Index: sys/kern/vfs_bio.c
===================================================================
--- sys/kern/vfs_bio.c
+++ sys/kern/vfs_bio.c
@@ -4188,6 +4188,7 @@
 		}
 		return;
 	}
+	newbsize = round_page(newbsize);
 	vm_hold_free_pages(bp, newbsize);
 	bufspace_adjust(bp, newbsize);
 }
@@ -4219,6 +4220,8 @@
 		return;
 	}
 
+	newbsize = round_page(newbsize);
+
 	/*
 	 * If the buffer is growing on its other-than-first
 	 * allocation then we revert to the page-allocation
@@ -4232,7 +4235,6 @@
 		bp->b_data = bp->b_kvabase;
 		bufmallocadjust(bp, 0);
 		bp->b_flags &= ~B_MALLOC;
-		newbsize = round_page(newbsize);
 	}
 	vm_hold_load_pages(bp, (vm_offset_t) bp->b_data + bp->b_bufsize,
 	    (vm_offset_t) bp->b_data + newbsize);
@@ -4272,8 +4274,6 @@
 
 	newbsize = roundup2(size, DEV_BSIZE);
 	if ((bp->b_flags & B_VMIO) == 0) {
-		if ((bp->b_flags & B_MALLOC) == 0)
-			newbsize = round_page(newbsize);
 		/*
 		 * Just get anonymous memory from the kernel.  Don't
 		 * mess with B_CACHE.