[PATCH 10/13] Fix ACL copying when renaming users

[Bron Gondwana]

From: Bron Gondwana <brong at launde.home.brong.net>

Gosh mboxlist_lookup provides a dangerous interface!
---
 imap/user.c |   17 +++++++++++++++--
 1 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/imap/user.c b/imap/user.c
index 8d439c0..5ae03d7 100644
--- a/imap/user.c
+++ b/imap/user.c
@@ -91,8 +91,12 @@ static int user_deleteacl(char *name, int matchlen, int maycreate, void* rock)
     int r;
     char *acl;
     char *rights, *nextid;
+    char *origacl, *aclalloc;
 
-    r = mboxlist_lookup(name, &acl, NULL);
+    r = mboxlist_lookup(name, &origacl, NULL);
+
+    /* setacl re-calls mboxlist_lookup and will stomp on us */
+    aclalloc = acl = xstrdup(origacl);
 
     while (!r && acl) {
 	rights = strchr(acl, '\t');
@@ -111,6 +115,9 @@ static int user_deleteacl(char *name, int matchlen, int maycreate, void* rock)
 
 	acl = nextid;
     }
+
+    free(aclalloc);
+
     return 0;
 }
 #endif
@@ -370,8 +377,12 @@ int user_renameacl(char *name, char *olduser, char *newuser)
     int r = 0;
     char *acl;
     char *rights, *nextid;
+    char *origacl, *aclalloc;
 
-    r = mboxlist_lookup(name, &acl, NULL);
+    r = mboxlist_lookup(name, &origacl, NULL);
+
+    /* setacl re-calls mboxlist_lookup and will stomp on us */
+    aclalloc = acl = xstrdup(origacl);
 
     while (!r && acl) {
 	rights = strchr(acl, '\t');
@@ -393,6 +404,8 @@ int user_renameacl(char *name, char *olduser, char *newuser)
 	acl = nextid;
     }
 
+    free(aclalloc);
+
     return r;
 }
 
-- 
1.5.6.3