diff --git a/arch/powerpc/configs/skiroot_defconfig b/arch/powerpc/configs/skiroot_defconfig
index b806a5d3a695d7..c3ba614c973d67 100644
--- a/arch/powerpc/configs/skiroot_defconfig
+++ b/arch/powerpc/configs/skiroot_defconfig
@@ -275,7 +275,6 @@ CONFIG_NLS_UTF8=y
 CONFIG_ENCRYPTED_KEYS=y
 CONFIG_SECURITY=y
 CONFIG_HARDENED_USERCOPY=y
-# CONFIG_HARDENED_USERCOPY_FALLBACK is not set
 CONFIG_HARDENED_USERCOPY_PAGESPAN=y
 CONFIG_FORTIFY_SOURCE=y
 CONFIG_SECURITY_LOCKDOWN_LSM=y
diff --git a/include/linux/slab.h b/include/linux/slab.h
index 837cb16232ef4d..181045148b0654 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -142,8 +142,6 @@ struct mem_cgroup;
 void __init kmem_cache_init(void);
 bool slab_is_available(void);
 
-extern bool usercopy_fallback;
-
 struct kmem_cache *kmem_cache_create(const char *name, unsigned int size,
 			unsigned int align, slab_flags_t flags,
 			void (*ctor)(void *));
diff --git a/mm/slab.c b/mm/slab.c
index 64ec17a3bc2ba2..da132a9ae6f8be 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -4204,19 +4204,6 @@ void __check_heap_object(const void *ptr, unsigned long n, struct page *page,
 	    n <= cachep->useroffset - offset + cachep->usersize)
 		return;
 
-	/*
-	 * If the copy is still within the allocated object, produce
-	 * a warning instead of rejecting the copy. This is intended
-	 * to be a temporary method to find any missing usercopy
-	 * whitelists.
-	 */
-	if (usercopy_fallback &&
-	    offset <= cachep->object_size &&
-	    n <= cachep->object_size - offset) {
-		usercopy_warn("SLAB object", cachep->name, to_user, offset, n);
-		return;
-	}
-
 	usercopy_abort("SLAB object", cachep->name, to_user, offset, n);
 }
 #endif /* CONFIG_HARDENED_USERCOPY */
diff --git a/mm/slab_common.c b/mm/slab_common.c
index ec2bb0beed757c..e5d080a9300933 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -37,14 +37,6 @@ LIST_HEAD(slab_caches);
 DEFINE_MUTEX(slab_mutex);
 struct kmem_cache *kmem_cache;
 
-#ifdef CONFIG_HARDENED_USERCOPY
-bool usercopy_fallback __ro_after_init =
-		IS_ENABLED(CONFIG_HARDENED_USERCOPY_FALLBACK);
-module_param(usercopy_fallback, bool, 0400);
-MODULE_PARM_DESC(usercopy_fallback,
-		"WARN instead of reject usercopy whitelist violations");
-#endif
-
 static LIST_HEAD(slab_caches_to_rcu_destroy);
 static void slab_caches_to_rcu_destroy_workfn(struct work_struct *work);
 static DECLARE_WORK(slab_caches_to_rcu_destroy_work,
diff --git a/mm/slub.c b/mm/slub.c
index e9a51dcf8bf9a0..432145d7b4ec50 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -4489,7 +4489,6 @@ void __check_heap_object(const void *ptr, unsigned long n, struct page *page,
 {
 	struct kmem_cache *s;
 	unsigned int offset;
-	size_t object_size;
 	bool is_kfence = is_kfence_address(ptr);
 
 	ptr = kasan_reset_tag(ptr);
@@ -4522,19 +4521,6 @@ void __check_heap_object(const void *ptr, unsigned long n, struct page *page,
 	    n <= s->useroffset - offset + s->usersize)
 		return;
 
-	/*
-	 * If the copy is still within the allocated object, produce
-	 * a warning instead of rejecting the copy. This is intended
-	 * to be a temporary method to find any missing usercopy
-	 * whitelists.
-	 */
-	object_size = slab_ksize(s);
-	if (usercopy_fallback &&
-	    offset <= object_size && n <= object_size - offset) {
-		usercopy_warn("SLUB object", s->name, to_user, offset, n);
-		return;
-	}
-
 	usercopy_abort("SLUB object", s->name, to_user, offset, n);
 }
 #endif /* CONFIG_HARDENED_USERCOPY */
diff --git a/security/Kconfig b/security/Kconfig
index 0ced7fd33e4d0d..d9698900c9b730 100644
--- a/security/Kconfig
+++ b/security/Kconfig
@@ -163,20 +163,6 @@ config HARDENED_USERCOPY
 	  or are part of the kernel text. This kills entire classes
 	  of heap overflow exploits and similar kernel memory exposures.
 
-config HARDENED_USERCOPY_FALLBACK
-	bool "Allow usercopy whitelist violations to fallback to object size"
-	depends on HARDENED_USERCOPY
-	default y
-	help
-	  This is a temporary option that allows missing usercopy whitelists
-	  to be discovered via a WARN() to the kernel log, instead of
-	  rejecting the copy, falling back to non-whitelisted hardened
-	  usercopy that checks the slab allocation size instead of the
-	  whitelist size. This option will be removed once it seems like
-	  all missing usercopy whitelists have been identified and fixed.
-	  Booting with "slab_common.usercopy_fallback=Y/N" can change
-	  this setting.
-
 config HARDENED_USERCOPY_PAGESPAN
 	bool "Refuse to copy allocations that span multiple pages"
 	depends on HARDENED_USERCOPY