[linux-pam] Write to *rounds only if non-NULL.

[Tomáš Mráz]

commit 45ec020678ffc82f6c2849935907e2d83710a1f2
Author: Tomas Mraz <tmraz(a)fedoraproject.org&gt;
Date:   Fri Sep 13 15:20:01 2013 +0200

    Write to *rounds only if non-NULL.
    
    modules/pam_unix/support.c(_set_ctrl): Write to *rounds only if non-NULL.

 modules/pam_unix/support.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/modules/pam_unix/support.c b/modules/pam_unix/support.c
index d8f4a6f..9284dba 100644
--- a/modules/pam_unix/support.c
+++ b/modules/pam_unix/support.c
@@ -176,7 +176,7 @@ int _set_ctrl(pam_handle_t *pamh, int flags, int *remember, int
*rounds,
 	  free (val);
 
 	  /* read number of rounds for crypt algo */
-	  if (on(UNIX_SHA256_PASS, ctrl) || on(UNIX_SHA512_PASS, ctrl)) {
+	  if (rounds && (on(UNIX_SHA256_PASS, ctrl) || on(UNIX_SHA512_PASS, ctrl))) {
 	    val=search_key ("SHA_CRYPT_MAX_ROUNDS", LOGIN_DEFS);
 
 	    if (val) {