[hurd] 10/17: Check for a return value in netfs_make_peropen before using it in netfs_make_protid.

[Samuel Thibault]

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sthibault pushed a commit to branch upstream
in repository hurd.

commit da578dac78504aa00d0b0bc1d929c4df63dcf5cd
Author: Flavio Cruz <address@hidden>
Date:   Sun Feb 7 09:51:24 2016 -0500

    Check for a return value in netfs_make_peropen before using it in 
netfs_make_protid.
    
    * libnetfs/trans-callback.c: Add check for netfs_make_peropen.
---
 libnetfs/trans-callback.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/libnetfs/trans-callback.c b/libnetfs/trans-callback.c
index f4f0c62..3f1aee6 100644
--- a/libnetfs/trans-callback.c
+++ b/libnetfs/trans-callback.c
@@ -58,14 +58,18 @@ _netfs_translator_callback2_fn (void *cookie1, void 
*cookie2, int flags,
   struct protid *cred;
   struct node *node = cookie1;
   struct iouser *user;
+  struct peropen *po;
 
   err = iohelp_create_simple_iouser (&user, node->nn_stat.st_uid,
                                   node->nn_stat.st_gid);
   if (err)
     return err;
 
-  cred = netfs_make_protid (netfs_make_peropen (node, flags, cookie2),
-                           user);
+  po = netfs_make_peropen (node, flags, cookie2);
+  if (! po)
+    return errno;
+
+  cred = netfs_make_protid (po, user);
   if (cred)
     {
       *underlying = ports_get_right (cred);

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