Continue to handle the case where state is NULL, though this currently

cannot happen on FreeBSD. r278136 overlooked the fact that a destructor
registered with devfs_set_cdevpriv(9) is invoked even in the case of an
error.

X-MFC-With:	r278136

1 files changed, 13 insertions, 4 deletions

diff --git a/sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c b/sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c
index 4251366..ffd0ef5 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c
@@ -14174,7 +14174,7 @@ dtrace_state_create(struct cdev *dev)
 	if (dev != NULL) {
 		cr = dev->si_cred;
 		m = dev2unit(dev);
-		}
+	}
 
 	/* Allocate memory for the state. */
 	state = kmem_zalloc(sizeof(dtrace_state_t), KM_SLEEP);
@@ -16841,7 +16841,12 @@ dtrace_dtr(void *data)
 	mutex_enter(&cpu_lock);
 	mutex_enter(&dtrace_lock);
 
-	if (state->dts_anon) {
+#ifdef illumos
+	if (state->dts_anon)
+#else
+	if (state != NULL && state->dts_anon)
+#endif
+	{
 		/*
 		 * There is anonymous state. Destroy that first.
 		 */
@@ -16849,9 +16854,13 @@ dtrace_dtr(void *data)
 		dtrace_state_destroy(state->dts_anon);
 	}
 
+#ifdef illumos
 	dtrace_state_destroy(state);
-#ifndef illumos
-	kmem_free(state, 0);
+#else
+	if (state == NULL) {
+		dtrace_state_destroy(state);
+		kmem_free(state, 0);
+	}
 #endif
 	ASSERT(dtrace_opens > 0);