limit $attr(<symlink>) magic to well-known links only

1 files changed, 6 insertions, 1 deletions

diff --git a/udev/lib/libudev-device.c b/udev/lib/libudev-device.c
index c4714e4088..055263bbef 100644
--- a/udev/lib/libudev-device.c
+++ b/udev/lib/libudev-device.c
@@ -859,11 +859,16 @@ const char *udev_device_get_sysattr_value(struct udev_device *udev_device, const
 	}
 
 	if (S_ISLNK(statbuf.st_mode)) {
-		/* links return the last element of the target path */
 		char target[UTIL_NAME_SIZE];
 		int len;
 		char *pos;
 
+		/* some core links return the last element of the target path */
+		if (strcmp(sysattr, "driver") != 0 &&
+		    strcmp(sysattr, "subsystem") != 0 &&
+		    strcmp(sysattr, "module") != 0)
+			goto out;
+
 		len = readlink(path, target, sizeof(target));
 		if (len > 0) {
 			target[len] = '\0';