diff --git a/sys/compat/linuxkpi/common/include/linux/slab.h b/sys/compat/linuxkpi/common/include/linux/slab.h
--- a/sys/compat/linuxkpi/common/include/linux/slab.h
+++ b/sys/compat/linuxkpi/common/include/linux/slab.h
@@ -93,7 +93,9 @@
 
 extern void *lkpi_kmalloc(size_t size, gfp_t flags);
 void *lkpi___kmalloc(size_t size, gfp_t flags);
+void *lkpi___kmalloc_node(size_t size, gfp_t flags, int node);
 #define	__kmalloc(_s, _f)	lkpi___kmalloc(_s, _f)
+void *lkpi_krealloc(void *, size_t, gfp_t);
 
 static inline gfp_t
 linux_check_m_flags(gfp_t flags)
@@ -113,77 +115,79 @@
 static inline void *
 kmalloc_node(size_t size, gfp_t flags, int node)
 {
-	return (malloc_domainset(size, M_KMALLOC,
-	    linux_get_vm_domain_set(node), linux_check_m_flags(flags)));
+	return (lkpi___kmalloc_node(size, flags, node));
 }
 
 static inline void *
-kcalloc(size_t n, size_t size, gfp_t flags)
+kmalloc_array(size_t n, size_t size, gfp_t flags)
 {
-	flags |= __GFP_ZERO;
-	return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags)));
+	if (WOULD_OVERFLOW(n, size))
+		panic("%s: %zu * %zu overflowed", __func__, n, size);
+
+	return (kmalloc(size * n, flags));
 }
 
 static inline void *
-kcalloc_node(size_t n, size_t size, gfp_t flags, int node)
+kcalloc(size_t n, size_t size, gfp_t flags)
 {
 	flags |= __GFP_ZERO;
-	return (mallocarray_domainset(n, size, M_KMALLOC,
-	    linux_get_vm_domain_set(node), linux_check_m_flags(flags)));
+	return (kmalloc_array(n, size, linux_check_m_flags(flags)));
 }
 
 static inline void *
-__vmalloc(size_t size, gfp_t flags, int other)
+kmalloc_array_node(size_t n, size_t size, gfp_t flags, int node)
 {
-	return (malloc(size, M_KMALLOC, linux_check_m_flags(flags)));
+	if (WOULD_OVERFLOW(n, size))
+		panic("%s: %zu * %zu overflowed", __func__, n, size);
+
+	return (kmalloc_node(size * n, flags, node));
 }
 
 static inline void *
-__vmalloc_node(size_t size, gfp_t flags, int node)
+kcalloc_node(size_t n, size_t size, gfp_t flags, int node)
 {
-	return (malloc_domainset(size, M_KMALLOC,
-	    linux_get_vm_domain_set(node), linux_check_m_flags(flags)));
+	flags |= __GFP_ZERO;
+	return (kmalloc_array_node(n, size, flags, node));
 }
 
 static inline void *
-vmalloc_32(size_t size)
+krealloc(void *ptr, size_t size, gfp_t flags)
 {
-	return (contigmalloc(size, M_KMALLOC, M_WAITOK, 0, UINT_MAX, 1, 1));
+	return (lkpi_krealloc(ptr, size, flags));
 }
 
 static inline void *
-kmalloc_array(size_t n, size_t size, gfp_t flags)
+krealloc_array(void *ptr, size_t n, size_t size, gfp_t flags)
 {
-	return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags)));
+	if (WOULD_OVERFLOW(n, size))
+		return NULL;
+
+	return (krealloc(ptr, n * size, flags));
 }
 
 static inline void *
-kmalloc_array_node(size_t n, size_t size, gfp_t flags, int node)
+__vmalloc(size_t size, gfp_t flags, int other)
 {
-	return (mallocarray_domainset(n, size, M_KMALLOC,
-	    linux_get_vm_domain_set(node), linux_check_m_flags(flags)));
+	return (malloc(size, M_KMALLOC, linux_check_m_flags(flags)));
 }
 
 static inline void *
-kvmalloc_array(size_t n, size_t size, gfp_t flags)
+__vmalloc_node(size_t size, gfp_t flags, int node)
 {
-	return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags)));
+	return (malloc_domainset(size, M_KMALLOC,
+	    linux_get_vm_domain_set(node), linux_check_m_flags(flags)));
 }
 
 static inline void *
-krealloc(void *ptr, size_t size, gfp_t flags)
+vmalloc_32(size_t size)
 {
-	return (realloc(ptr, size, M_KMALLOC, linux_check_m_flags(flags)));
+	return (contigmalloc(size, M_KMALLOC, M_WAITOK, 0, UINT_MAX, 1, 1));
 }
 
 static inline void *
-krealloc_array(void *ptr, size_t n, size_t size, gfp_t flags)
+kvmalloc_array(size_t n, size_t size, gfp_t flags)
 {
-	if (WOULD_OVERFLOW(n, size)) {
-		return NULL;
-	}
-
-	return (realloc(ptr, n * size, M_KMALLOC, linux_check_m_flags(flags)));
+	return (kmalloc_array(n, size, linux_check_m_flags(flags)));
 }
 
 extern void linux_kfree_async(void *);
diff --git a/sys/compat/linuxkpi/common/src/linux_compat.c b/sys/compat/linuxkpi/common/src/linux_compat.c
--- a/sys/compat/linuxkpi/common/src/linux_compat.c
+++ b/sys/compat/linuxkpi/common/src/linux_compat.c
@@ -2767,8 +2767,8 @@
 	boot_cpu_data.x86_model = CPUID_TO_MODEL(cpu_id);
 	boot_cpu_data.x86_vendor = x86_vendor;
 
