From: Hao Li <hao.li@linux.dev>
Date: Thu, 5 Feb 2026 12:07:23 +0000 (+0800)
Subject: slub: let need_slab_obj_exts() return false if SLAB_NO_OBJ_EXT is set
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=98e99fc4ad4b30dd28c09ba19686ec583af345b4;p=thirdparty%2Fkernel%2Flinux.git

slub: let need_slab_obj_exts() return false if SLAB_NO_OBJ_EXT is set

SLAB_NO_OBJ_EXT is set for boot caches, but need_slab_obj_exts() doesn't
check this flag. We should return false unconditionally when
SLAB_NO_OBJ_EXT is set.

Signed-off-by: Hao Li <hao.li@linux.dev>
Acked-by: Harry Yoo <harry.yoo@oracle.com>
Link: https://patch.msgid.link/20260205120709.425719-1-hao.li@linux.dev
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
---

diff --git a/mm/slub.c b/mm/slub.c
index 18ac9460f9e9..6fac2b123b42 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -898,6 +898,9 @@ static inline unsigned long get_orig_size(struct kmem_cache *s, void *object)
  */
 static inline bool need_slab_obj_exts(struct kmem_cache *s)
 {
+	if (s->flags & SLAB_NO_OBJ_EXT)
+		return false;
+
 	if (memcg_kmem_online() && (s->flags & SLAB_ACCOUNT))
 		return true;