1 files changed, 10 insertions, 0 deletions

diff --git a/sys/cddl/dev/dtmalloc/dtmalloc.c b/sys/cddl/dev/dtmalloc/dtmalloc.c
index ca822f988668..81ff43f92131 100644
--- a/sys/cddl/dev/dtmalloc/dtmalloc.c
+++ b/sys/cddl/dev/dtmalloc/dtmalloc.c
@@ -28,6 +28,7 @@
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/conf.h>
+#include <sys/ctype.h>
 #include <sys/kernel.h>
 #include <sys/malloc.h>
 #include <sys/module.h>
@@ -111,8 +112,17 @@ dtmalloc_type_cb(struct malloc_type *mtp, void *arg __unused)
 {
 	char name[DTRACE_FUNCNAMELEN];
 	struct malloc_type_internal *mtip = mtp->ks_handle;
+	int i;
 
+	/*
+	 * malloc_type descriptions are allowed to contain whitespace, but
+	 * DTrace probe identifiers are not, so replace the whitespace with
+	 * underscores.
+	 */
 	strlcpy(name, mtp->ks_shortdesc, sizeof(name));
+	for (i = 0; name[i] != 0; i++)
+		if (isspace(name[i]))
+			name[i] = '_';
 
 	if (dtrace_probe_lookup(dtmalloc_id, NULL, name, "malloc") != 0)
 		return;