https://gitlab.com/psmisc/psmisc/-/issues/35
Partially backported from:
https://gitlab.com/psmisc/psmisc/-/commit/43df1ce70db019f1e0598d083a9f0a955c93174d

--- psmisc-23.4/src/fuser.c
+++ psmisc-23.4/src/fuser.c
@@ -1606,8 +1606,8 @@
 				if (thedev != dev_tmp->device)
 					continue;
 
-				/* check the paths match if it is not a block device */
-				if (! S_ISBLK(dev_tmp->name->st.st_mode)) {
+				/* check the paths match if it is not a block device or socket */
+				if (! S_ISBLK(dev_tmp->name->st.st_mode) && !S_ISSOCK(st.st_mode)) {
 				    if (readlink(filepath, real_filepath, PATH_MAX-1) < 0) {
 					if (strncmp(dev_tmp->name->filename, filepath, strlen(dev_tmp->name->filename)) != 0)
 					    continue;