diff --git a/box.c b/box.c
index 830172cdd52345..bfb6f51346be8f 100644
--- a/box.c
+++ b/box.c
@@ -271,7 +271,7 @@ box_entry_free(void *ptr)
     cleanup_all_local_extensions(box->ruby_dln_libmap);
 
     box_root_free(ptr);
-    xfree(ptr);
+    SIZED_FREE(box);
 }
 
 static size_t
diff --git a/marshal.c b/marshal.c
index 1a9e817872eb02..e2a0ce6dd10210 100644
--- a/marshal.c
+++ b/marshal.c
@@ -2350,7 +2350,7 @@ r_object(struct load_arg *arg)
 static void
 clear_load_arg(struct load_arg *arg)
 {
-    xfree(arg->buf);
+    ruby_sized_xfree(arg->buf, BUFSIZ);
     arg->buf = NULL;
     arg->buflen = 0;
     arg->offset = 0;
diff --git a/re.c b/re.c
index 82e9407a0a85ca..0e169694d4e536 100644
--- a/re.c
+++ b/re.c
@@ -1023,7 +1023,7 @@ update_char_offset(VALUE match)
     num_regs = rm->regs.num_regs;
 
     if (rm->char_offset_num_allocated < num_regs) {
-        REALLOC_N(rm->char_offset, struct rmatch_offset, num_regs);
+        SIZED_REALLOC_N(rm->char_offset, struct rmatch_offset, num_regs, rm->char_offset_num_allocated);
         rm->char_offset_num_allocated = num_regs;
     }
 
@@ -1101,7 +1101,7 @@ match_init_copy(VALUE obj, VALUE orig)
 
     if (RMATCH_EXT(orig)->char_offset_num_allocated) {
         if (rm->char_offset_num_allocated < rm->regs.num_regs) {
-            REALLOC_N(rm->char_offset, struct rmatch_offset, rm->regs.num_regs);
+            SIZED_REALLOC_N(rm->char_offset, struct rmatch_offset, rm->regs.num_regs, rm->char_offset_num_allocated);
             rm->char_offset_num_allocated = rm->regs.num_regs;
         }
         MEMCPY(rm->char_offset, RMATCH_EXT(orig)->char_offset,
diff --git a/scheduler.c b/scheduler.c
index b23ddad41e70cc..c2f370a22aee4e 100644
--- a/scheduler.c
+++ b/scheduler.c
@@ -77,19 +77,6 @@ struct rb_fiber_scheduler_blocking_operation {
     volatile rb_atomic_t status;
 };
 
-static void
-blocking_operation_mark(void *ptr)
-{
-    // No Ruby objects to mark in our struct
-}
-
-static void
-blocking_operation_free(void *ptr)
-{
-    rb_fiber_scheduler_blocking_operation_t *blocking_operation = (rb_fiber_scheduler_blocking_operation_t *)ptr;
-    ruby_xfree(blocking_operation);
-}
-
 static size_t
 blocking_operation_memsize(const void *ptr)
 {
@@ -99,11 +86,11 @@ blocking_operation_memsize(const void *ptr)
 static const rb_data_type_t blocking_operation_data_type = {
     "Fiber::Scheduler::BlockingOperation",
     {
-        blocking_operation_mark,
-        blocking_operation_free,
+        NULL, // nothing to mark
+        RUBY_DEFAULT_FREE,
         blocking_operation_memsize,
     },
-    0, 0, RUBY_TYPED_FREE_IMMEDIATELY | RUBY_TYPED_WB_PROTECTED
+    0, 0, RUBY_TYPED_FREE_IMMEDIATELY | RUBY_TYPED_WB_PROTECTED | RUBY_TYPED_EMBEDDABLE
 };
 
 /*
diff --git a/test/rubygems/test_gem_ext_cargo_builder/custom_name/ext/custom_name_lib/Cargo.lock b/test/rubygems/test_gem_ext_cargo_builder/custom_name/ext/custom_name_lib/Cargo.lock
index a5051607c15957..d7638709b5d491 100644
--- a/test/rubygems/test_gem_ext_cargo_builder/custom_name/ext/custom_name_lib/Cargo.lock
+++ b/test/rubygems/test_gem_ext_cargo_builder/custom_name/ext/custom_name_lib/Cargo.lock
@@ -152,18 +152,18 @@ dependencies = [
 
