From 7ce26772d93115e7c0a2644007351b57030710e6 Mon Sep 17 00:00:00 2001 From: Attila Molnar Date: Sun, 5 Jan 2014 13:47:28 +0100 Subject: Fix possible use of invalid iterator on module unload When a module quits a user or destroys a channel in OnCleanup() the object is no longer in the container being iterated by the time OnCleanup() returns --- src/modules.cpp | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) (limited to 'src') diff --git a/src/modules.cpp b/src/modules.cpp index d25e145e3..b2d2f23c6 100644 --- a/src/modules.cpp +++ b/src/modules.cpp @@ -352,18 +352,23 @@ void ModuleManager::DoSafeUnload(Module* mod) std::vector > items; ServerInstance->Extensions.BeginUnregister(modfind->second, items); /* Give the module a chance to tidy out all its metadata */ - for (chan_hash::iterator c = ServerInstance->chanlist->begin(); c != ServerInstance->chanlist->end(); c++) + for (chan_hash::iterator c = ServerInstance->chanlist->begin(); c != ServerInstance->chanlist->end(); ) { - mod->OnCleanup(TYPE_CHANNEL,c->second); - c->second->doUnhookExtensions(items); - const UserMembList* users = c->second->GetUsers(); + Channel* chan = c->second; + ++c; + mod->OnCleanup(TYPE_CHANNEL, chan); + chan->doUnhookExtensions(items); + const UserMembList* users = chan->GetUsers(); for(UserMembCIter mi = users->begin(); mi != users->end(); mi++) mi->second->doUnhookExtensions(items); } - for (user_hash::iterator u = ServerInstance->Users->clientlist->begin(); u != ServerInstance->Users->clientlist->end(); u++) + for (user_hash::iterator u = ServerInstance->Users->clientlist->begin(); u != ServerInstance->Users->clientlist->end(); ) { - mod->OnCleanup(TYPE_USER,u->second); - u->second->doUnhookExtensions(items); + User* user = u->second; + // The module may quit the user (e.g. SSL mod unloading) and that will remove it from the container + ++u; + mod->OnCleanup(TYPE_USER, user); + user->doUnhookExtensions(items); } for(char m='A'; m <= 'z'; m++) { -- cgit v1.2.3