `weak dependency' on some loadable shared library for use by
	freedesktop.org and systemd tools.

>How-To-Repeat:

	build sysutils/coreutils and execute its gsort

>Fix:

	Teach netbsd_elf_note to ignore 0x407c0c0a like it does for
	various others -- and consider nixing the #ifdef DIAGNOSTIC
	logic to spam the console with logs about other elf notes:

	https://nxr.netbsd.org/xref/src/sys/kern/exec_elf.c?r=1.107#983

>Release-Note:

>Audit-Trail:
From: "Taylor R Campbell" <riastradh@netbsd.org>
To: gnats-bugs@gnats.NetBSD.org
Cc: 
Subject: PR/60901 CVS commit: src/sys
Date: Sun, 18 Oct 2026 18:51:08 +0000

 Module Name:	src
 Committed By:	riastradh
 Date:		Sun Oct 18 18:51:08 UTC 2026

 Modified Files:
 	src/sys/kern: exec_elf.c
 	src/sys/sys: exec_elf.h

 Log Message:
 exec_elf: Ignore freedesktop.org dlopen ELF notes.

 PR kern/60901: Unknown elf note type 1081871370


 To generate a diff of this commit:
 cvs rdiff -u -r1.107 -r1.108 src/sys/kern/exec_elf.c
 cvs rdiff -u -r1.186 -r1.187 src/sys/sys/exec_elf.h

 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.

From: "Taylor R Campbell" <riastradh@netbsd.org>
To: gnats-bugs@gnats.NetBSD.org
Cc: 
Subject: PR/60901 CVS commit: src/sys
Date: Mon, 19 Oct 2026 18:44:20 +0000

 Module Name:	src
 Committed By:	riastradh
 Date:		Mon Oct 19 18:44:20 UTC 2026

 Modified Files:
 	src/sys/kern: exec_elf.c
 	src/sys/sys: exec_elf.h

 Log Message:
 exec_elf: Nix diagnostic messages for all (unknown) fd.o notes.

 Same as for unknown GNU notes.  Shaves off a tiny bit of code in
 non-DIAGNOSTIC builds, saves us some trouble when fd.o invariably
 adds more metadata not relevant to execution semantics.

 PR kern/60901: Unknown elf note type 1081871370


 To generate a diff of this commit:
 cvs rdiff -u -r1.108 -r1.109 src/sys/kern/exec_elf.c
 cvs rdiff -u -r1.187 -r1.188 src/sys/sys/exec_elf.h

 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.

State-Changed-From-To: open->needs-pullups
State-Changed-By: riastradh@NetBSD.org
State-Changed-When: Mon, 19 Oct 2026 18:46:21 +0000
State-Changed-Why:
fixed in HEAD, DIAGNOSTIC-only so not a high priority for pullup,
but the fd.o ELF notes have started appearing in pkgsrc builds, so
if anyone runs branches with DIAGNOSTIC (like me) then maybe it's
worthwhile


State-Changed-From-To: needs-pullups->pending-pullups
State-Changed-By: riastradh@NetBSD.org
State-Changed-When: Mon, 09 Nov 2026 08:53:22 +0000
State-Changed-Why:
pullup-11 #575
pullup-10 #1418


From: "David H. Gutteridge" <david@gutteridge.ca>
To: Gnats Bugs <gnats-bugs@netbsd.org>
Cc: 
Subject: Re: kern/60901 (Unknown elf note type 1081871370)
Date: Thu, 12 Nov 2026 18:31:26 -0500

 At the risk of introducing a "Whack-a-Mole" situation, there are more
 of these, e.g.:

 [ 176187.422981] /usr/pkg/bin/lxqt-panel: Unknown elf note type 
 1951465473 (unknown tag): [namesz=12, descsz=66 name=qt-project! ]

From: "Martin Husemann" <martin@netbsd.org>
To: gnats-bugs@gnats.NetBSD.org
Cc: 
Subject: PR/60901 CVS commit: [netbsd-11] src/sys
Date: Sun, 15 Nov 2026 13:58:27 +0000

 Module Name:	src
 Committed By:	martin
 Date:		Sun Nov 15 13:58:27 UTC 2026

 Modified Files:
 	src/sys/kern [netbsd-11]: exec_elf.c
 	src/sys/sys [netbsd-11]: exec_elf.h

 Log Message:
 Pull up following revision(s) (requested by riastradh in ticket #575):

 	sys/kern/exec_elf.c: revision 1.108
 	sys/kern/exec_elf.c: revision 1.109
 	sys/sys/exec_elf.h: revision 1.187
 	sys/sys/exec_elf.h: revision 1.188

 exec_elf: Ignore freedesktop.org dlopen ELF notes.

 PR kern/60901: Unknown elf note type 1081871370
 exec_elf: Nix diagnostic messages for all (unknown) fd.o notes.

 Same as for unknown GNU notes.  Shaves off a tiny bit of code in
 non-DIAGNOSTIC builds, saves us some trouble when fd.o invariably
 adds more metadata not relevant to execution semantics.

 PR kern/60901: Unknown elf note type 1081871370


 To generate a diff of this commit:
 cvs rdiff -u -r1.107 -r1.107.2.1 src/sys/kern/exec_elf.c
 cvs rdiff -u -r1.177 -r1.177.2.1 src/sys/sys/exec_elf.h

 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.

From: "Martin Husemann" <martin@netbsd.org>
To: gnats-bugs@gnats.NetBSD.org
Cc: 
Subject: PR/60901 CVS commit: [netbsd-10] src/sys
Date: Sun, 15 Nov 2026 13:59:49 +0000

 Module Name:	src
 Committed By:	martin
 Date:		Sun Nov 15 13:59:49 UTC 2026

 Modified Files:
 	src/sys/kern [netbsd-10]: exec_elf.c
 	src/sys/sys [netbsd-10]: exec_elf.h

 Log Message:
 Pull up following revision(s) (requested by riastradh in ticket #1418):

 	sys/kern/exec_elf.c: revision 1.108
 	sys/kern/exec_elf.c: revision 1.109
 	sys/sys/exec_elf.h: revision 1.187
 	sys/sys/exec_elf.h: revision 1.188

 exec_elf: Ignore freedesktop.org dlopen ELF notes.

 PR kern/60901: Unknown elf note type 1081871370
 exec_elf: Nix diagnostic messages for all (unknown) fd.o notes.

 Same as for unknown GNU notes.  Shaves off a tiny bit of code in
 non-DIAGNOSTIC builds, saves us some trouble when fd.o invariably
 adds more metadata not relevant to execution semantics.

 PR kern/60901: Unknown elf note type 1081871370


 To generate a diff of this commit:
 cvs rdiff -u -r1.104 -r1.104.2.1 src/sys/kern/exec_elf.c
 cvs rdiff -u -r1.170 -r1.170.4.1 src/sys/sys/exec_elf.h

 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.

>Unformatted:

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