[linux-pam] Fix the split on @ in the user field. (Red Hat Bug #732081)

[Tomáš Mráz]

commit 61f4f06abc9b8fcb3c478fa430b52499fd2ca300
Author: Tomas Mraz <tmraz(a)fedoraproject.org&gt;
Date:   Thu Aug 25 15:48:51 2011 +0200

    Fix the split on @ in the user field. (Red Hat Bug #732081)

 ChangeLog                       |    5 +++++
 modules/pam_access/pam_access.c |    5 ++++-
 2 files changed, 9 insertions(+), 1 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 7563098..b4f1ef8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
[phone]  Tomas Mraz  <tm(a)t8m.info&gt;
+
+	* modules/pam_access/pam_access.c (user_match): Fix the split
+	  on @ in the user field. (Red Hat Bug #732081)
+
 2011-08-23  Tomas Mraz  <tm(a)t8m.info&gt;
 
 	* modules/pam_env/pam_env.c (_pam_parse): Fix missing dereference.
diff --git a/modules/pam_access/pam_access.c b/modules/pam_access/pam_access.c
index 0eb1e8c..472116c 100644
--- a/modules/pam_access/pam_access.c
+++ b/modules/pam_access/pam_access.c
@@ -521,7 +521,10 @@ user_match (pam_handle_t *pamh, char *tok, struct login_info *item)
      * name of the user's primary group.
      */
 
-    if (tok[0] != '@' && (at = strchr(tok + 1, '@')) != 0) {
+    /* Try to split on a pattern (@*[^@]+)((a)+.*) */
+    for (at = tok; *at == '@'; ++at);
+
+    if ((at = strchr(at, '@')) != NULL) {
         /* split user@host pattern */
 	if (item->hostname == NULL)
 	    return NO;