linux-kernel - [PATCH 1/2] [RFC] debugobjects: avoid gcc-16.0.1 section mismatch

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 for Android: free password hash cracker in your pocket

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

Message-Id: <20260203162406.2215716-1-arnd@kernel.org>
Date: Tue,  3 Feb 2026 17:23:59 +0100
From: Arnd Bergmann <arnd@...nel.org>
To: Will Deacon <will@...nel.org>,
	Robin Murphy <robin.murphy@....com>,
	Joerg Roedel <joro@...tes.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...nel.org>
Cc: linux-arm-kernel@...ts.infradead.org,
	iommu@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Arnd Bergmann <arnd@...db.de>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: [PATCH 1/2] [RFC] debugobjects: avoid gcc-16.0.1 section mismatch

From: Arnd Bergmann <arnd@...db.de>

gcc-16 has gained some more advanced inlining techniques that enable
it to inline the is_static_object() function pointer into a specialized
version of lookup_object_or_alloc:

WARNING: modpost: vmlinux: section mismatch in reference: lookup_object_or_alloc.part.0+0x1ac (section: .text) -> is_static_object (section: .init.text)

>From what I can tell, the transformation is correct, as this
is only called when lookup_object_or_alloc() is called from
debug_objects_selftest(), which is also __init.

I have not come up with a good workaround, so this simply marks
is_static_object() as not __init. Since there are currently only two
files where this happens, that may be an easy way out.

If anyone has a better idea for how to deal with that, let me know!

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 lib/debugobjects.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/debugobjects.c b/lib/debugobjects.c
index 89a1d6745dc2..056957c4e52f 100644
--- a/lib/debugobjects.c
+++ b/lib/debugobjects.c
@@ -1195,7 +1195,7 @@ struct self_test {
 
 static __initconst const struct debug_obj_descr descr_type_test;
 
-static bool __init is_static_object(void *addr)
+static bool is_static_object(void *addr)
 {
 	struct self_test *obj = addr;
 
-- 
2.39.5