 [[package]]
 name = "rb-sys"
-version = "0.9.123"
+version = "0.9.124"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "45fb1a185af97ee456f1c9e56dbe6e2e662bec4fdeaf83c4c28e0e6adfb18816"
+checksum = "c85c4188462601e2aa1469def389c17228566f82ea72f137ed096f21591bc489"
 dependencies = [
  "rb-sys-build",
 ]
 
 [[package]]
 name = "rb-sys-build"
-version = "0.9.123"
+version = "0.9.124"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a58ebd02d7a6033e6a5f6f8d150c1e9f16506039092b84a73e6bedce6d3adf41"
+checksum = "568068db4102230882e6d4ae8de6632e224ca75fe5970f6e026a04e91ed635d3"
 dependencies = [
  "bindgen",
  "lazy_static",
diff --git a/test/rubygems/test_gem_ext_cargo_builder/custom_name/ext/custom_name_lib/Cargo.toml b/test/rubygems/test_gem_ext_cargo_builder/custom_name/ext/custom_name_lib/Cargo.toml
index 42ac3497a66b14..223b8abd47c2d2 100644
--- a/test/rubygems/test_gem_ext_cargo_builder/custom_name/ext/custom_name_lib/Cargo.toml
+++ b/test/rubygems/test_gem_ext_cargo_builder/custom_name/ext/custom_name_lib/Cargo.toml
@@ -7,4 +7,4 @@ edition = "2021"
 crate-type = ["cdylib"]
 
 [dependencies]
-rb-sys = "0.9.123"
+rb-sys = "0.9.124"
diff --git a/test/rubygems/test_gem_ext_cargo_builder/rust_ruby_example/Cargo.lock b/test/rubygems/test_gem_ext_cargo_builder/rust_ruby_example/Cargo.lock
index efc85ffd5fcbf0..6c41c44c45e403 100644
--- a/test/rubygems/test_gem_ext_cargo_builder/rust_ruby_example/Cargo.lock
+++ b/test/rubygems/test_gem_ext_cargo_builder/rust_ruby_example/Cargo.lock
@@ -145,18 +145,18 @@ dependencies = [
 
 [[package]]
 name = "rb-sys"
-version = "0.9.123"
+version = "0.9.124"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "45fb1a185af97ee456f1c9e56dbe6e2e662bec4fdeaf83c4c28e0e6adfb18816"
+checksum = "c85c4188462601e2aa1469def389c17228566f82ea72f137ed096f21591bc489"
 dependencies = [
  "rb-sys-build",
 ]
 
 [[package]]
 name = "rb-sys-build"
-version = "0.9.123"
+version = "0.9.124"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a58ebd02d7a6033e6a5f6f8d150c1e9f16506039092b84a73e6bedce6d3adf41"
+checksum = "568068db4102230882e6d4ae8de6632e224ca75fe5970f6e026a04e91ed635d3"
 dependencies = [
  "bindgen",
  "lazy_static",
diff --git a/test/rubygems/test_gem_ext_cargo_builder/rust_ruby_example/Cargo.toml b/test/rubygems/test_gem_ext_cargo_builder/rust_ruby_example/Cargo.toml
index 6972bb51750cdf..f1699f2b16e3e2 100644
--- a/test/rubygems/test_gem_ext_cargo_builder/rust_ruby_example/Cargo.toml
+++ b/test/rubygems/test_gem_ext_cargo_builder/rust_ruby_example/Cargo.toml
@@ -7,4 +7,4 @@ edition = "2021"
 crate-type = ["cdylib"]
 
 [dependencies]
-rb-sys = "0.9.123"
+rb-sys = "0.9.124"
diff --git a/variable.c b/variable.c
index ce1873560fcb26..dfd1dfc3c48160 100644
--- a/variable.c
+++ b/variable.c
@@ -1890,7 +1890,7 @@ rb_ensure_iv_list_size(VALUE obj, uint32_t current_len, uint32_t new_capacity)
     RUBY_ASSERT(!rb_shape_obj_too_complex_p(obj));
 
     if (FL_TEST_RAW(obj, ROBJECT_HEAP)) {
-        REALLOC_N(ROBJECT(obj)->as.heap.fields, VALUE, new_capacity);
+        SIZED_REALLOC_N(ROBJECT(obj)->as.heap.fields, VALUE, new_capacity, current_len);
     }
     else {
         VALUE *ptr = ROBJECT_FIELDS(obj);