Bug #4026 for IPTables-IPv4: secon commit causes segmentation fault

Mon Oct 06 11:16:33 2003 Guest - Ticket created

Subject:

secon commit causes segmentation fault

IPTables-IPv4-0.98 This is perl, v5.8.0 built for i386-linux-thread-multi Linux aqua 2.4.21-rc1 #2 Mon May 12 08:03:26 CEST 2003 i686 unknown my $table = IPTables::IPv4::init('filter'); # some operations with chains / rules $table $table->commit(); # some other operations with chains / rules $table $table->commit(); # causes segmentation fault !!!

Sun Oct 12 12:56:14 2003 demon [...] now.ai - Correspondence added

[guest - Mon Oct 6 11:16:33 2003]: Show quoted text

> IPTables-IPv4-0.98 > This is perl, v5.8.0 built for i386-linux-thread-multi > Linux aqua 2.4.21-rc1 #2 Mon May 12 08:03:26 CEST 2003 i686 unknown > > my $table = IPTables::IPv4::init('filter'); > # some operations with chains / rules $table > $table->commit(); > # some other operations with chains / rules $table > $table->commit(); # causes segmentation fault !!!

You shouldn't be doing anything after the commit(). The handle is no longer good after that. I'll have to see how this can be better enforced. -- Derrik Pates dpates@dsdk12.net

Mon Oct 13 13:15:04 2003 demon [...] now.ai - Correspondence added

Please try the current CVS tree. It can be downloaded at http://sourceforge.net/projects/iptperl/ . [guest - Mon Oct 6 11:16:33 2003]: Show quoted text

> my $table = IPTables::IPv4::init('filter'); > # some operations with chains / rules $table > $table->commit();

After this point, the object in $table will be replaced with undef. Show quoted text

> # some other operations with chains / rules $table > $table->commit(); # causes segmentation fault !!!

This will cause an error in your program, because you'll be invoking methods on an undefined value. It should not have been allowed before, but I wasn't properly handling the case of commit() being invoked. -- Derrik Pates dpates@dsdk12.net

Fri Aug 13 16:25:39 2004 demon [...] now.ai - Status changed from 'new' to 'resolved'