-	__cpu_data = mallocarray(mp_maxid + 1,
-	    sizeof(*__cpu_data), M_KMALLOC, M_WAITOK | M_ZERO);
+	__cpu_data = kmalloc_array(mp_maxid + 1,
+	    sizeof(*__cpu_data), M_WAITOK | M_ZERO);
 	CPU_FOREACH(i) {
 		__cpu_data[i].x86_clflush_size = cpu_clflush_line_size;
 		__cpu_data[i].x86_max_cores = mp_ncpus;
@@ -2810,8 +2810,8 @@
 	 * This is used by cpumask_of() (and possibly others in the future) for,
 	 * e.g., drivers to pass hints to irq_set_affinity_hint().
 	 */
-	static_single_cpu_mask = mallocarray(mp_maxid + 1,
-	    sizeof(static_single_cpu_mask), M_KMALLOC, M_WAITOK | M_ZERO);
+	static_single_cpu_mask = kmalloc_array(mp_maxid + 1,
+	    sizeof(static_single_cpu_mask), M_WAITOK | M_ZERO);
 
 	/*
 	 * When the number of CPUs reach a threshold, we start to save memory
@@ -2830,9 +2830,9 @@
 		 * (_BITSET_BITS / 8)' bytes (for comparison with the
 		 * overlapping scheme).
 		 */
-		static_single_cpu_mask_lcs = mallocarray(mp_ncpus,
+		static_single_cpu_mask_lcs = kmalloc_array(mp_ncpus,
 		    sizeof(*static_single_cpu_mask_lcs),
-		    M_KMALLOC, M_WAITOK | M_ZERO);
+		    M_WAITOK | M_ZERO);
 
 		sscm_ptr = static_single_cpu_mask_lcs;
 		CPU_FOREACH(i) {
diff --git a/sys/compat/linuxkpi/common/src/linux_slab.c b/sys/compat/linuxkpi/common/src/linux_slab.c
--- a/sys/compat/linuxkpi/common/src/linux_slab.c
+++ b/sys/compat/linuxkpi/common/src/linux_slab.c
@@ -207,6 +207,18 @@
 	free(c, M_KMALLOC);
 }
 
+void *
+lkpi___kmalloc_node(size_t size, gfp_t flags, int node)
+{
+	if (size <= PAGE_SIZE)
+		return (malloc_domainset(size, M_KMALLOC,
+		    linux_get_vm_domain_set(node), linux_check_m_flags(flags)));
+	else
+		return (contigmalloc_domainset(size, M_KMALLOC,
+		    linux_get_vm_domain_set(node), linux_check_m_flags(flags),
+		    0, -1UL, PAGE_SIZE, 0));
+}
+
 void *
 lkpi___kmalloc(size_t size, gfp_t flags)
 {
@@ -222,6 +234,40 @@
 		    0, -1UL, PAGE_SIZE, 0));
 }
 
+void *
+lkpi_krealloc(void *ptr, size_t size, gfp_t flags)
+{
+	void *nptr;
+	size_t osize;
+
+	/*
+	 * First handle invariants based on function arguments.
+	 */
+	if (ptr == NULL)
+		return (kmalloc(size, flags));
+
+	osize = ksize(ptr);
+	if (size <= osize)
+		return (ptr);
+
+	/*
+	 * We know the new size > origonal size.  realloc(9) does not (and cannot)
+	 * know about our requirements for physically contiguous memory, so we can
+	 * only call it up-to including PAGE_SIZE and otherwise have to replicate
+	 * its functionality using kmalloc to get the contigmalloc(9) backing.
+	 */
+	if (size <= PAGE_SIZE)
+		return (realloc(ptr, size, M_KMALLOC, linux_check_m_flags(flags)));
+
+	nptr = kmalloc(size, flags);
+	if (nptr == NULL)
+		return (NULL);
+
+	memcpy(nptr, ptr, osize);
+	kfree(ptr);
+	return (nptr);
+}
+
 struct lkpi_kmalloc_ctx {
 	size_t size;
 	gfp_t flags;
diff --git a/sys/kern/kern_malloc.c b/sys/kern/kern_malloc.c
--- a/sys/kern/kern_malloc.c
+++ b/sys/kern/kern_malloc.c
@@ -1142,6 +1142,9 @@
 	case SLAB_COOKIE_MALLOC_LARGE:
 		size = malloc_large_size(slab);
 		break;
+	case SLAB_COOKIE_CONTIG_MALLOC:
+		size = round_page(contigmalloc_size(slab));
+		break;
 	default:
 		__assert_unreachable();
 		size = 0;