diff --git a/sys/arm/arm/busdma_machdep.c b/sys/arm/arm/busdma_machdep.c
--- a/sys/arm/arm/busdma_machdep.c
+++ b/sys/arm/arm/busdma_machdep.c
@@ -1027,8 +1027,8 @@
 	} else {
 		if (curaddr == segs[seg].ds_addr + segs[seg].ds_len &&
 		    (segs[seg].ds_len + sgsize) <= dmat->maxsegsz &&
-		    vm_addr_bound_ok(segs[seg].ds_addr, segs[seg].ds_len,
-		    dmat->boundary))
+		    vm_addr_bound_ok(segs[seg].ds_addr,
+		    segs[seg].ds_len + sgsize, dmat->boundary))
 			segs[seg].ds_len += sgsize;
 		else {
 			if (++seg >= dmat->nsegments)
diff --git a/sys/arm64/arm64/busdma_bounce.c b/sys/arm64/arm64/busdma_bounce.c
--- a/sys/arm64/arm64/busdma_bounce.c
+++ b/sys/arm64/arm64/busdma_bounce.c
@@ -787,8 +787,8 @@
 	} else {
 		if (curaddr == segs[seg].ds_addr + segs[seg].ds_len &&
 		    (segs[seg].ds_len + sgsize) <= dmat->common.maxsegsz &&
-		    vm_addr_bound_ok(segs[seg].ds_addr, segs[seg].ds_len,
-		    dmat->common.boundary))
+		    vm_addr_bound_ok(segs[seg].ds_addr,
+		    segs[seg].ds_len + sgsize, dmat->common.boundary))
 			segs[seg].ds_len += sgsize;
 		else {
 			if (++seg >= dmat->common.nsegments)
diff --git a/sys/powerpc/powerpc/busdma_machdep.c b/sys/powerpc/powerpc/busdma_machdep.c
--- a/sys/powerpc/powerpc/busdma_machdep.c
+++ b/sys/powerpc/powerpc/busdma_machdep.c
@@ -708,8 +708,8 @@
 	} else {
 		if (curaddr == segs[seg].ds_addr + segs[seg].ds_len &&
 		    (segs[seg].ds_len + sgsize) <= dmat->maxsegsz &&
-		    vm_addr_bound_ok(segs[seg].ds_addr, segs[seg].ds_len,
-		    dmat->boundary))
+		    vm_addr_bound_ok(segs[seg].ds_addr,
+		    segs[seg].ds_len + sgsize, dmat->boundary))
 			segs[seg].ds_len += sgsize;
 		else {
 			if (++seg >= dmat->nsegments)
diff --git a/sys/riscv/riscv/busdma_bounce.c b/sys/riscv/riscv/busdma_bounce.c
--- a/sys/riscv/riscv/busdma_bounce.c
+++ b/sys/riscv/riscv/busdma_bounce.c
@@ -656,8 +656,8 @@
 	} else {
 		if (curaddr == segs[seg].ds_addr + segs[seg].ds_len &&
 		    (segs[seg].ds_len + sgsize) <= dmat->common.maxsegsz &&
-		    vm_addr_bound_ok(segs[seg].ds_addr, segs[seg].ds_len,
-		    dmat->common.boundary))
+		    vm_addr_bound_ok(segs[seg].ds_addr,
+		    segs[seg].ds_len + sgsize, dmat->common.boundary))
 			segs[seg].ds_len += sgsize;
 		else {
 			if (++seg >= dmat->common.nsegments)
diff --git a/sys/x86/x86/busdma_bounce.c b/sys/x86/x86/busdma_bounce.c
--- a/sys/x86/x86/busdma_bounce.c
+++ b/sys/x86/x86/busdma_bounce.c
@@ -718,8 +718,8 @@
 	} else {
 		if (curaddr == segs[seg].ds_addr + segs[seg].ds_len &&
 		    (segs[seg].ds_len + sgsize) <= dmat->common.maxsegsz &&
-		    vm_addr_bound_ok(segs[seg].ds_addr, segs[seg].ds_len,
-		    dmat->common.boundary))
+		    vm_addr_bound_ok(segs[seg].ds_addr,
+		    segs[seg].ds_len + sgsize, dmat->common.boundary))
 			segs[seg].ds_len += sgsize;
 		else {
 			if (++seg >= dmat->common.nsegments)