1 files changed, 5 insertions, 0 deletions
diff --git a/pfinet/io-ops.c b/pfinet/io-ops.c
index bee1c19a..ef8d8513 100644
--- a/pfinet/io-ops.c
+++ b/pfinet/io-ops.c
@@ -87,6 +87,11 @@ S_io_read (struct sock_user *user,
   if (amount > *datalen)
     {
       *data = mmap (0, amount, PROT_READ|PROT_WRITE, MAP_ANON, 0, 0);
+      if (*data == MAP_FAILED)
+        /* Should check whether errno is indeed ENOMEM --
+           but this can't be done in a straightforward way,
+           because the glue headers #undef errno. */
+        return ENOMEM;
       alloced = 1;
     }