linux-kernel - Re: [PATCH] arch/powerpc: Remove .interp section in vmlinux

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20251015182754.GA1055324@ax162>
Date: Wed, 15 Oct 2025 11:27:54 -0700
From: Nathan Chancellor <nathan@...nel.org>
To: Vishal Chourasia <vishalc@...ux.ibm.com>
Cc: Christophe Leroy <christophe.leroy@...roup.eu>, maddy@...ux.ibm.com,
	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	clang-built-linux@...glegroups.com,
	"llvm@...ts.linux.dev" <llvm@...ts.linux.dev>
Subject: Re: [PATCH] arch/powerpc: Remove .interp section in vmlinux

On Wed, Oct 15, 2025 at 09:07:54AM +0530, Vishal Chourasia wrote:
> Hello Nathan,
> 
> On Tue, Oct 14, 2025 at 05:21:54PM -0700, Nathan Chancellor wrote:
> > In this bug report, you mention using LLVM=1. Does the issue happen if
> > you use GNU ld (ld.bfd) via LD (i.e., LD=powerpc64le-linux-gnu-ld or
> > equivalent) over ld.lld from LLVM=1? This sounds more likely to be a
> > linker difference rather than a compiler difference.
> 
> Thank you for the insight.
> 
> Yes, when using powerpc64le-linux-gnu-ld linker .interp section is not
> emitted.
> 
> Command:
> $ make LLVM=1 ARCH=powerpc LD=powerpc64le-linux-gnu-ld -j 8 zImage
> $ llvm-readelf -p .comment vmlinux
> 
> String dump of section '.comment':
> [     0] clang version 22.0.0git (https://github.com/llvm/llvm-project.git 7314565281ec28b745502c3f429fd431e16673eb)
> 
> $ llvm-readelf -p .interp vmlinux                                                                                    
> llvm-readelf: warning: 'vmlinux': could not find section '.interp'

Thanks for confirming. Does this fix the issue for you? It appears to
work for me.

Cheers,
Nathan

diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index de6ee7d35cff..15850296c0a9 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -330,7 +330,6 @@ SECTIONS
 	}
 	.hash : AT(ADDR(.hash) - LOAD_OFFSET) { *(.hash) }
 	.gnu.hash : AT(ADDR(.gnu.hash) - LOAD_OFFSET) { *(.gnu.hash) }
-	.interp : AT(ADDR(.interp) - LOAD_OFFSET) { *(.interp) }
 	.rela.dyn : AT(ADDR(.rela.dyn) - LOAD_OFFSET)
 	{
 		__rela_dyn_start = .;