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-rw-r--r--sysdeps/mach/hurd/getpeername.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/sysdeps/mach/hurd/getpeername.c b/sysdeps/mach/hurd/getpeername.c
index 39071c1da4..325b6fd75d 100644
--- a/sysdeps/mach/hurd/getpeername.c
+++ b/sysdeps/mach/hurd/getpeername.c
@@ -55,11 +55,14 @@ __getpeername (int fd, __SOCKADDR_ARG addrarg, socklen_t *len)
     }
 
   const sa_family_t family = type;
-  if (*len < (char *) (&addr->sa_family + 1) - (char *) addr)
-    memcpy (&addr->sa_family, &family,
-	    *len - offsetof (struct sockaddr, sa_family));
-  else
-    addr->sa_family = family;
+  if (*len > offsetof (struct sockaddr, sa_family))
+    {
+      if (*len < (char *) (&addr->sa_family + 1) - (char *) addr)
+	memcpy (&addr->sa_family, &family,
+		*len - offsetof (struct sockaddr, sa_family));
+      else
+	addr->sa_family = family;
+    }
 
   return 0;
 }