1 files changed, 21 insertions, 0 deletions
diff --git a/src/libudev/libudev-enumerate.c b/src/libudev/libudev-enumerate.c
index 255fbe808d..df088946df 100644
--- a/src/libudev/libudev-enumerate.c
+++ b/src/libudev/libudev-enumerate.c
@@ -196,6 +196,9 @@ _public_ struct udev_list_entry *udev_enumerate_get_list_entry(struct udev_enume
 _public_ int udev_enumerate_add_match_subsystem(struct udev_enumerate *udev_enumerate, const char *subsystem) {
         assert_return(udev_enumerate, -EINVAL);
 
+        if (!subsystem)
+                return 0;
+
         return sd_device_enumerator_add_match_subsystem(udev_enumerate->enumerator, subsystem, true);
 }
 
@@ -211,6 +214,9 @@ _public_ int udev_enumerate_add_match_subsystem(struct udev_enumerate *udev_enum
 _public_ int udev_enumerate_add_nomatch_subsystem(struct udev_enumerate *udev_enumerate, const char *subsystem) {
         assert_return(udev_enumerate, -EINVAL);
 
+        if (!subsystem)
+                return 0;
+
         return sd_device_enumerator_add_match_subsystem(udev_enumerate->enumerator, subsystem, false);
 }
 
@@ -227,6 +233,9 @@ _public_ int udev_enumerate_add_nomatch_subsystem(struct udev_enumerate *udev_en
 _public_ int udev_enumerate_add_match_sysattr(struct udev_enumerate *udev_enumerate, const char *sysattr, const char *value) {
         assert_return(udev_enumerate, -EINVAL);
 
+        if (!sysattr)
+                return 0;
+
         return sd_device_enumerator_add_match_sysattr(udev_enumerate->enumerator, sysattr, value, true);
 }
 
@@ -243,6 +252,9 @@ _public_ int udev_enumerate_add_match_sysattr(struct udev_enumerate *udev_enumer
 _public_ int udev_enumerate_add_nomatch_sysattr(struct udev_enumerate *udev_enumerate, const char *sysattr, const char *value) {
         assert_return(udev_enumerate, -EINVAL);
 
+        if (!sysattr)
+                return 0;
+
         return sd_device_enumerator_add_match_sysattr(udev_enumerate->enumerator, sysattr, value, false);
 }
 
@@ -259,6 +271,9 @@ _public_ int udev_enumerate_add_nomatch_sysattr(struct udev_enumerate *udev_enum
 _public_ int udev_enumerate_add_match_property(struct udev_enumerate *udev_enumerate, const char *property, const char *value) {
         assert_return(udev_enumerate, -EINVAL);
 
+        if (!property)
+                return 0;
+
         return sd_device_enumerator_add_match_property(udev_enumerate->enumerator, property, value);
 }
 
@@ -274,6 +289,9 @@ _public_ int udev_enumerate_add_match_property(struct udev_enumerate *udev_enume
 _public_ int udev_enumerate_add_match_tag(struct udev_enumerate *udev_enumerate, const char *tag) {
         assert_return(udev_enumerate, -EINVAL);
 
+        if (!tag)
+                return 0;
+
         return sd_device_enumerator_add_match_tag(udev_enumerate->enumerator, tag);
 }
 
@@ -335,6 +353,9 @@ _public_ int udev_enumerate_add_match_is_initialized(struct udev_enumerate *udev
 _public_ int udev_enumerate_add_match_sysname(struct udev_enumerate *udev_enumerate, const char *sysname) {
         assert_return(udev_enumerate, -EINVAL);
 
+        if (!sysname)
+                return 0;
+
         return sd_device_enumerator_add_match_sysname(udev_enumerate->enumerator, sysname);
 }