Index: sys/compat/linux/linux.c
===================================================================
--- sys/compat/linux/linux.c
+++ sys/compat/linux/linux.c
@@ -50,6 +50,7 @@
 
 #include <compat/linux/linux.h>
 #include <compat/linux/linux_common.h>
+#include <compat/linux/linux_mib.h>
 #include <compat/linux/linux_util.h>
 
 struct futex_list futex_list;
@@ -501,22 +502,26 @@
 		salen = sizeof(struct sockaddr_in);
 	}
 
-	if (bdom == AF_LOCAL && salen > sizeof(struct sockaddr_un)) {
+	if (bdom == AF_LOCAL) {
 		hdrlen = offsetof(struct sockaddr_un, sun_path);
 		name = ((struct sockaddr_un *)kosa)->sun_path;
-		if (*name == '\0') {
+		if (*name == '\0' && linux_abstract_pathnames) {
 			/*
 			 * Linux abstract namespace starts with a NULL byte.
-			 * XXX We do not support abstract namespace yet.
+			 * By default we pretend they are ordinary pathnames.
 			 */
-			namelen = strnlen(name + 1, salen - hdrlen - 1) + 1;
-		} else
+			namelen = strnlen(name + 1, salen - hdrlen - 1);
+			memmove(name, name + 1, namelen);
+			salen = hdrlen + namelen;
+		} else if (salen > sizeof(struct sockaddr_un)) {
 			namelen = strnlen(name, salen - hdrlen);
-		salen = hdrlen + namelen;
+			salen = hdrlen + namelen;
+		}
 		if (salen > sizeof(struct sockaddr_un)) {
 			error = ENAMETOOLONG;
 			goto out;
 		}
+
 	}
 
 	sa = (struct sockaddr *)kosa;
Index: sys/compat/linux/linux_mib.h
===================================================================
--- sys/compat/linux/linux_mib.h
+++ sys/compat/linux/linux_mib.h
@@ -62,6 +62,7 @@
 
 #define	linux_use26(t)		(linux_kernver(t) >= LINUX_KERNVER_2006000)
 
+extern bool linux_abstract_pathnames;
 extern int linux_debug;
 extern int linux_default_openfiles;
 extern int linux_default_stacksize;
Index: sys/compat/linux/linux_mib.c
===================================================================
--- sys/compat/linux/linux_mib.c
+++ sys/compat/linux/linux_mib.c
@@ -82,6 +82,11 @@
     &linux_dummy_rlimits, 0,
     "Return dummy values for unsupported Linux-specific rlimits");
 
+bool linux_abstract_pathnames = 1;
+SYSCTL_BOOL(_compat_linux, OID_AUTO, abstract_pathnames, CTLFLAG_RWTUN,
+    &linux_abstract_pathnames, 0,
+    "Handle abstract unix(7) sockets as pathnames");
+
 int linux_ignore_ip_recverr = 1;
 SYSCTL_INT(_compat_linux, OID_AUTO, ignore_ip_recverr, CTLFLAG_RWTUN,
     &linux_ignore_ip_recverr, 0, "Ignore enabling IP_RECVERR");